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PSCI Need to Study Questions Solved 100% Correct| Verified Answers
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PSCI Need to Study Questions Solved 100% Correct| Verified Answers
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PSCI Need to Study Questions Solved 100%Correct| Verified Answers
If an object has a potential energy of 100 J and a total mechanical energy of 150 J,
what is its kinetic energy? 50 - ✔✔Which of the following is directly dependent
on gravity?
potential
What is the power of a person on a 2000 food calorie per day diet. Recall that
2000 food calories is 8368000 J and there are 86400 seconds in a day?
Correct Answer
96.9 W - ✔✔2 pts
What is the diameter of a CD or DVD? You may do this measurement again or
look back to your lab report to answer this question. (12cm)
You measure the boiling point of water as 102 degrees Celsius. Knowing that the
boiling point of water is actually 100 degrees Celsius, what is the percent error in
your measurement? (.2) - ✔✔What is NOT a method for finding an object's
volume? (air convesction)
An unknown substance has a volume of 16.5 cm3 and a mass of 53.2 g. What is its
density?
(3.22) - ✔✔5 g of sugar is mixed into water to make a solution with a volume
of 25 mL. What is the concentration of this solution 20%
A marble rolls down a ramp and does not slow down or speed up, but rather it
just travels at a constant speed. What can be said about the ramp? (e angle is set
, so that the force of gravity equals the force of friction and they cancel each other
out.) - ✔✔as you increase the angle of a ramp, what will happen to the
acceleration of the marble that is sent down the ramp? (
Larger angles will produce larger accelerations.)
Assuming the angle of a ramp is set so that the force of gravity pulling a marble
down is greater than the force of friction that the marble feels, what will happen
to the velocity of the marble as it goes down the ramp?
It's velocity will increase - ✔✔You have loose objects in the back of your car
and you are travelling at a high speed. If you make a sudden and quick stop, what
will happen to those loose objects?
(forward)
A person throws a ball and another person catches it. You measure the distance
between them and you measure the time it takes for the ball to travel between
them. Which of the following scenarios would give you most accurate data in
which to calculate the ball's speed? You have a stopwatch, the ball is in
motion...etc - ✔✔What happens to the velocity of a bowling ball as it rolls
along a flat, level surface? Friction is present in this system. The voloicity
decreases
You graph the position of a ball rolling without friction at various times. Time is on
the x-axis and position is on the y-axis. The graph shows straight line behavior
with a positive slope. If the data was collected again with a ball that had a larger
initial velocity, what would happen to the slope of the line on the graph?(The
slope would increase because more distance will be covered in a given time.) -
✔✔You drop a marble and measure two things: the height from which the ball
was dropped and the time it took for the ball to hit the floor. What could you
calculate with this data? (The acceleration of gravity.)
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