Q-1;  The gravitational constant for the universe was measured by which of the following?

1) Kepler
2) Einstein
3) Newton
4) Cavendish
ANSWER: 4 -- CAVENDISH

Q-2;If you start with 24 grams of a radioactive element with a half-life of one month, how many grams of the radioactive element will be left after 2 months?

1) 1.5 grams
2) 3 grams
3) 6 grams
4) 12 grams
ANSWER: 3 -- 6 GRAMS

Q-2; How many colors of quarks are believed to exist? Is it:

1) 1
2) 3
3) 5
4) 7
ANSWER: 2 -- 3

Q-3; A train is traveling 20 kilometers per hour. It is .5 kilometers behind you. You want to beat the train to a crossing that is .5 kilometers away. How fast must you run?

ANSWER: 10 KILOMETERS PER HOUR

Q-4; A child weighing 50 Newtons is on a swing. He goes from a minimum height of 0.2 meters to a maximum height of 1.5 meters. His maximum speed is closest to:

1) 3 meters per second
2) 5 meters per second
3) 7 meters per second
4) 9 meters per second
ANSWER: 2 -- 5 METERS PER SECOND

Q-5; A train locomotive whose mass is 1 x 106 kilograms is traveling EAST at a speed of 100 kilometers per hour. A NORTHERLY wind is applying a force of 100 Newtons on the locomotive. How much work is the wind doing on the locomotive for each 10 meters it travels?

1) 0 joules
2) 1,000 joules
3) 10,000 joules
4) 100,000 joules
ANSWER: 1 -- 0 JOULES

Q-6; The density of seawater is greater than that of fresh water. A boat will float:

1) Higher in fresh water than in seawater
2) Lower in fresh water than in seawater
3) At the same level in both
4) Any of the above, depending upon its shape
ANSWER: 2 -- LOWER IN FRESH WATER THAN IN SEAWATER

Q-7; How many times more intense is an 80 decibel sound than a 40 decibel sound?

1) 2
2) 40
3) 1000
4) 10,000
ANSWER: 4 -- 10,000

Q-8; The coefficient of linear expansion of steel is 1.2 x 10-5/ oC. (read: 1 point 2 times 10 to the minus 5 per degree Celsius). What is the increase in length of a steel girder that is 20 meters long at 10o C when its temperature is raised to 20o C?

ANSWER: 2.4 MILLIMETERS (accept 0.0024 meters or 2.4 x 10-3 meters)