Answer:
The gravitational attraction of the Sun is what holds the planets in their elliptical orbits. So to explain this the mass effects the motion of the planets because the strength of gravitational force depends of the mass.
Explanation:
The mass of a planet affects the motion of the planet around the sun because mass is directly proportional to the gravitational force.
What is gravity?The force of attraction felt by a person at the center of a planet or Earth is called as the gravity.
Force of gravity between Sun and planet while moving in orbit is given by
F = GMm/R²
where M is the mass of Sun, m is the mass of any planet, G = gravitational constant = 6.67 x 10⁻¹¹ N.m²/kg² and R is the distance between two masses.
The weight of a person or object is determined by gravity. The gravitational attraction of the Sun holds the planets to move in their elliptical orbits.
Thus, the mass effects the motion of the planets because the strength of gravitational force depends of the mass of planet
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8. The acceleration of an object is zero. Which best describes the possible motion of the object?
The object is traveling at constant velocity or is slowing down.
The object is traveling at constant speed but may be changing direction.
The object is at rest or is traveling at constant velocity.
The object is at rest.
C
The object is at rest or is traveling at constant velocity.
ExplanationAcceleration is rate of change of velocity and velocity is a vector quantity which means that it is speed with direction.
If acceleration is zero it means that velocity is constant.
Constant velocity may include zero velocity or "at rest"
and
Speed is zero or speed is constant and no change in direction
When the acceleration of an object is zero, the object can either be traveling at a constant velocity or be at rest.
If the acceleration of an object is zero, the possible motion of the object can be described as either traveling at a constant velocity or being at rest. This means that the object can be moving at a steady speed in a straight line or not moving at all. It is important to note that even though the object is at rest, it is still considered to have a constant velocity because velocity includes both speed and direction.
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The medium at point P will?
Stationary waves (so called because they seem to be immobile) occur when two waves interfere with the same frequency, amplitude but with different direction, along a line with a phase difference of half wavelength.
In this kind of waves there are two types of points:
The nodes, which are points that remain motionless or stationary and do not vibrate. They are due to the destructive interference of both waves when they meet.
The antinodes, which are points that vibrate with a maximum vibration amplitude. They are due to the non-destructive interference of both waves.
According to this explanation and comparing it with the description, when this two waves pass through each other, the point P will become a node, hence it will remain stationary.
A substance has a half-life of 10,000 years and an initial mass of 1,000 grams. How many years will pass before only 250 grams of the substance's parent material is left?
A. 20,000
B.25,000
C. 30,000
D.40,000
➷ After 10,000 years the mass will be:
1,000 / 2 = 500
After 20,000 years the mass will be:
500/2 = 250
As you can see, the correct answer would be A. 20,000 years
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Answer:
A). [tex]t = 20,000 years[/tex]
Explanation:
Half life is the total time after which the substance will decay and remains only half of the initial amount
So here we will say that
initial amount is 1000 gram
Now after one half life only half of the amount will remain
so it is
[tex]m_1 = 1000/2 = 500 gram[/tex]
now again after another half life it will remain half of the initial amount
so it is
[tex]m_2 = 500/2 = 250 gram[/tex]
so it took two half lives
[tex]t = 10,000 + 10,000[/tex]
[tex]t = 20,000 years[/tex]
What is the equation for calculating the electrical force, Fe, between two charges?
When 2 electric charges are place close to each other they experience a force between them. This force may be repulsive or attractive depending on the type of charges involved.
The magnitude of this force depend on the quantity of individual charges and the distance between them.
The force is defined by the Coulomb's law states that: The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them.
The formula for calculating the force between 2 electric charges is ;
F = (kq₁q₂)/d²
Where k is the proportionality constant known as Coulomb's constant,
q₁ and q₂ are the charges and
d is the distance between q₁ and q₂.
Answer:
C
Explanation:
I did the test kinda sorta and I got this.
Light travels _______ until it strikes an object or moves from one medium to another
A.
in a zig-zag pattern
B.
perpendicular to its source
C.
in an unpredictable way
D.
in a straight line
Light travels is a straight line so the answer is "D)."
All electromagnetic waves travel in a straight line (D) until they hit something that reflects or refracts or absorbs them, or until they hit the boundary at the beginning of a different medium.
That includes light, because light is an electromagnetic wave.
All of the following are functions of the sensory somatic nervous system except
it sends signals that control heat rate and respiration
it receives messages and relays stimulus to contract muscle fibers
it receives messages from the central nervous system
it sends messages directly to muscles and glands
Answer:
It sends signals that control heat rate and respiration
Explanation:
We breath without thinking this is because of the the autonomic nervous system. (ANS) is an involuntary system it acts without our conscious control.
