Final answer:
To find the mass of a lead cube with the same dimensions as an iron cube weighing 250 g, calculate the volume of the iron cube and multiply it by the density of lead, resulting in a mass of 359.01 g for the lead cube.
Explanation:
The mass of the iron cube is given as 250 g with a density of 7.87 g/cm³. To find the mass of a lead cube with the same dimensions, we first need to calculate its volume, then multiply it by lead's density to determine its mass. Using the provided density of lead (11.3 g/cm3), the calculation is as follows:
Volume of the iron cube = Mass / Density = 250 g / 7.87 g/cm³ = 31.77 cm³ (rounded to two decimal places).
Since both cubes have the same volume, the volume of the lead cube is also 31.77 cm³.
Mass of the lead cube = Volume x Density of lead = 31.77 cm³ x 11.3 g/cm³ = 359.01 g (rounded to two decimal places).
An organism lives in the darkest aquatic ecosystem, where light cannot reach. Which ecosystem is this organism most likely in?
In the darkest aquatic ecosystem, light cannot reach in the The open ocean .
What is Dark aquatic ecosystem?Aquatic ecosystems, which include wetlands, rivers, lakes, and coastal estuaries, are vital to human economy and health as well as crucial components of Earth's dynamic processes.
Wetlands are the link between land and water, operating as natural filters to filter out pollutants, control flooding, and serve as cnidiaries for a variety of aquatic animals.
Estuaries, lakes, and rivers are crucial hubs for transportation, recreation, and biodiversity. Wetlands, rivers, lakes, and coastal estuaries are all aquatic ecosystems—critical elements of Earth’s dynamic processes and essential to human economies and health.
Therefore, In the darkest aquatic ecosystem, light cannot reach in the The open ocean .
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Air pressure is usually lowest during which season?
Ginger examines a painting of a stone path extending into the horizon of a field. two sticks lie horizontally across the path: one in the beginning of the path and the other near the horizon. each stick measures 10 cm in length, but the stick near the horizon appears much larger than the stick at the beginning of the path. which illusion explains this phenomenon?â
15 POINTS!!!
If you microwave a bowl of soup for too long, you might burn your hands when you remove the bowl from the microwave oven. What kind of heat transfer would this be called if you did burn your hands when removing a hot bowl from a microwave oven?
Answer:
conduction
Explanation:
educere
A 66-kg skier starts from rest at the top of a 1200-mlong trail which drops a total of 230 m from top to bottom. at the bottom, the skier is moving 11.0 m/s. how much energy was dissipated by friction?
A total of 1.4 × 10⁵ Joule energy was dissipated by friction
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Further explanationLet's recall Kinetic Energy Formula as follows:
[tex]Ek = \frac{1}{2}mv^2[/tex]
Ek = Kinetic Energy ( Joule )
m = mass of the object ( kg )
v = speed of the object ( m/s )
Let us now tackle the problem !
[tex]\texttt{ }[/tex]
Given:
mass of skier = m = 66 kg
height of trail = h = 230 m
velocity of skier = v = 11.0 m/s
Asked:
work done by friction = W = ?
Solution:
[tex]W = Ep - Ek[/tex]
[tex]W = mgh - \frac{1}{2}mv^2[/tex]
[tex]W = 66(9.8)(230) - \frac{1}{2}(66)(11.0)^2[/tex]
[tex]W = 148764 - 3993[/tex]
[tex]W = 144771[/tex]
[tex]W \approx 1.4 \times 10^5 \texttt{ Joule}[/tex]
[tex]\texttt{ }[/tex]
Conclusion:A total of 1.4 × 10⁵ Joule energy was dissipated by friction
[tex]\texttt{ }[/tex]
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Answer detailsGrade: High School
Subject: Physics
Chapter: Dynamics
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Keywords: Gravity , Unit , Magnitude , Attraction , Distance , Mass , Newton , Law , Gravitational , Constant
Why is the term free market often a misnomer?
Select the best answer from the choices provided.
Because you have to pay for the goods and service you want.
Because the term often refers to trade agreements which contain many regulations.
Because Adam Smith believed the government should control the economy.
Because a command economy is free of government interventions.
NextReset
What are 2 ways objects interact after a collision?
On a grid, what is the distance between two points located at (1, 1) and (8, 4) roughly equal to?
a. 9
b. 3.40
c. 7.61
d. 6.89
which is true of a kilogram of feathers and a kilogram of bricks?
a. they have the same mass
b. they have the same volume
c. the bricks are less dense
d. the feathers are more dense
In comparing a kilogram of feathers and a kilogram of bricks, they have the same mass but do not have the same volume or density. Bricks are more dense than feathers.
