# Physics

(TCO 4) A ball is dropped from a 250 foot building. What is its velocity when it strikes the ground, ignoring any air resistance? (Points : 6)

(TCO 4) A bullet is fired vertically upward with an initial velocity of 250 m/sec. How high does it go? (Points : 6)

(TCO 4) A projectile is fired over level ground with an initial vertical velocity of 20 m/s and an initial horizontal velocity of 30 m/s. Using g = 10 m/s2, the distance from the launching to the landing points is (Points : 6)

(TCO 4) Two spacemen are floating together with zero speed in a gravity-free region of space. The mass of spaceman A is 120 kg, and that of spaceman B is 90 kg. Spaceman A pushes B away from him with B attaining a final speed of 0.5 m/s. The final recoil speed of A is (Points : 6)

(TCO 4) The speed of a body traveling in a straight line with a constant positive acceleration increases linearly with (Points : 6)

(TCO 4) What is the velocity of an airplane that travels 500 km in 2 hours, 17 minutes? (Points : 6)

(TCO 4) A 4.0 kg object moving initially at 5.0 m/s along a straight line on a smooth (frictionless) surface is pulled a distance of 20.0 m by a constant force of 6.0 N acting along the same direction as the initial direction of the object’s motion. The final speed of the object is (Points : 6)

A ball is dropped from a 250 foot building. How long before the ball hits the ground? (Points : 6)

Suppose that while walking in a straight line at a uniform speed, you throw a ball straight up about 2 or 3 m without breaking stride. Where will it land? (Points : 6)

If a block of wood floats in water with two-thirds of its volume submerged, what is the density of the block? (Points : 6)

TCO 4) A hydraulic lift in a garage can lift a 1600 kg vehicle when a 400 N force is applied to the smaller piston of area 10 cm2. The area of the larger piston is (Points : 6)

(TCO 4) The small piston of a hydraulic press has an area of 10.0 cm2. If the applied force is 50.0 N, what is the area of the large piston so that the pressing force is 4800 N? (Points : 6)

Which of the following is the coldest temperature? (Points : 6)

The same amount of heat flows into four different materials. Which substance has the greatest specific heat? (Points : 6)

TCO 4) An ideal gas is heated. If the gas is in a container that prevents its volume from changing, what happens to the pressure? (Points : 6)

TCO 4) In a photoelectric effect experiment above the threshold frequency, the number of electrons ejected is proportional to (Points : 6)

TCO 4) Radio waves are readily diffracted around buildings, whereas light waves are negligibly diffracted around buildings. This is because light waves (Points : 6)

) Virtual images formed by a convex mirror are always (Points : 6

The charge on a glass rod which has been rubbed with silk is called positive (Points : 6

 9. (TCO 4) A magnetic field cannot (Points : 6)

(TCO 4) A square loop of wire lies in the plane of the page as shown. A decreasing magnetic field is directed into the page. The induced current in the loop is

TCO 4) In an overhead straight wire, the current is north. The magnetic field due to this current, at our point of observation, is (Points : 6)

 13. (TCO 4) Which of the following does not determine the resistance of a wire? (Points : 6)

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