Potential Energy
mass
height
1.23 kg
3.4 m
98.61 Joules
4.3 m
1...
Physics, 23.10.2020 06:01 odelancy14
Potential Energy
mass
height
1.23 kg
3.4 m
98.61 Joules
4.3 m
150.45 Joules
3.45 kg
202.94 Joules
6.2 kg
7.1 kg
3.56 m
what is potential energy if his mass is 1.23 kg and his height is 3.4 kg?
Answers: 3
Physics, 22.06.2019 07:00, marlenemedina247
World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s
Answers: 2
Physics, 22.06.2019 19:50, fili20
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
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