Explanation:The comparison between a kilogram of feathers and a kilogram of bricks deals with two primary concepts: mass and density. When we are comparing a kilogram of feathers and a kilogram of bricks, they have the same mass because a kilogram is a measure of mass. Therefore, option (a) is correct.
However, they do not have the same volume and the density of each is different. Density is defined as mass per unit volume. Bricks are denser than feathers. This means that for a given mass, bricks take up less space or volume than feathers. Therefore, neither option (b) nor options (c) and (d) are correct.
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A foul ball is hit straight up into the air with a speed of a bout 25 m/s (a) how high does it go? (b) how long is it in the air
The relevant equations we can use in this problem are:
d = v0 t + 0.5 a t^2
v^2 = v0^2 + 2 a d
a. how high does it go?
We are to find for the distance d. The formula is:
v^2 = v0^2 + 2 a d
where v is final velocity = 0 at the peak, v0 = 25 m/s, a is negative gravity since opposite to direction = - 9.8 m/s^2, d is height achieved = ?
0 = (25)^2 + 2 (-9.8) d
d = 31.89 m
Therefore the maximum height is about 31.89 meters
b. how long is it in the air
We use the formula:
d = v0 t + 0.5 a t^2
in going up, a = -g = -9.8 m/s^2, find for time t:
31.89 = 25 t + 0.5 (- 9.8) t^2
-4.9 t^2 + 25 t = 31.89
t^2 – 5.1 t = 6.51
Completing the square:
(t – 2.55)^2 = 6.51 + 6.5025
t – 2.55 = ± 3.61
t = -1.06, 6.16
Since time cannot be negative, therefore:
t = 6.16 seconds
However this is not the total time yet, because this only accounts for the time going up.
The time going up and going down are equal therefore:
t(total) = 2 t
t(total) = 12.32 seconds
Therefore the foul ball spent 12.32 seconds in the air.
Where are the two lenses located in a compound microscope use in most classrooms today?
Final answer:
In a compound microscope, the ocular lens is located near the eye for viewing and the objective lens is closer to the specimen for initial magnification.
Explanation:
The two lenses located in a compound microscope used in most classrooms today are the ocular lens and the objective lens. The ocular lens, or eyepiece, is found at the top of the microscope and is the lens that you look through with your eye. It often contains multiple lenses within a cylindrical barrel and contributes to magnifying the image. The second lens, known as the objective lens, is located closer to the specimen. It is a convex lens with a short focal length that provides the initial magnification, typically ranging from 5× to 100×. The objectives are commonly mounted on a revolving nosepiece and are designed to be parfocal, allowing the sample to remain in focus when switching between different objective lenses. Both the ocular and objective lenses work together to produce a highly magnified, enlarged image that is far enough from the observer to be easily viewed.
How much time does it take for tweety’s bird cage to hit the ground after it was dropped if it reached a velocity of 22 meters per second right before impact?
how to use proton, neutron, and isotope in a sentence
The number of neutrons varies among isotopes, even when the number of protons is the same.
Different nuclear species of the same element are known as isotopes.
They both belong to the same chemical element since they have the same atomic number (number of protons in their nuclei) and position in the periodic table, but they have distinct nucleon numbers (mass numbers) because they have different numbers of neutrons in their nuclei.
Although the chemical properties of each isotope of a particular element are almost identical, they differ in their atomic weights and physical characteristics.
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1.An electrician is deciding what type of material to use for wires. Based on the periodic table, which of the following would be the best material and reason for its use?
The radius of the earth's very nearly circular orbit around the sun is 1.5 1011 m. find the magnitude of the earth's velocity, angular velocity, and centripetal acceleration as it travels around the sun. assume a year of 365 days. (a) the earth's velocity
The earth's velocity as it orbits the sun is about 2.99 * 10⁴ m/s. The angular velocity is approximately 7.27 *10⁻⁷ rad/s, and the centripetal acceleration is around 5.93 m/s².
Explanation:The earth's velocity (V), angular velocity (ω), and centripetal acceleration (A) can be calculated using the radius of the earth's orbit (r) around the sun and the period of orbit (T).
1. Earth's velocity:
As the earth orbits the sun, it covers a distance of 2πr (the circumference of a circle) in one complete orbit (T). Using the formula V = Δd/Δt, where Δd is the displacement in distance and Δt is the change in time, we can find earth's velocity to be approximately 2π* (1.5 *10¹¹ m)/(1 year) = 2.99 * 10⁴ m/s.
