Alex works at a legal firm which produces a lot of documents. Often Alex has to carry heavy stacks of documents from one office to another. On this particular day Alex, who weighs 75 kilograms, has to transport a stacks of documents which weighs 10 kilograms. He has to lift them 5 meters from the floor and then carry them to an office 100 meters down the hall, where he will drop them on the floor. Alex walks swiftly at a steady rate of 1 meter per second. What two pieces of information given in the above description will help you compute the amount of work Alex does when he lifts the papers?
Which example shows that electromagnetic waves can travel without moving through a specific material (medium)? A. light traveling through a glass window B. light traveling to the earth from an orbiting satellite C. rings made by a pebble when dropped in water D. sound traveling through air
The illustrations show concave and convex lenses. The arrows represent possible paths of light. Which illustration shows the correct path of light through a lens?
Which does not separate white light into the colors of the visible spectrum? A. rods in the retina of the human eye B. rain drops in the atmosphere C. a diamond ring D. cones in the retina of the human eye
Which describes the properties reflection, absorption, and transmission when a light is shinning on the oval end of a silver spoon? A. It reflects some light, transmits some light, and absorbs no light. B. It reflects a lot of light, transmits almost no light, and absorbs some light. C. It reflects all light, transmits all light, and absorbs some light. D. It reflects almost no light, transmits almost no light, and absorbs almost no light.
An object of mass m slides down an incline with angle. Which equation allows you to correctly calculate the normal force on the object?
if a person eats a steak (from a cow) the person is acting like A.) a primary producer B.) a primary consumer C.) a secondary consumer D.) a tertiary consumer E.) a quaternary consumer
The solid block shown here has a mass of 146 grams. What is the block’s density? width-3.0cm length-6.0cm
14. Because violet light has more energy than red light, A. red light is less bright than violet light. B. violet light has a higher wave frequency than red light. C. the mass properties of light are invariable. D. violet light is preferable in a photographer's darkroom.
Suppose your hair grows at the rate 1/32 inches everyday. Find the rate at which grows in nano meters per second. Because the distance between atoms in a molecule is on the order of .1nm, your answer suggests how rapidly layers of atoms are assembled in protein synthesis.
PLEASE HELP!!! THIS IS FOR 10 POINTS!!! As we look up into the night sky, the moon and stars appear to move from east to west. This is because we are A) watching the sky rotate overhead, from east to west B) viewing them from the surface of the rotating Earth C) also moving on Earth in the same direction, east to west D) orbiting on Earth around the Sun and nothing is really stationary
