What do lenses do?

A:reflect light

B:refract light

C:concave mirror

D: interfere with light

Is this statement true or false? Plains Indian bags often have symmetrical designs of shapes and lines. A. True B. False

Two boys want to move the chair by applying two forces perpendicular to each other, of module F1 = 65 N and F2 = 83 N. Another boy applies a force F3 to the chair which opposes the movement and keeps it steady.

A wave has frequency of 10,000 Hz and a wave length of 2cm. Calculate the speed.

Every substance has a specific value of heat required to change the temperature of 1 gram of the substance by 1 degree Celsius.

a 2,000 pound car is driving at 60 miles/hour along a straight, level road. what is the net force acting on the car?

Why are the sedimentary layers at capitol reef tilted?

What do we call it when an object exerts force on another for a short period of time? * Momentum Work Impulse Friction

Why is flammability a chemical property?

Luke pulls a sled using a force of 65 N for a distance of 25 m across level ground. The rope Luke pulls forms an angle of 25° with the ground. About how much work does Luke do on the sled? 250 J 690 J 1,500 J 1,600 J

Intramolecular and intermolecular forces hold together which of the following? A. atoms within a molecule B. molecules within an object C. charged particles within a salt crystal D. the atoms within compounds E. all of the above