2. Angular velocity:
The earth's angular velocity can be determined by angular displacement over time. Since the earth completes 2π radians in one period of orbit (1 year), ω = Δθ/Δt = 2π/T , which when converted to SI units is approximately 7.27 *10⁻⁷ rad/s.
3. Centripetal acceleration:
Centripetal acceleration is determined using the formula A = V²/r. Using V = 2.99 * 10⁴ m/s and r = 1.5 * 10¹¹ m, we find A is approximately 5.93 m/s².
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What nonfoliated metamorphic rock forms during contact metamorphism of a shale or mudstone?
A 98 kilogram man is accelerating forward at a rate of 1.2 m/s2. What is the unbalanced force necessary to produce the movement?
Answer : The unbalanced force necessary to produce the movement is, 117.6 N
Solution :
Force : It is defined as the force is equal to the product of the mass of an object and the acceleration of an object.
Formula used :
[tex]F=m\times a[/tex]
where,
F = force
m = mass = 98 Kg
a = acceleration = [tex]1.2m/s^2[/tex]
Now put all the given values in the above formula, we get the unbalanced force necessary to produce the movement.
[tex]F=(98Kg)\times (1.2m/s^2)=117.6\text{ Kg }m/s^2=117.6N[/tex]
Therefore, the unbalanced force necessary to produce the movement is, 117.6 N
The unbalanced force necessary to produce the movement of a 98-kilogram man accelerating forward at a rate of 1.2 m/s² is 117.6 Newtons.
Explanation:The unbalanced force necessary to produce the movement of a 98-kilogram man accelerating forward at a rate of 1.2 m/s² can be calculated using Newton's second law of motion:
F = m x a
Where F is the force, m is the mass, and a is the acceleration.
Substituting the given values:
F = 98 kg x 1.2 m/s²
F = 117.6 N
Therefore, the unbalanced force necessary to produce the movement is 117.6 Newtons.
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A wooden block has a mass of 20.0 kg and a specific heat of 1700 J/kg °C. Find the change in thermal energy of the block as it warms from 15.0°C to 25.0°C.
The change in thermal energy of a wooden block with a mass of 20.0 kg and a specific heat of 1700 J/kg°C warming from 15.0°C to 25.0°C is 340,000 Joules (or 340 kJ).
Explanation:To find the change in thermal energy of the block as it warms from 15.0°C to 25.0°C, we can use the formula for specific heat capacity, which is Q = mcΔT. Here, Q represents the thermal energy transferred, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.
For the given wooden block, we know:
Mass (m) = 20.0 kgSpecific heat (c) = 1700 J/kg°CInitial temperature (T1) = 15.0°CFinal temperature (T2) = 25.0°CChange in temperature (ΔT) = T2 - T1 = 25.0°C - 15.0°C = 10.0°CNow we can calculate the change in thermal energy:
Q = mcΔT = (20.0 kg)(1700 J/kg°C)(10.0°C) = 340,000 J
Therefore, the change in thermal energy of the wooden block is 340,000 Joules (or 340 kJ).
How do I calculate the orbital period of Mercury?
Answer:88 days
Explanation: The sidereal.orbital period is calculated from observations. Mercury is observed to come into
superior conjunction with the Sun every 116 days. This is called the "Mercury's synodic year". The sum of the inverse of earth's sidereal year and merciry's synod year equals the inverse of mercury's sidereal year. That is:
1/365.24 + 1/116 = 1/P where P is mercurry's sidereal year.
Therefore, P equals 88 days.
Which planet is approximately 20 times farther from the sun than earth is answer\?
Final answer:
The planet which is approximately 20 times farther from the Sun than Earth is Uranus, orbiting the Sun at an average distance of about 19.8 AU.
Explanation:
The question at hand is: Which planet is approximately 20 times farther from the sun than Earth is? To answer this, we can refer to the concept that the light a planet receives from the Sun decreases with the square of the distance from the Sun. Considering the average distance from Earth to the Sun is about 150 million kilometers (1 Astronomical Unit, AU), a planet that is 20 times farther from the Sun would be at 20 AU.
In our solar system, the planet that falls into this category is Uranus, which orbits the Sun at an average distance of approximately 19.8 AU. This makes Uranus about 20 times farther from the Sun than Earth is, hence receiving much less sunlight compared to Earth.
Which statement describe velocity and acceleration
The path of a table tennis ball after being hit and hitting the surface of the table can be modeled by the function h = -4.9t(t-0.42) where h is the height in meters above the table and t is the time in seconds. How long does it take the ball to hit the table? What is the ball's maximum height?
