Physics » Page 96

Physics

Camilla Murray

The rate at which light energy is radiated from a source is measured in which of the following units?

A. Lumen

B. Candela

C. Lux

D. Angstrom

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Physics

Gloria Molina

How are water bottles recycled?

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Physics

Izabella Allison

The electromagnetic waves that have the lowest frequency is called

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Physics

Austin Boone

A bullet is fired horizontally with an initial velocity of 144.7 m/s from a tower 11 m high. if air resistance is negligible, what is the horizontal distance the bullet travels before hitting the ground?

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Physics

Andrea Mccoy

A 0.2 kg conductor of length 0.8 m carries 2 ampere current to the right in a magnetic field. What is the magnitude and the direction of the magnetic field acting on the conductor if the net force on the rod is zero? (Assume that the rod is hung by two insulating supports.)

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Physics

Marcus Francis

A model rocket with a mass of 0.181 kg is launched into the air with an initial speed of 92 m/s. How much kinetic energy will the rocket have at a height of 164 m? Assume there is no wind resistance.

303 J - 747 J - 634 J - 444 J

I have tried taking the initial KE with 1/2*.181*92^2 and subtracted the final potential energy. 181*9.8*164. This gets me 475, which isn't any of the choices. I picked 444 J since it was the closest, but it was wrong.

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Physics

Chris Greene

Which factors improve soil fertility? Select the three correct answers.

A. Artificial fertilizer

B. High pH

C. Water

D. Bedrock

E. Nitrogen-fixing bacteria

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Physics

Aliyah Leach

What is the change in internal energy if 60 J of heat are added to a system

and the system does 40 J of work on its surroundings? Use AU = Q-W.

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Physics

Amari Odonnell

Maintenance in NFPA 70E is intended for preserving or restoring the condition of electrical power systems equipment or devices for?. Electrical safety is directly tied to the? of electrical power systems equipment.

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Physics

Derick Wells

If the mass of the spacecraft were doubled, how much would the force of gravity would change?

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Physics

Meghan Jensen

Emotional abuse is less harmful than physical abuse.

a. True

b. False

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Physics

Reynaldo

A 21.6-kg cube made from aluminum is at its melting temperature of 660℃. If you were to add 8000 kJ worth of energy as heat, what percent of the block melts? You might need the following: α = 23.0 ✕ 10-6 K-1, β = 69.0 ✕ 10-6 K-1, c = 900 J/kgK, LF = 3.98 ✕ 105 J/kg

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Physics

Paula Luna

What are all of types of radiation the sun produces?

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Physics

Mckenna Fitzgerald

Can all waves be distorted, deflected, or changed? Explain your response.

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Physics

Duncan Castillo

Compare the momentum of a 6,300-kg elephant walking 0.11 m/s and a 50-kg dolphin swimming 10.4 m/s. your answer

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