What structure allows only certain things to pass in and out of the cells

Galileo was the first scientist to do which of the following?

Which example best describes using a wheel and axie?

The planet neptune has a mass of 1.02 x 10^26 kg, and earth's mass is 5.97 x 10^24 kg. what is the gravitational force between the planets when they are 4.5 billion kilometers apart? A: 2.0 x 10^15 B: 2.0 x 10^21 C: 3.0 x 10^25 D: 3.0 x 10^31

What is the kinetic energy of a 1200kg object that is moving with a speed of 24 m/s

Which explains why the sky appears blue on a sunny day? A. Colors of light with longer wavelengths scatter too far for the eye to detect. B. Blue light scatters in all directions more than other colors of light. C.

What happens to the resistance of a filament if it is replaced by a shorter wire?

One group of scientists feel that global warming affects the frequency of hurricanes. Another group of scientists believe that global warming does not affect the frequency of hurricanes, but it makes the average hurricane stronger.

In an experiment, all participants receive a treatment but those in the control group recieves a false treatments

When the volume increased, what happened to the density?

8. Chemical weathering occurs more rapidly in what kind of climates? A. Desertlike B. Cold with high snowfall amounts C. Cool and dry D. Warm with abundant rainfall