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Basile [38]
4 years ago
9

the structure shown in the picture is made of copper. The three thin rods are of equal dimensions. The single main rod is heated

to 400 °C and then is brought into contact with the rods P, Q, and R. After several minutes, the temperatures of rods P, Q, and R are recorded. Which option gives the correct values of the final temperatures of rods P, Q, and R? A) P = R < Q B) P = Q = R C) P = R > Q D) P = Q < R
Physics
2 answers:
charle [14.2K]4 years ago
4 0

If you are on USA Test prep the answer is B

julia-pushkina [17]4 years ago
3 0

The answer is B) P = Q = R

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Answer:

Explanation:

reading of scale = reaction force of surface R

centripetal force = R - mg = m v² / R , m is mass , v is velocity and R is radius of the circular path .

R = mg + m v² / R

given ,

m v² / R = .80 mg

v² = .80 x g x R

= .8 x 9.8 x 9 = 70.56

v = 8.4 m /s

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3 years ago
1.a car sitting at rest on the road <br>balanced or unbalanced<br>explain your answer​
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Answer:

Balanced force

Explanation:

Balanced Forces, When forces are in balance, acceleration is zero. Velocity is constant and there is no net or unbalanced force. ... Although friction is acting on the person, there is no change in velocity and friction is not a net force in this case. Friction is only a net force if it changes the velocity of a mass.

7 0
4 years ago
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The ocean's level is currently rising at about
chubhunter [2.5K]

Answer:

The sea level will be 5m higher in 1667 y (years)

Explanation:

From the question, the rate at which the ocean's level is currently rising is about 3mm per year.

First, we will convert mm (millimeter) to m (meter)

1 mm = 0.001 m

Then,

3 mm = 3 × 0.001 m

= 0.003m

That is, the rate at which the ocean's level is currently rising is about 0.003m per year.

Now, to determine how long it will take for the ocean's level be 5 m higher than now at the given rate,

If the ocean rises 0.003 m in 1 year, then

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x = (5 m × 1 year) / 0.003 m

x = 5 / 0.003

x = 1666.67 years

x ≅ 1667 years

Hence, the sea level will be 5m higher in 1667 y (years)

8 0
4 years ago
In this circuit, which bulb, when burned out, will cause all other bulbs to stop glowing?
Alinara [238K]

Answer:

I think it's B

Explanation:

sorry if I got it wrong TvT

6 0
3 years ago
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In 1985, there were 285 cell phone subscribers in the small town of Glenwood. The number of subscribers increased by 75% per yea
Amiraneli [1.4K]

Answer:

b. (4677)

Explanation:

You can apply the same equation we use to calculate the compound interest but with phones.

Look:

M = C.(1+i)^n

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i = how much this number gets bigger (75%)

n = the number of periods (5 years)

So...

M = 285 . (1 + 0,75)^5

M = 285 . 1,75^5

M = 285 . 16.4

M = 4677

4 0
3 years ago
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