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vfiekz [6]
3 years ago
12

The​​ specific ​​heat​​ of​​ solid​​ Substance​​ A​​ is​​ 0.1​​kJ/kg​​ K.​​The specific ​​heat​​ of​​ solid​​ Substance ​​B​​ is

1.0​ ​kJ/kg​ ​K.​ ​Which​ ​substance​ ​will​ ​require​ ​a​ ​higher​ ​number​ ​of​ ​joules​ ​to​ ​heat​ ​from​ ​10°C​ ​to 20°C?
Physics
1 answer:
kykrilka [37]3 years ago
7 0

Answer: substance B

Explanation: because it is a higher variable on the right so the left must be higher energy

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A coil formed by wrapping 65 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the
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Answer:

377 m

Explanation:

number of turns, N = 65

θ = 36°

B1 = 200 micro Tesla

B2 = 600 micro tesla

t = 0.4 s

induced emf, e = 80 mV

Let a be the side of the square coil.

e=\frac{d\phi }{dt}=NA\frac{dB}{dt}\times Sinθ

0.080=\frac{65\times a^{2}\times Sin36\times\left ( 600 - 200 \right )\times 10^{-6}}{0.4}

0.080=0.038a^{2}

a = 1.45 m

Total length of the wire, L = N x 4a = 65 x 4 x 1.45 = 377 m

Thus, the length of the wire is 377 m.

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The period of a simple pendulum in a grandfather clock on another planet is 1.80 s. What is the acceleration due to gravity (in
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Answer:

12.17 m/s²

Explanation:

The formula of period of a simple pendulum is given as,

T = 2π√(L/g)........................ Equation 1

Where T = period of the simple pendulum, L = length of the simple pendulum, g = acceleration due to gravity of the planet. π = pie

making g the subject of the equation,

g = 4π²L/T²................... Equation 2

Given: T = 1.8 s, l = 1.00 m

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Substitute into equation 2

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During a race, a sprinter accelerated 1.8 m/s 2 in 2.5 seconds. The sprint increase with this amount of acceleration by 4.5 m/s.

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Acceleration is the time rate of change of velocity.

Acceleration a = velocity v / time t

1.8 = v/2.5

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The sprint increase with this amount of acceleration by 4.5 m/s.

Learn more about acceleration.

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