A boat sends a sonar signal to find out how deep the ocean is. It takes 10 seconds for the

signal to hit the ocean bottom and return to the earth. What is the distance to the bottom of the

ocean if the sonar signal moves at 1700 m/s?

A moving hammer hits a nail and drives it into a wall. if the hammer hits the nail with twice the speed, how much deeper will the nail be driven? if the hammer hits with three times the speed?

What happens when a rubber rod is rubbed with a piece of fur?

Alfredo makes a diagram to organize his notes about charging objects. Which statement should he place in the region marked X?

What holds the positively charged metal ions together within a metallic bond?

Match each measurement tool with what it measures. Thermometer Humidity Weather vane Temperature Anemometer Wind direction Hygrometer Wind speed

16. Which method is used to deliver heat in most central heating systems? O conduction O convection O radiation

I throw a ball upwards. Which of the following is a true statement? A. At the top of its climb, its velocity will be 9.8 m/s2 B. At the top of its climb, its acceleration will go to 0. C. At the top of its climb, its velocity will go to 0. D.

The presently accepted value of the hubble constant gives an age of

Using Newton's laws, describe what happens to your body when you get in a car crash. Why is important to wear a seat belt and have airbags?

What is black matter?