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Physics

Chelsea Montgomery

In a series circuit, the voltage across the circuit is always equal to

a. the voltage across one of the bulbs.

b. the sum of the voltages across each bulb.

c. half the sum of the voltages across each bulb.

d. two times the sum of the voltages across each bulb.

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Physics

Priscilla Chandler

The chord sung by the three Roche sisters in the aliasing demonstration in class was B flat major, consisting of the notes Bflat4, F4, and D4 ("4" refers to the fourth octave on the piano). The frequencies corresponding to these notes are 466.16 Hz, 349.23Hz, and 293.66Hz. Assume each singer's voice contains very strong second and third harmonics in addition to the fundamental pitch. If sampled at 1600 samples per second (way too slow!), what frequencies would appear in the range 0Hz - 800Hz? This is the range that would be retained by a lowpass filter when reconstructing the signal from the samples. (Note: the 2nd harmonic is twice the fundamental frequency; the 3rd harmonic is three times the fundamental. This is a little different from the way "partials" often are numbered.)

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Physics

Madelynn Huffman

1) Harold pushed a 10 kg box to the right with 7 Newtons of force. Jerome pulled the same box to the right with 7 Newtons of force. Are the forces on the box balanced? Will the box accelerate?

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Physics

Reilly Mack

9. How are the fossils in question 8 formed?

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Physics

Kayden Alexander

A skier slides horizontally along the snow for a distance of 12 m before coming to rest. the coefficient of kinetic friction between the skier and the snow is μk = 0.060. initially, how fast was the skier going?

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Physics

Jenny Berry

Been on this problem for 2 hours now:

Four identical springs support equally the weight of a 1150kg car.

If a 91kg driver gets in, the car drops 6.8mm. What is k for each spring?

The car driver goes over a speed bump, causing a small vertical oscillation. Find the oscillation period, assuming the springs aren't damped.

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Physics

Sharon Huynh

How far would a baseball travel in 0.5 s if it is thrown at a speed of 20 m/s?

40 s

10 m

O 10s

40m

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Physics

Keyon

What is the total momentum of the system after the collision

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Physics

Xiomara Hobbs

Compare the advantages and disadvantages of buying compact fluorescent bulbs rather than filament bulbs (6 marks)

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Physics

Damari Odonnell

Calculate the volume of this regular solid.

A cylinder labeled B at the top, 13 centimeters high with a radius of 4 centimeters.

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Physics

Rylan Levine

If your mass, the mass of Earth, and the mass of everything in the solar system were twice as much as it is now, yet everything stayed the same size, your weight on Earth woulda. quadruple. b. be the same. c. double. d. be eight times as much as now. e. none of the above

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Physics

Nathan Mccarthy

In what regions of the electromagnetic spectrum is the atmosphere transparent enough to allow observations from the ground?

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Physics

Jazmin Bean

If the buoyant force is less than an object's weight, the object?

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Physics

Julie Hutchinson

Your go-cart breaks down right before the end of a race, so you have to push it over the finish line. The go-cart has a mass of 85 kg.

a. What is the weight of your go-cart?

b. How much force must you apply to give the go-cart an acceleration of 0.9 m/s^2

c. If you push with a force of 350 N, what is the acceleration of the cart?

d. Later, you are driving your friend's go-cart. If his cart has an acceleration of 5.5 m/s^2 and the cart's engine is applying a forward force of 720 N, what is the mass of his go cart?

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Physics

Rivers

The liquid contained in batteries that conducts electric charge is called the: solution, electrolyte, suspension, colloid

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