Physics

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A voltage V is applied to the primary coil of a step-up transformer with a 3:1 ratio of turns ... Started by elizabeth18	1 Replies 188 Views	Jul 27, 2018 by brittrenee
Why can't the carbon dioxide cycle easily correct for the increasing amounts of carbon dioxide ... Started by LCritchfi	3 Replies 380 Views	Jul 27, 2018 by upturnedfurball
Light which reflects off a pond of water undergoes a phase shift of A) 90. B) 180. C) 0. D) ... Started by Wadzanai	1 Replies 109 Views	Jul 27, 2018 by tmlewis4706
An electron has a wavelength of 0.123 nm. What is its energy in eV? A) 80. keV B) 20. keV C) ... Started by elizabeth18	1 Replies 68 Views	Jul 27, 2018 by jordangronback
The secondary coil of a neon sign transformer provides 7500. V at 0.010 A. The primary coil operates ... Started by hubes95	1 Replies 119 Views	Jul 27, 2018 by jrpg123456
An electron slowing from 0.998c to 0.500c loses how much momentum? (express the answer in MeV/c as ... Started by kwoodring	3 Replies 107 Views	Jul 27, 2018 by zogaridan
The fastest we could accelerate a vehicle powered with an ion engine to is approximately A) 1 of ... Started by haleyc112	1 Replies 133 Views	Jul 27, 2018 by juiceman1987
Consider the Bohr Theory Hydrogen atom in the 2nd excited state. (a) Determine the binding energy ... Started by Coya19@aol.com	1 Replies 101 Views	Jul 27, 2018 by sarahccccc
Which type of spacecraft does NOT need to carry any fuel? A) nuclear rockets B) ion engines ... Started by dejastew	1 Replies 183 Views	Jul 27, 2018 by vkodali
Bohr's atomic theory predicted energy levels for hydrogen of En = (2 2 k2 e4m)/(hn)2. If instead we ... Started by future617RT	3 Replies 84 Views	Jul 27, 2018 by Edwyer
In order for a solar sail spacecraft to be accelerated to speeds high enough to accomplish ... Started by Zoey63294	1 Replies 93 Views	Jul 27, 2018 by cloudre37
During the past few million years, ice ages were MOST LIKELY caused by A) changes in the distance ... Started by scienceeasy	1 Replies 61 Views	Jul 27, 2018 by jesse.fleming
Which of the following binoculars would be best for observing very faint comets among the stars? ... Started by Sportsfan2111	1 Replies 68 Views	Jul 27, 2018 by memslove
The ultimate speed of a solar-sail-propelled spacecraft is limited by the A) low energy photons ... Started by anshika	3 Replies 90 Views	Jul 27, 2018 by Pariscourtney
A mirror with a focal length -25 cm has a 4.0 cm tall object placed 100 cm in front of it. What is ... Started by nenivikky	1 Replies 128 Views	Jul 27, 2018 by abctaiwan
What is the surface temperature of a star, given that its radiation peak occurs at a frequency of ... Started by itsmyluck	1 Replies 106 Views	Jul 27, 2018 by jennafosdick
Severe, long-term cooling periods during the Earth's history are known as A) snowball Earth B) ... Started by swpotter12	1 Replies 122 Views	Jul 27, 2018 by jliusyl
At what frequency does an object with a temperature of 1000 K radiate the most power? A) 1.0 ... Started by bucstennis@aim.com	3 Replies 94 Views	Jul 27, 2018 by Ksh22
The focal length of the objective of a telescope is 75.0 cm. While the eyepiece has a focal length ... Started by ashley	1 Replies 111 Views	Jul 27, 2018 by Dinolord
A diver can change her rate of rotation in the air by tucking her head in and bending her knees. ... Started by Capo	1 Replies 70 Views	Jul 27, 2018 by marict
Within the last two and a half billion years, how many snowball Earth events have occurred? A) ... Started by B	1 Replies 74 Views	Jul 27, 2018 by bdobbins
If the visible wavelengths of light range from 400 nm to 750 nm, what is the highest frequency ... Started by Mr. Wonderful	3 Replies 111 Views	Jul 27, 2018 by cupcake16
How far from a lens of focal length 50.0 mm must the object be placed if it is to form a virtual ... Started by jrubin	1 Replies 46 Views	Jul 27, 2018 by juliaf
The observed slowing down of time predicted by Einstein's Special Theory of Relativity for an object ... Started by debasdf	1 Replies 106 Views	Jul 27, 2018 by Mochi
A 4.0 cm tall object is placed 50 cm away from a converging lens of focal length 25 cm. What is the ... Started by debasdf	1 Replies 128 Views	Jul 27, 2018 by kxciann