Jessica and taylor are playing in a seesaw. taylor is suspended in the air and is unable to move her seat down. explain why taylor cannot swing back down.

1: the force is pushing down is less then the force pushing up on taylor’s seat.

2: jessica is standing on her seat causing taylor to be suspended in the air

3: the weight of jessica is more then the weight of taylor.

4: jessica and taylor are equal of weight.

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.