The hypothesis that simple organic molecules could form spontaneously from inorganic molecules in the early Earth's atmosphere was first proposed by

Miller and Urey

Charles Darwin

Watson and Crick

Oparin and Haldane

A 2.25-kg block is released from rest on a ramp of height h. when the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.

A force can best be defined as: a. a push or a pull b. gravity or friction c. something that is exerted d. change in velocity over change in time

A force of 6 lb is required to hold a spring stretched 4 in. beyond its natural length. How much work W is done in stretching it from its natural length to 8 in. beyond its natural length?

Which is required for convection to occur? A. a solid substance B. a heat source C. boiling water D. air molecules

What is the time it takes a pig to roll a distance of 6 m at a speed of 8 m/s? 0.7 m/s

What scientific question does Isaac Asimov most clearly address with his story "Runaround"? A. Should robots be allowed to marry? B, should robots be treated as members of the family? C. Can robots be trained to follow a moral code? D.

The force generated by a single muscle fiber can be increased by increasing is called

Write an expression that results in a String consisting of the third through tenth characters of the String s.

Noah Formula is in an airplane which is flying at constant speed in a circular course of radius 6500 m, circling O'Hare's airplane prior to landing. Noah observed that the plane completes each round trip in 345 seconds (5 minutes & 45 seconds).

Two pieces of metal with exactly the same mass are placed on a surface in bright sunlight. The temperature of the 1st block increases by 3°C while the temperature of the 2nd increases by 8°C. If the specific heat of the 2nd block is 0.