Waves
What is the power output of a machine that lifts a 4.3 kg object 10 m in 5.2 s?
What is 8.3 W
A singer shattering a glass with his or her voice is an example of
resonance
What is the difference between a conductor and an insulator?
A conductor has freely roaming electrons, an insulator holds tight to its electrons.
What is the resistance of a circuit with two 5 ohm resistors in series?
The distance that a wave repeats itself is called__________________________
What is wavelength
In which of the following scenarios is work being done? a) a cowboy spins a lasso above his head
b) a man pushes a shopping cart down the aisle
c) a woman carries a bucket of water on her head 30 m
What is shopping cart
Light that travels from air into a medium with higher index of refraction will bend toward or away from the Normal?
Toward
3 ways to charge and object.
Friction, conduction, and induction
What is the resistance of a circuit with two 5 ohm resistors in parallel?
2.5 ohms
An ambulance approaches you the frequency of the sirens that you hear is ________________ than the actual frequency of the sirens
greater
What is the total mechanical energy of a 3.9 kg bouncy ball at a 8.7 m height traveling 13.2 m/s?
What is 672 J
Determine the wave length of a closed tube organ pipe that has a length of 2.0m, and the speed of sound is 340 m/s.
8 meters
An electroscope is charged positively, as shown by foil leaves that stand apart. As a negatively charged rod is brought close to the electroscope, what happens to the leaves?
The fall closer together
What is the power ouput of a circuit that has a 12 V battery attached to it and a 10 ohm resistor?
What is 14.4 W
A 5 meter long string vibrates with a waveform with 8 nodes. How long is one wavelength?
1.4 meters
How much work is done if 370 N are applied to pulls a bus 47 m.
What is 17,390J
Two different ways to describe a sound wave
What are Mechanical and Longitudinal?
Why do we get shocked after dragging our feet on carpet?
The electrons are rubbed onto you, and then jump off when you touch a conductor.
3 bulbs are connected in parallel. When you unscrew one bulb, what happens to the other two?
They get brighter.
A wave travels through one spring with a speed of 9.0 m/s and a wavelength of 0.42 m. What is its wavelength as it hits a new spring at a speed of 4.3 m/s?
What is 0.20 m
A bungee jumper starts at rest at a 190 m height. He falls off the bridge. What height is he at when he is traveling 25.6 m/s?
What is 156 m.
cyan light shines on a yellow dress. what color is reflected
green
A rubbed balloon will stick to a wooden wall. Explain why.
Charges in the wall were polarized.
3 resistors - 5 ohms, 10 ohms and 20 ohms - are connected in parallel to a 12V battery.
a) What is the total equivalent resistance?
b) What is the current trough the 10 ohm resistor?
a) 2.86 ohms
b) 1.2 A