The sensory-somatic nervous system do not control heat rate and respiration. Hence, option (A) is correct.
The nervous system containing sensory as well as the motors neurons is known as sensory-somatic nervous system. These are made up of the cranial and spinal nerves that transmit information from the skin, skeletal muscles to the Central Nervous System.
As per the given problem:
(A)
The sensory-somatic nervous system sends signals from skin and muscle to Central Nervous System, but it does not control heat rate and respiration. Hence, this statement is correct (means it is not the function of sensory-somatic nervous system).
(B)
Sensory-somatic nervous system receives messages and relays stimulus to contract muscle fibers. Hence, it is a function and the option is incorrect.
(C)
The sensory-somatic nervous system exchanges the information between the various organs to Central Nervous System. Hence, the option is incorrect.
(D)
At some instant, sending neuro signals directly to muscle and glands is also a function of sensory-somatic nervous system. So, the option is incorrect.
Thus, we conclude that out of all the given options, the sensory-somatic nervous system do not control heat rate and respiration. Hence, option (A) is correct.
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A football field is 100 yards long. If it takes a person 20 seconds to run its length, how fast were they running? Record your answer in yd/s and m/s.
it is 5 yds/s to run the football firld
Which is an example of a chemical change?
Answer: Option C
Explanation: The chemical change can be defined as the change that once occurred cannot be reversed by any means.
The metal corrosion in the salt water is an example of chemical change as it cannot be reversed once the metal is corroded. This also results in the change in the color of the metal and further decaying of the metal at later stages.
Which of the following is not a benefit of improved cardio-respiratory fitness?
A. Arteries grow bigger
B. Resting blood pressure goes down
C. Risk of heart disease decreases
D. Slower post exercise recovery time
I wanna say it’s D. Slower post exercise recovery time.
Slower post exercise recovery time is not a benefit of improved cardio-respiratory fitness. Thus, the correct option is D.
Cardiorespiratory fitness is the ability of the circulatory and respiratory systems to supply sufficient amount of oxygen to skeletal muscles during sustained physical activity. Scientists and researchers use cardiorespiratory fitness to assess the functional capacity of the respiratory and the cardiovascular systems.
The benefits of cardiorespiratory exercise include lower blood pressure, improve blood flow, improve workout efficiency, lower cholesterol levels, decrease risk of heart disease, stroke and diabetes, and other heart-healthy habits.
Therefore, the correct option is D.
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In which order would the the rocket pass through the layers of the atmosphere
A rocket ascending from Earth passes through the atmosphere in the following order: troposphere, stratosphere, mesosphere, thermosphere, and then the exosphere.
Explanation:The question pertains to the order in which a rocket would pass through the layers of Earth's atmosphere. The layers of the atmosphere, starting from the surface of Earth moving outward into space, are the troposphere, stratosphere, mesosphere, thermosphere, and finally the exosphere. As a rocket ascends from Earth's surface on its journey into space, it first moves through the troposphere, where weather phenomena occur, then into the stratosphere, known for its ozone layer that absorbs and scatters the sun's ultraviolet radiation. Following the stratosphere, the rocket enters the mesosphere, where meteors burn up upon entry. The journey continues through the thermosphere, the largest layer, where auroras occur and temperatures increase significantly with altitude due to solar radiation absorption. Finally, the rocket reaches the exosphere, the outermost layer where Earth's atmosphere merges into the vacuum of space.
What is the magnetic field strength, in units of microTesla (T), at a distance of 6.3 cm from a long straight wire carrying a current of 6.5 A?
Answer:
[tex]2.1 \mu T[/tex]
Explanation:
The magnetic field strength is given by:
[tex]B=\frac{\mu_0 I}{2 \pi r}[/tex]
where
[tex]\mu_0[/tex] is the vacuum permeability
I is the current
r is the distance from the wire
In this problem,
I = 6.5 A
r = 6.3 cm = 0.063 m
So, the magnetic field strength is
[tex]B=\frac{(1.256\cdot 10^{-7} H/m)(6.5 A)}{2 \pi (0.063 m)}=2.1\cdot 10^{-6} T=2.1 \mu T[/tex]
11. How many times could Haley fly between the two flowers in 1 minute (60 seconds)?
Without additional information on Haley's flying speed and the distance between flowers, we cannot calculate the number of times she could fly between the two flowers in one minute.
