Persuade a pet owner, who owns a 25kg dog, to restrain the pet while it is riding in the back of a pickup truck. INCLUDE 1st and 2nd LAWS OF MOTION)
Shivering to warm up illustrates which characteristic of life? A. adaptation to environment B.homeostasis C.getting energy D.growth
How are frequency and period related to each other? A. They are the same for any given wave B. They have the same magnitude but opposite signs C. They are reciprocals of each other D. They are both found by squaring the amplitude of a wave
A bicycle traveled 150 meters west from point A to point B. Then it took the same route and came back to point A. It took a total of 2 minutes for the bicycle to return to point A. What is the average speed and average velocity of the bicycle?
Which points are 56 units from the point located at 13 on a number line? A. –69 and 69 B. –69 and 43 C. –43 and 69 D.
Noise reduction headphones actively produce their own sound waves in order to cancel out external sound waves. A microphone in the headphones receives waves of one frequency. A loudspeaker in the headphones then produces a wave of that frequency but of a different phase. What is the phase difference between the external sound wave and the wave produced by the loudspeaker in the headphones? A. 90 B.180 C 270 D 360
If the force of a golf club on a golf ball is 200 N forward, what will the force of the ball on the club be? A. 200 N forward B. 200 N backward C. 400 N forward D. 400 N backward
How do scientists determine the number of neutrons in an isotope of an atom? A. They find the number of protons. B. They divide the atomic mass by two. C. They add the number of electrons and protons. D. They subtract the atomic number from the atomic mass.
The flow of electrons through a circuit is measured in which of the following units? A. electrical pressure B. amperes C. volts D. electrical Current
in a circuit with two resistors in parallel, which of the following pair applies? a. V and I both increase across both resistors. b. V is constant across both resistors, but the current changes. c. Voltage and current both remain constant over both branches of the circuit. d. V and I both decrease across both resistors
When fuel and air are compressed in the compression stroke, ...... a. each molecule of fuel is heated to its flash point b. each molecule of air is heated to its flash point c. the exhaust valve opens to release excessive pressure
The light ray is entering the water from the air. How should the light ray respond to the change of medium? A. It will slowdown and bend upward B. It will speed up and bend upward C. It will slow down and bend downward D. It will speed up and bend upward
22. The main purpose of the turbine in the turbojet engine is to A. drive the compressor. B. reduce the temperature of the exhaust gas. C. increase the velocity of the exhaust gases. D. compress the air.
