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butalik [34]
3 years ago
8

How much current is in a circuit that includes a 9-volt battery with a resistance of 3

Physics
1 answer:
Darya [45]3 years ago
7 0
Just remember
Voltage = current times resistance

current = voltage over resistance

Current = 9/3 = 3
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A 12-kg projectile is launched with an initial vertical speed of 20 m/s. It rises to a maximum height of 18 m above the launch p
kirill115 [55]

Answer:

Change in mechanical energy, \Delta E=283.2\ J

Explanation:

It is given that,

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Speed of the projectile, v = 20 m/s

Maximum height, h = 18 m

Initially, the projectile have only kinetic energy. it is given by :

K=\dfrac{1}{2}mv^2

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P =2116.8 J

The change in mechanical energy is given by :

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So, the change in mechanical energy is 283.2 J. Hence, this is the required solution.

8 0
3 years ago
Question 7 of 10
jok3333 [9.3K]

Answer:

when a magnet is hanged freely in air it turns in the direction of the north and south while the magnetic north pole faces the south pole of the earth and magnetic south pole faces the north pole if the earth

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The battery for a certain cell phone is rated at 3.70 V. According to the manufacturer it can produce math]3.15 \times 10^{4} J[
AysviL [449]

Answer:

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Therefore, the average current that this cell phone draws when turned on is 0.451 A.

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