Astronomers have proposed the existence of an unexplained force that is causing the expansion of the universe to accelerate. What do they call this force?

dark matter

dark space

dark stars

dark energy

dark holes

Which of the following is an application of the Doppler effect used by submarines? radio radar scuba sonar

A wrench is used to tighten a spark plug. If the wrench handle is 0.20m and a force of 20N is applied, what is the torque applied? A) 0.01 Nm B) 0.4 Nm C) 4 Nm D) 10 Nm

What statement about a wave produced by a doorbell is true?

What new characteristic did John Dalton add to the model of the atom? An atom is a round, solid mass. An atom has a massive, positive center. An atom is made up of smaller particles. An atom can join with other kinds of atoms.

What happens to a hockey puck when a net force of 5 n acts on it

When preparing an emergency supply kit for a family, which is the minimun number of days the supplies shoulds last 2 3 7 30

Volcanic eruptions are caused primarily by the movement of 1 rock by erosion 2 Earth in its orbit 3 tectonic plates 4 planetary winds

Suppose I have two magnets. Magnet A dosen't have its poles labeled, but magnet B does have a clearly labeled north and South Pole. If these two are brought into contact with one another which of the following could you expect

How does air resistance affect the acceleration of falling objects?

A ride-sharing car moving along a straight section of road starts from rest, accelerating at 2.00 m/s2 until it reaches a speed of 28.0 m/s. Then the vehicle moves for 41.