A man of mass 60kg climbs up a 20m long staircase to the top of building 10m high. What is the work done by him

If copper is cut into three pieces of unequal length. all three pieces of copper would have the physical properties?

The NET force on a rock that weighs 2 N when you hold it at rest above your head is?

Which situations describe an elastic collision? a.) Two glass marbles bounce off each other. b.) Rodrick flops onto his sofa and sinks into the cushion. c.) A tossed water balloon flattens when it lands on the grass. d.

Which device would you use to most easily measure the illuminance on a surface

The model of the universe that the earth is in the center is called

Sulfur oxides (SO2) are responsible for A) global warming. B) greenhouse gases. C) producing acid rain. D) destroying the ozone layer.

During a collision between a photon and an electron, there is conservation of

To produce change in motion, a force must be a (n) A) balanced force B) unbalanced force C) frictional force D) gravitational force

What is meant when Earth's systems are said to be "dynamic"? they are all the same type they are slow moving they cannot be measured they are constantly changing

Which of the following statements about electrons is FALSE? Group of answer choices the closer an electron is to the nucleus, the more strongly the electron is attracted to the nucleus and therefore the more potential energy the electron has