Some galaxy clusters are still growing today
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A bicycle is traveling north at 5.0 m/s. The mass of the wheel, 2.0 kg, is uniformly distributed along the rim, which has a radius of 20 cm. What are the magnitude and direction of the angular momentum of the wheel about its axle?
A) 2.0 kg • m2/s towards the west B) 5.0 kg • m2/s vertically upwards C) 2.0 kg • m2/s towards the east D) 5.0 kg • m2/s towards the east E) 5.0 kg • m2/s towards the west
Which of the following quantities, if any, remain constant as a projectile moves through its parabolic trajectory?
(i) speed (ii) acceleration (iii) the horizontal component of velocity (iv) the vertical component of velocity
1.(i) only 2.(ii) and (iii) 3.(ii) and (iv) 4.all of themHow much heat (in kcal) must be removed to make ice at ?10°C from 2 kg of water at 20°C? (The specific heat of ice is 0.50 cal/g?°C.)
A. 190 B. 200 C. 240 D. 210 E. 50
Main sequence stars lie at the top right corner of the H-R diagram
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