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A distant galaxy is 320 Mly away. Assume that the Hubble constant is 22 km/s per Mly.
What is the speed of the galaxy in m/s?
How long (in seconds) did it take this galaxy to move this distance?
How many years ago was this galaxy on top of the Milky Way? in billion years.
One particle has a mass of 2.00 10-3 kg and a charge of +7 µC. A second particle has a mass of 5.00 10-3 kg and the same charge. Find the initial separation between the particles
Consider an airplane of wing area 6.8 m^2 (both wings combined) flying through air of density 1.13 kg/m^3. What is the net upward lift force on the plane
The gravitational force exerted on a baseball is 2.23 N down. A pitcher throws the ball horizontally with velocity 14.5 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 169 ms. The ball starts from rest.
Two shuffleboard disks of equal mass, one orange and the other green, are involved in a perfectly elastic glancing collision. Determine the final speed of the orange disk
Use the uncertainty principle to estimate the size of an H atom and the energy of the ground state. Then, assuming some radius r, calculate the related uncertainty in momentum p to get the KE. Minimize the total energy to determine r and the ground..
find out the magnitude of the gravitational force exerted.
When Josh begins his discus throwing motion, he spins with an angular velocity of 5 rad/s. Just before he releases the discus, what is Josh's average angular acceleration
Two parallel conductive plates of area 0.3m2 hold equal-but-opposite charges of magnitude 30?C on either side. calculate the electric field between the plates
A diver releases an air bubble of volume 2.0cm3from a depth of 16m below the surface of a lake, What is the volume of the bubble when it reaches just below the surface of the lake
What is the thermal kinetic energy in 1 kg of oxygen gas at 20°C, What fraction of this energy is translational
When the power is turned off on a turntable spinning at 82.0 rpm, you find that it takes 10.8 revolutions for it to stop while slowing down at a uniform rate. How long does it take to stop after the power is turned off
Consider neon, a noble gas whose molecules consist of single atoms of atomic mass 0.02 kg/mol. What is the root-mean-square speed of a neon atom under such conditions
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