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Physics

Priscilla

A crying baby emits sound with an intensity of 8.0 * 10-8 w/m2. calculate a reasonable estimate for the intensity level from a set of quintuplets (five babies), all crying simultaneously at the same place? the lowest detectable intensity is 1.0 * 10-12 w/m2.

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Physics

Louis Guerra

Which of the following correctly describes magnetic poles.

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Physics

Dakota Wallace

Part C

At what speed does the wreckage move if one car was driving north and one east?

Express your answer to two significant figures and include the appropriate units.

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C

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Physics

Sheldon Pennington

How are kyanite crystals formed

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Physics

Hanna

Which rocky planet has the strongest magnetosphere?

A) Mars

B) Earth

C) Mercury

D) Venus

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Physics

Carley Cisneros

Which of the following is the correct SI unit measuring amount of material contained in a solid sphere

Kilograms

Tons

Ounces

Pounds

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Physics

Guest

Consider a particle with initial velocity v⃗ that has magnitude 12.0 m/s and is directed 60.0 degrees above the negative x axis. What is the x component v⃗ x of v⃗? What is the y component v⃗ y of v⃗?

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Physics

Jamison Steele

Which is heavier, the earth or the moon

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Physics

Guest

if the separation between two masses is doubled, does the gravitational force between them increase or decrease? By what factor?

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Physics

Teresa

A model rocket is fired vertically upward from rest. Its acceleration for the first three seconds is a (t) = 66 t, at which time the fuel is exhausted and it becomes a freely "falling" body. 15 seconds later, the rocket's parachute opens, and the (downward) velocity slows linearly to - 23 ft/s in 5 s. The rocket then "floats" to the ground at that rate.

Determine the position function s and the velocity function v (for all times t).

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Physics

Kasen Brennan

If a man walks 17m east and then 17m south, the magnitude of the man's displacement is

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Physics

Ezra Underwood

Which type of mass movement makes a pattern of wrinkles, or terraces, on hillsides?

landside

mudflow

soil creep

rock slide

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Physics

Ariana Odonnell

How is sun related to nuclear, electromagnetic, and heat energy?

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Physics

Anabelle Briggs

Studies of gymnasts show that their high rate of injuries to the Achilles tendon is due to tensions in the tendon that typically reach 12 times body weight. That force is provided by a pair of muscles, each exerting a force at 23 ∘ to the vertical, with their horizontal components opposite.

For a 53-kg gymnast, find the force in each of these muscles.

Express your answers using two significant figures separated by a comma.

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Physics

Jewel Montes

The total mechanical energy of a system: A) can never be negative. B) is constant, if only conservative forces act. C) is either all kinetic energy or all potential energy, at any one instant. D) is not uniquely determined for most naturally occurring systems. E) is equally divided between kinetic energy and potential energy.

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