Explanation:To determine how many times Haley could fly between the two flowers in 1 minute, we need additional information such as the distance between the flowers and the speed at which Haley flies. Since this information is not provided, we cannot accurately calculate the number of times Haley could make the trip. We can however provide information on how to approach the problem once the relevant data is available.
If we knew the flight time for one trip between the flowers, we could divide 60 seconds by that flight time to find out how many trips could be made in a minute. For example, if it takes Haley 5 seconds to fly between two flowers, then she could make 12 trips in one minute (60 seconds divided by 5 seconds per trip).
what coefficient of KCI
Explanation:
Start with the unbalanced equation:
KClO
3
→
KCl
+
O
2
A method that often works is to balance everything other than
H
and
O
first, then balance
O
, and finally balance
H
.
Another rule is to start with what looks like the most complicated formula.
The most complicated formula looks like
KClO
3
.
We put a
1
in front of it and mark the
1
to remind ourselves that the number is now fixed.
We can't change a coefficient unless we run into a roadblock (like having to use fractions).
My teacher never let me use fractions.
My solution when I hit a roadblock was to erase all the numbers and then start over again with a 2 as the starting coefficient.
We start with
1
KClO
3
→
KCl
+
O
2
Balance
K
:
We have 1
K
on the left, so we need 1
K
on the right. We put a
1
in front of the
KCl
.
1
KClO
3
→
1
KCl
+
O
2
Balance
Cl
:
Cl
is already balanced, with 1
Cl
on each side.
Balance
O
:
We have 3
O
atoms on the left and only
2
on the right. We need 1½
O
2
molecules on the right. Uh, oh! Fractions!
We start over with a 2 as the coefficient.
2
KClO
3
→
2
KCl
+
O
2
Now we have 6
O
atoms on the left. To get 6
O
atoms on the right, we put a 3 in front of the
O
2
.
2
KClO
3
→
2
KCl
+
3
O
2
Every formula now has a fixed coefficient.
We should have a balanced equation.
Let’s check:
Left hand side: 2
K
, 2
Cl
, 6
O
Right hand side: 2
K
, 2
Cl
, 6
O
All atoms balance.
The balanced equation is
The coefficient of KCl in a dissolution reaction is '1'. The question may be mixing up the concept of KCl dissolution with equilibrium constants for other reactions, such as CO2 with water. A chemical context is needed to provide a specific coefficient for KCl.
Explanation:The question what coefficient of KCl appears to be asking for the coefficient (stoichiometric number) in front of the chemical formula KCl in a balanced chemical equation. However, to provide a specific coefficient, there needs to be a context of a complete chemical reaction. If the reaction is simply the dissolution of KCl in water, the coefficient is typically '1' because the dissolution equation would be KCl(s) → K+(aq) + Cl-(aq), with each ion being produced in a 1:1 ratio.
In chemistry, equilibrium constants, such as the solubility product constant (Ksp) for salts like KCl, are crucial for understanding the solubility and dissociation of compounds. The Ksp for KCl would be the product of the concentrations of the K+ and Cl- ions at equilibrium. The value of K you mentioned corresponds to the equilibrium constant for the reaction between carbon dioxide and water, which is different from the solubility product of KCl.
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The use of wind power to generate electricity is a big advantage because it is____.
A.) Nonpolluting
B.) Exhaustible
The answer is Nonpolluting
The correct answer would be A (Nonpolluting), hope this helps! (:
according to the scientific method, which do you have to do before you can form a hypothesis
Final answer:
To form a hypothesis, one must first make observations, identify a question, and conduct research to understand existing knowledge about the subject.
Explanation:
Before forming a hypothesis, it is essential to perform some initial steps according to the scientific method. These steps include making observations about natural phenomena, which might often involve reading existing scientific literature. After making these observations, the next step is identifying a question one would like to answer based on those observations. Following this, the scientist engages in research to find out what is already known about the topic. It is this research and understanding of the current knowledge that informs the development of a testable, evidence-based hypothesis.
answer to question 4
(A) is the answer for #4
Suppose an astronaut were to visit a planet where the force of gravity is half that of Earth. His mass on that planet would be:
A. zero
B. the same as his earth mass
C. twice his earth mass
D. half his earth mass
"Mass" is what YOU ARE. It doesn't matter whether you're on Earth, on the moon, on an asteroid, on a meteoroid, on the sun, swimming in chicken soup on Saturn, or in a space capsule falling from one solar system body to another one. Your mass DOESN'T change.
Whatever mass the astronaut had after he ate that steak dinner just before he was launched, THAT's the mass he has while he's on the way to another planet, and THAT's the same mass he'll have when he gets there. It makes no difference what the gravity is like on the other planet. His mass will not change. (choice-B)
Only his WEIGHT changes when he's in different places.
