Four of the five answers are elements. Select the exception:
a. water
b. oxygen
c. carbon
d. chlorine
e. hydrogen
a
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How many forces operated in the universe during the GUT era?
A) one, what we call the "super force" B) two, gravity and the GUT force C) two, gravity and the electroweak force D) three, gravity, the strong force, and the electroweak force E) all of the above forces
Two cooks standing side by side in a restaurant pull their beaters out of the dough at the same instant. A glob of dough flies off each beater. Each glob lands on the top of a tin the same horizontal distance away and at its initial height. However, one lands later than the other. The explanation is that they left the beaters at angles ?1 and ?2 such that:
A.
B.
.C.
.D.
E.
A piece of taffy slams into and sticks to another identical piece of taffy at rest. The momentum of the two pieces of taffy stuck together after the collision is the same as it was before the collision
Kinetic energy is a different story, for part of it turns into heat. What percentage of the kinetic energy converts into heat? A) 0% B) 25% C) 50% D) 75% E) not enough information
Complete and balance the following equations:
a. HNO3 + Ba(OH)2 ? ____________________. b. H3PO4 + CaCO3 ? _____________________.