What are the correct answers for these multiple choice questions?

1. Which one is NOT a characteristic of a scientific theory?

A.

Being testable

B.

Being provisional

C.

Agreeing with previous theories

D.

Predicting new outcomes

E.

All of the above are characteristics of a scientific theory

2. Ancient Greeks used a few methods to determine the roundness of the Earth. Which of the following were among these methods?

A.

Comparing the position of North Star in different latitudes

B.

Studying the shadow of the Earth on the moon during lunar eclipses

C.

Observing that the mast of a ship is seen before the body, as it approaches the shore

D.

None of the above

E.

All of the above.

3. Which one of the following was the most conclusive evidence against the Geocentric model (last nail in the coffin of Geocentric model)?

A.

Copernicus's Heliocentric model

B.

Galileo's observation of Jupiter's moons.

C.

Kepler's postulate of elliptical orbits

D.

Only A and C

E.

All of the above.

4. You are sitting on a frictionless floor of a stationary wagon. When the wagon starts to move forward, you get pushed against the back of the wagon. This can be explained by:

A.

Newton's fist law (Law of Inertia)

B.

Newton's third law (Action and Reaction)

C.

Different frames of reference

D.

Fictitious forces

E.

Newton's First and Third Law together

5. You are inside a windowless room. You observe that a hockey puck, which is on a frictionless surface, goes on a circle without any apparent force acting on it. Which statement is correct?

A.

This violates Newton's first law because despite no apparent force acting on the object, it swerves from straight path

B.

Our frame of reference must be spinning, hence it is not an inertial frame of reference and NFL is not violated, as it only applies to inertial reference frames.

C.

There must be a force acting on the puck, even if we don't see the force.

D.

None of the above

E.

All of the above

6. The spaceship Voyager1 has travelled roughly 17 Billion miles since its launch in 1977. How is it possible for a spaceship with a limited fuel to travel thus far?

A.

Its fuel was actually chosen to be extremely efficient to burn for decades

B.

Its fuel actually has long finished and it is gradually slowing down

C.

it does not need fuel anymore and due to lack of friction in space is speeding up.

D.

It does not need fuel to keep moving, due to Newton's first law

E.

None of the above

7. Earth is spinning with a rotational speed of 1656 km/h. why don't we feel this rotation?

A.

Because we are bunch of emotionless, cold-blooded humanoids.

B.

Because we are accustomed to such high angular velocities.

C.

Because Earth's gravity is strong enough to keep us attached to it.

D.

Because in rotational motion, it is the angular speed that matters and not the linear speed and the angular speed of earth's rotation is miniscule, because it spins once every 24 hours.

E.

None of the above

8. Why is it that on the surface of the Earth a rock falls faster than a piece of unfolded paper?

A.

Rock has more inertia than paper.

B.

Rock has less inertia than paper.

C.

Rock has more inherent tendency to reach to its natural state which is being at rest.

D.

Because the opposing role of air friction that affects paper more than rock.

E.

None of the above.

9. The propulsion mechanism of space shuttles directly uses the following concept:

A.

Inertial vs non-inertial frames of references

B.

the fact that friction plays a crucial role in driving vehicles forward on earth

C.

Newton's Third law (Action and Reaction)

D.

Fictitious forces

E.

None of the above

10. You wake up inside a windowless wagon and observe a ball drops from the ceiling and falls backward. According to this scenario which of the following statements is correct:

A.

The wagon must be moving with constant velocity forward.

B.

The wagon can be considered an inertial frame of reference.

C.

There is a force acting on the ball, making it deviate from straight path and fall backward.

D.

The wagon is a non-inertial frame of reference.

E.

All of the above