Starting from rest, a proton falls through a potential difference of 1.2 kV. What speed does it acquire?
What will be an ideal response?
4.8 × 105 m/s
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The escape velocity for a 100-kg object on Earth is about 11 km/s. What is the escape velocity of a 50-kg object on the surface of Earth?
A) 11 km/s B) 22 km/s C) 5.5 km/s D) 44 km/s E) 2.75 km/s
What is the kinetic energy of a 120-cm thin uniform rod with a mass of 450 g that is rotating about its center at 3.60 rad/s?
A) 0.350 J B) 4.20 J C) 0.700 J D) 0.960 J E) 2.10 J
A 50.0-N box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. You observe that at one instant the box is sliding to the right at 1.75 m/s and that it stops in 2.25 s with uniform acceleration
What magnitude force does friction exert on this box? A) 3.97 N B) 8.93 N C) 38.9 N D) 50.0 N E) 490 N
A Type II supernova produces a planetary nebula
Indicate whether the statement is true or false