Homework Week 7
1.Find the distance (in metres) traveled by a radio wave in 21.5 h.
s=ct=21.5 X (3.00 X 10^8m/s) X 3600= 2.32 X 10^13m
7.Find the frequency of a radio wave if its wavelength is 46.5 m.
F=c/l= (3.00 X 10^8) / 46.5= 6.45 X 10^6 Hz
Physics 204(O) Experiment 11
Object and Image Distances for a Thin Lens
What kind of image will you see through a convex lens? What factors might affect the size of the image?
It magnifies an image. The distance from the lens will af
Physics 204(O) Experiment 10
Light Intensity Versus Distance
1. How does the light intensity of a point source depend on distance?
The light intensity changes as an object moves farther from an object. It becomes less intense.
Physics 204 Experiment 6
Conservation of Momentum: Collisions
1. (1 point) Paste the Vx-time plot from phys204_lab6_inelastic1.trk here.
2. (4 points) Record the measured initial and final average velocities of the red cart and the initial
Physics 204(O) Experiment 9
Conservation of Energy: The Electrical Equivalent of Heat
The measured resistance of the heater is 10.1
The voltage applied across the heating resistor is 6.00V.
The power dissipated by the heating r
Physics 204(O) Experiment 8
Newtons Law of Cooling
How long does it take for a thermometer to reach the same temperature as that of its surroundings?
Approximately 3 minutes.
If I want my coffee to be as warm as possible, shoul
Physics 204(O) Experiment 7
Conservation of Energy (Falling Ball)
Part 1 Free Fall
1. Paste your position-time graph below.
2. Paste your velocity-time graph below.
Physics 204(O) Experiment 7 continued
Physics 204 Experiment 4
111Equation Chapter 1 Section 1
1. (1 point) Paste the Vy-time plot with fit for the ball below.
2. (3 points) Enter three values for the vertical acceleration of the ball from the fits and then
Physics 204 Experiment 5 (O)
Newtons Second Law
What happens to an object when you apply a net force to it?
The object accelerates in the direction of the net force.
What happens to the motion of an object if it has a constant
Physics 204(O) Experiment 3
Acceleration: Changing Motion
1. Paste your graphs from Step 1 (Constant Velocity Away) of the procedure here.
Physics 204(O) Experiment 3 continued
Physics 204(O) Experiment 2
There and Back: Concepts of Motion
1. Paste the first position-time graph below.
2. Describe the difference between a position-time graph made by walking slowly away from the
sensor and one made by walking away quick
Physics 204 Experiment 1
Measurement Laboratory Data Sheet
(20 points as marked)
1. (1 point) What is the precision of the caliper? It is an extremely precise measuring instrument.
The reading error is 1/20 mm = 0.05mm
2. (2 points) Record your measuremen
Homework Week 6
1.Change 344 K to degrees Celsius.
Tc= Tk 273= 344k -273= 71C
3.Change 5110C to degrees Fahrenheit.
Tf= 9/5Tc + 32= 9/5(5110) + 32= 9230F
9.Find the heat flow in 25.0 days through a freezer door 80.0 cm 144 cm insulated with
Week 4 Homework
1.How many joules are in one kilowatt-hour?
3600000= 3.6 x 10^6J
2. An endloader holds 1500kg of sand 2.00m off the ground for 3.00 min. How
much work does it do? 0
4. A 40.0-kg pack is carried up a 2500-m-high mountain in 10.0 h
Homework Week 3
1.A crate of mass 6.00 kg is moved by a force of 18.0 N. What is its acceleration?
a=F/m= 18.0N/6.00kg= 3.00 m/s^2
7. A truck pulls a trailer with a frictional force of 870 N and a coefficient of
friction of 0.23. What is the tra
Week 2- Homework
1.Solve F=ma for (a) m and (b) a.
(a) m= F/a
(b) a= F/m
3.Solve s=1/2(vf +vi)t for vf.
7.Given A=r^2, if A=15.0 m^2, find r.
A=r^2, Divide both sides by . Leaves us with A=r^2.
Then divide both sides by square root.
Homework Assignment 1
Give the metric prefix for each value:
1000 = k
Give the metric symbol, or abbreviation, for each prefix:
Write the abbreviation for each quantity:
45 milligrams = 45mg
Which is larger?
1 L or 1 m3