Which of these does NOT emit visible light?

A. a star

B. the Sun

C. a galaxy

D. the Moon

Which of the following is not one of da Vinci's contributions to technology? a. effect of the moon on tides b. modern theory on the formations of the continents c. precise observations of human anatomy d. ideas for space travel

A projectile is launched at an angle above the ground. The horizontal component of the projectile's velocity, vx, is initially 40. meters per second. The vertical component of the projectile's velocity, vy, is initially 30. meters per second.

Calculate the efficiency of an engine of the work input is 300 jewels and the work output is 100 rolls

You are holding a full bowl of hot soup while standing in the kitchen. As you begin moving, some of the soup spills out of the bowl onto the floor. Upon reflection, you realize that A) the soup spilled because of air resistance.

The frequency of which type of electromagnetic wave is just higher than that of radio waves? A) infrared rays B) ultraviolet rays C) x-rays D) microwaves E) gamma rays

A satellite with a mass of 2,000 ㎏ is inserted into an orbit that is twice the Earth' s radius. W hat is the force of gravity on the satellite? The radius of the Earth is 6380 km, and the mass of the Earth is 5.98 X 1024 kg a. 2,000 N h.

our canisters contain helium gas. If all the canisters had the same amount of particles, which canister would have the fastest moving particles?

The acceleration due to gravity is

How does gravitational force and electric force compare?

There are two types of addiction, psychological and physical. A. True B. False