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Heat natural travels
from cold to hot objects
from hot to cold objects
from/to objects of the same tempretature
cannot be predicted
a temperature difference
energy content of an object
a property objects have by virtue of their temperatures
energy transferred by virtue of a temperature difference
Running a refrigerator with its door open in a hot room makes the room
either A or B
neither A or B
Your grandmother places a pitcher of iced tea next to a plate of warm, freshly baked cookies so that the pitcher and the plate are touching. You tell your grandmother that the plates are in thermal contact, which means that
heat flows from the cold pitcher to the warm plate
heat flows from the warm plate to the cold pitcher
heat flows within the warm plate but not within the cold pitcher
heat flow from the warm plate to the cold pitcher and from the cold pitcher to the warm plate
Energy transfer by convection is primarily restricted to one of these
The higher the temperature of an object, the
lesser the wavelengths it radiates
longer the wavelengths it radiates
more wavelength is radiates
shorter the wavelenghts it radiates
What kind of waves causes the particles over which they pass to vibrate at right angles(perpendicular) to the direction of wave motion?
Which of the following colors ofl ight has the shortest wavelength?
What is transferred by a wave from one point to another?
mass of the medium
particles of the medium
volume of the medium
What happens to the frequency of a train'swhistle as it gets closer to the observer?
reamins the same
What is the correct arrangement of light according to increasing wavelength?
blue, green, yellow, violet, red,orange
blue, violet, orange red, yellow, green
green, blue, violet, yellow, red, orange
violet, blue, green, yellow, orange, red
In reflection, the angle of incidence
must be equal to the angle of reflection
is always less than the angle of reflection
is always greater than the angle of reflection
may be greater than, less than, or equal to the angle of reflection
On a distance-time graph, a horizontal straight line corresponds to motion at
On a distance-time graph, a straight line sloping upward to the right corresponds to motion at
During which interval is the car at rest?
During which interval does the car have the greatest positive velocity?
A physical quantity that describes how fast a body moves.
What is the acceleration of the car that maintains a constant velocity of 100 km/h for 10 seconds?
Which of the following will happen if a driver steps on the accelerator?
no fuel is consumed
the car speeds up
the car covers less distance
the car has a negative acceleration
Ryan runs 7 km west, then 4 km north, and finally 4 km east. What is the total distance covered by Ryan?
Ryan's total distance covered is 15 km within 2 hours, what is its average speed?
Ellie, a thin girl, pushes Lenie who is stout. Both girls are on the roller skates. Which statement is correct?
Only Ellie will accelerate
Ellie will accelerate than Lenie
Ellie will accelerate more than Lenie
Ellie and Lenie will have the same acceleration
To balance boys of unequal weights on a seesaw,
the heavier boy should seat nerr the center
the lighter boy should should sit nearer the center
the two should be equally near the center
both should be equally away from the center
An object maintains its state of motion because it has
Which of the following is TRUE of the mass and weight of an astronaut on Mars, if compared with his mass and weight on Earth?
less mass and less weight
less mass and more weight
the same mass and less weight
the same weight and less mass
As a rock falls off a cliff, its
kinetic energy increases
potential energy increases
kinetic energy increases and potential energy decreases
kinetic energy decreases and potential energy increases
An object is negatively charged whenever
it has an excess of protons
it has a deficiency of protons
the nuclei ofi ts atoms are positively charged
the nuclei ofi ts atoms are negatively charged
Which sentence/s best describe/s electrical conductors?
i. Electrical conductors has low mass density
ii. Electrical conductors are good conductors of heat
iii. Electrical conductors are have tightly bounded electrons
iv. Electrical conductors have loosely bounded electrons
v. Electrical conductors have valence electrons of one or two
When the ends of two bar magnets are placed near each other, they attract one another. The interacting ends must be
one north, the other south
one south, the othere north
two north poles
two south poles