PHYSICS SEMESTER 1 REVIEW

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1 point

The fundamental SI (base) unit for time is the ________.

minute

hour

second

day

1 point

In calculating speed, a person correctly puts 54.235 meters in a calculator (since distance was measured to the nearest millimeter) for distance, and divides that by 13.0 seconds for time (since time was measured to the nearest tenth of a second by a stopwatch). What is the actual speed that should be recorded for these measurements?

4.2 m/s

4 m/s

4.17 m/s

4.1719 m/s

1 point

What is 3.412 x (1287 ÷ 0.004781) expressed in scientific notation?

9.185 x 10^5

2.692 x 10^5

0.9185

1.089 x 10^-6

1 point

Solve the following equation for x:

3x - 2 = 8x + 3

x = 1

x = 0.5

x = -1

x = 2

1 point

Find the equation x = at + b that fits the following data:

t(sec) 0 2 4 6 8 10
x (m) 20 90 160 230 300 370

x = 35t + 20

x = 35t + 15

x = 45t + 20

x = 25t + 45

1 point

The mathematical formula for average speed is: S = d/t

Where S = speed in m/s d = distance travelled in meters and t = time elapsed in seconds

Which of the following correctly rearranges this formula to solve for d when S and t are known?

d = d/S

d = S/t

d = St

d = t/S

1 point

Calculate the total mass of the following objects, each measured on a different instrument:

3570.0 g + 2.54 g + 0.07225 g

3570 g

3572.61 g

3573 g

3572.6 g

3572.61225 g

1 point

If a triple beam balance has one bar indicating every 100 grams, a second bar indicating every 10 grams, and a third bar showing every single gram with 10 marks between each number, what is the precision of this triple beam balance?

Cannot be determined from information given

±0.1 g

±0.5 g

±0.01 g

±0.05 g

1 point

The density of an alloy is 5000 kg/m^3. What is the density in g/m^3?

5,000,000

5000

50,000

5.000

10.

1 point

To be dimensionally consistent, the formula
VELOCITY = FREQUENCY X WAVELENGTH
must be related as follows (where velocity is in m/s; frequency is in 1/s; and wavelength is in m):

velocity = frequency x wavelength

velocity = frequency ÷ wavelength

velocity = frequency^2 x wavelength

velocity = frequency ÷ wavelength^2

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