3 years ago

When someone pushes a large rock down a hill what energy change occurs?

Physics

1 answer:

ss7ja [257]3 years ago

7 0

Answer:

Explanation:

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What is one key difference between the

Arada [10]

Radiation do not require material medium to travel while convection requires material medium for travelling.

The main difference between radiation and another method for heat transfer is that radiation don't require medium for its transfer.

So, the key difference between radiation and convection is radiation do not require medium for its transaction.

7 0

4 years ago

The average distance between collisions for atoms in a real gas is known as the mean free path (see pp. 298-9 in McKay). Which o

dusya [7]

Answer:

300 nm

Explanation:

R = Gas constant = 8.314 J/molK

r = Atomic radii = $1\times 10^{-10}\ m$

d = Atomic diameter = $2r=2\times 10^{-10}\ m$

At STP

T = Temperature = 273.15 K

P = Pressure = 100 kPa

$N_A$ = Avogadro's number = $6.022\times 10^{23}$

The mean free path is given by

$\lambda=\frac{RT}{\sqrt2d^2N_AP}\\\Rightarrow \lambda=\frac{8.314\times 273.15}{\sqrt2 \pi \times (2\times 10^{-10})^2\times 6.022\times 10^{23}\times 100000}\\\Rightarrow \lambda=2.12165\times 10^{-7}\ m=212.165\times 10^{-9}\ m=212.165\ nm$

The answer that best represents the mean free path for gas molecules is 300 nm

4 0

3 years ago

A cyclist rode at an average speed of 10 mph for 15 miles. how long what the ride?

nekit [7.7K]

15 miles * 1 hour = 15 mph
15 mph / 10 miles = 1.5 hours

5 0

3 years ago

uppose one gallon of gasoline produces 1.17×108 J of energy, and this energy is sufficient to operate a car for 18.3 miles. An a

EleoNora [17]

Answer:

4.5 x 10^6 miles

Calculations can be viewed on the snapshot attached to this reply.

Thanks

8 0

4 years ago

The unit of energy is a derived unit give reasons.<br>

liraira [26]

Answer:

ioinl

Explanation:

6 0

2 years ago