If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?

Suppose the initial kinetic energy and final potential energy in an experiment are both zero. What can you conclude?

What is the molality of a solution that contains 54 grams of NaOH dissolved in 1.50 kg of water? (The molar mass of NaOH 40.00 grams/moles.)

A 4.5 kg box slides down a 4.3-m-high frictionless hill, starting from rest, across a 2.0-m-wide horizontal surface, then hits a horizontal spring with spring constant 510 N/m. The other end of the spring is anchored against a wall.

A nail is an example of a double inclined plane. True False

What is the area of a rectangle that has width of 1.50 x 103 cm and a length of 2.30 x 106 cm? Keep all the significant figures.

A firefighting crew uses a water cannon that shoots water at 25.0m/s at a fixed angle of 53.0 degrees above the horizontal. The firefighters want to direct the water at a blaze that is 10.0 m above ground level.

Sulfur oxides (SO2) are responsible for A) global warming. B) greenhouse gases. C) producing acid rain. D) destroying the ozone layer.

During a collision between a photon and an electron, there is conservation of

To produce change in motion, a force must be a (n) A) balanced force B) unbalanced force C) frictional force D) gravitational force

What is meant when Earth's systems are said to be "dynamic"? they are all the same type they are slow moving they cannot be measured they are constantly changing