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Katyanochek1 [597]
3 years ago
14

What type of surface is a poor reflector but a good absorber of radiation

Physics
1 answer:
koban [17]3 years ago
3 0
Black surface is the best absorber of radiations but a poor reflector.
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Please help !!!! I’m taking a quiz
icang [17]

Answer: 512 and 16

Explanation:

7 0
2 years ago
An ammeter with a resistance of 5.0 ohm is connected in series with a 3.0V cell and a lamp rated at 300 mA, 3V. Calculate the cu
Alex

Answer:

I = 0.2 A

Explanation:

Lamp is rated at 300 mA

I_lamp = 0.3 A

Voltage is; V = 3V

Thus; Resistance is given by;

R = V/I

R = 3/0.3

R = 10 ohms

Now, since the ammeter of 5 ohms is connected in series with the lamp. Thus equivalent resistance;

R_eq = 10 + 5

R_eq = 15 ohms

Ammeter current will be;

I = V/R_eq

I = 3/15

I = 0.2 A

3 0
2 years ago
Need help girliess.
steposvetlana [31]
If I remember correctly, it is the 3rd answer choice.
8 0
3 years ago
Can a material have negative permittivity?
sleet_krkn [62]
No it can't it's material
3 0
3 years ago
In a lab, the mass of object A is 2.5 kg. Object A weighs:
dangina [55]

Answer:

25N

Explanation:

Assuming the lab is on earth:

w = mg = 2.5 (9.81) = 25N

8 0
3 years ago
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