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Spacecraft I, containing students taking a physics exam, approaches the Earth with a speed of 0.700c (relative to the Earth), while spacecraft II, containing professors proctoring the exam, moves at 0.300c (relative to the Earth) directly toward the students. The professors stop the exam after 80.0 min have passed on their clock.
(a) For what time interval does the exam last as measured by the students?
(b) For what time interval does the exam last as measured by an observer on Earth?
a beam of electron is that through a small hole into vacuum between two parallel plates wich are separated by a
calculate the energy content of 1 kg of natural uranium assuming complete fission. estimate an average energy per
Calculate the capacitance per unit length of an axon of radius 4.5 µm. The membrane acts as an insulator between the conducting fluids inside and outside the neuron
A red laser from the physics lab is marked as producing 632.8-nm light. When light from this laser falls on two closely spaced slits, What is the wavelength of light produced by the pointer
when a parachute opens the air exerts a large drag force on it. this upward force is initially greater than the weight
a balloon rubbed against denim gains a charge of -8.0 microc. whats the electric force between the balloon and the
Find the total number of lines in a 3.0cm -wide diffraction grating whose third-order spectrum has the 660nm hydrogen theta spectral line at an angular position of 41degree celcius.
A circus clown weighs 900 N. The coefficient of static friction between the clown's feet and the ground is 0.4. What is the minimum pulling force that the clown must exert to yank his feet out from under himself
A positive and a negative particles enter magnetic field at the same angle and with the same velocity. How different would be the path of each particle
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. calculate the moon\'s radial acceleration
Here is a demonstration Pascal used to show the importance of a fluid's pressure on the fluid's depth, What was the weight of the water in the tube
A soap film (n = 1.33) is 273nm thick and lies on a glass plate (n = 1.52). Sunlight, whose wavelengths (in vacuum) extend from 380 to 750 nm, travels during the air and strikes the film perpendicularly. For which wavelength in this range does destru..
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