A man dressed in all black is walking down a country lane. Suddenly, a large black car without any lights on comes round the corner and screeches to a halt. How did the car know he was there?

The displacement in a transverse traveling wave on a cord is represented by where D and x are in meters and t is in seconds.

If two forces act on an object and the forces are balanced, then the object experiences no net force. true false

A given amount of gas at 15 degrees Celsius has pressure P. What will be its temperature if the pressure becomes 3P, keeping volume constant

A forest fire makes a loud roaring sound. The explosive processes that release energy from the Sun occur at a much higher temperature. Why don't you hear a roaring sound from the sun?

A cell membrane is semi permeable what does it mean

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

If the mass of a material is 48 grams and the volume of the material is 8 cm^3, what would the density of the material be?

Your family is moving to a new house. While lifting the box 1.5 m straight up you exerted a force of 200 N for 1 second. How much work is required?

Which best describes oil and water

Both the electrical force and the gravitational force between two objects share which relationship? They are directly proportional to mass. They are inversely proportional to the square of the distance. They are inversely proportional to charge.