An object dropped from rest near the Earth's surface will fall how far in the first second

Q-1: An object dropped from rest near the Earth's surface will fall how far in the first second:

1) 4.9 meters
2) 9.8 meters
3) 16.0 meters
4) 32 meters
ANSWER: 1 -- 4.9 METERS

Q-2: To a person standing on shore, an object dropped from the mast of a passing sailboat will trace what path, assuming negligible air resistance. Is it:

1) vertical straight line
2) slanted straight line
3) parabola
4) hyperbola
ANSWER: 3 -- PARABOLA

Q-3:  The energy dissipated when a car hits a tree at 70 miles per hour is ABOUT how much greater than that dissipated at 50 miles per hour?

1) 20 percent
2) 40 percent
3) 70 percent
4) 100 percent
ANSWER: 4 -- 100 PERCENT

Q-4:  What happens to the period of a pendulum if the mass of the bob is quadrupled?

1) it is cut in half
2) it stays the same
3) it is doubled
4) it is quadrupled
ANSWER: 2 -- IT STAYS THE SAME

Q-5:  According to the theory of relativity, people who travel at relativistic velocities and then return home will be:

1) shorter than if they had not made the trip.
2) taller than if they had not made the trip.
3) younger than if they had not made the trip.
4) older than if they had not made the trip.
ANSWER: 3 -- YOUNGER THAN IF THEY HAD NOT MADE THE TRIP.

Q-6: Which of the following units of energy is the smallest:

1) calorie
2) Joule
3) erg
4) electron-volt
ANSWER: 4 -- ELECTRON-VOLT

Q-7: Which of the following quantities has the GREATEST influence on the overall efficiency of a conventional (Rankine cycle) electric generating station burning fossil fuels?

1) steam temperature at the steam turbine inlet
2) net heating value of the fuel
3) steam pressure at the steam turbine inlet
4) pounds of ash and sulfur per pound of fuel
ANSWER: 1 -- STEAM TEMPERATURE AT THE STEAM TURBINE INLET

Q-8:  The index of refraction of a plastic material is 1.5. The speed of light in this material relative to that in a vacuum is:

1) 2
2) 1.5
3) 2/3
4) 1/2
ANSWER: 3 -- 2/3