How do you express 78,000 in scientific notation?

7.8 x 103

7.8 x 104

7.8 x 10-4

Which of the following situations would cause the greatest increase in the motion of molecules in a system? A. The system absorbs 100 J of heat and has 100 J of work done to it. B. The system absorbs 100 J of heat and does 100 J of work. C.

A wave has a wavelength of 50 m and a speed of 200 m/s. What is the frequency of this wave in hertz?

Exits must be separated from the rest of the building by:

A rifle bullet with a mass of 11.5 g traveling toward the right at 251 m/s strikes a large bag of sand and penetrates it to a depth of 23.7 cm. determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.

What is one advantage infrared astronomy has over visible light astronomy?

which of the following objects is considered negatively charged A - one with excess electrons on the surface B - one with excess neutrons on the inside C - one with excess protons on the inside D - one with excess protons on the surface

In general, how do the densities of a material in solid and liquid form compare?

Alana summarized what happens when a ball sitting on top of a grassy hill rolls down the hill. The motionless ball has potential energy. Once the ball starts to roll down the hill, new kinetic energy is made.

What unit is commonly used when measuring the energy rating of an electrical appliance

Adding bleach to red food coloring causes the food coloring to lose its color it this physical or chemical change? Explain