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1. What is the significance of studying active versus normal galaxies? Explain.
2. Do you think that our galaxy has ever been an active galaxy? Could it have hosted a quasar when it was young?
3. How can collisions affect the shape of galaxies? What evidence can you cite that galactic cannibalism really happens?
a a football player kicks a football in a field goal attempt. when the football reaches its maximum height what is the
The coefficients of static and kinetic friction between a 67 kg box and a horizontal surface are 0.56 and 0.32, respectively. Illustrate what is the acceleration of the object if a 335 N horizontal force is applied to the box?
A car moving with constant acceleration covered the distance between two points 55.2 m apart in 5.37 s. Its speed as it passes the second point was 14.2 m/s. What was the speed at the first point
an ice skater moves without friction on a frozen pond. while traveling at 7.5 ms she finds that it takes 12 s to travel
What is the direction of the electric field at point P and determine the linear charge density. Put your answer in terms of q, L, a, and physical constants.
A solid object is made of two materials, one material having density of 2 000 kg/m3 and the other having density of 6 000 kg/m3. what is its average density
Life scientists use ultracentrifuges to separate biological components or to remove molecules from suspension. Samples in a symmetric array of containers are spun rapidly about a central axis.
A 30-g bullet initially traveling 500 m/s penetrates 12 cm into a wooden block. What average force does it exert on the block
Pluto spins about its axis with a period of approximately 6.39 Earth days. What is the rotational angular speed of Pluto
A car drives along a dual carriageway at 96 km h−1. The driver sees a speed limit sign approaching and applies the brakes to decelerate to a speed of 48 km h−1. Given that the deceleration is 2.68 m s−2 discover the distance over which the brakes are..
A space traveler weighs 535 N on earth. What would the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth.
The press box at a baseball park is 40.0 above the ground. find the horizontal distance from the press box to second base
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