2 dm expressed in milimeters

A light source emits a beam of photons, each of which has a momentum of 2.7 * 10-29 kg·m/s. (a) what is the frequency of the photons? (b) to what region of the electromagnetic spectrum do the photons belong?

Which one has larger kinetic energy: a 500-kg object moving at 40 m/s or a 1000-kg object moving at 20 m/s?

Which of the following are needed to describe both vectors and scalars? check all that apply. a. direction b. magnitude c. units d. mass

You pour 170 g hot coffee at 78.7°c and some cold cream at 7.50°c to a 115-g cup that is initially at a temperature of 22.0°c. the cup, coffee, and cream reach an equilibrium temperature of 58.0°c.

Match each law or principle to its description. 1. law of original horizontality 3 The youngest strata is at the top and the oldest is at the bottom. 2. law of superposition 1 Sediment gets pulled down by gravity in a horizontal and flat layer. 3.

Which of the following is not a receptor pair according to the opponent process theory? A. red versus green B. yellow versus blue C. black versus white D. yellow versus red

A scientist adds different amounts of salt to 5 bottles of water. He then measures how long it takes for the water to boil. what is the dependent variable in this experiment?

Bacteria which do not live in extreme conditions are found in this kingdom:

How many moles of h2 gas would be contained in 4.00 of the gas at 202.6KPa and 127c?

Which of The following are classiFcatons describing how rock and oTher maTerial movedownslope? a. Fall, b. slide, c. slump, d. creep, e. fow