A ball thrown upwards reaches a maximum height and then comes back down to the original level. As the ball is going downwards the velocity and acceleration both point down.
Indicate whether the statement is true or false
[Ques. 2] What determines how much light bends when it enters a transparent material?
a. The angle of incidence of the light alone determines the bending.
b. The index of refraction alone determines the bending.
c. The type of material alone determines the bending.
d. The index of refraction and the angle of incidence determine the bending.
e. The state of matter of the material determines the bending.
[Ques. 3] A ball thrown upwards reaches a maximum height and then comes back down to the original level. At the peak of the motion the velocity and acceleration are both zero.
Indicate whether the statement is true or false
[Ques. 4] Why is the sky blue?
a. Because it reflects the ocean.
b. Because water droplets refract the light.
c. Because blue light is scattered more than red light by atmospheric molecules.
d. Because blue is the complementary color to the yellow Sun.
e. Because dust particles in the air scatter different colors of light differently.
[Ques. 5] A ball thrown upwards reaches a maximum height and then comes back down to the original level. As the ball is going upwards the velocity and acceleration both point up.
Indicate whether the statement is true or false
[Ques. 6] What are complementary colors of light?
a. Colors that do not blend with one another.
b. Colors that blend together to produce red, green, or blue.
c. Colors that blend together to produce white.
d. Colors that blend together to produce black.
e. Colors that blend together to produce brown.
[Ques. 7] An aircraft approaches a runway that runs directly east as a strong wind blows out of the south. The direction that the aircraft should aim in order to land is east of north.
Indicate whether the statement is true or false
[Ques. 8] Which is a current good approximation for the speed of light?
a. 186,000 meters per second.
b. 3 108 meters per second.
c. 3 108 miles per second.
d. 3 1018 meters per second.
e. 333 meters per second.
[Ques. 9] A fast-moving body must have a larger acceleration than a slow-moving body.
Indicate whether the statement is true or false
[Ques. 10] How did scientists first prove that light had a finite speed?
a. By measuring how long it takes for a second observer to be seen uncovering a lantern on a distant mountain in response to the first observer uncovering a lantern.
b. By measuring how long it took to see lightning during a thunderstorm.
c. By measuring how fast a notched wheel must rotate for light passing through one notch to be reflected from a distant mirror back through the next notch.
d. By measuring how fast a multi-faced mirror must rotate for light reflected from one mirror face to be reflected from a distant mirror to reflect back from the next face.
e. By measuring how the revolution of the moons of Jupiter appears longer when they are farther from Earth.
Quick Reply
