
Physical Quantities and Units
Authored by S Frans
Physics
10th - 12th Grade
Used 14+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The equation relating pressure and density is p = ρgh.
How can both sides of this equation be written in terms of base units?
[N m-1 ] = [kg m-3 ] [m s-1 ] [m]
[N m-2 ] = [kg m-3 ] [m s-2 ] [m]
[kg m-1 s-2] = [kg m-3 ] [m s-2 ] [m]
[kg m-1 s-1] = [kg m-1 ] [m s-2 ] [m]
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is a reasonable estimate of the diameter of an alpha particle?
10-15 m
10-12 m
10-9 m
10-6 m
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A laser emits light of wavelength 600 nm.
What is the distance, expressed as a number of wavelengths, travelled by the light in one second?
5 x 108
5 x 1011
5 x 1014
5 x 1017
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
At temperatures close to 0 K, the specific heat capacity c of a particular solid is given by c = bT 3, where T is the thermodynamic temperature and b is a constant characteristic of the solid.
What are the units of constant b, expressed in SI base units?
m2 s-2 K-3
m2 s-2 K-4
kg m2 s-2 K-3
kg m2 s-2 K-4
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The drag force F acting on a moving sphere obeys an equation of the form F = kAv2, where A represents the sphere’s frontal area and v represents its speed.
What are the base units of the constant k ?
kg m5 s-4
kg m-2 s-1
kg m-3
kg m-4 s2
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