What type of wave requires a medium to transfer energy?

Radio

Mechanical

Electromagnetic

Light

A 4kg object has 400j of potential energy. find how high off the ground the object is

1: A car traveling at 10 m acceleration uniformly at 2 m. Calculate its velocity after5 s.

When nuclear fission occurs some mass is lost where does that mass go

What is some of the evidence for the speed at which glaciers are melting?

Today, Earth's magnetic field is losing approximately 7 percent of its strength every 100 years. If the strength of Earth's magnetic field at its surface is 0.5 gauss today, what will it be 100 years from now?

A building that is 105.50 ft. feet tall is casting a shadow that is 37.50 ft. feet. If the building next to it, is casting a shadow of 41.00 ft. feet, how tall is that building?

What is the technical name for super glue type adhesives

On his fishing trip Justin takes the boat 25 km south. The fish aren't biting so he goes 10 km west. He follows a school of fish 15 km north. What distance did he cover? What was his displacement?

n open rectangular tank is filled to a depth of 2 m with water (density 1000 kg/m3). On top of the water there is a 1 m deep layer of gasoline (density 700 kg/m3). The width of the tank is 1 m (the direction perpendicular to the paper).

Is the sun considered a star?