What is the angle of incidence of light beam

Question

Assignment:

QUESTION 1. Resonance occurs when two different objects vibrate

A. with different frequencies

B. with the same frequencies

C. with high frequencies

D. with low frequencies
 
QUESTION 2 A beam of light is reflected off a plane mirror at an angle of 50° relative to the surface. What is the angle of incidence of this light beam?

A. 50°

B. 30°

C. 40°

D. 0°
 
QUESTION 3. Which of the following has the greatest linear momentum?

A. a 3 kg mass moving at 4 m/s

B. a 500 gram mass moving at 80 m/s

C. a 1000 kg mass at rest

D. a 30 kg mass moving at 1.5 m/s
 
QUESTION 4 What is the total charge of 3 protons and one electron?

A. 4.8 x 10^-19C

B. -1.6 x 10^-19

C. 1.6 x 10^-19

D. 3.2 x 10^-19C
 
QUESTION 5 Which one of the following is the MKS (SI) unit for both work and energy?

A. kW

B. erg

C. Coulomb

D. Joule
 
QUESTION 6 Put given number 0.0031 in scientific notation

A. 3.1x10^-2

B. 3.1x10^-3

C. 3.1x10³

D. 3.1x10²
 
QUESTION 7 The heat required to change 1.50 kg of water at initial temperature of 400C into steam at 1000C is

A. 810 kcal

B. 90 kcal

C. 750 kcal

D. 900 kcal
 
QUESTION 8 An object in uniform circular motion has

A. constant acceleration

B. variable radial distances

C. constant velocity

D. constant speed
 
QUESTION 9 The heating element of an iron has a resistance of 11 Ohms. How much power is consumed by the iron when it is operating at 110 Volts?

A. 99 W

B. 1.1 kW

C. 1.2 kW

D. 10 W
 
QUESTION 10 A change in velocity

A. implies no acceleration

B. results from a zero net force

C. results from inertia

D. requires an unbalanced force
 
QUESTION 11 A vector is a physical quantity that has ________________ and ___________________

A. a number, direction

B. number, unit of measurement

C. direction, unit of measurement

D. magnitude and direction
 
QUESTION 12 A sled and rider with a combined mass of 75 kg slide down from the top of a hill 20 m high. What is their kinetic energy as they reach the bottom of the hill?

A. 1.5 x 10⁴ J

B. 490 J

C. 1.47 x 10³ J

D. 9.8 x 10⁴ J
 
QUESTION 13 The unbalanced horizontal net force on a truck of mass 1500 kg moving along a straight horizontal line at a uniform speed of 25 m/s is:

A. 14,700 N

B. 37,500 N

C. 0 N

D. 3,304 lb
 
QUESTION 14 Which one of the following sound frequencies is in the range of human hearing?

A. 7 Hz

B. 700 Hz

C. 14 Hz

D. 70,000 Hz
 
QUESTION 15 A ball is dropped from a height of 60 m on the Earth. How long does it take for the ball to hit the ground?

A. 3.5 ms

B. 12.2 s

C. 3.3 ms

D. 3.5 s
 
QUESTION 16 The density of ice is 0.920 g/cm3. Find the mass in kilograms of a cube of ice whose side is 9.00 cm long?

A. 0.115 kg

B. 9.80 lb

C. 0.671 kg

D. 1.78 lb