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azamat
3 years ago
12

What is cocanve mirror?​

Physics
2 answers:
pochemuha3 years ago
8 0

Answer:

A mirror that has a reflecting surface that is recessed inward is called concave mirror

professor190 [17]3 years ago
4 0

ehh ci menu jo kita ci answer

and oh dusra a ohh o's ne answer kita ci prr o's ton baad hor vi answer kite h.oe ne osne

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The instruments carried by a spacecraft are called the
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What is a lunar month
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It's the duration between successive new moons. Also called a lunation or synodic month, it has a mean period of 29.53059 days (29 days 12 hours and 44 minutes).

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Charge Q is distributed uniformly throughout the volume of an insulating sphere of radius R = 4.00 cm. At a distance of r = 8.00
Elena L [17]

Answer:

2.62898\times 10^{-6}\ C/m^3

1979.99974\ N/C

Explanation:

k = Coulomb constant = 8.99\times 10^{9}\ Nm^2/C^2

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r = Distance = 8 cm

R = Radius = 4 cm

Electric field is given by

E=\dfrac{kQ}{r^2}\\\Rightarrow Q=\dfrac{Er^2}{k}\\\Rightarrow E=\dfrac{990\times 0.08^2}{8.99\times 10^{9}}\\\Rightarrow Q=7.04783\times 10^{-10}\ C

Volume charge density is given by

\sigma=\dfrac{Q}{\dfrac{4}{3}\pi R^3}\\\Rightarrow \sigma=\dfrac{7.04783\times 10^{-10}}{\dfrac{4}{3}\pi (0.04)^3}\\\Rightarrow \sigma=2.62898\times 10^{-6}\ C/m^3

The volume charge density for the sphere is 2.62898\times 10^{-6}\ C/m^3

E=\dfrac{kQr}{R^3}\\\Rightarrow E=\dfrac{8.99\times 10^9\times 7.04783\times 10^{-10}\times 0.02}{0.04^3}\\\Rightarrow E=1979.99974\ N/C

The magnitude of the electric field is 1979.99974\ N/C

8 0
3 years ago
POSSIBLE POINTS: 1.92
gogolik [260]

Answer:

jnfal4u4ryhfsbjls5

Explanation:

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when astronauts work in space, they are sometimes attached to the spacecraft by a line called an umbilical. Why do you think the
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3 years ago
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