Physics

Physics, 24.06.2019 07:00, bbb4951

How much power is expended on a 20-n rock that you lift 1.5 meters up in 10 seconds?

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Physics, 10.07.2019 01:30, babbygirl8597

2. joe runs up the stadium steps as an athletic drill. there are 50 steps and each one is 0.30 meters high and 0.50 meters deep. if joe has a mass of 95 kg and runs the steps in 30 seconds, how much work has he done and how much power has he dissipated? 3. a 950 kg car accelerates from 0 m/s to 25 m/s in 5.0 seconds. how much power does that require? 4. a pulley system is used to lift a 4500 n weight using a 900 n force. if the mass moves 1.0m while the pulley is pulled 6.0m, what is the efficiency of the machine? 5. a lever is used to lift a car engine that weighs 2200 n a distance of 1.0 meters. to accomplish this, a 550 n force is applied over a distance of 5.0 m. what is the efficiency of this machine?

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Mathematics, 20.08.2019 16:10, Sshadøw

An astronaut drops a rock off the edge of a cliff on the moon. the distance, d(t), in meters, the rock travels after t seconds can be modeled by the function d(t) = 0.8t^2. what is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped? (1) 12 (3) 60 (2) 20 (4) 80

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Physics, 31.08.2019 07:20, ashlpiriz123

How much power is expended if you lift a 60 n crate 10 meters in 1 second? a. 0 w b. 6 w c. 10 w d. 60 w e. 600 w?

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Chemistry, 26.09.2019 00:00, durham953

can lift the 403,342 ton pioneering spirit crane vessel 10 meters in 30 seconds as if it was a cork. this about 36 gj of work and 1gw of power. it’s a lot. 2. waves carry in 2014, the newest generation of optical fibers use light waves to transmit an entire terabyte hard drive in 0.2 seconds 3. in my life jacket, i was raised up 10 meters (33 feet) to the top of the wave and could see a rescue ship in the distance. 4. in between crests, i was at the bottom of the between waves and all i could see was towering walls of water all around me. 5. i estimated the distance between wave crests was 30 meters. the was 30 meters. 6. i used my watch and timed that i went from crest to crest 10 times in 50 seconds. the of the waves was 0.2 hz (10 waves / 50 seconds = 0.2 waves per second) 7. i estimated the of the waves was 10 meters. which means from the crest to the trough i was falling 20 meters (66 feet). the thought made me nauseated. 8. i used my watch and timed that i went from crest to crest 10 times in 50 seconds. the was 5 seconds. (50 seconds for 10 waves / 10 waves = 5 seconds.) 9. i estimated the distance between waves was 30 meters. and i had timed that the period was 5 seconds. the waves had a of 6 m/s. ( 30 m/5 seconds = 6 m/s) 10. is a metric prefix, symbolized as a lower case m. it appears before the unit of measure. it is 1000 times smaller than the base unit (no prefix). 1000 munits = 1 unit. 1 munit = 0.001 unit

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