1. What is the magnitude of the average gravitational force between the Sun and Mercury?
2. What is the magnitude of the average gravitational force between the Sun and Mercury if the orbital radius of Mercury was doubled?

(you will have to look up Newton's Universal Law of Gravitation and some values of mass and distance) and please list them with the solution.

Please answer in scientific notation and round to three significant figures.

Who pushed the Montreal Protocol on Substance that Deplete the Ozone into prominence?

During which phase(s) of the Moon is it possible to observe the Moon rising after Sunset but before Midnight

The point charges in the figure below have the following values: q₁ = +2.8

Jason takes off across level water on his jet ski. The combined mass of Jason and the ski is 80.0Kg. The ski has a thrust of 250.0N and a coefficient of kinetic friction with the water of 0.100. If Jason forgot to check his gas tank and runs out of fuel in 90.0s : a) what is his acceleration during the first 90 sec? b) what is his maximum speed? c) how far did he travel before he ran out of fuel? d) What is his acceleration after he runs out of fuel?

describe magnetic inductance and give examples.

describe R-L, L-C, and L-R-C series circuits, and give examples.

not by hand please and type it by the keyboard.

do not copy others work from chegg.

Thanks

The figure shows two masses connected by a cord passing over a pulley of radius R₀ and moment of inertia I. Mass M₁slides on a frictionless surface, and M₂ hangs freely.

(a) Determine a formula for the angular momentum of the system about the pulley axis, as a function of the speed v of mass M₁ or M₂. (Use R0 for R₀, M1 for M₁, M2 for M₂, I,v and g for gravity, as necessary.)

(b) Determine a formula for the acceleration of the masses.

a ball is thrown vertically upward with a speed of 25m/s, a) how high does it rise. B) how long does it take to reach its highest point? C) how lnong does the ball take to hit the ground after it reachest highest point? D) what is the velocity when its returned to the level from which it started?

For point charge -9.6 µC and point charge 5.3 µC located at the same positions as in the previous question (5 m and 4 m, respectively), determine the direction of the net electric field E at the origin. 1µC = 10-6C Your answer should be an integer, do not include the unit.

Are nuclear reactors safe?
• Discuss the pros and cons of the fission, breeder, and fusion reactors.

• Are you in favor of any form of nuclear energy? Defend your answer.

Chad got a new unpaid internship working in a coal mine pushing minecarts. All his minecarts

are loaded to weigh 340 kg.

(a) He first pushes a cart from rest on a frictionless section of track with a constant force of 300 N

for a distance of 10 m. How much work does he do on the cart? In what form is this energy?

What is the final speed of the cart?

(b) Then, starting from rest, he pushes another cart with the same 300 N a distance of 10 m up

a frictionless 5 degree slope (pushing in the parallel-to-surface direction). How much work

does he do on the cart? How much of this energy is in what forms?

(c) Now he pushes a cart from rest with force 300 N a distance of 10 m on a flat surface with

μs = μk = 0.05. How much work does he do on the cart? How much of this energy is in what

forms?

A: Three forces act on a moving object. One force has a magnitude of 86.0 N and is directed due north. Another has a magnitude of 64.5 N and is directed due west. What must be the magnitude and direction of the third force, such that the object continues to move with a constant velocity?

B: A worker stands still on a roof sloped at an angle of 39.1° above the horizontal. He is prevented from slipping by a static frictional force of 372 N. Find the mass of the worker.

An open container holds ice of mass 0.545 kg at a temperature of -19.4 ∘C . The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 850 J/minute .

The specific heat of ice to is 2100 J/kg⋅K and the heat of fusion for ice is 334×103J/kg.

(A) How much time tmelts passes before the ice starts to melt? answer in minutes

(B) From the time when the heating begins, how much time trise does it take before the temperature begins to rise above 0∘C? answer in minutes

Suppose two plates lie in parallel horizontal planes, one plate in the xy plane at  z = 0 and the other plate in the plane that is parallel to the xy plane at z = 10 mm. Between the plates is a constant electric field directed vertically upward (that is, in the positive z direction). A proton and an electron are launched in the positive x direction with the same initial velocity from position (0, 0, 5.0 mm).

Part A :If the proton strikes a plate at (190 mm , 0, 10 mm), where does the electron strike?

Three bullets are fired simultaneously by three guns aimed toward the center of a circle where they mash into a stationary lump. The angle between the guns is 120°. Two of the bullets have a mass of 4.30 10-3 kg and are fired with a speed of 257 m/s. The third bullet is fired with a speed of 559 m/s and we wish to determine the mass of this bullet in kg