What are the two main categories of body membranes

A science teacher ran a marathon. After the race she showed her students the silver blanket she was given to keep her warm. A group of students investigated how the colour of the blanket affected how much infrared radiation is absorbed

In general, the friction involved in sliding an object is ___ the friction involved in rolling an object. less than greater than equal to

What type of wave is sound? A. Gamma B. electromagnetic C. light D. pressure

How many protons, neutrons, and electrons are in a neutral atom with the symbol 41Ca A) 20 protons, 21 neutrons, 21 electrons B) 20 protons, 21 neutrons, 20 electrons Eliminate C) 21 protons, 21 neutrons, 20 electrons D) 41 protons, 0 neutrons, 41

A cat, walking along the window ledge of a new york apartment, knocks off a flower pot, which falls to the street 280 feet below.

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite

Oxygen makes up the largest part of living cells at 65%. What is the percentage of the second-most abundant element in living cells?

Acceleration is defined as the rate of change for which of the following? A. time B. velocity C. position D. displacement