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Physics

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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Physics

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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Physics

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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Physics

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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Physics

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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Physics

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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Physics

Raegan Flores

What is the difference between a battery losing charge (discharging) and a capacitor losing charge (discharging) ?

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Physics

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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Physics

Van

Why do a circulatory system is important in meeting the needs of all cells throughout an animals body

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Physics

Alfredo

What qualifications do you need to be a research scientist?

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Physics

Matthew

If the pressure inside a rubber balloon is 1500 mmhg, what is this pressure in pounds-force per square inch (psi)

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Physics

Freddy Rowe

Which is the only mechanism that can introduce new alleles in a gene pool? genetic drift random mating mutation

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Physics

Yael Boyer

A boulder and a pebble are sitting on a cliff, which has greater gravitational potential energy and why? A cheetah and a person are racing, both has the same mass, which has a greater kinetic energy and why?

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Physics

Elias Cooper

What is the slope if an object comes to a stop then remains at rest?

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Physics

Memphis Bernard

Positive charge Q is placed on a conducting spherical shell with inner radius R1 and outer radius R2. A particle with charge q is placed at the center of the cavity. The net charge on the inner surface of the conducting shell is

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