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Bess [88]
4 years ago
11

Charging a balloon by rubbing it on wool is an example of

Physics
2 answers:
dimaraw [331]4 years ago
4 0
I believe static eletricity
SVETLANKA909090 [29]4 years ago
3 0
Electronic friction ^.^
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Why do you see objects when you shine a flashlight in a dark room?​
Afina-wow [57]

Answer:

We see objects in a dark room due to the emission of light photons which are sensitive to our eyes. Darkness is simply a terminology used to describe the absence of light. Visible light to human is a component of the electromagnetic spectrum. Our eyes have receptors that picks the photons which light releases

Explanation:

3 0
3 years ago
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a 20 kg projectile is launched from a cannon. a. if the projectile leaves the cannon with a velocity of 54 m/s, what is the work
Artyom0805 [142]

Answer:

KE = 1/2 M v^2       kinetic energy of projectile

KE = 1/2 * 20 * (54 m/s)^2 = work done on projectile

W = 10 * 54^2 = work done on projectile

W = 29,160 J

7 0
2 years ago
A speeding motorist traveling 120 km/h passes a stationary police officer. The officer immediately begins pursuit at a constant
Lelu [443]
120 km/h = 33.33 m/s   10.8 km/h/s = 3 m/s/s     the motorist will cover a distance of 33.33 m x T(seconds)   the police officer will cover a distance of 1/2 (3) T^2   they will be at the same point when   33.33T = 1.5 T^2   33.33 = 1.5 T   3T = 66.66   T = 22.22 seconds   it will take the officer 22.22 seconds to catch the motorist.     the officer will be moving V=AT = 3m/s x 22.22 seconds = 66.66 m/s   almost 240 km/h (239.976 km/h)
8 0
4 years ago
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(PLEASE HELP) Which of the following is the name for two or more types of atoms that are chemically bonded together?
lions [1.4K]

Answer: A

Explanation:

6 0
3 years ago
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A ball is thrown down vertically with an initial speed of 31 ft/s from a height of 40 ft. (a) What is its speed just before it s
ICE Princess25 [194]

Answer:

a. 41.96ft/s

b. 1.096s

Explanation:

a. v²=u²+2gs

v²=31²+2×10×40

V=41.96ft/s

b. t=(v-u) /g

t=(41.96-31)/10

t=1.096s

5 0
3 years ago
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