As you watch a star, you see it move 15 degrees across the sky. How long have you been watching it?
A) 1 hour B) 1 minute C) 15 minutes D) 3 hours E) 15 seconds
A
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Which of the following lists the outer planets in order of increasing mass?
A. Uranus, Neptune, Saturn, Jupiter B. Saturn, Jupiter, Uranus, Neptune C. Jupiter, Saturn, Uranus, Neptune D. Jupiter, Saturn, Neptune, Uranus
A jet fighter plane is launched from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2 s. Assuming the acceleration is constant, what is the length of the catapult?
A) 16 m B) 42 m C) 24 m D) 66 m E) 84 m
The atomic bomb that was dropped on Nagasaki in 1945 killed 140,000 people, helping to end World War II on the next day. It released energy equivalent to that of 20,000 tons of TNT explosive
How much mass was converted to energy when this took place? (1000 tons of TNT = 4.3 × 1012 J) Incidentally, modern H-bombs have energy yields 1000 times as much! A) 1 g B) 10 g C) 100 g D) 1 kg E) 10 kg
A sphere of radius 10.0 cm floats in equilibrium partially submerged in water with its lowest point 5.00 cm below the water's surface. (a) What is the buoyant force acting on the sphere? (b) What is the weight of the sphere?
What will be an ideal response?