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Snezhnost [94]
3 years ago
6

A 115 kg hockey player, Adam, is skating east whenever he tackles a 133 kg player, Bob, skating west at -1.59 m/s. Afterwards, t

hey move together at .250 m/s east. What was Adam's velocity before the collision? (Unit = m/s)
Physics
1 answer:
Ksju [112]3 years ago
4 0

Answer:

2.38 m/s

Explanation:

Momentum is conserved:

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

After the collision, they move at the same speed, so v₁ = v₂ = v.

m₁u₁ + m₂u₂ = (m₁ + m₂) v

Plugging in numbers:

(115 kg) u₁ + (133 kg) (-1.59 m/s) = (115 kg + 133 kg) (0.250 m/s)

u₁ = 2.38 m/s

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If the detector readings are proportional to the amplitude of the microwave E field, the data from the first polarization experi
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Answer:

Fields and variables are proportional

Explanation:

To solve the problem we must first identify the Vector Intensity,

The intensity is given by:

I = I_ {0} cos^2 (\theta)

We also know that the change given by the Intensity is always the square of the amplitude,

This is,

I = A ^ 2

The intensity is <em>proportional</em> to the change exerted on cos ^ 2 (\theta)

That is to say that in turn the amplitus is <em>proportional</em> to the Intensity.

On the other hand, relating the two variables we have

A ^ 2 = A ^ 2_ {0} cos ^ 2 \theta

A = A_ {0} cos \theta

In this way we can conclude that the electric field of intensity is also <em>proportional</em> to cos ^ 2 \theta

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3 years ago
what kind of wave would be observed in outer space between planets where there is very little matter?
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Shock waves can be observed in outer space between planets where there is very little matter. Although little, plasma does exist in outer space which allows the waves to travel.
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3 years ago
Which phrases apply to the formation of the Grand Canyon?
Damm [24]

Answer:

Large scale

Explanation:

short term

6 0
3 years ago
A stretched string has a mass per unit length of 5.12 g/cm and a tension of 19.3 N. A sinusoidal wave on this string has an ampl
Sati [7]

Answer:

a. 0.143 mm b. 77.6 rad/m c. 483.18 rad/s  d. +1

Explanation:

a. ym

Since the amplitude is 0.143 mm, ym = amplitude = 0.143 mm

b. k

We know k = wave number = 2π/λ where λ = wavelength.

Also, λ = v/f where v = speed of wave in string = √(T/μ) where T = tension in string = 19.3 N and μ = mass per unit length = 5.12 g/cm = 5.12 ÷ 1000 kg/(1 ÷ 100 m) = 0.512 kg/m and f = frequency = 76.9 Hz.

So, λ = v/f = √(T/μ)/f

substituting the values of the variables into the equation, we have

λ = √(T/μ)/f

= √(19.6 N/0.512 kg/m)/76.9 Hz

= √(38.28 Nkg/m)/76.9 Hz

= 6.187 m/s ÷ 76.9 Hz

= 0.081 m

= 81 mm

So, k = 2π/λ

= 2π/0.081 m

= 77.6 rad/m

c. ω

ω = angular frequency = 2πf where f = frequency of wave = 76.9 Hz

So, ω = 2πf

= 2π × 76.9 Hz

= 483.18 rad/s

d. The correct choice of sign in front of ω?

Since the wave is travelling in the negative x - direction, the sign in front of ω is positive. That is +1.

4 0
3 years ago
Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problem
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One example is that when their food catches fire in a cooking pot or pan, it is advisable to smother the fire by covering the fire with a blanket rather than douse the fire with water. DOeing the later will only aggravate the fire. Knowledge of basic science dictates that oil and water are immiscible liquids the oil will continue to burn even as the water is poured into the oil. More so, as the water violently evaporates due to the heat, it spreads the burning oil and hence spreads the fire.

7 0
3 years ago
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