A man is driving a car. He slows down to stop at a stop sign. When does the car have the most kinetic energy (KE)?

When the car's speed is 30 miles per hour

When the car's speed is 15 miles per hour

When the car's speed is miles per hour

The car's motion energy is the same the whole time

Can someone me with questions 12 and 13 plz.

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?