PHY 101 MIDTERM ACTUAL UPDATED QUESTIONS AND CORRECT ANSWERS
What is the distance between Earth to the Sun measured 100 Sun diameters
in Sun diameters? Answers are rounded up to one
significant digit.
What determines the shape of the illuminated region? Mostly, it is determined by the shape of the object (the Sun or the lamp).
For the determination of the size of the sun, the The distance from Earth to Sun
experiment requires a piece of information that is not
directly measured. This is:
If the distance from the pinhole to the projection surface
is doubled, what happens to the area of the illuminated
region?
If the distance from the light source to the pinhole is
doubled, what happens to the area of the illuminated
region?
, Assume that the lamp used in the experiment emits light 5 cm.
from a surface of diameter 10 cm and that is located at 1
m. from the pinhole. If the pinhole is 0.5m from the
projection surface, what is the diameter of the illuminated
region?
In the setup suggested in the procedure, the projection It makes the shape of the area elliptical instead of circular.
surface is perpendicular to the direction of incidence of
the light. Consider the case where the surface is not
perpendicular but, rather, is tilted with respect to the
direction of incidence of the light. What is the main effect
of the tilting on the observed illuminated area?
Which quantity cannot be determined from the The mass of the Sun
experiment?
A rubber band is used to hold an object. What is the net The net force is zero. The sum of forces on the rubber band cancel.
force on the rubber band? Select the best answer.
When you stretch a rubber band with a pair of fingers, Two forces. One pulling at each end of the band.
what is the number of forces that should be used to
described the action of your hand on the rubber band?
Select the number and the associated explanation.
Ignore the weight of the band.
You pull one rubber band with one finger from each Pulling two rubber bands at the same time so that they reach 1 unit of
hand until it shows 2 units of deformation. Which of the deformation.
following combinations of rubber bands produce the
same force experience on your fingers?
Similar to the case in the experiment you use two rubber Three units of deformation.
bands, side to side first, to hold a weight of 3 reference
objects. Then, as in the experiment, the bands are pulled
apart in their free ends until they form an angle of 30
degrees with respect to the horizontal. What are the
deformations observed in these bands?
What is the distance between Earth to the Sun measured 100 Sun diameters
in Sun diameters? Answers are rounded up to one
significant digit.
What determines the shape of the illuminated region? Mostly, it is determined by the shape of the object (the Sun or the lamp).
For the determination of the size of the sun, the The distance from Earth to Sun
experiment requires a piece of information that is not
directly measured. This is:
If the distance from the pinhole to the projection surface
is doubled, what happens to the area of the illuminated
region?
If the distance from the light source to the pinhole is
doubled, what happens to the area of the illuminated
region?
, Assume that the lamp used in the experiment emits light 5 cm.
from a surface of diameter 10 cm and that is located at 1
m. from the pinhole. If the pinhole is 0.5m from the
projection surface, what is the diameter of the illuminated
region?
In the setup suggested in the procedure, the projection It makes the shape of the area elliptical instead of circular.
surface is perpendicular to the direction of incidence of
the light. Consider the case where the surface is not
perpendicular but, rather, is tilted with respect to the
direction of incidence of the light. What is the main effect
of the tilting on the observed illuminated area?
Which quantity cannot be determined from the The mass of the Sun
experiment?
A rubber band is used to hold an object. What is the net The net force is zero. The sum of forces on the rubber band cancel.
force on the rubber band? Select the best answer.
When you stretch a rubber band with a pair of fingers, Two forces. One pulling at each end of the band.
what is the number of forces that should be used to
described the action of your hand on the rubber band?
Select the number and the associated explanation.
Ignore the weight of the band.
You pull one rubber band with one finger from each Pulling two rubber bands at the same time so that they reach 1 unit of
hand until it shows 2 units of deformation. Which of the deformation.
following combinations of rubber bands produce the
same force experience on your fingers?
Similar to the case in the experiment you use two rubber Three units of deformation.
bands, side to side first, to hold a weight of 3 reference
objects. Then, as in the experiment, the bands are pulled
apart in their free ends until they form an angle of 30
degrees with respect to the horizontal. What are the
deformations observed in these bands?
