I need help with a physics problem?

An electron in a cathode-ray tube accelerates uniformly from 2.00x10^4 m/s to 6.00x10^6 m/s over 1.50 cm. (a) In what time interval does the electron travel this 1.50 cm? (b) What is its acceleration?

leonpan

over 13 years ago

Advanced Physics

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Physics Problem need help !?

"A physics professor did daredevil stunts in his spare time. His last stunt was an attempt to jump across a river on a motorcycle. (See the figure.) The takeoff ramp was inclined at 50.0 degress, the river was L= 37.0m wide, and the far bank was d = 19.0m lower than the top of the ramp. The river itself was H = 98.0m below the ramp. a. what should his speed have been at the top of the ramp for him to have just made it to the edge of the bank ? b. if his speed was only half the value found in part a, where did he land? can you please help me approach this problem and help me answer it. I don't know where to start"

goldr4k3

over 13 years ago

Advanced Physics

Serious Need of Physics Help?

"So right now we are doing Ohm's Law and I am unsure how to solve problems that involve cost. If someone could just thoroughly explain this problem please: How much does it cost to watch a complete 22 h long World Series on a 516 W television set? Assume that electricity costs $0.07/kW · h. Answer in units of cents"

myfuture

over 13 years ago

Advanced Physics

I need help with Physics homework?help please?

A 50 kilogram diver falls freely from a height of 10 meters above the water. When she is 1 meter above the water, what is her gravitational potential energy?

rajeshi

over 13 years ago

Physics

I need help with Physics homework?

A person exerted an average force of 125 newtons over a distance of 14.0 meters as he lifted a machine with the compound pulley. The machine weighs 750 newtons and rose a distance of 2 meters. How much work did the person do against friction while lifting?

explain

over 13 years ago

Physics

Need help with standing wave physics!?

"A standing wave pattern on a string is described by y(x,t) = 0.040 sin(3πx) cos(60πt), What are the first three times (in ascending order) for 0 ≤ t ≤ 0.04 s when all the particles on the string have zero speed?"

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