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Physics

What type of organic molecule is this?

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Yasmine Montoya

Physics

A 39.5 kg child stands at the center of a 125 kg playground merry-go-round which rotates at 3.10 rad/s. If the child moves to the edge of the merry-go-round, what is the new angular velocity of the system? Model the merry-go-round as a solid disk

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Malia Gillespie

Physics

What is the area of a square with sides measuring 4 meters

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Physics

Suggest possible explanations why reaction times are different for different people?

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Phoenix Fitzgerald

Physics

We can see because light is A) absorbed. B) diffracted. C) reflected. D) refracted.

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Physics

Nami conducts an investigation on plants. She places a grow light on a timer to give the plants different amounts of light to see if this would affect their growth. Which term describes the amount of light in this investigation? hypothesis control variable dependent variable independent variable

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Physics

Hi guys. Im doing a project at school where we have to create a mouse trap powered car. I wanted to know what materials are a must have to make the car move more than 5 meters?

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Physics

Diego is playing basketball. while running at 7 km/h toward a basketball hoop, he throws the ball at the net. the ball travels at 20 km/h. what is the speed of the ball relative to the net?

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Nathalie Strickland

Physics

How does carbon dioxide affect the atmosphere

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Physics

When an 81.0-kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.25 103 j. by how much does the potential energy of a (n) 17.5-kg child increase when the child climbs a normal staircase to the second floor?

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Physics

The steam created from the boiler turns a turbine. What type of energy conversion does this represent?

chemical energy to heat energy

heat energy to mechanical energy

steam energy to kinetic energy

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Physics

An astronaut goes out for a space walk. Her mass (including space suit, oxygen tank, etc.) is 100 kg. Suddenly, disaster strikes and her tether line becomes disconnected, so she is stuck at rest a distance x away from the space craft!

Luckily, you have to know physics to be an astronaut. The astronaut takes off her 15 kg oxygen tank and throws it away from the spacecraft with a speed of 10 m/s. Due to conservation of momentum, she is propelled towards the spacecraft.

The astronaut has 1.5 minutes of oxygen remaining in her space suit to get her back to the craft. What is the maximum distance the astronaut can be away from the spacecraft to make it back before she runs out of oxygen?

Part A: What are the Known Variables and Unknown Variables? list them.

Part B: What are the equations needed to solve this problem?

Part C: Solve the problem.

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Physics

What would happen if cell membranes suddenly became permeable instead of selectively permeable could cells remain alive?

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Physics

2. Which of the following is closest to 1 meter in length?

A. a penny

B. the width of a door

C. the height of a room

D. the size of the Earth.

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Physics

The SI unit for energy is the Joule (J). Sam wants to convert 338.25 J into kJWhich operation should he choose?

a. He should multiply 338.25 by 10.

b He should multiply 338.25 by 100.

c He should divide 338.25 by 100.

c He should divide 338.25 by 1000.

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