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The Red Shift is evidence of an expanding Universe. A star like our Sun has a peak wavelength of 518 nm. If the star appeared to have a peak wavelength of 530 nm, find the rate of expansion (velocity) between that star and our Sun.
A 2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. find the speed and direction of the second ball after the collision
q1. a proton moves perpendicular to a uniform magnetic field at a speed of 1.80 x 107 ms and experiences an
For the typical volume charge density I? = -1.1 A? 10-3 C/m3, what is the difference in the electric potential between the pipe's center and its inside wall
A child throws a snowball over a wall. The horizontal distance which the snowball travels is 3.83 m. Determine the initial speed of the snowball
An iron bolt of mass 63.4 g hangs from a string 32.6 cm long. The top end of the string is fixed. Without touching it, the magnet attracts the bolt so that it remains stationary, displaced horizontally 28.5 cm to the right from the before vertical li..
A person fishing from a pier observes that four wave crests pass by in 7.0 s and estimates that the distance between two successive crests is 4.0 m. What is the speed of the wave
A 5.0 kg crate slides down a 60.0 incline with an acceleration of 1.9 m/s2. What is the frictional force between the crate and the incline surface
A large, cold (1.20 C) block of iron is immersed in a tub of hot (99.7C) water. Calculate the change in entropy of the system this time
What is the maximum speed of the ball.
On planet Tehar, the free-fall acceleration is the identical as that on Earth, but there is also a strong downward electric field that is uniform close to the planet's surface.
A curling stone slides on ice with a speed of 2.0 m/s and collides inelastically with an identical,stationary curling stone. What fraction of the initial energy is lost in this collision
Passengers riding in the Great Six Flags Air Racer are spun around a tall steel tower (see the figure). Calculate the speed of the planes
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