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3 years ago

Describe two examples of activities that you do where you depend on friction, and would not be able to do them without friction.

Physics

1 answer:

kaheart [24]3 years ago

7 0

Answer: One is when a bike stops. The other is when you rub your hands together to get warm.

Explanation: Force and friction affect our daily lives in numerous amounts of ways. For instance, when a football is kicked, it moves faster later after some time its force decreases due to friction. A common example of friciton is when a bike stops. When the brakes are applied the friction on the pads cause the bike to stop. The other is because you are getting warm with friction.

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True or false elliptical galaxies are made up of old stars containing small amount of gas

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True, They contain old stars and posses little gas or dust

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3 years ago

Discuss the correlation or connection between stars with a higher mass and the amount of fuel they have to work with

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3 years ago

What is the current in a 160V circuit if the resistance is 2Ω? V= I= R=

Alex787 [66]

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v = IR

v= 160 R = 2

160 = 2I

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2 years ago

Do tides depend more on the strength of gravitational pull or on the difference in strengths? explain.

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3 years ago

Assuming typical speeds of 8.5 km/s and 5.5 km/s for P and S waves, respectively, how far away did the earthquake occur if a par

taurus [48]

Answer:

The earthquake occurred at a distance of 1122 km

Explanation:

Given;

speed of the P wave, v₁ = 8.5 km/s

speed of the S wave, v₂ = 5.5 km/s

The distance traveled by both waves is the same and it is given as;

Δx = v₁t₁ = v₂t₂

let the time taken by the wave with greater speed = t₁

then, the time taken by the wave with smaller speed, t₂ = t₁ + 1.2 min, since it is slower.

v₁t₁ = v₂t₂

v₁t₁ = v₂(t₁ + 1.2 min)

v₁t₁ = v₂(t₁ + 72 s)

v₁t₁ = v₂t₁ + 72v₂

v₁t₁ - v₂t₁ = 72v₂

t₁(v₁ - v₂) = 72v₂

$t_1 = \frac{72v_2}{v_1-v_2}\\\\t_1 = \frac{72*5.5}{8.5-5.5}\\\\t_1 = 132 \ s$

The distance traveled is given by;

Δx = v₁t₁

Δx = (8.5)(132)

Δx = 1122 km

Therefore, the earthquake occurred at a distance of 1122 km

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3 years ago