3 years ago

Speed is a scalar quantity that describes only the

Physics

1 answer:

Anna [14]3 years ago

4 0

Answer:

magnitude of the velocity

Explanation:

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Canyon walls are eroded at a rate of approximately:

AnnyKZ [126]

B. Half a centimeter per year

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6 0

3 years ago

Two carts on an air track have the same mass and speed and are traveling toward each other. If they collide and stick together,

lora16 [44]

Answer:

$p = 0$ , $K_{A} = m\cdot v^{2}$ (before collision), $K_{B} = 0$ (after collision).

Explanation:

The total momentum is obtained using the Principle of Momentum Conservation:

$m\cdot v_{A} - m \cdot v_{A} = 2\cdot v_{B}$

It is trivial to find that final speed and total momentum of the system are zero:

$p = 0$

The total kinetic energy of the system becomes zero due to the inellastic collision and the same masses and speeds. Total kinetic energies before and after collision are, respectively:

$K_{A} = m\cdot v^{2}$

$K_{B} = 0$

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3 years ago

On a beautiful night in Washington D.C., you see a mirror image of the Washington Monument and surrounding scenery. What causes

Alchen [17]

Your answer would be B, Reflected light! hope this helps

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4 years ago

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Is flammability a physical property or chemical property

krok68 [10]

Answer:

Chemical property

Explanation:

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6 0

3 years ago

Assume that you need to transfer 4628320 J of energy in ten minutes between the two reservoirs. To enhance the rate of energy tr

iren [92.7K]

Answer:

$A = \frac{179.4}{\frac{dT}{dx}}$

Explanation:

As we know that thermal conduction of heat is given by the formula

$\frac{dQ}{dt} = \frac{kA}{L}(T_2 - T_1)$

now we have

$\frac{dQ}{dt} = \frac{4628320}{10(60)}$

$\frac{dQ}{dt} = 7713.87 Watt$

now we also know that

k = 43 W/m-k

now we have

$7713.87 = \frac{(43)A}{dT}{dx}$

so we have

$A = \frac{179.4}{\frac{dT}{dx}}$

here we know that dT/dx is temperature gradient of the rod which is ratio of temperature difference of two ends of the rod and length of the rod.

7 0

4 years ago