physics
Why is this following situation impossible? A normally proportioned adult walks briskly along a straight line in the +x direction, standing straight up and holding his right arm vertical and next to his body so that the arm does not swing. His right hand holds a ball at his si...
physics
please explain steps/thinking thank you!
physics
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a horizontal, cylindrical tube 58 ft long and is represented in the figure below. Assume an astronaut in training sits in a seat at one end, facing the axis of rotation 29.0 ft away. Determ...
physics
jishka won't let me post the website, but when you google the question its the second result.
physics
A crystalline solid consists of atoms stacked up in a repeating lattice structure. The atoms of a crystal reside at the corners of cubes of side L = 0.200 nm. One piece of evidence for the regular arrangement of atoms comes from the flat surfaces along which a crystal separate...
physics
A total of 10000kg of water per second flows over a waterfall 30m high.If half of the power this flow represents could be converted into electricity, how many 100-W lightbulbs could be suplied?
physcis
A crane whose motoer has a power input of 5.0kW lifts a 1200-kg load of bricks through a height 30m in 90s. Find the efficency of the crane which is the ratio between its output power and its input power
English
Sorry, but I'm from Poland and my English isn't very well. I think it's good enough for me. (I'm 15 years old) Thanks for your opinion.
English
Thank you so much!
English
The most complicated journey I've ever had took place a year ago when I was going home with my friend. We even didn't leave Warsaw when the coach broke down. The driver tried to fix it by himself but he didn't manage. It took 30 minutes. We returned to the bus stat...
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