PS 300 American River College Math Calculations Scientific Measurements Exercises Please completely answer questions 1 – 17 on the attached review sheet. A

PS 300 American River College Math Calculations Scientific Measurements Exercises Please completely answer questions 1 – 17 on the attached review sheet. All work, every step, must be shown for all calculations. Finally, please site all sources used, if needed. 1. A 720N man climbed a staircase that was 12 meters high in 6.5 seconds. Find : a) his mass in kg
b) The work he performed during the climb c) The Potential Energy he gained. d) The power, in watts, generated.
2. Convert 25 m/s to mph (1609m = 1 mile)
3. a) Write 0.845 in standard scientific notation.
b) Write 124 x 10 4 as a whole number.
4. If you speed up on you bike from 2.4m/s to 21m/s in just 9.3 seconds calculate your acceleration.
5. If you were to scuba dive to depth of 55 meters what pressure , in Pascal, would you experience?
(recall 1 atm = 101.3kPa and 10m of water = 1 atm)
6. What is the Impulse when a force of 60N is applied in 4.5 seconds?
7. A lunar rock sample has a density of 3.7 g/cm3. If the volume of the sample is 3 cm3, what is the mass of the sample?
8. What momentum does a 19 kg bike have moving at 21.5 m/s?
9. A Big Mac has 1520kcal of energy. How many Joules is this?
10. A 38-volt battery is connected to three parallel light bulbs.
Diagram and label a schematic diagram for the circuit.
Calculate the current (I) if the total resistance of the circuit is 15 ohms.
Calculate the power in Watts if the supplied voltage drops to 33 volts.
11. Diagram and label a Solar and Lunar eclipse.
12. Find the number of nuclear particles in the following elements:
Protons :
Br _____ Fm _____
Neutrons :
Br _____ Fm _____
Electrons :
Br _____ Fm _____
13. For a wave traveling at a velocity of 255 m/s with a frequency of 122Hz what must the wavelength be?
14. A wave with a frequency of 496Hz has a period of how many seconds? (decimal answer)
15. How many grams are required to make a 5.5 molar solution of:
CaCl2 _____g
CH4 _______g
16. Write a balanced nuclear equation for the following Alpha decays:
Thorium – 236
Po – 210
17. The star Polaris has a magnitude of 2. If the star Prosion has a magnitude of 5. Which one is brighter? The magnitude
difference between the two is how many times brighter or dimmer?
Formulas and Constants:
g(acceleration due to gravity) = 9.8m/s2
4.18J = 1cal
Velocity = distance/time
Velocity = wavelength x frequency
Frequency = 1/Period
acceleration = velocity/time
Voltage = current x resistance
Work = Force x distance
Power = work/time
Density = mass/volume
Force = mass x acceleration
Momentum = mass x velocity
Pressure = force/area
PE = mass x g x height
c(speed of light)= 3x108m/s
Impulse = Force x Time

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