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Braeden Peters
When a fluid is heated, what changes occur?

It becomes less dense and begins to rise.

It becomes more dense and begins to rise.

It becomes less dense and begins to sink.

It becomes more dense and begins to sink.
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Jarrett Bates
Which of the following accurately describes properties of valence?

A. The greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom.

B. Metals tend to have a negative valence and tend to be electron borrowers.

C. Nonmetallic elements tend to have a positive valence and tend to be electron borrowers.

D. The smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom.
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Cello
A rectangular tank 7 m wide is layered with 8 m of oil (rho = 880 kg/m3), 6 m of water, and 4 m of mercury (rho = 13,600 kg/m3). The tank is surrounded by air at atmospheric pressure and the top is open. Calculate the total force on the side of the tank.
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Marques Stevenson
Brainiest what is Igneous rock made up of
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Mugsy
Which of the following is a good emitter of radiant energy? clear glass window, a mirror, air, an asphalt road, snow
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Brent Blankenship
A liquid has a specific gravity of 1.1 at room temperature. what is its density at room temperature kg/m3
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Karen Dunlap
Suppose earth were moved to a distance from the sun equal to 4 AU. How much weaker would the sun's gravitational force on earth be? Why?
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Nehemiah Bailey
A scientist wants to learn more about differences in motion of objects both on the planet earth and on the planet mars. What branches of science should he study?
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Frank Goodman
Consider a 150-w incandescent lamp. the filament of the lamp is 5-cm long and has a diameter of 0.5 mm. the diameter of the glass bulb of the lamp is 8 cm. determine the heat flux, in w/m2, (a) on the surface of the filament and (b) on the surface of the glass bulb, and (c) calculate how much it will cost per year to keep that lamp on for eight hours a day every day if the unit cost of electricity is $0.08/kwh.
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Akira Copeland
According to Special Relativity, which statement is true: 1. The linear dimension of an object is the same in any two inertial systems 2. The linear dimension of an object is shorter in a system that uses two clocks 3. The linear dimension of the object depends on the acceleration due to gravity 4. The linear dimensions of all objects have bean determined by Einstein 5. None of the above
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Jakobe Chambers
which of the following are good conductors under normal conditions? A. Penny B. copper wire C. a dime D. plastic E. aluminum foil F. water
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Alyson Marshall
Which example involves the transformation of chemical energy directly into light energy?

A) a wind mill

B) a glow stick

C) photosynthesis

D) a hydroelectric dam

(I'm pretty sure it's b, but just want to make sure)
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PhysicsPhysics
Guest
What is heat?

A. A measure of the movement of molecules inside an object

B. The transfer of energy from a hot object to a cold object

C. The force exerted on an area by an object

D. A measure of mass per unit volume of an object
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Raegan Flores
What is the difference between a battery losing charge (discharging) and a capacitor losing charge (discharging) ?
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Astro
When you squeeze the rubber bulb of a perfume atomizer how do you change the air pressure at the top of the tube
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