The gravitational acceleration on the moon is about one-sixth the size of the gravitational acceleration on Earth. According to Newton’s second law of motion, what happens to an astronaut who goes to the moon? The astronaut’s weight decreases because the moon’s gravitational acceleration is greater than Earth’s.
The astronaut’s weight increases because the moon’s gravitational acceleration is greater than Earth’s.
The astronaut’s weight decreases because the moon’s gravitational acceleration is less than Earth’s.
The astronaut’s weight increases because the moon’s gravitational acceleration is less than Earth’s.

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up