a bullet of mass 40 gm is fired from a gun of mass 8 kg with a velocity of 800 m/s, calculate the recoil velocity of gu

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Fill in the term that completes the statement.The current that we use in our homes iscurrent
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Placing ice on a sprained ankle this is an example of conduction, convection, radiation?

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Conduction because that’s when energy transfers by two things touching each other

Solar cells convert what type of enegry into electrical enegry

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Solar cells convert Electromagnetic into electrical energy

Light cells?
If you are referring to solar panels, these convert light energy into electrical energy. They do so by generating “DC” (Direct Current) electricity from the light.This electricity is fed into a solar inverter that converts into “AC” (Alternating Current) electricity.The AC electricity is used to power appliances in your home.

How long does water evaporation take? What factors influence it?

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there is no certain time on how long it takes. Because the factors will always be different and the factors heavily affect the evaporation time. Some factors include: humidity, heat, how the sun is visible (whether clouds are covering it or not)

There is not any fix time for evaporation...every liquid has different boiling point....when any liquid boils completely then it start evaporating.

Six factors that influence evaporation are :-
(1) Wind assists evaporation
(2) Heat assists evaporation
(3) Increase in surface area exposed assists evaporation
(4) Dryness assists evaporation
(5) Rate of evaporation depends upon the nature of the liquid
(6) Vapor pressure

A unit of power equal to 746 watts is a(n)__

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1 Horsepower.
A Horsepower = 746 watts

Tamika inflates and ties off a balloon in her classroom and then takes it outside on a cold, winter day. Immediately, she notices that the balloon has gotten a little bit smaller. Why does this occur?A) because there are fewer molecules in the balloon outside
B) because the air pressure is significantly higher when it is colder
C) because the molecules in the balloon have slowed down with the temperature
D) because the molecules shrink in size when exposed to the colder, outside air

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The balloon has gotten a little bit smaller C) because the molecules in the balloon have slowed down with the temperature.

Answer: Option (C) is the correct answer.

Explanation:

When the balloon was placed inside Tamika's classroom then the temperature was high as compared to the temperature outside the classroom.

As a result, gas molecules were in rapid motion but when balloon was placed outside the classroom then due to cold, there was decrease in temperature.

Therefore, the movement of gas molecules will slow down and the molecules will come slightly close to each other.

Hence, there will be shrinkage in the size of balloon.

Thus, we can conclude that the balloon has gotten a little bit smaller because the molecules in the balloon have slowed down with the temperature.

What does the symbol Li+ represent?

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it means lithium ion.
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a request of help for an exam test.

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N a nuclear reaction, mass must be lost to produce energy. true or false

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Recall that the height of an object t seconds after it begins moving when gravity is the only force acting on the object is given. h(t)=-16x^2 + v0t + h0. h(t) is given in feet. v0 = initial velocity of object in ft/sec. ho= initial height of object in feet. If the feather is dropped from the top of the bridge 90 feet above a river, how long does it take the feather to reach the water?

A 1.00-L bulb and a 1.50-L bulb, connected by a stopcock, are filled, respectively, with argon at 0.75 atm and helium at 1.20 atm at the same temperature. Calculate the total pressure and the partial pressures of each gas after the stopcock has been opened and the mole fraction of each gas. Assume ideal-gas behavior.