How did oxygen (O2) get into Earth's atmosphere?

Which of the following criteria cause Pluto to be demoted to a dwarf planet? A. Doesn't orbit around the sun. B. Is not spherical. C. Has too small of a diameter. D. Doesn't dominant (compose most of he mass of) it's orbit

Find the kinetic energy of a ball with a mass of 0.06 kg moving at 50 m/s. How large is the kinetic energy from this motion?

How does inertia affect the motion of an object?

The greater the amplitude of a sound wave, the louder the sound. true or false.

How does water get up to the atmosphere, and how does it get back down to earth surface

Which type of galaxy is a spherical cluster of stars with extraordinary brightness and little dust and gas?

When discussing discordant and harmonious sound waves, which statement is false? A. Both types of waves are the result of component waves with different frequencies. B.

6 foot waves carries more energy than a 3 foot waves

Why does a charged balloon stick to a neutral wall?

While the cart is moving along an aisle, it comes in contact with a smear of margarine that had recently been dropped on the floor. Suddenly the friction force is reduced for - 40.0 newtons to - 20.0 newtons.