Answer:
Explanation:
In the free fall motion we have that the acceleration is constant and produced by gravity, this acceleration has a magnitude of 32 ft/s2 or 9.8 m/s2 depending on the units you are working with. This means that every second the speed changes a magnitude of 32 ft/2, the velocity will depend of whether the ball is going upward (positive) or downward (negative).
A) At the highest point the ball stops to start the descend, here v=0 ft/s
B) +32 ft/s. The vector is going up, in the next second the velocity is going to be 0 (negative acceleration)
C) V=vf-vo=0-32=-32 ft/s is the constant change in velocity in projectile motion
D) -32 ft/s. The vector is pointing downward
E) V=vf-vo=-32-0=-32 ft/s is the constant change in velocity in projectile motion, 32 ft/s per second
F) Delta V=vf-vo=-32-32=-72 ft/s
g) gravity acceleration is constant 32 ft/s2 (pointing downward vector)
A girl sits on a tire swing and is pushed in a circular motion by her father. Her tangential speed is 2.8 m/s and the girl travels in a circle with a diameter of 4.0 m. What is the girl's centripetal acceleration?
Answer:
[tex]a_c = 3.92 m/s^2[/tex]
Explanation:
tangential speed of the girl is given as
[tex]v_t = 2.8 m/s[/tex]
diameter of the circle is given as
[tex]d = 4.0 m[/tex]
so here the radius of the circle is given as
[tex]R = 2.0 m[/tex]
now we know that centripetal acceleration of the object moving in circle is given as
[tex]a_c = \frac{v^2}{R}[/tex]
[tex]a_c = \frac{2.8^2}{2}[/tex]
[tex]a_c = 3.92 m/s^2[/tex]
How is Marta’s study biased
Marta's study is based on how much junk food/ healthy food does boys vs. girls consume.
Answer:
Marta already thinks one group eats healthier than the other.
Marta does not clearly define “healthy foods.”
Explanation:
Rarefaction occurs only in a ___ wave.
A: transverse
B: longitudinal
C: sympathetic
D: forced
Answer:B: longitudinal
Explanation:
Why non-metals aren't good at conducting electricity?
Which would usually be studied by a geologist
Pleaseeee hurry!!!
Atom A has an atomic number of 19 and mass number of 40. Atom B has an atomic number of 20 and a mass number of 40.
Which of these is an accurate statement?
A) Atom A has more protons than Atom B.
B) Atom A has one less proton and one more neutron than Atom B.
C) Atom A has an extra nucleon compared to Atom B.
D) Atom A has one more proton and one more electron than Atom B.
Answer: C
Explanation: this is called an isotope which has equal number of protons but different numbers of neutrons in the nucleus hence different atomic mass but no difference in chemical properties.
which weights would you use on a single thread to create a 6.86N force
6.86 N = (mass) x (9.8 m/s²)
Mass = (6.86 N) / (9.8 m/s²)
Mass = (6.86 kg-m/s²) / (9.8 m/s²)
Mass = (6.86/9.8) kg
Mass = 0.7 kilogram
I would use the 500-gram weight and the 200-gram weight, and hang them both from the end of the thread. Then the total mass on the end of the thread is 700 grams. When I take it to Earth, it will weigh 6.86 N .
What is the velocity of a wave with a frequency of 760 Hz and a wavelength of 0.45 m?
Final answer:
Velocity of a wave is obtained by multiplying its frequency by its wavelength. In this case, the velocity of the wave with a frequency of 760 Hz and a wavelength of 0.45 m is 342 m/s.
Explanation:
Velocity of a wave is calculated by multiplying the frequency of the wave by its wavelength. In this case, with a frequency of 760 Hz and a wavelength of 0.45 m, the velocity of the wave can be found by multiplying the frequency and the wavelength: 760 Hz x 0.45 m = 342 m/s.
A ball is thrown horizontally from the roof of a building 7.8 m tall and lands 9.5 m from the base. what was the ball's initial speed
The problem deals with finding the initial horizontal speed of a ball thrown from a building, using kinematic equations and the principles of projectile motion.
Explanation:The student is asking about the initial speed of a ball that is thrown horizontally from the roof of a building. To solve this problem, we need to use the principles of kinematics, specifically the equations of motion for uniformly accelerated bodies. Since the ball is thrown horizontally, its initial vertical speed is 0 m/s. The only vertical motion is due to gravity. We can calculate the time it takes for the ball to hit the ground using the formula for free fall distance d = rac{1}{2}gt^2, where d is the distance fallen, g is the acceleration due to gravity (9.8 m/s^2), and t is time. Solving for t, we find that t = rac{2d}{g}.
Which of the following is not an application of Doppler technology?
police speed guns
weather radar
ultrasound imaging of the liver
determining the motion of a star
Answer:
ultrasound imaging of the liver.
Explanation:
Liver ultrasound is not an application of the Doppler effect. The use of ultrasound is more common in medicine, for example, during pregnancy.
