A hole is punched in a full milk carton, 10 cm below the top. What is the initial velocity of outflow?
a. 1.4 m/s
b. 2.0 m/s
c. 2.8 m/s
d. 3.9 m/s
e. 4.2 m/s
A
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A projectile is projected from the origin with a velocity of 20.0 m/s at an angle of 30.0 degrees above the horizontal. The projectile lands on a roof that is 4.0 m height. What is the distance along the horizontal axis when the projectile hits the roof?
A. 25.8 m B. 22.3 m C. 19.4 m D. 17.5 m E. 15.0 m
Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston. If the molecular mass of nitrogen is 28 u, how many grams of nitrogen are present?
a. 0.14 c. 42 b. 56 d. 112
What is the gravitational force on a 20-kg satellite circling the Earth (radius = 6.4 × 10^6 m, mass = 6.0 × 10^24 kg) with a period of 5.0 h?
a. 88 N b. 55 N c. 36 N d. 98 N e. 18 N
Replacing a wire resistor with another of the same material and length but with three times the diameter will have the effect of changing the resistance by what factor?
a. 1/3 b. 1/9 c. 3 d. 9