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nikdorinn [45]
4 years ago
5

What is the volume V of a sample of 2.30 mol of copper? The atomic mass of copper (Cu) is 63.5 g/mol, and the density of copper

is 8.92×103kg/m3.
Physics
1 answer:
djyliett [7]4 years ago
5 0

Answer:

1.636 x 10^-5 m^3

Explanation:

As we know that

1 mol of copper = 63.5 g of copper

2.3 mol of copper = 63.5 x 2.3 = 146.05 g of copper = 0.146 kg of copper

Density of copper = 8.92 x 10^3 kg/m^3

The relation between mass and volume is given by

mass = volume x density

Volume = \frac{mass}{density}

Volume = \frac{0.146}{8.92\times10^3}=1.636\times10^{-5}m^3

Thus, the volume of copper is 1.636 x 10^-5 m^3.

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A crane lifts a 1,750 kg mass using a steel cable whose mass per unit length is 0.88 kg/m. What is the speed of transverse waves
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Answer:

139.6m/s

Explanation:

Calculate the tension first, T=m*g

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Then calculate the wave speed using the equation v = √ (T/μ)

v= √(17150N)/(0.88kg/m)

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3 years ago
An RV is traveling 60 km/h along a highway. A boy sitting near the driver of the RV throws a ball to another boy at the back end
alina1380 [7]

Answer:

Speed of the ball relative to the boys: 25 km/h

Speed of the ball relative to a stationary observer: 35 km/h

Explanation:

The RV is travelling at a velocity of

v_{RV}=+60 km/h

Here we have taken the direction of motion of the RV as positive direction.

The boy sitting near the driver throws the ball back with speed of 25 km/h, so the velocity of the ball in the reference frame of the RV is

v_B = -25 km/h

with negative sign since it is travelling in the opposite direction relative to the RV. Therefore, this is the velocity measured by every observer in the reference frame of the RV: so the speed measured by the boys is

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Instead, a stationary observer outside the RV measures a velocity of the ball given by the algebraic sum of the two velocities:

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3 years ago
What will change the velocity of a periodic wave?
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Changing the medium of the wave.

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3 years ago
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A steel rod with a length of l = 1.55 m and a cross section of A = 4.89 cm2 is held fixed at the end points of the rod. What is
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The size of the force developing inside the steel rod is 32039.28 N

Explanation:

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cross sectional area of the steel, A = 4.89 cm²

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