He density of ice is 0.92 g/cm3; and the density of seawater is 1.03 g/cm3. a large iceberg floats in arctic waters. what fraction of the volume of the iceberg is exposed?
Only about 11% of the volume of the iceberg is exposed.
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Further explanationThe basic formula of pressure that needs to be recalled is:
Pressure = Force / Cross-sectional Area
or symbolized:
[tex]\large {\boxed {P = F \div A} }[/tex]
P = Pressure (Pa)
F = Force (N)
A = Cross-sectional Area (m²)
Let us now tackle the problem !
[tex]\texttt{ }[/tex]
Given:
Density of Ice = ρ_ice = 0.92 g/cm³
Densiy of Seawater = ρ_seawater = 1.03 g/cm³
Asked:
Volume of the exposed iceberg = ΔV = ?
Solution:
We will use Archimedes' principle to solve the problem as follows:
[tex]w = F[/tex]
[tex]mg = \rho_{seawater} g V'[/tex]
[tex]\rho_{ice} \ g V = \rho_{seawater} \ g V'[/tex]
[tex]V' = ( \rho_{ice} \div \rho_{seawater} ) V[/tex]
[tex]V' = (0.92 \div 1.03) V[/tex]
[tex]V' = \frac{92}{103} V[/tex]
[tex]\texttt{ }[/tex]
[tex]\Delta V = V - V'[/tex]
[tex]\Delta V = V - \frac{92}{103} V[/tex]
[tex]\Delta V = \frac{11}{103}V[/tex]
[tex]\Delta V \approx 11 \% V[/tex]
[tex]\texttt{ }[/tex]
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Answer detailsGrade: High School
Subject: Physics
Chapter: Pressure
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Keywords: Gravity , Unit , Magnitude , Attraction , Distance , Mass , Newton , Law , Gravitational , Constant , Liquid , Pressure
If a new wave arrives on shore every two seconds, then its frequency is 2 hz (
a. True
b. False)?
Julia throws a ball vertically upward from the ground with a speed of 5.89 m/s. Andrew catches it when it is on it's way down at a height of 1.27 m from the ground. After how much time does andrew catch the ball?
Honey bees beat their wings, making a buzzing sound at a frequency of 2.3 × 102 hertz. What is the period of a bee's wing beat? 4.3 × 10-3 seconds
Answer:
0.0043 or 4.3 × 10-3 seconds
Explanation:
Period= 1/frequency
[tex]T=\frac{1}{2.3*10^{2} Hz} = 0.0043[/tex] seconds
0.0043 seconds can be expressed in C.N as 4.3 × 10-3 seconds
Which type of investment offers both capital gains and interest income
Answer:
"Stocks" type of investment offers both capital gains and interest income .
Explanation:
justify why a rotten fruit is not truly wasted
The diagram shows a side view of a skateboard ramp.
At which labeled points would the skateboarder have the most kinetic energy?
W and X
X and Y
Y and Z
W and Z
At which labeled points would the skateboarder have the most kinetic energy?
a. W and X
b. X and Yc. Y and Z
d. W and Z
Here's the picture for everyone :0
The skateboarder will have the most kinetic energy at point X and Y.
Kinetic energy is the energy possessed by an object due to its motion. Kinetic decreases with decrease in speed of the object.
K.E = ¹/₂mv²
In the given diagram, the skateboard will have have the highest speed at point X and Y. Kinetic energy is directly proportional to speed
Thus, we can conclude that the skateboarder will have the most kinetic energy at point X and Y.
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Patricia is excited about going to college because she feels that it will benefit her options in life. However, she cannot decide what it is she wants to do with her life. Patricia reads widely and discusses her choices with her friends and parents. During her first two years of college, she decides to take a variety of entry-level classes to see if anything feels like a good fit. Regarding her commitment to a career field, Patricia may be in a state of identity ________. Read the following scenario:Fickle Pharaoh is excited about going to college because he feels that his opportunities will increase. However, due to his variety of interest in many subjects, he cannot decide on a college major. As a result, he has devoted all his spare time to researching many areas of study until he can decide. In regard to career, Pharaoh is in a state of identity _________.
diffusion
moratorium
foreclosure
achievement
The state that Patriacia and Pharao might be when they were commitment to a career field even though they don't know what they want to do in their career path is state of identity moratorium.
What is identity moratorium?An identity moratorium can be regarded as the the process involving finding a sense of oneself.
This is because they are in a period of active searching for themselves and to determine who they really are.
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