Why is stepping on a can considered a physical change?

If a metal ball suspended by a rod is at rest, which force is responsible for balancing the force due to gravity?

What is the biggest planet?

When an object moves away from Earth, its light waves are stretched to a lower frequency, or longer wavelength, and thus we say the light is redshifted. True False

Car 1 drives 45 mph to the west, and car 2 drives 30 mph to the east. From the frame of reference of car 1, what is the velocity of car 2?

Hey im 14 and a half 5ft 5 i wear size 10 and a half shoes my toes are raging through them for 11s i havent had my growth spurt yet is this a sign of a upcoming growth spurt my feet are growing

What are the arrangement of resistors in series

A pilot flies horizontally at 1300 km/h, at height h! 35 m above initially level ground. However, at time t! 0, the pilot begins to fly over ground sloping upward at angle u! 4.3° (Fig. 2-38).

A helicopter flies 30 km 30 degrees north of east, drops of the supplies to a research team; it then heads 50 degrees north of west traveling 70 km to drop the supplies to a filming crew. What is the resultant displacement of the helicopter?

Plaskett's binary system consists of two stars that revolve in a circular orbit about a center of mass midway between them. This statement implies that the masses of the two stars are equal (see figure below).

Is mercury (the planet) rocky or gaseous (meaning relating to or having the characteristics of a gas.)