The correct answer is B. His mass on that planet would be the same as his earth mass.
The mass of an object is an intrinsic property and does not change with the change in gravity. Mass is a measure of the amount of matter in an object and remains constant regardless of the object's location in the universe. Therefore, the astronaut's mass on the planet with half the Earth's gravity would be the same as his mass on Earth.
However, it is important to note that while the astronaut's mass remains the same, his weight would change. Weight is the force exerted by gravity on an object's mass, and it is calculated by the equation [tex]\( W = m \cdot g \)[/tex], where W is the weight, m is the mass, and g is the acceleration due to gravity. Since the force of gravity on this hypothetical planet is half that of Earth, the astronaut's weight would be half of what it is on Earth. But again, his mass would remain unchanged.
Use the drop-down menus to identify the parts of DNA. Label A: Label B:
Label A:
Nitrogen bases
Label B:
Sugar-phosphate backbone
Answer:
Nitrogen bases
Sugar-phosphate backbone
Explanation:
What is the magnetic flux linkage, in units of Weber, for a coil of 360 turns and cross sectional area of 0.133 m^2 when the magnetic flux density of 1.74 T passes through the area perpendicularly?
Answer:
83.3 Wb
Explanation:
The magnetic flux linkage through the coil is given by:
[tex]N\phi = BAN sin \theta[/tex]
where
B is the magnetic field strength
A is the cross sectional area
N is the number of turns in the coil
[tex]\theta[/tex] is the angle between the direction of the field and the normal to the coil
In this problem:
B = 1.74 T
A = 0.133 m^2
N = 360
[tex]\theta=90^{\circ}[/tex]
Therefore, the magnetic flux linkage is
[tex]N\phi = (1.74 T)(0.133 m^2)(360) sin 90^{\circ}=83.3 Wb[/tex]
A 0.6 kg basketball with a velocity of +6 m/s rolls toward a 0.2 kg ball of clay with a velocity of +1 m/s. If the balls collide and stick together, what is the velocity following the collision?
7 m/s I believe I would check with your teacher if anything
what is the reading of the vernier calliper?
how much work is done when a 700 N refrigerator is lifted straight up a distance of 4 meters
Answer:
The work done is 2800 Joules
Explanation:
When a force causes a body to move, work is being done on the object
by the force
Work is the measure of energy transfer when a force moves an object
through a distance
→ Work = Force × Distance
→ The SI unit for work is the joule (J)
A refrigerator of 700 N is lifted straight up a distance of 4 meters
We need to find the work done
→ The weight of the refrigerator is 700 N
→ The force = 700 Newtons
→ The refrigerator is lifted straight up 4 m
→ The distance = 4 meters
Substitute these values in the rule below
→ Work = Force × Distance
→ Work = 700 × 4 = 2800 Joules
The work done is 2800 Joules
Why is the amplitude of the radio wave in figure 1 varied?
This is an example of amplitude modulation which is a method to transmit analog signals via radio-spectrum waves. A carrier sine wave (in the image, the one with the higher frequency) is modulated (in amplitude) by another signal (the target of transmission). The carrier due to its appropriate frequency enables successful transmission of a signal that would otherwise be difficult to transmit (due to its too low frequencies) and also enables transmission of multiple channels at different carrier frequencies.
Classic example: AM radio.
A rock on earth has a mass of 750kg and a weight of 7,350 N. If the rock is taken into outer space, how will it’s mass and weight be affected
Answer:
Mass: 750 kg, weight : 0
Explanation:
- The mass represents the amount of matter in an object, and it is an intrinsec property of the object: this means that its value does not depend on the location of the object. Therefore, a rock will have the same mass on earth, on Mars, in the outer space.. no matter its location. So, the mass of the rock in space is still 750 kg.
- The weight of an object corresponds to the gravitational force exerted on the object by the surrounding gravitational field.
On earth, the weight of an object is given by
[tex]W=mg[/tex]
where m is the mass and g is the gravitational acceleration, whose value on earth is g=9.81 m/s^2.
In space, there is no gravity (assuming we are far enough from any other celestial object): since there is no gravitational field, g=0, so the weight of the object is also zero.
The mass of the rock remains unchanged in outer space, but its weight would effectively become zero without a significant gravitational field acting upon it.
