A 40 kg ice skater glides with a speed of 2.0 m/s toward a 10.0 kg sled at rest on the ice. The ice skater reaches the sled and hold to it. The ice skater and the sled then continue sliding in the same direction in which the ice skater was originally skating. What is the speed of the ice skater and the sled after they collide??

When does your body conduct current more readily?

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.

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block