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DariaV
Questions (24)
If the speed of sound is 1100 feet per second and a tuning fork oscillates at 440 cycles per second, what is the wavelength of
1 answer
1,245 views
The potential difference across the terminals of a storage battery not connected in any circuit is observed to be 12 V. When it
2 answers
2,220 views
Two equal charges repel one another with a force of 4.0 x 10-4 N when they are 10 cm apart. If they are moved until the
1 answer
2,099 views
A boat floating in a large pool and displaces 25 liters of water. What is the buoyant force on the boat.
1000 liters = 1 m3
1 answer
1,151 views
An ice cube of mass 100 g and at 0C is dropped into a Styrofoam cup containing 200 g of water at 25C. The heat of fusion of ice
0 answers
1,322 views
While studying for this quiz you realize that you still have 100 g of lukewarm coffee at 40°C left in a paper cup. When you
1 answer
3,045 views
A standing wave on a string has a velocity of 42 m/s and a period of 0.01 s. What is the frequency of the wave?
1 answer
497 views
A sound wave has a length of 0.66 meters. If the frequency of the wave is 512 Hz (high C), what is the wave velocity?
1 answer
706 views
A wave on a rope has 6 nodes, including one at each end. If the wave train or system of waves is 5 meters long, what is the
2 answers
685 views
When needed, use 340 m/s for the speed of sound and 3.00 x 108 m/s for the speed of light.
A hiker determines the length of a
1 answer
766 views
A light bulb with a resistance of 3.0 ohms has a voltage difference of 6.0 V across its leads. What is the current through the
2 answers
1,077 views
Three different size lights are running off a low voltage system. The resistance of the three lights are R1 =3 ohms, R2 = 9
3 answers
1,525 views
An i Pod draws about 3.7 volts (i Pod batteries are rated for 3.7 volts and 1200 mAhours.) Ignore the internal resistance of the
3 answers
1,117 views
Two equal charges repel one another with a force of 4.0 x 10-4 N when they are 10 cm apart. If they are moved until the
1 answer
877 views
A hydraulic jack has an input piston that is 1.2 cm2 in area and an output piston that is 144 cm2 in area. How much input or
1 answer
2,485 views
There are 40 ml of air in a large syringe. With the exit hole plugged, you squeeze the air down to about 10 ml. If the original
1 answer
1,361 views
A fireman's water hose has a diameter of about 4.0 inches. The water is flowing through it at about 14.0 m/s. The nozzle's
2 answers
1,676 views
The volume of air in a balloon is 4.5 liters when inflated. External pressure decreases the volume to 1.1 liters. If the
2 answers
1,348 views
A steel rod is 2.55 cm long at 16 o C in an operating room. It is placed in a patient's leg where it rises to 37 o C. What will
2 answers
1,277 views
A hydraulic device is used to lift the bucket of a backhoe. The input is a round cylinder that is 1.0 cm in radius. The output
1 answer
1,413 views
Calculate the change in temperature that would shrink a room-temperature balloon to one-half its size. Vo is 10 Vf is 5
4 answers
1,273 views
1/2 = α Delta T
what is this?
3 answers
614 views
If you put a balloon in a warm oven and assume the balloon cannot pop. Will the the balloon continue expanding forever or will
2 answers
611 views
Physical therapists know as you soak tired muscles in a hot tub, the water will cool down as you heat up. If a 68.1 person at
1 answer
907 views
Answers (11)
so 1/2=.5 OHM
so the answer is 2m? 5/6 =.83?
2.0 AMPS!
I=R/V 1.67A? Right?
.31 A?
I got it 350 m/s
my book says that is what the expansion coefficient is for steel
so using Charles' law
sorry this : α what does that symbol mean?
room temp is 20 C right?
When the pressure inside the balloon is equal to pressure outside the balloon. I'm not sure the other reason.
