Many houses have an electricity meter that is read so that the cost of the electricity used by the customer can be calculated. What does the electric meter record?
charge
energy used
power
current
The lengths of mercury thread in the stem of a mercury thermometer are given in three situations. length in melting ice = 20 mm length in steam above boiling water = 170 mm length in liquid X = 50 mm What is the temperature of liquid X in degrees centigrade?
40 degree C
30 degree C
20 degree C
10 degree C
What is emitted by the hot metal filament in a cathode ray tube?
protons
neutrons
electrons
x-rays
An object A of mass 2kg is moving with a velocity of 3m/s and collides head on with an object B of mass 1kg in the opposite direction with a velicity of 4m/s. after collision both objects stick, so that they move with a common velocity (v). Calculate v?
2/3 m/s
1/3 m/s
4/3 m/s
5/3 m/s
Which material is the best absorber of infra-red radiation?
white paper
dark anumal fur
shiny metal
window glass
What causes a moving body to resist a change in its state of motion?
acceleration
velocity
displacement
inertia
• Man Wrinkle spent one-fourth of his life as a boy, one-eighth as a youth, and one-half as an active man. If Man Wrinkle spent 12 years as an old man, then how many years did he spend as an active man?
48
96
24
32
• Mr. Brown has 6 black gloves and 12 brown gloves in his closet. He blindly picks up some gloves from the closet. What is the minimum number of gloves Mr. Brown will have to pick to be certain to find a pair of gloves of the same color?
7
3
13
9
Suppose 8 monkeys take 8 minutes to eat 8 bananas How many monkeys would it take to eat 80 bananas in 80 minutes?
8
10
80
1
A 30" x 30" square metal plate needs to be fixed by a carpenter on to a wooden board. The carpenter uses nails all along the edges of the square such that there are 31 nails on each side of the square. Each nail is at the same distance from the neighboring nails. How many nails does the carpenter use?
124
118
116
120