Physical Quantities and Units

Physical Quantities and Units

10th - 12th Grade

5 Qs

quiz-placeholder

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Physical Quantities and Units

Physical Quantities and Units

Assessment

Quiz

Physics

10th - 12th Grade

Practice Problem

Hard

Created by

S Frans

Used 14+ times

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5 questions

Show all answers

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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