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3 years ago

8

Diffuse reflection occurs when the size of surface irregularities is

1 answer:

erik [133]3 years ago

7 0

Answer:

Varies from point to point on the surface of the material.

Explanation:

Diffusion reflection is the reflection of light due to irregular reflection angles on the material surface. It might be as a result of microscopic irregularities on the material surface or just plain non reflecting ability of the material.

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An object traveling at a 5.0 m/s East has a mass of 4.0 kg. What is the magnitude of the object’s momentum?

DaniilM [7]

Answer:

20 kgm/s

Explanation:

Momentum=mass * velocity

Momentum=4 *5= 20kgm/s

6 0

4 years ago

A person shuffles across the rug and then place his finger near his friend's nose, causing a small spark that transfers about 10

sineoko [7]

Answer:

$n = \frac{10^{-9}C}{1.6 x10^{-19}C}= 6.25 x10^{9} electrons \approx 6.3 x10^{9} electrons$

Explanation:

For this case we know that the charge associated to the transferred electrons of the small spark is $10^{-19}C$ and we want to find the number of electrons transferred.

From the properties of matter we know that the charge of the electron is

$q_e = |-1.6 x10^{-19}C |= 1.6 x10^{-19}C$

And we know that the total charge is given by this expression:

$Q = n e$

Where Q represent the charge, n the number of electrons and e the charge of the electron.

If we solve for n we got:

$n = \frac{Q}{e}$

And replacing we got:

$n = \frac{10^{-9}C}{1.6 x10^{-19}C}= 6.25 x10^{9} electrons \approx 6.3 x10^{9} electrons$

6 0

3 years ago

20. Consider two Stars A and B with temperatures Ta and TB and radii Ra and RB respectively. If TA

Rus_ich [418]

Answer:

$L_A = 9 L_B$

Explanation:

The formula that relates the luminosity of a star (L) to its radius (R) and the temperature (T) is

$L=\frac{R^2}{T^4}$

For star B, we can write:

$L_B=\frac{R_B^2}{T_B^4}$

For star A, we have

$T_A = 2 T_B\\R_A = 12 R_B$

So the luminosity of star A is

$L_A=\frac{R_A^2}{T_A^4}=\frac{(12 R_B)^2}{(2 T_B)^4}=\frac{144 R_B^2}{16 T_B^4}=9\frac{R_B^2}{T_B^4}=9 L_B$

4 0

3 years ago

What is gravity???☺️<br>

AfilCa [17]

Answer:

Gravity

Explanation:

its an invisible force that pulls objects

toward each other.

hope it helps

3 0

3 years ago

Read 2 more answers

Which is the correct relationship among pressure, flow, and resistance?

kondaur [170]

Answer:

Flow is proportional to change in pressure and inversely proportional to resistance.

8 0

2 years ago