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A battery with an emf of 10.5 V and internal resistance of 1.01 Ω carries a positive current of 0.520 A from its negative terminal to its positive terminal. (c) By how much will the chemical energy decrease? (e) At what rate is chemical energy used?
An object with a constant acceleration has velocity of 12 meter per second when its position is x = 8 meter. At another position x = 16 meter, its velocity is 20 m/s. Calculate its acceleration
A train at rest emits a sound at a frequency of 1000 Hz. What is the frequency heard by the observer
A 40-kg pole vaulter running at 14 m/s vaults over the bar. Her speed while she is above the bar is 1m/s. Avoid air resistance, in addition to any energy absorbed by the pole, and determine her altitude as she crosses the bar.
A proton moving freely in a circular path perpendicular to aconstant magnetic field takes 1.00μs to complete onerevolution. What is the magnitude and magnetic field
Two Train cars are on a smooth level track. Car 1 has an initial mass of 10,000 kg and an initial speed of 18 m/s. what is the speed and kinetic energy of the connected cars after the collision
What is the ratio of potential energy to kinetic energy for a comet that has now enough energy to escape from the Sun's gravitational field?
A circular SPACE HOTEL in orbit around the earth has a diameter of 355 m. Find the station's angular velocity under those conditions
A bungee jumper with mass 52.0 kg reaches a speed of 13.5 m/s moving straight down when the elastic cord tied to her feet starts pulling her back up. find the average force that the bungee cord exerts on the jumper
A boy on board a cruise ship drops a 30.0 g marble into the ocean. what is the terminal speed of the marble
A speed boat is moving across the surface of a lake. At t_1=0 with the components of its velocity are V_x= 25 m/s and V_y= -10 m/s. At T_2=15s the components are V_x= 12 m/s and V_y= -21 m/s. What are the components of the average acceleration for th..
A 3.0x10 ² kg piano is being lifted at a steady speed from ground level straight up to an apartment 10 m above the ground. How much time does it take to lift the piano
an ideal monatomic gas is the working substance of a carnot engine. during the isothermal expansion the volume doubles.
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