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A cell phone battery uses chemistry to create a charge separation between the terminals (anode and cathode). Such a battery is listed as having a capacity of Q = 7E-08 C.
Part (a) How many free electrons does the battery contain, N?
Part (b) If there are 1 million electrons moving through the phone every second how long will the battery last in seconds?
Part (c) Current, I, is given in amps which are coulombs per second. What is the current passing through the phone?
The magnitude of the air resistance that opposes its downward motion is 258 N. Explain what is the magnitude of the acceleration of the rock?
Two children stand on opposite sides of a merry-go-round of diameter 6.0 m, Calculate the magnitude of the Coriolis force acting on the moving ball due to the rotation of the merry-go-round
Two balls undergo a perfectly elastic head-on collision, with one ball initially at rest. If incoming ball has a speed of 200 m/s. What is the final speed of the incoming ball if it is much more massive than stationary ball.
To fight a fire on the fourth floor of a building, firefighters want to use a hose of diameter 6.31cm to shoot 925 liters/minute of water to a height of 11m, What pressure must the water have inside the hose
A dolphin in seawater at a temperature of 25 °C makes a chirp. How much time passes before it hears an echo from the bottom of the ocean, 208 m below.
Xu is a new material discovered by a TA. The specific heat C and latent heat L of Xu are measured by heating up a piece of Xu sample. The temperature T (in K) of Xu sample varying as a function of heat Q (in 103 J) transferred to it.
If the heavier fragment lands back at the equal point from which the shell was launched, where will lighter fragment land and how much energy was released in the explosion.
What is the free-fall acceleration toward the sun at the distance of the earth's orbit? [The mean distance the earth is from the sun in its orbit is 1.50x10^11 m
A toy train is pushed forward and released at xi = 1.60 m with a speed of 2.60 m/s. It rolls at a steady speed for 1.30 s, and then one wheel begins to stick. The train comes to a stop 6m from its starting point. What is the train's acceleration a..
An engine absorbs 1.67 kJ from a hot reservoir at 277°C and expels 1.18 kJ to a cold reservoir at 27°C in each cycle, How much work is done by the engine in each cycle
Two point charges are separated by d= 10 cm and have charges of q1= +2(mu)C and q2= -2 (mu)C, respectively, What is the magnitude of the electric force between the two charges
Two moles of an ideal gas undergo a reversible isothermal expansion from 3.25×10-2 to 4.59×10-2 at a temperature of 21.7. what change of entrophy delta s of the gas.
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