Atomic Nucleus: In a 
Nb nucleus, how many protons, neutrons, and electrons are found there?
A. 41, 52, 93
B. 41, 52, 41
C. 52, 41, 41
D. 41, 52, 0
E. 93, 41, 93
Answer: D
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How do we know that there are large gaps in the average distances of asteroids from the Sun (within the asteroid belt)?
A) We can see the gaps through telescopes. B) We can identify the gaps by looking for stellar occultations in which an asteroid passed in front of a star as seen from Earth. C) We have not actually detected any gaps, but theory says they must exist. D) We know the gaps must be present to explain how our spacecraft have successfully navigated the asteroid belt without suffering collisions. E) We notice gaps on graphs showing the distribution of asteroids with different orbital periods.
When a car goes around a banked circular curve at the proper speed for the banking angle, what force cause it to follow the circular path?
A) the normal force exerted by the road on the car perpendicular to the road's surface B) the friction force exerted by the road on the car C) the force that Earth exerts on the car D) No force causes the car to do this because the car is traveling at constant speed and therefore has no acceleration.
Imagine an astronaut falling into a black hole. Describe the effects that the astronaut would experience firsthand, and the changes that an external observer would see
What will be an ideal response?
A speedy tortoise can run with a velocity of 10.0 cm/s and a hare can run 20.0 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 minutes. The tortoise wins by a shell (20.0 cm). What was the length of the race?
What will be an ideal response?