When a rock with a mass of 750 kg is taken into outer space, its mass remains unchanged, as mass is a measure of the amount of matter in an object and does not depend on gravity. However, its weight would be affected dramatically because weight is the force exerted by gravity on that mass. In outer space, away from the gravitational pull of a large body like Earth, the rock would be weightless. For example, while the rock weighs 7,350 N on Earth due to Earth's gravity (approximately 9.81 m/s²), on the Moon, it would weigh significantly less, only around 1,237.5 N, because the Moon's gravity is approximately 1.67 m/s². This demonstrates that weight is variable and contingent upon the gravitational field in which the object is located.
Which change would cause the largest increase in a mountain climber’s gravitational potential energy?
Most likely climbing up the mountain
carrying twice the weight and climbing twice as high
In what part of a volcano would you expect to find rocks with the coarsest grains
Answer:
The correct answer is: in the magma chamber.
Explanation:
The volcanoes are creating igneous rocks, and they can be intrusive and extrusive. The intrusive ones are forming deep into the ground, while the extrusive are forming on the surface. Where the rocks are formed makes a big difference in their crystals size. The rocks that form by magma that has cooled the deepest into the ground would have the largest crystals, thus the coarsest grains. The reason for this is that the magma that has been cooling the deepest into the ground will be exposed to higher temperatures and pressures, which will lead to a very slow cooling off. Because the cooling off will be at such a slow rate, the crystals will have enough time to became much larger. The deepest part of a volcano is its magma chamber, thus it will be the place that will produce the coarsest grained igneous rocks.
1.which of the following are true.
a.theories turn into laws with enough proof.
b. A hypothesis can be proven incorrect through experimentation.
C. A theory describes a natural phenomenon but offers no explanation for how it occurs.
D. A scientific law cannot be disproven by future observations
Answer:
its c i did usatestprep
Explanation:
Scientific law cannot be disproven. The correct statements are B and D are correct.
Hypothesis:It is a statement about a natural phenomenon that does not have any scientific proof.
Theory:It is a statement that has strong scientific evidence but can be changed when more data will be present. Theory cannot be changed into law because the theory itself is made up of laws.For example - The theory of relativity.Law:It is universal and had been proven correct every time. It cannot be changed.For example - Laws of motion
Therefore, scientific law cannot be disproven. The correct statements are B and D are correct.
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A 10.00-kilogram block slides along a horizontal, frictionless surface at 12.0 meters per second for 6.00 seconds. The magnitude of the block's momentum is
Answer:
120 kg m/s
Explanation:
The magnitude of the momentum of an object is given by
[tex]p=mv[/tex]
where
m is the mass of the object
v is its speed
For the block in this problem,
m = 10.0 kg (mass of the block)
v = 12.0 m/s (speed of the block)
Therefore the magnitude of the block's momentum is
[tex]p=(10.0 kg)(12.0 m/s)=120 kg m/s[/tex]
how is force related to acceleration and gravity?
Newton's second law of motion describes the relationship between force and acceleration. They are directly proportional. If you increase the force applied to an object, the acceleration of that object increases by the same factor. In short, force equals mass times acceleration.
Final answer:
Force is related to acceleration and gravity through Newton's second law of motion, where F = ma. Gravity causes objects to accelerate towards Earth at a constant rate of 9.8 m/s², regardless of mass. In scenarios like free fall, simple relations like v = u + at show the direct relationship between force and acceleration.
Explanation:
Force is related to acceleration and gravity through Newton's second law of motion. The formula representing this relationship is F = ma, where F is the force applied to an object, m is the mass of the object, and a is the resulting acceleration.
Gravity, as described by Newton's universal law of gravitation, causes objects to accelerate towards Earth at a constant rate of 9.8 m/s² near the surface of the Earth, regardless of their mass. This special property of gravity results in all objects experiencing the same acceleration due to gravity.
When considering a constant force and acceleration scenario, such as free fall in a uniform gravitational field without air resistance, simple relations like v = u + at can be derived, demonstrating the direct relationship between force and acceleration.
A rock is projected upward from the surface of the moon, at time t = 0.0 s, with a velocity of The acceleration due to gravity at the surface of the moon is When does the rock reach a height of 180 m above the moon's surface?
17 s
12 s
30 s
23 s
7.5 s
7.5 seconds
Explanation;Given u= initial velocity=30m/sec
a= acceleration on moon=1.62m/s2
h=180m
Using the equation
h = u(t) - 1/2gt² {where g = 1.62 m/s²} and u = 30 m/s
180 = 30t - (0.5)(1.62)t²
0 = 0.81t² - 30t +180
solving the quadratic equation for the 2 t-values:
t = 7.5 s or t = 30 s
Therefore; the time taken to reach a height of 180 m upwards is 7.5 seconds