written exam Flashcards
For concave mirrors, the condition that produces real, inverted and enlarged image is:
f < s < 2f, s’ > 2f
For concave mirrors, the condition that produces real, inverted and reduced image is:
f > 0, s > 2f, f < s’ < 2f
For concave mirrors, the condition that produces virtual, upright and enlarged image is:
s<f,s’<0
The condition that produces virtual, upright and reduced image is:
f < 0, s > 0, s’ < 0
Which describes best a positive lens:
converging lens
Which best describes a negative lens:
diverging lens
When the image is positioned in the opposite side as the outgoing light, it is a:
Virtual image
When the image is positioned in the same side as the outgoing light, it is a:
Real image
When the image distance is greater than the object distance, the magnification is:
inverted and enlarged
When the image distance is less than the object distance, the magnification is:
inverted and reduced
When the light moves from a low to high index of refraction, the speed of light in the medium:
slows down
When the light moves from a high to low index of refraction, the speed of light in the medium:
speeds up
Which best describes this scenario: a light ray refracts through from a low to higher index of refraction medium causing the rays to:
bend towards the normal line
Which best describes this scenario: a light ray refracts through from a high to lower index of refraction medium causing the rays to:
bend away from the normal line
When an object is positioned at infinity, which statement describes the relation of the focal length and the image distance:
f = s’
For a pipe closed at one end, the waves at the closed end is:
a node
For a pipe closed at one end, the waves at the open end is:
an antinode
For a pipe closed at one end, the values of the harmonics present are:
odd positive numbers only
When the temperature increases, the speed of sound in air will:
increase
When the molecular mass decreases, the speed of sound in air:
increases
The _ of a substance is the amount of heat that must be added to or removed from a unit mass of that substance to raise its temperature by 1C:
Specific heat capacity
When a vapor condenses into a liquid:
it liberates heat
The unit of heat are the following except:
Kg.m/s^2
Which of the following equations must be used to calculate the amount of heat required to melt an ice:
Q = +mLf
Which of the following equations must be used to calculate the amount of heat to convert steam to liquid:
Q = -mLv
It takes 53.0 J to raise the temperature of an 8.10 g piece of unknown metal from 13.0C to 24.0C. What is the specific heat for the metal:
595 J/kg.K
The aluminum calorimeter in “activity 2” is used in the experiment because of the following reason except:
to eliminate heating of the container since aluminum is a poor conductor.
It is a quantity which indicates the change in length per unit per degree temperature change:
coefficient of linear expansion
Which of the following statements is NOT true for a phase change?
In phase change, there is an accompanied change in the temperature
What important step must be done before introducing steam to the rod placed inside the linear expansion apparatus to avoid damage to the micrometer caliper?
Turn on the dial of the micrometer screw such that a small gap must exist between the rod and the micrometer screw.
What quantities can be used to measure an amount of heat?
Joule, Calorie, British thermal unit (Btu)
The following are parts of the calorimeter except:
steam generator
Which of the following does not belong to the group:
stirrer
Given the following data, Q/m = 234.11 Cal/Kg, W/m = 980 J/Kg, what is the value of the mechanical equivalent of heat?
4.186 J/Cal
When heat flow occurs between two bodies that are isolated from their surroundings, the amount of heat lost by one body must be _ the amount of heat gained by the other:
equal to
Name the parts of the calorimeter:
stirrer, inner cup, thermometer, fiber ring, outer calorimeter
