Kinetic Energy of a Rotating Wheel A simple wheel has the form of a solid cylinder of radius r with a mass m uniformly distributed throughout its volume. The wheel is pivoted on a stationary axle through the axis of the cylinder and rotates about the axle at a constant angular speed. The wheel rotates n full revolutions in a time interval t. Part A What is the kinetic energy K of the rotating wheel? Express your answer in terms of m, r, n, t, and • View Available Hint(s) K =

Pls help ASAP. Pls show all work and circle the final answers pls.

You drop a ball from a height of 1.8 m , and it bounces back to a height of 1.2 m Part C What is the ball's speed just after the bounce? Express your answer to two significant figures and include the appropriate units. HA ? Vafter = Value Units Submit Request Answer Part D Where did the energy go? O The energy "lost" was changed primarily into thermal energy due to friction. O The energy "lost" was changed primarily into heat energy. The energy "lost" was changed primarily into acoustic energy. O The energy "lost" was changed primarily into chemical energy.

Can a dot product ever be negative? Yes No   SubmitPrevious Answers  Correct Part B If yes, under what conditions? One of the vectors has negative length. The angle between two vectors is greater than 90 ∘∘. The angle between two vectors is less than 90 ∘∘.

A rocket with mass 7.00×103 kgkg is in a circular orbit of radius 7.50×106 mm around the earth. The rocket's engines fire for a period of time to increase that radius to 8.80×106 mm, with the orbit again circular.     Part A What is the change in the rocket's kinetic energy? Does the kinetic energy increase or decrease? Express your answer with the appropriate units. Enter positive value if the kinetic energy increases and negative value if the kinetic energy decreases.       ΔKΔK = nothingnothing   SubmitRequest Answer Part B What is the change in the rocket's gravitational potential energy? Does the potential energy increase or decrease? Express your answer with the appropriate units. Enter positive value if the gravitational potential energy increases and negative value if the gravitational potential energy decreases.       ΔUΔU = nothingnothing   SubmitRequest Answer Part C How much work…

What's the answer for all the parts?

A smal, dosely wound col has N tuns, area A, and resistance R. The col is intaly in a unform magnetic feld that has magnitude B and a drection perpendicular to the plane of the loop. The collisthen rapidly pulled out of the field so that the flux through the collis reduced to zero in time At. Part A What are the magnitude of the average emf E, and average curent I, induced in the col? Express your answer in terms of the variables N, A, R, B. and At. AZ + * O O ? E, Iy= • Part B The total charge Qthat fows though the col is given by Q= IavAt. Derive an expression for Q in terms of N, A, B, and R Note that Q does not depend on At. Express your answer in terms of the variables N, A, R, and B. ? Q=

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Let the gravitational potential energy of the earth-satellite system be zero in the limit that the orbit radius is very Gm m large, so the total mechanical energy of the satellite-earth system is given by B = Part A If the kinetic energy of the satellite is 2.00 x 10° J, what is the total energy of the satellite--earth system? Express your answer with the appropriate units. Template Undo redo Teset keyboard shortcuts Help Units Request Answer Part B If the kinetic energy of the satellite is 2.00 x 10° J, what is the gravitational potential energy of the satellite-earth system? Express your answer with the appropriate units. Tamplator Templates Symbols Undo rapo Peser keyboard shortcuts Help E= Submit U= Submit Value Value Request Answer Units