Another application in medicine is with the movement of blood. It is a flowmeter which allows the blood flow to be discovered through the Doppler effect, since a sound wave affects the red blood cells that are in motion inside the vessel and collect the echo signal.
Which layer is thinnest under the oceans and thickest in the mountains
The ________ approach emphasizes looking at the whole, rather than the sum of its parts.
psychodynamic
behavioral
functionalism
Gestalt
what essential characteristic does a good experiment have? a. a control group is given the experimental treatment. b. a single variable is tested. c. a control is used. d. both b and c
A good experiment should have a control and test a single variable.
Explanation:A good experiment should have the essential characteristic of using a control to compare the results of the experimental treatment. This ensures that any changes or effects seen in the experimental group can be attributed to the treatment being tested and not to other factors. Additionally, a good experiment should test a single variable to isolate the specific factor being studied.
For example, if a scientist is testing the effect of a new fertilizer on plant growth, they would have two groups of plants - one receiving the new fertilizer (experimental group) and one receiving no fertilizer (control group). By comparing the growth of the two groups, they can determine if the fertilizer had any effect.
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Lydia is often described as having a positive outlook on life. She assumes the best of people and situations. Lydia exemplifies ________.
Answer:
Optimism.Explanation:
Optimism could be defined as a spiritual and mental disposal for positive outcomes, refers to the best future coming, the opposite of pessimism.
A optimistic person is who have a positive view of situation, even if it isn't seem like that, even these kind of people see positiveness in others, like Lydia.
Calculate the moment of inertia of uniform circular disc of mass 500g, radius 10cm about 1.the diameter of the disc. 2. the axis tangent to the disc parallel to its diameter 3.the axis through the center of the disc and perpendicular to its plane
Mass of the disc is equal to 500 g (m=500 g)
Radius of the disc if equal to 10 cm (r=10 cm)
1. The diameter of the disc:
D = 1/4 (m) (r)^2
= 1/4 (500) x 10^2 g cm^2
= 12500 g cm^2
2. The axis tangent to the disc and parallel to its diameter:
= 1/4 (m) (r )^2 + m (r )^2
= 5/4 x 500 x 10^2 g cm^2
= 62500 g cm^2
3. The axis through the center or the disc and perpendicular to its plane:
= 1/2 (m) (r )^2 – ½ x 500 x 10^2 g cm^2
= 25000 g cm^2
The moment of inertia for the disc about its diameter is 0.0025 kg.m², the moment of inertia about an axis tangent to the disc parallel to its diameter is 0.0075 kg.m², and the moment of inertia about an axis through the center and perpendicular to the disc's plane is 0.005 kg.m².
Explanation:The moment of inertia (I), a measure of an object's resistance to rotational motion about an axis, varies depending upon the axis of rotation. Various formulae apply for different axes:
About the diameter of the disc: Here, the formula is I = 1/2 ×m ×R², where m is the mass and R is the radius. Substituting the provided values(m = 500g = 0.5kg, R = 10cm = 0.1m), we find that the moment of inertia about the diameter is I = 1/2 ×0.5kg × (0.1m)² = 0.0025 kg.m².The axis tangent to the disc parallel to its diameter: For this case, we would use the parallel axis theorem: I = I_center of mass + m×d². Here, d is the distance from the center of mass to the new axis, which equals the radius (R). Since the moment of inertia about the diameter (I_center of mass) is 0.0025kg.m², the moment of inertia for this axis is I = 0.0025 kg.m² + 0.5kg × (0.1m)² = 0.0075kg.m².The axis through the center of the disc and perpendicular to its plane: Here, the formula is I = m × R². Substituting the given values, we find the moment of inertia is I = 0.5kg × (0.1m)² = 0.005 kg.m².Learn more about Moment of Inertia here:https://brainly.com/question/30051108
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If i measure the parallax of a star to be 0.125 arc seconds, what is its distance in parsecs?
To compute for the distance of a star given the parallax, we simply have to take the reciprocal of the magnitude of parallax. In this case, distance is:
distance = 1 / parallax
distance = 1 / 0.125
distance = 8 parsecs
what i the distance that light moves in a year called
nocturnal year
solar year
planetary year
light-year
Answer:
correct answer is - light year
Explanation:
Ignoring effects caused by differences in depth, the pressure in a contained fluid is __________.
a. the same throughout the fluid
b. higher in some places and lower in other places
c. unknown as long as the fluid is contained
When you add heat energy the molecules move ______ and _____
If a person has the values for an objects density and volume , what value can be calculated
Answer:If a person has the values for an object’s density and volume, what value can be calculated?
Explanation: The answer is C
Assume that you stay on the earth's surface. what is the ratio of the sun's gravitational force on you to the earth's gravitational force on you?
