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- Multiple ChoicePlease save your changes before editing any questions.
Heat natural travels
from cold to hot objects
from hot to cold objects
from/to objects of the same tempretature
cannot be predicted
- Multiple ChoicePlease save your changes before editing any questions.
Heat is:
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
- Multiple ChoicePlease save your changes before editing any questions.
Running a refrigerator with its door open in a hot room makes the room
cooler
warmer
either A or B
neither A or B
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
Energy transfer by convection is primarily restricted to one of these
fluids
gases
liquids
solids
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
What kind of waves causes the particles over which they pass to vibrate at right angles(perpendicular) to the direction of wave motion?
diffracted waves
longitudinal waves
polarized waves
transverse waves
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following colors ofl ight has the shortest wavelength?
blue
green
white
yellow
- Multiple ChoicePlease save your changes before editing any questions.
What is transferred by a wave from one point to another?
energy
mass of the medium
particles of the medium
volume of the medium
- Multiple ChoicePlease save your changes before editing any questions.
What happens to the frequency of a train'swhistle as it gets closer to the observer?
decreases
increases
reamins the same
resonates
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
On a distance-time graph, a horizontal straight line corresponds to motion at
zero speed
increasing speed
constant speed
decreasing speed
- Multiple ChoicePlease save your changes before editing any questions.
On a distance-time graph, a straight line sloping upward to the right corresponds to motion at
zero speed
increasing speed
constant speed
decreasing speed
- Multiple ChoicePlease save your changes before editing any questions.
During which interval is the car at rest?
1-6 s
6-11 s
11-14 s
14-17 s
- Multiple ChoicePlease save your changes before editing any questions.
During which interval does the car have the greatest positive velocity?
1-6 s
6-11 s
11-14 s
14-17 s
- Multiple ChoicePlease save your changes before editing any questions.
A physical quantity that describes how fast a body moves.
acceleration
distance
displacement
speed
velocity
- Multiple ChoicePlease save your changes before editing any questions.
What is the acceleration of the car that maintains a constant velocity of 100 km/h for 10 seconds?
0
20 km/h/h
50 km/h/h
80 km/h/h
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
Ryan runs 7 km west, then 4 km north, and finally 4 km east. What is the total distance covered by Ryan?
37 km
15 km
7 km
5 km
- Multiple ChoicePlease save your changes before editing any questions.
Ryan's total distance covered is 15 km within 2 hours, what is its average speed?
18.5 kph
7.5 kph
3.5 kph
2.5 kph
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
An object maintains its state of motion because it has
acceleration
inertia
speed
velocity
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
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
i only
ii,v
ii,iii,iv,v
ii,iv,v
i,ii,iii,iv,v
- Multiple ChoicePlease save your changes before editing any questions.
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