The sky, which was bright blue, is now dark. you look up expecting to see a halo of light in the sky. what just occurred?

(A. an aurora

(B. a solar eclipse

(C. a solar black out

(D. a lunar eclipse

The electrical force between charges is strongest when the charges are

why does the wind blow faster as it passes between tall building in a city?

In a vacuum (an environment without air), what will happen when two objects with different mass are dropped at the same time from the same height? A. They both land at the same time. B. The less massive object lands first. C.

A boat is traveling with a velocity of 18 meters/second relative to water and the river is flowing at a velocity of 2.5 meters/second relative to the shore. What will be the velocity of the boat if the boat and the water are in opposite directions?

Give a statement that shows the correct relationship between current, voltage, and power.

A 0.500-kilogram cart traveling to the right on a horizontal, frictionless surface at 2.20 meters per second collides head on with a 0.800-kilogram cart moving to the left at 1.10 meters per second.

Which of the following objects is in dynamic equilibrium? A - a man standing in one place without moving B - a bicycle accelerating forward at 1.

A boat is traveling upstream in the positive direction of the x axis at 10 km/h with respect to the water of a river. The water is flowing at 7 km/h with respect to the ground. (a) What is the velocity of the boat with respect to the ground?

What are the standard units of length mass volume and temperature?

Approximately how long is a light-year? A. 9.5 billion km B. 95 billion km C. 9.5 trillion km D. 95 trillion km