Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
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Chapter 7, Problem 30P
. An electric car is being designed to have an average power output of 4,000 W for 2 h before needing to be recharged. (Assume there is no wasted energy.)
(a) How much energy would be stored in the charged batteries?
(b) The batteries operate on 30 V. What would the current be when they are operating at 4,000 W?
(c) To be able to recharge the batteries in 1 h, how much power would have to be supplied to them?
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Two mirrors meet an angle, a, of 105°. A ray of light is incident upon mirror A at an angle, i, of
42°. The ray of light reflects off mirror B and then enters water, as shown below:
Incident
ray at A
Note: This diagram is not to
scale.
a
Air (n = 1.00)
Water (n = 1.34)
1) Determine the angle of refraction of the ray of light in the water.
B
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Chapter 7 Solutions
Inquiry into Physics
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