The theoretical line perpindicular to the surface where a light ray hits a mirror is called the
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That's called the "normal" to the surface at that point.
A planet has a mass of 5.68 x 1026 kg and a radius of 6.03 x 107 m. What is the weight of a 65.0 kg person on the surface of this planet?
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Weight is dependent on both the mass of the object and the gravitational pull of a planet. This is why people weigh differently on other planets, which have a different gravitational force. Using the formula W = G(m1)(m2)/r^2 where:
W = weight or force G = Gravitational constant (not the same as g) = 6.67x10^-11 m^2/kg^2 m1 = mass of object 1 (person) m2 = mass of object 2 (planet) r = radius of planet
This gives a weight of 677.26 Newtons
Advantages of using low energy appliances
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Using low energy appliances can save you a lot of money. The more energy you use the more expensive it can get. Also it is better for the environment if you use the least energy possible. We don't want to be wasting so use less energy. More energy used, more harm it can do on the environment.
What is true about discipline
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discipline will inprove your profoments - mithbustersÂ
A 4 watt night light is left on for 8 hours each night how much work does it do per night
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1 watt = 1 joule per second
(4 joules/second) x (3600 second/hour) x (8 hour)
= (4 x 3600 x 8) (joule)
= 115,200 joules .
Air has weight. a. True b. False
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Air is a combination of gases, gases do have a mass/weight.