How does a rollercoaster convert potential energy into kinetic energy and then back to potential energy again and again?

How do very high density objects appear in an ultrasound?

Movement of a specific direction is called

Ann drove to the store 10 km north of her house and then drove to the library which is 5 km south of the store

Choose which statements correctly identify the relationship of mass volume and density by clicking the sentence

Give examples of the one element from the alkaline earth metal group and one from the noble gases group.

Acceleration is a scalar quantity true or false

Find a numerical value for rhoearth, the average density of the earth in kilograms per cubic meter. Use 6378km for the radius of the earth, G=6.67*10-11m3 / (kg⋅s2), and a value of g at the surface of 9.80m/s2.

The driver of a car traveling at 32 m/s applies the brakes and undergoes a constant deceleration of 2.25 m/s^2.

The ability of an object to vibrate by absorbing energy at its natural frequency is called?

A hurricane in the Gulf of Mexico to 15 hours to travel 360 kilometers. What is the average speed of this hurricane in kilometers per hour?