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Physics

Paige Hayden

What is an example of 'Centre of Gravity'?

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Physics

Jacqueline Waller

The Mass number of an element is the?

A. number of protons plus electrons

B. number of protons only

C. number of protons plus neutrons

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Physics

Guest

Momentum of a system is conserved only when question 16 options: there are no internal forces acting on the system. the system is not moving. there are no forces acting on the system. there is no net external force acting on the system. the system has zero momentum.

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Physics

Gabriella James

what is the necessary condition on a force the result the conservation of angular momentum for a particle affected by that force?

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Physics

Bits

How to find voltage reading?

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Physics

Kelly Harrell

A brick moves across a rough surface at constant velocity. Which of the following are forces that should be included in a free body diagram? (select all that apply) gravity friction applied force force of motion

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Physics

Donovan Nguyen

A 20kg cannonball is fired into a stationary 500kg boulder at on the edge of a 125m high cliff. If the cannonball remains in the boulder and together they land 140m horizontally from the edge of the cliff, what was the initial speed of the boulder?

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Physics

Emanuel Frederick

According to the law of refraction, light passing from air into a piece of glass at an angle of 30 degrees will cause the light to

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Physics

Tabitha Richard

At any angular speed, a uniform solid sphere of diameter D has the same rotational kinetic energy as a uniform hollow sphere of the same diameter when both are spinning about an axis through their centers. The moment of inertia of a solid sphere is :

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Physics

Ferris

A body will maintain a constant negative electrostatic charge if the body

A) maintains the excess of electrons

B) continously receives more protons than it loses

C) continuously receives more electrons than it loses

D) maintains the same excess of protons

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Physics

Creedence

Which statements describe the results of the effect of angle of insolation on absorption experiment? Check all that apply.

At 3 minutes, the soil temperature at a 0° angle of insolation is higher than at 90°. At 6 minutes, the soil temperature at a 45° angle of insolation is higher than at 0°. At 9 minutes, the soil temperature at a 90° angle of insolation is lower than at 45°. At 12 minutes, the soil temperature at a 45° angle of insolation is lower than at 0°. At 15 minutes, the soil temperature at a 90° angle of insolation is higher than at 45°.

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Physics

Hana Davies

A cat jumps off a table which is 1.5 m high. If the initial velocity of the cat is 10 m/s, at an angle of 37 degrees above the horizontal, how far from the edge of the table does the cat land?

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Physics

Ashanti Norris

How many water

molecules does the hydrate

LINO, •H2O have?

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Physics

Enrique Bean

the time of a collision experienced by a driver is 0.1 seconds without an air bag, with an air bag this is increased to 0.5 seconds. Explain the benefits of this detail

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Physics

Kingston Goodwin

1. Some wooden rulers do not start with 0 at the edge, but have it set on a few millimeters. How could this improve the accuracy of the ruler?

2. You find a micrometer that has been badly bent. How would it compare to a new, high-quality meter stick in terms of precision? Its accuracy?

3. Does parallax affect the precision of a measurement that you make? Explain.

4. A box has a length of 18.1 cm and a width of 19.2 cm and it is 20.3 cm tall.

a. what is the volume?

b. how precise is the measure of length? Of volume?

c. How tall is a stack of 12 of these boxes?

d. how precise is the measure of the height of one box? Of 12 boxes?

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