Physics, 12.01.2021 21:30 keniaguevara32
If an object's velocity changes from 25 meters per second to
15 meters per second in 2.0 seconds, the magnitude of the
object's acceleration is
A 5.0 m/s2
B 7.5 m/s2
C 13 m/s2
D 20 m/s2
Answers: 3
Physics, 22.06.2019 18:50
What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.
Answers: 2
Physics, 22.06.2019 19:50
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
If an object's velocity changes from 25 meters per second to
15 meters per second in 2.0 seconds, t...
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