If plants produce oxygen as a result of photosynthesis why aren't oxygen levels continually increasing the atmosphere

A 1000 watt microwave oven takes 90 seconds to heat a bowl of soup. How many joules of energy does it use?

Which of these examples would be classified as a longitudinal wave? A) X-Ray B) Red Light C) Shock Wave D) Radio Wave

What is the energy source of the convection cells in the earth's mantle? A. magma pushing through the crust at hot spots B. radioactive decay in the earth's interior C. gravity acting on the edge of the plates D.

What is the direction of magnetic field lines inside any magnet

A cat walks 15 m north and then 12 m south. What distance did the cat walk? O A. 27 m north O B. 3 m O c. 27 m O D. 3 m north

A baseball has mass 0.145 kg. (a) If the velocity of a pitched ball has a magnitude of and the batted ball's velocity is in the opposite direction, find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat.

A long distance runner has an average speed of 4m/s during a race. How far does the runner travel in 20 minutes?

Density is calculated by dividing

The one island species evolved into three different species. This is called?

Find the components of vector M shown in figure 5-7