Physics, 06.10.2021 18:40 salmanderabdi12
Solve the following problems: (3pts each)
1. Calculate the power of a car brake that it is capable of doing 40000J of work in 5 s when stopping the car.
2. Kram can lift a 40.0-kg sack of rice at a height of 0.10 m 15 times in 1 minute. What is Kramâs power output?
3. How much work is done in lifting an object that weighs 250N to a height of 4m?
4. How much power is exerted if the 250N object is lifted to a height 4m in 4s?
5. While doing a chin-up, Gina lifts her 45.0-kg body to a height of 0.25 meters in 5 seconds. What is the power delivered by Gina's biceps?
Answers: 3
Physics, 21.06.2019 23:30
Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work
Answers: 1
Physics, 21.06.2019 23:50
The discovery that the universe appears to be expanding led to a widely accepted theory called a.) the big bang theory b.) the doppler effect c.) hubbleâs law d.) solar nebular theory e.) the seyfert theory
Answers: 2
Physics, 22.06.2019 21:10
The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.
Answers: 1
Physics, 22.06.2019 23:40
Consider a u-tube whose arms are open to the atmosphere. now equal volumes of water and light oil (Ď = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and therefore, the liquid levels in the two arms are the same. if the fluid height in each arm is 30 in, determine the gage pressure exerted by the person on the oil by blowing.
Answers: 3
Solve the following problems: (3pts each)
1. Calculate the power of a car brake that it is capable...
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