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Serhud [2]
2 years ago
7

what is usually caused when dissimilar materials are rubbed together transferring electrons from one to another

Physics
1 answer:
Volgvan2 years ago
6 0

Answer:

static electricity

Explanation:

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Question 4 of 10
kiruha [24]
B hey what do u know i took that test to
5 0
2 years ago
What force is used to make the back-and-forth motion of a swing higher?
Eddi Din [679]

Answer:

its a

Explanation:

scrape - push or pull a hard or sharp implement across (a surface or object) so as to remove dirt or other matter.

5 0
2 years ago
Read 2 more answers
A massive tractor rolls down a country road. in a perfectly inelastic collision, a small sports car runs into the machine from b
Helga [31]
The answer for this change in the magnitude of momentum is the same for both because momentum is always conserved so both vehicles have the identical change. 
So for determining who has the greater change in kinetic energy, momentum (P) = mv so P^2 = m^2 v^2 P^2 / 2m = 1/2 m v^2 = energy So the weightier the mass the smaller the energy change for the same momentum change so in here, the car has a greater change in kinetic energy.
5 0
3 years ago
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A 1.4 kg block slides across a rough surface such that it slows down with an acceleration of 1.25 m/s(squared). What is the coef
tino4ka555 [31]
F = ma 

<span>where </span>

<span>F = frictional force </span>
<span>m = mass of the block = 1.4 kg (given) </span>
<span>a = acceleration of the block = 1.25 m/sec^2 (given) </span>

<span>Substituting values, </span>

<span>F = (1.4)(1.25) </span>

<span>F = 1.75 N </span>

<span>By definition, </span>

<span>F = (mu)(Normal force) </span>

<span>where </span>

<span>mu = coefficient of friction </span>
<span>Normal force = mg = 1.4*9.8 = 13.72 </span>

<span>Again, substituting appropriate values, </span>

<span>1.75 = mu(13.72) </span>

<span>mu = 0.128</span>
5 0
2 years ago
Light in a vacuum travels at a constant speed of 3x10^8 m/s. If the moons average distance from the earth is 38776106 km how lon
Karo-lina-s [1.5K]

Answer: 258.3 s

Explanation:

The speed s is given by the following equation:

s=\frac{D}{t}

Where:

s=3(10)^{8} m/s is the speed of light in vacuum

D=2(38776106 km \frac{1000 m}{1 km})=7.75(10)^{10} m is the double of the distance between Earth and Moon, since the beam of light travels from Earth to the Moon and back to Earth again.

t is the time it takes to the beam of light to travel the mentioned distance

Isolating t and solving with the given information:

t=\frac{D}{s}

t=\frac{7.75(10)^{10} m}{3(10)^{8} m/s}

Finally:

t=258.3 s \approx 258 s

5 0
3 years ago
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