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PHYSICS SEMESTER 1 REVIEW
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1.
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^2 x wavelength
velocity = frequency x wavelength
velocity = frequency ÷ wavelength^2
velocity = frequency ÷ wavelength
2.
1 point
The density of an alloy is 5000 kg/m^3. What is the density in g/m^3?
5000
5,000,000
50,000
5.000
3.
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?
±0.5 g
Cannot be determined from information given
±0.1 g
±0.01 g
±0.05 g
4.
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
3573 g
3572.61 g
3572.61225 g
3572.6 g
3570 g
5.
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 = St
d = t/S
d = S/t
6.
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 = 25t + 45
x = 45t + 20
x = 35t + 15
7.
1 point
Solve the following equation for x:
3x - 2 = 8x + 3
x = -1
x = 0.5
x = 2
x = 1
8.
1 point
What is 3.412 x (1287 ÷ 0.004781) expressed in scientific notation?
9.185 x 10^5
0.9185
2.692 x 10^5
1.089 x 10^-6
9.
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
4.1719 m/s
4.17 m/s
10.
1 point
The fundamental SI (base) unit for time is the ________.
hour
day
minute
second
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