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Juliette [100K]
2 years ago
12

A milliliter of very hot water is added to a liter of very cold water. Which of these events will occur? Assume the surrounding

air is at room temperature.
a. The cold water will warm to room temperature.
b. The hot water will cool down.
c. The cold water will warm up.
d. The cold water will warm up, but will never reach room temperature.
Physics
2 answers:
Nadya [2.5K]2 years ago
7 0
Answer shall be B.the hot water will cool down.
prisoha [69]2 years ago
5 0

Answer:b

Explanation:the water will not be hot nomore because of the cold water

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The flagpole is held vertical by two ropes. The first of these ropes has a tension in it of 100 N and is at an angle of 60° to t
KatRina [158]

Answer:

T₂ = 123.9 N,  θ = 66.2º

Explanation:

To solve this exercise we use the law of equilibrium, since the diaphragm does not appear, let's use the adjoint to see the forces in the system.

The tension T1 = 100 N, we create a reference frame centered on the pole

X axis

       T₁ₓ - T_{2x} = 0

        T_{2x}= T₁ₓ

Y axis y

      T_{1y} + T_{2y} - 200N = 0

      T_{2y} = 200 -T_{1y}

let's use trigonometry to find the component of the stresses

         sin 60 = T_{1y} / T₁

         cos 60 = t₁ₓ / T₁

         T_{1y} = T₁ sin 60

         T1x = T₁ cos 60

         T_{1y}y = 100 sin 60 = 86.6 N

         T₁ₓ = 100 cos 60 = 50 N

for voltage 2 it is done in the same way

         T_{2y} = T₂ sin θ

         T₂ₓ = T₂ cos θ

we substitute

         

           T₂ sin θ= 200 - 86.6 = 113.4

           T₂ cos θ = 50              (1)

to solve the system we divide the two equations

           tan θ = 113.4 / 50

           θ = tan⁻¹ 2,268

           θ = 66.2º

we caption in equation 1

           T₂ cos 66.2 = 50

           T₂ = 50 / cos 66.2

           T₂ = 123.9 N

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3 years ago
"Calculate the speed of this sound wave by recording how much time it takes to travel 5 meters. Use the (old school) velocity eq
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1) sound velocity reported by you : 292.39 m /s

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