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velikii [3]
3 years ago
14

Substance A has a higher heat capacity than does substance B, and substance B has a higher heat capacity than does substance C.

If you add the same amount of heat to all three, which order shows the proper temperature increase for the three substances?
A. Temperature of C will increase first, then B, then A.
B. Temperature of A will increase first, then B, then C.
C. Temperature of B will increase first, then C, then A.
Physics
1 answer:
svetlana [45]3 years ago
5 0

A < B < C


C will increase faster than B which is faster than A

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Electric charge is distributed over the disk x2 + y2 ≤ 4 so that the charge density at (x, y) is rho(x, y) = 4x + 4y + 4x2 + 4y2
maw [93]

Answer:

Q=185.84C

Explanation:

We have to take into account the integral

Q=\int \rho dV

In this case we have a superficial density in coordinate system.

Hence, we have for R: x2 + y2 ≤ 4

Q=\int_{-2}^2\int_{-\sqrt{4-x^2}}^{\sqrt{4-x^2}}\rho dydx

but, for symmetry:

Q=4\int_0^2\int_0^{\sqrt{4-x^2}}\rho dydx\\\\Q=4\int_0^2\int_0^{\sqrt{4-x^2}}(4x+4y+4x^2+4y^2) dydx\\\\Q=4\int_0^{2}[4x\sqrt{4-x^2}+2(4-x^2)+4x^2\sqrt{4-x^2}+\frac{4}{3}(4-x^2)^{3/2}]dx\\\\Q=4[46.46]=185.84C

HOPE THIS HELPS!!

8 0
3 years ago
A 2500 kg elevator is suspended by a single cable, in which the tension is 30,000 N
Zanzabum

With mass 2500 kg, the elevator has weight

(2500 kg) <em>g</em> = (2500 kg) (9.80 m/s²) = 24,500 N

The net force on the elevator is 30,000 N - 24,500 N = 5500 N (because its weight pulls it downward, while the tension pulls upward).

The acceleration <em>a</em> of the elevator is obtained from Newton's second law,

(2500 kg) <em>a</em> = 5500 N

<em>a</em> = (5500 N) / (2500 kg)

<em>a</em> = 2.2 m/s²

6 0
3 years ago
A truck covers 40.0 m in 7.45 s while uniformly slowing down to a final velocity of 3.50 m/s.
astra-53 [7]

Answer:

(A) Original velocity will be 7.244 m /sec

(B) Acceleration will be  -0.5026m/sec^2

Explanation:

We have given distance covers by truck s = 40 m

Time taken by truck to cover this distance t = 7.45 sec

Final velocity v = 3.50 sec

According to second equation of motion

S=ut+\frac{1}{2}at^2

40=u\times 7.45+\frac{1}{2}\times a\times 7.45^2

7.45u+27.751a=40-----eqn 1

According to first equation of motion

v = u + at

So 3.5=u+7.45a-----eqn2

Solving equation 1 and 2

a = -0.5026m/sec^2

And u = 7.244 m /sec

(A) Original velocity will be 7.244 m /sec

(B) Acceleration will be

-0.5026m/sec^2

6 0
4 years ago
. Which of the following is not an ultimate goal of science?
Luba_88 [7]
What is not the ultimate goal of science is to produce unchanging and absolute answers - D. Scientists would like to, however, understand patterns, give explanations for natural events, and even make predictions. And it isn't really the case that they would like to produce unchanging answers.
7 0
3 years ago
a brick is suspended above the ground at a height of 6.6 meters. it has a mass of 5.3 kg. what is the potential energy of the br
Maslowich
The formula for potential energy is mass x height x gravitational force. Your mass is 5.3 kg and your height is 6.6 meters. The gravitational force on earth is 9.8 m/s. That means your answer is 5.3 x 6.6 x 9.8 and that equals 342.804
4 0
3 years ago
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