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3 years ago

How much current flows through a 12-ohm flashlight bulb operating at 3.0 volts?

1 answer:

6 0

From the ohms law, the current through a conductor is directly proportional to the potential difference. Thus we get the equation I = V/R
where I is the current in Ampheres, V is the voltage in volts and R is the resistance in Ohms.
Hence; I = 3/12
= 0.25 Ampheres
Thus, the current through the flashlight is 0.25 Ampheres

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. An object has a position given by ~r(t) = [3.0 m − (4.00 m/s)t]ˆı + [6.0 m − (8.00 m/s2 )t 2 ]ˆ , where all quantities are in

kupik [55]

Answer:

Explanation:

The position is $r(t) = [3.0 \text{ m} - (4.00 \text{ m/s})t]\hat{i} + [6.0 \text{m} - (8.00 \text{ m/s}^2 )t^2 ]\hat{j}$ .

The velocity is the first time-derivative of r(t).

$v(t) = \dfrac{d}{dt}r(t) = -4.00\,\hat{i} -16t\,\hat{j}$

The acceleration is the first time-derivative of the velocity.

$a(t) = \dfrac{d}{dt} v(t) = -16\hat{j}$

Since a(t) does not have the variable t, it is constant. Hence, at any time,

$a = -16\hat{j}$

Its magnitude is 16 m/s².

4 0

3 years ago

PLEASE ANSWER ALL THE QUESTIONS WILL MARK AS BRAINLIEST 20 POINTS

iogann1982 [59]

8:B) Again, sound travels faster in solids
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10:D) The speed of light never changes the only thing that makes light change is when it travels through objects of different densities.

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3 years ago

identify the action reaction forces in each picture the first picture is done for you write your answer on a separate sheet of p

xxMikexx [17]

Newton's Third Law of Motion states that for every action there must exist an equal but opposite reaction.

This ultimately implies that, Newton's Third Law of Motion is a law based on action-reaction force pairs.

In this exercise, you're required to identify the action-reaction forces in the attached picture.

Under condition A, a boy is leaning against a wall;

The force being exerted by the boy on the wall is a force of action.

The force being exerted by the wall on the boy is a force of reaction.

Under condition B, a boy is jumping off a diving board.

The force being exerted by the feet of the boy on the diving board is a force of action.

The force being exerted by the diving board on the feet of the boy is a force of reaction.

Under condition C, a nail is being hammered into the wall.

The force being exerted by the hammer on the nail is a force of action.

The force being exerted by the nail on the hammer is a force of reaction.

Under condition D, a man is walking on a ground (floor).

The force being exerted by the foot of the man on the ground (floor) is a force of action.

The force being exerted by the ground (floor) on the foot of the man is a force of reaction.

Under condition E, a boy is holding a ball;

The force being exerted by the hand of the boy on the ball is a force of action.

The force being exerted by the ball on the hand of the boy is a force of reaction.

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3 years ago

An aeroplane flies at a constant speed of 250 m/s

Allushta [10]

Answer:

250+50=300ms-¹

I would appreciate if my answer is chosen as a brainliest answer

8 0

3 years ago

Help please! Test tomorrow!

dlinn [17]

Earth distance to the Sun is about 40 times the Moon's distance from earth.

Explanation:

The Earth's distance from the Sun is about 93 million miles. When it expressed in Km, it is 150 million Km.
The Moon's distance from Earth is 238,855 miles. When it is 40 times then it will approximately equal to 93 million miles.
The Sun's distance from Venus is 67.237 million miles. The Sun's distance from mercury is 35.832 million miles.

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4 years ago