An astronaut standing on the surface of Ceres, the largest asteroid, drops a rock from a height of 10m. It takes 8.06s to hit the ground. Calculate the acceleration of gravity on Ceres. Find the mass of Ceres, given the radius is 510km. Calculate the gravitational acceleration 50km from the surface of Ceres.

a. Calculate the acceleration of gravity on Ceres.

b. Find the mass of Ceres, given the radius is 510km.

c. Calculate the gravitational acceleration 50km from the surface of Ceres

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A fixed 17.1-cmcm-diameter wire coil is perpendicular to a magnetic field 0.70 TT pointing up. In 0.16 ss , the field is changed to 0.34 TT pointing down. What is the average induced emf in the coil?

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Newton said that objects continue moving if no forces are acting on them, but his predecessor Aristotle said that a force was necessary to keep an object moving. Why does Aristotle’s theory seem more plausible, even though we now believe it to be wrong? What insight was Aristotle missing about the reason why things seem to slow down naturally? Give an example

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**11. Six 2-ohm resistors are placed in series and
connected across a 12-volt battery’s terminals. The voltage I
cannot easily obtain from this system is**

**(a) 3V**

**(b) 6V**

**(c) 9V**

**(d) 12V**

Two 2 microfarad capacitors are connected in series and the combination placed across the terminals of a 12 V battery. What charge will appear on their positive plates?

(a) 1 μC

(b) 2 μC

(c) 4 μC

(d) 12 μC

Can someone explain these questions

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The picture tube in an old black-and-white television uses magnetic deflection coils rather than electric deflection plates. Suppose an electron beam is accelerated through a 54.0-kV potential difference and then through a region of uniform magnetic field 1.00 cm wide. The screen is located 10.2 cm from the center of the coils and is 48.6 cm wide. When the field is turned off, the electron beam hits the center of the screen. Ignoring relativistic corrections, what field magnitude is necessary to deflect the beam to the side of the screen?

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An electron with a speed of 1.3 ×106m/s collides with an atom of element X. Shortly afterward, the atom emits a 1240 nm photon. What was the electron's speed after the collision? Assume that, because the atom is so much more massive than the electron, the recoil of the atom is negligible. Hint: The energy of the photon is not the energy transferred to the atom in the collision.

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Question 2: (2pts) Prediction of Gravitational, Kinetic and Total energy for a bouncing ball. Based on your predictions of position and velocity vs time, explain how the energy changes during the motion of the ball. (a) Where on your position vs. time graph is the Gravitational Potential Energy at a maximum during each bounce? Where is it a minimum? What is the velocity when the gravitational potential energy is maximum? What about when the gravitational potential energy is minimum? Explain your reasoning below. (b) Where on your velocity vs time graph is the Kinetic Energy at a maximum? Where is it a minimum? What is the vertical position of the ball when the kinetic energy is a maximum? What is the vertical position when the kinetic energy is a minimum? Explain your reasoning below.

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2.0 kg of solid gold (Au) at an initial temperature of 1000 K is
allowed to exchange heat with 1.5 kg of *liquid* gold at an
initial temperature at 1336 K. The solid and liquid can only
exchange heat with each other. When the two reach thermal
equilibrium will the mixture be entirely solid, or will they be in
a mixed solid/liquid phase? *Explain how you know*

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2 blocks slide towards each other on a frictionless horizontal surface. Block A slides from left to right at a speed of 3m/s. It's mass is 2kg. Block B slides from right to left at a speed of 5 m/s. It's mass is 1 kg. They stick together upon collision.

1. Find the change of momentum of block A.

2. Find the change in momentum of block B.

3. Find the change in kinetic energy of the 2 block system due to the collision.

4. Find the final velocity of the blocks after collision.

5. If the time required for the collision to occure is 5 milliseconds, Find the average force exerted during the collision on block A.

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A mass spectrometer is used to examine the isotopes of uranium.
Ions in the beam emerge from the velocity selector at a speed of
3.08 ✕ 10^{5} m/s and enter a uniform magnetic field of
0.590 T directed perpendicularly to the velocity of the ions. What
is the distance between the impact points formed on the
photographic plate by singly charged ions of ^{235}U and
^{238}U?

cm

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This is one problem. To clarify its one problem that has 2 different questions. My teacher just broke it up with each problem having different numbers to make it more annoying than the problem already is. Thank you so much for taking the time to help me out. (it's asking for the time taken because the units are meters/second

A chimney (length 13.2 m, mass 178 kg] cracks at the base and topples. Assume: - the chimney behaves like a thin rod, and does not break apart as it falls. - only gravity (no friction) acts on the chimney as it falls. - the bottom of the chimney pivots, but does not move.

-Find the linear speed of the center of mass of the chimney, in m/s, just as it hits the ground

A chimney (length 20.9 m, mass 712 kg] cracks at the base and
topples. ** Assume**: the chimney
behaves like a thin rod, and does not break apart as it falls. only
gravity (no friction) acts on the chimney as it falls. the bottom
of the chimney pivots, but does not move.

-Find the linear speed of the very top of the chimney, in m/s, just as it hits the ground.

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Pedro and Joanna decide to try a problem.

A baseball is thrown from the top of a tall building with an
initial velocity of 10 m/s from a height of *h* = 10.5 m
above the ground.

Find its speed when it reaches the ground if its launch angle
is

7°.

Find its speed if it is launched horizontally.

*v*_{f} = m/s

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A projectile is fired from ground level at an angle of 63 degree above the horizontal with an initial speed of 30 m/s .

What is the magnitude of its instantaneous velocity the moment before it hits the ground?

Express your answer in meters per second to two significant figures.

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Water is flowing at 4.00m/s in a 12.00mm diameter pipe under a pressure of 2.000*10^4 N.m^2 in the basement is part of a closed system. What is pressure and speed of the water in a 7.00mm diameter pipe at the top of the 40.0m building? As clearly as possible please!

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There is a satellite of mass m in an orbit radius R about a planet with mass M.

a. What is the sum of the kinetic energy and the gravitational potential energy of the satellite?

b. What is the energy required for the satellite to escape the planet's gravity?

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