How is the acceleration and instantaneous acceleration?

suppose in an expirement to determine the relation between force and stretch of a spring one group found that

Corey, whose mass is 95 kg, stands on a bathroom scale in an elevator. The scale reads 850 N for the first 3.0 s after the elevator starts to move, then 930 N for the next 3.0 s. What is the elevator's velocity 4.0 s after starting?

A cup of hot coffee can be cooled by placing a cold spoon in it. A spoon of which of the following materials would be most effective for this purpose: aluminum, copper, iron, or glass? Assume all spoons have the same mass.

How is a magnetic field generated? a. gravity b. moving electric charges c. charged particles that do not move d. an isolated magnetic pole?

Which statement best describes wavelength

Suppose your hair grows at the rate of 1/55 inch per day. Find the rate at which it grows in nanometers per second. Because the distance between atoms in a molecule is on the order of 0.

A water skier is pulled behind a boat. When the skis push down on the water, what is the reaction force? A. The skier pulls back on the boat. B. Earth's gravity pulls down on the skis. C. The water pushes up on the skis. D. The boat pulls the skier.

Approximately how much electrical energy does a 5-W light bulb convert to radiant or thermal energy in one hour

If a clock expends 2 W of power from a 1.5 V battery what amount of current is supplying the clock?

The rectangular plates in a parallel-plate capacitor are 0.063 m * 5.4 m. A distance of 3.5 * 10-5 m separates the plates. The plates are separated by a dielectric made of Teflon, which has a dielectric constant of 2.1.