The ratio of gravitational force of the sun to the earth's gravitational force is about 1 : 1580
[tex]\texttt{ }[/tex]
Further explanationNewton's gravitational law states that the force of attraction between two objects can be formulated as follows :
[tex]\large {\boxed {F = G \frac{m_1 ~ m_2}{R^2}} }[/tex]
F = Gravitational Force ( Newton )
G = Gravitational Constant ( 6.67 × 10⁻¹¹ Nm² / kg² )
m = Object's Mass ( kg )
R = Distance Between Objects ( m )
Let us now tackle the problem !
[tex]\texttt{ }[/tex]
Given:
radius of Earth = Re = 6.4 × 10⁶ m
mass of the Earth = Me = 6.0 × 10²⁴ kg
distance from Sun to Earth = Rs = 147 × 10⁹ m
mass of the Sun = Ms = 2.0 × 10³⁰ kg
Asked:
ratio of gravitational force of the sun and the earth = ?
Solution:
[tex]F_s : F_e = G \frac{ m M_s }{R_s^2} : G \frac{ m M_e }{R_e^2}[/tex]
[tex]F_s : F_e = \frac{ M_s }{R_s^2} : \frac{ M_e }{R_e^2}[/tex]
[tex]F_s : F_e = \frac{ 2 \times 10^{30} }{(147 \times 10^9)^2} : \frac{ 6.0 \times 10^{24} }{ (6.4 \times 10^6)^2}[/tex]
[tex]F_s : F_e \approx 1 : 1580[/tex]
[tex]\texttt{ }[/tex]
Learn moreImpacts of Gravity : https://brainly.com/question/5330244Effect of Earth’s Gravity on Objects : https://brainly.com/question/8844454The Acceleration Due To Gravity : https://brainly.com/question/4189441[tex]\texttt{ }[/tex]
Answer detailsGrade: High School
Subject: Physics
Chapter: Gravitational Fields
The ratio of the Sun's gravitational force on an individual to that of Earth's can be found using Newton's Law of Universal Gravitation, which takes into account the masses of the Earth and Sun and the distances from the individual to the centers of these celestial bodies.
Explanation:
To calculate the ratio of the Sun's gravitational force on you to the Earth's gravitational force on you, we would use Newton's Law of Universal Gravitation, which states that the force of gravity between two masses is proportional to the product of their masses and inversely proportional to the square of the distance between their centers. For an object of mass m on the Earth's surface, the gravitational force it experiences due to the Earth (Fearth) can be calculated using the formula:
Fearth = G × (Mearth × m) / r2
where G is the gravitational constant, Mearth is the mass of the Earth, m is the mass of the object, and r is the radius of the Earth. Similarly, the gravitational force due to the Sun (FSun) is:
FSun = G × (Msun × m) / d2
where Msun is the mass of the Sun and d is the average distance from the Earth to the Sun. Given that both m and G are constants and cancel out when we take the ratio FSun/Fearth, the final ratio depends only on the masses of the Earth and Sun and the distance between the Earth and the Sun relative to the radius of the Earth.
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A bucket of mass 1.90 kg is whirled in a vertical circle of radius 1.45 m . at the lowest point of its motion the tension in the rope supporting the bucket is 24.0 n . find the speed of the bucket
What is the mission of the mars Land Rover, and why is it important?
jack tries to place magnets on his refrigerator at home, but they won’t stick. What could be the reason?
I Honestly Think Its A, If Its Wrong Im Sorry. But Im Sure Its A
When using science to investigate physical phenomena, which of the following is NOT a characteristic of the event must exist?
how long will it take to travel 200,000m traveling 10m/s
During which portion of the earth's revolution around the sun is the northern hemisphere tilted toward the sun?
When a loop of current-carrying wire turns continuously in a magnetic field, a _________ is created.?
Answer: The correct answer is torque.
Explanation:
When a loop of current carrying wire turns continuously in a magnetic field then torque will act on the loop. The loop tends to rotate such that its normal becomes aligned with magnetic field. Torque is a force which rotate the object about an axis.
Torque depends on the orientation of normal to the coil to the direction of the magnetic field.
Therefore, when a loop of current-carrying wire turns continuously in a magnetic field, torque is created.
What is the relationship between work and power
Power is a measure of how quickly work is done or how quickly energy is transferred. The relationship between work and power is (P) = W ÷ t
The following equation describes how work and power are related:
Power (P) = W ÷ t
The power production is larger when the same amount of work is completed in less time. On the other hand, if the work is spread out over more time, the power production is lower.
For instance, if two people work equally hard but one does the task faster than the other, that person is exerting more power than the person who takes longer.
This relationship demonstrates how power is influenced by both the quantity and duration of work.
Therefore, The relationship between work and power is (P) = W ÷ t
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What do the vertical columns in the periodic table indicate?
A.periods
B.liquids
C.synthetic elements
D.groups and families
The correct answer is
D. Groups and Families
I did the quiz nd this was the right answer
Hopes this helps :)