1. Trial and error is discouraged in science because it wastes time.

True

False

2. Conduction is the movement of energy from one substance to another by direct contact.

True

False

During the polarization of an object, what happens to the charges that the object carries? A Negative charges flow toward positive charges. B Positive and negative charges become separated. C Both negative and positive charges are produced.

What is a reflection of a wave?

A body of volume 100cc immersed completely in water contained in a jar. The weight of water and jar before immersion of the body was 700gm. After immersion, what will be the weight of water and jar?

How does speed relate to the distance covered and the time taken for travel?

A 50 kg man stands on the surface of a frozen pond. In order to get to the side of the pond he throws his 1 kg shoes at a speed of 10 m/s. After that what's the speed of the man? (neglect all frictions)

Inside a stereo speaker, you will find two permanent magnets: one on the cone and one near the cone. True of false?

When a hurricane nears land what causes the most damage

Calculate if an electric hair dryer uses 2,400 j of energy in 2 s, what is its power?

Which of the following choices best represents a potential stressor?

How do you distinguish between speed, velocity, and acceleration?