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Physics

Arthur Vargas

A firefighting crew uses a water cannon that shoots water at 25.0m/s at a fixed angle of 53.0 degrees above the horizontal. The firefighters want to direct the water at a blaze that is 10.0 m above ground level.

How far from the building should they position their cannon? There are two possibilities.

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Physics

Navarro

Sulfur oxides (SO2) are responsible for

A) global warming.

B) greenhouse gases.

C) producing acid rain.

D) destroying the ozone layer.

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Physics

Guest

During a collision between a photon and an electron, there is conservation of

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Physics

Guest

To produce change in motion, a force must be a (n)

A) balanced force

B) unbalanced force

C) frictional force

D) gravitational force

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Physics

Kaiden Cunningham

What is meant when Earth's systems are said to be "dynamic"?

they are all the same type

they are slow moving

they cannot be measured

they are constantly changing

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Physics

Beautiful

Which of the following statements about electrons is FALSE? Group of answer choices the closer an electron is to the nucleus, the more strongly the electron is attracted to the nucleus and therefore the more potential energy the electron has electrons are negatively charged electrons are attracted to nuclei by the positive charges of the protons in the nuclei two electrons may occupy the same electron orbital

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Physics

Priscilla Murray

Match each term to the appropriate definition

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Physics

Janet Lynn

A charge particle moving through a magnetic field experiences a magnetic force. What is the angle between the magnetic field and the force on the particle?

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Physics

Addison Bray

To which period in the periodic table does chlorine belong?

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Physics

Belen Davila

Bus A and Bus B leave school on a field trip when a stopwatch reads zero. Bus A travels at a constant 50 km/h, and Bus B travels at a constant 75 km/h. How far are the two buses from school when the stopwatch reads 1.5 h?. a ... Bus A is 76.5 km from school, Bus B is 51.5 km from school. c ... Bus A is 75 km from school, Bus B is 112.5 km from school. b ... Bus A is 112.5 km from school, Bus B is 75 km from school. d ... Bus A is 51.5 km from school, Bus B is 76.5 km from school

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Physics

Maya Branch

When observed from Earth, the wavelengths of light emitted by a star are shifted toward the red end of the

electromagnetic spectrum. Why does this redshift occur?

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Physics

Draven

Object A has a length of 3 cm, a width of 10 cm, and a height of 2 cm. Object B is dropped into a graduated cylinder. It displaces 60 mL of water. The volume of object A is:

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Physics

Bethany Maynard

Is the following sentence true or false? Some information about an object or process may be missing from a model.

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Physics

Haiden

If V is a velocity, l a length, and v a fluid property having dimensions of L2T-1, which of the following combinations are qualitatively dimensionless (show work for a through d) : (a) V l v (b) Vl/v (c) V2v (d) V / (l v)

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Physics

Binky

What happens to the total mechnical energy of the apple as it falls from the tree?

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