The density of an object is defined as:
a. the volume occupied by each unit of mass.
b. the amount of mass for each unit of volume.
c. the weight of each unit of volume.
d. the amount of the substance that has unit volume and unit mass.
e. the amount of the substance that contains as many particles as 12 grams of the carbon-12 isotope.
[Ques. 2] If
I = 2.0 mA and the potential difference,
VA VB = +30 V in the circuit segment shown, determine the charge and polarity of the capacitor.
a.
1.5 mC, left plate is positive
b.
1.5 mC, right plate is positive
c.
0.45 mC, left plate is positive
d.
0.45 mC, right plate is positive
[Ques. 3] A car originally traveling at 30 m/s manages to brake for 5.0 seconds while traveling 125 m downhill. At that point the brakes fail. After an additional 5.0 seconds it travels an additional 150 m down the hill. What was the acceleration of the car after the brakes failed?
[Ques. 4] In the circuit segment shown if
I = 7 mA and
Q = 50
C, what is the potential difference,
VA VB?
a.
40 V
b.
+40 V
c.
+20 V
d.
20 V
[Ques. 5] Starting from rest, a car travels 1350 meters in 1.00 minute. It accelerated at 1.0 m/s2 until it reached its cruising speed. Then it drove the remaining distance at constant velocity. What was its cruising speed?
[Ques. 6] A peregrine falcon dives at a pigeon. The falcon starts with zero downward velocity and falls with the acceleration of gravity. If the pigeon is 76.0 m below the initial height of the falcon, how long does it take the falcon to intercept the pigeon?
[Ques. 7] What is the current flowing through the 4- resistor?
a.
1 A
b.
2 A
c.
3 A
d.
6 A
[Ques. 8] A speedy tortoise can run with a velocity of 10.0 cm/s and a hare can run 20.0 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 minutes. The tortoise wins by a shell (20.0 cm). What was the length of the race?
[Ques. 9] What is the current flowing through the 2- resistor?
a.
2 A
b.
3 A
c.
4 A
d.
6 A
[Ques. 10] A helicopter descends from a height of 600 m with uniform negative acceleration, reaching the ground at rest in 5.00 minutes. Determine the acceleration of the helicopter and its initial velocity.
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