Physics Chapter 1

1 m 2 m

Select all of the following measurements that are the least precise.

0.0150 m 0.0100 m

Select all of the following measurements that are the most precise.

0.10 m 0.010 m

Select all of the following measurements that are the most precise.

Fahrenheit hours years

Select all of the following that are not SI units.

It is a ratio. It is a number by which a quantity is multiplied or divided.

Select all of the following that correctly identify what a factor is.

2 -2

Select all values of x that make (4/x3) - (1/x) = 0 true

-2 3

Select all values of x that make x2 - x - 6 = 0 true.

-2 2 0

Select all values of x that make x3 - 4x = 0 true.

45π cm3

What is the volume of a cylinder of radius 3 cm and length 5 cm?

288π cm3

What is the volume of a sphere of radius 6 cm?

Space and time Matter and energy

What things does physics seek to describe at the most basic level?

More significant figures More precision

A more meaningful result of measurement contains what? Answer all that apply.

No, since the quantities have different dimensions.

An object with mass m moving in a circle of radius r with speed v has linear momentum of magnitude mv and an angular momentum of magnitude mvr. Is it dimensionally possible to add the magnitudes of linear momentum and angular momentum?

Yes, since both quantities have the same dimensions.

An object with mass m moving with speed v has a kinetic energy (1/2)mv2 and a rest energy mc2 (c is the speed of light). Is it dimensionally possible to add the kinetic energy and the rest energy?

2000

Approximately how many plump, juicy blueberries would fit in a 2 L soda pop bottle?

1200 cm2

Convert 0.12 m2 to cm2.

100

During a traffic jam, motorized vehicles are close together and not moving. In one instance, a traffic jam is one lane wide and 1 kilometer long, and the distance between adjacent vehicles is about the same as the length of one vehicle. Approximately how many motorized vehicles are in this traffic jam?

1.6

Following the rules for significant figures, what is the result of (1.4 kg) + (0.23 kg)?

1

How many significant figures are in the result of (1.5 m/s) x (3 s)?

5

How many significant figures are in the result of (77.860 m) x (40.722 s)?

decreased

If some quantity becomes one-fifth of what it was, then we say it _________ by a factor of 5.

increased

If some quantity quadruples, then we say it _________ by a factor of 4.

0.88

If something decreases by 12%, which of the following is the factor by which it is multiplied?

1.33

If something increases by 33%, which of the following is the factor by which it increased?

sin 90---cos 0 sin 60---cos 30 sin 45---cos 45 sin 30---cos 60 sin 0---cos 90

Match the following trigonometric functions that have the same value. sin 90 sin 60 sin 45 sin 30 sin 0

Sine--Opposite/hypotenuse Cosine--Adjacent/hypotenuse Tangent--Opposite/adjacent

Match the trigonometric function on the left with its definition on the right. Instructions Sine Cosine Tangent

describe the universe at the most fundamental level

Physicists seek to ______.

2 1 5 7

Select all of the following figures that are significant in the expression (1.7 kg) + (0.25 kg).

8

The power output (i.e., the rate at which electrical energy is generated) of a wind turbine is proportional to the wind speed cubed. If the wind speed doubles, by what factor does the power output increase?

(1 + 0.10)4 - 1

The rate P at which a star emits energy as electromagnetic waves is proportional to the fourth power of its absolute temperature T. Suppose a star's absolute temperature increases by 10.0%. Which of the following expressions represents the fractional increase in the rate P?

False

True or false: Leading zeros are significant.

True

True or false: More significant figures in a number means the measured value is known more precisely.

Length cubed per unit time

Volume flow rate is equal to the product of area and speed. Area has dimensions of length squared, and speed has dimensions of length per unit time. What are the dimensions of volume flow rate?

It makes patterns more apparent. It makes it easier to see how one variable is related to another.

What are some of the reasons for plotting a graph of data?

0.10 m 0.11 m

Which of the following are more precise? Answer all that apply.

0.100 m

Which of the following measurements is the most precise?

It is easier to see patterns in a graph.

Why is it important to graph data in a plot?