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Physics

Mccall

A propeller blade at rest starts to rotate from t = 0 s to t = 5.0 s with a tangential acceleration of the tip of the blade at 3.00 m/s2. The tip of the blade is 1.5 m from the axis of rotation. At t = 5.0 s, what is the total acceleration of the tip of the blade?

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Physics

Juliet

Describe the composition of the nucleus of an atom.

Question 2 options:

It is composed of protons.

It is composed of protons and neutrons.

It is composed of protons and electrons.

It is composed of protons, neutrons, and electrons.

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Physics

Zoey Clements

What does the three gorges dam produce?

a. electricity from wind power

b. electricity from water power

c. electricity from coal

d. electricity from natural gas

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Physics

Josie Ward

Light passes from a material with index of refraction 1.25 to one with index of refraction 1.72. The angle of incidence is 34.3°. What is the angle of refraction?

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Physics

Veronica Beard

How tall would a tower need to be if the period of a pendulum were 30. seconds

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Physics

Esther Rhodes

0.100kg of a nuclear is converted to energy per day. What is the power produced by this fuel?

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Physics

Guest

When do the centre of gravity and center of mass of an object coincide?

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Physics

Timothy Cantrell

Your employer asks you to build a 18-cmcm-long solenoid with an interior field of 5.8 mTmT. The specifications call for a single layer of wire, wound with the coils as close together as possible. You have two spools of wire available. Wire with a #26 gauge is 0.41 mm in diameter and can carry up to 1 A. Which wire should you use, and what current will you need?

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Physics

Elliott

A block of an unknown metal has a mass of 145 dg and a volume of 2.3 cm3. what is the density of the unknown in units of g/ml?

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Physics

Marquis Sampson

Two pots are filled with boiling water. The pots are exactly the same size, but one pot is white and the other is black. Which pots cools faster?

a. The black pot.

b. The white pot.

c. Neither-they both cool at the same rate.

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Physics

Guest

Up-regulation involves the loss of receptors and prevents the target cells from overreacting to persistently high hormone levels. True or False

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Physics

Donovan Kent

In your own words, explain how stalagmites are formed in caves.

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Physics

Leland Mathews

How do ants use formic acid to stay alive

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Physics

Leo Wong

Which of the following is not a greenhouse gas?

water

carbon dioxide

nitrous oxide

propane

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Physics

Nigel Pierce

True or false. When populations do not exceed their environment carrying capacity biology communities are stable?

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