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A) A lightweight electric car is powered by ten 12-V batteries. At a speed of 70 km/h, the average frictional force is 1050 N. What must be the power of the electric motor if the car is to travel at a speed of 70 km/h?
B) If each battery can deliver a total charge of 180 Ah before recharging, what is the total charge in coulombs that can be delivered by the ten batteries before recharging?
C) What is the total electric energy delivered by the ten batteries before recharging?
D) How far can the car travel at 70 km/h before the batteries must be recharged?
E) What is the cost per kilometer if the cost of recharging the batteries is 9 cents per kilowatt-hour? (Give your answer in cents. Don't give units)
Derive the magnitude of the angular momentum vector of the electron in the ground state in tritium.
In the reference frame of the laboratory, a particle moves in the x-y plane with a velocity of 0.7c at an angle of 40 degrees with the x-axis. Find the velocity (magnitude and direction) of this particle
Supply a small island (population of 1 million, some industry, some military) with electrical power. How many power plants would you need
A jogger runs 100m due east, then changes direction for the second leg of the run. At the end of the run, she is 350m away from the starting point at an angle of 25.0° north of east. What were the direction and length of her second displacement? Util..
Radioactive isotopes often occur together in mixtures. assume a 480 sample contains , with a half-life of 12 days, and , with a half-life of 4.5 days.
The Fermi energy of silver at 300 K is 5.48 eV. What is the average energy of a conduction electron in silver at 300 K
A 57-kg pole vaulter running at 1.1 m/s vaults over the bar. Her speed while she is above the bar is 1.0 m/s. Avoid air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
what are the two steps for simplifying radicals? can either step be deleted? if you could add a step that might make it
An inkjet printer uses tiny dots of red, green, and blue ink to produce an image. what is the maximum allowable dot separation
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.641 rev/s. What is the final angular speed of the merry-go-round
An iron bolt is used to connect two iron plates together. The bolt must withstand shear forces up to about 3150 N. Calculate the minimum diameter for the bolt
A 10m long conductor is formed into a circle in the xy-plane. Find the magnetic flux through the looped conductor
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