Answer:
you absolute buffoon Use Ohms' Law: V = RI
V = (1x10^3)(5x10^-3) = 5 volts
Yes, this is in the range of normal household voltages.
Explanation:
Answer: work
Explanation:
Often in physics, work is defined as the use of force to move an object. Technically, work is actually a change in energy caused by a force external to the system. The formula for work is W = F⊥d or W = FdcosΘ. Using this formula, we can see that work is just when a force is applied for a certain displacement. In simpler terms, that's just a force used to move an object a certain distance.
Energy is measured in units called joules.
answer: a. joules.
Answer:
Fuel cells convert energy from a fuel (usually hydrogen) into electricity, and advances in technology are bringing down costs. Fuel cells can use hydrogen produced from renewable electricity sources or be powered by other fuels, such as natural gas.
Explanation:
-- The maximum horizontal force without moving the crate
depends on the friction along the surface where the crate
meets the floor.
That force will be greater if the crate and the floor are both lined
with sandpaper, and it will be less if there is a layer of oil between
them. We don't know anything about those surfaces.
If ' μ ' is the coefficient of static friction between the crate and the floor,
then the force of friction acting opposite to a horizontal push is
( μ )·( mass )·( gravity )
= ( μ )·( 136 kg )·( 9.8 m/s² )
= 1,332.8μ Newtons.
A push less than this will not move the crate.
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-- " m/s² " is a unit of acceleration, not a unit of force.
Once the crate starts to slip, its behavior depends on the coefficient
of KINETIC friction between it and the floor, which we also don't know,
but this number is usually smaller than the static coefficient. So the
force of friction will decrease once the crate starts to slip, and you're
correct in expecting that it'll accelerate in the direction of the push,
even though the strength of the push doesn't change. Again, we
can't estimate the magnitude of the acceleration without knowing the
nature of the friction where the crate meets the floor.