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3 years ago

PLEASE HELP ME WITH THIS ONE QUESTION

Physics

1 answer:

Oliga [24]3 years ago

5 0

OPTION D is the correct answer.

Refer to the attachment for complete calculation...

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You are testing a vehicle fuel gauge float. The float pulls 40mA when the tank is 100% full and 2mA when the tank is empty. Assu

Ad libitum [116K]

Answer:

I=20.6mA

Explanation:

the relation between the current and the tank percentage is linear:

$\frac{40mA-2mA}{100-0} = \frac{I-2mA}{49-0}$

then:

I=49*38/100+2=20.6mA

3 0

3 years ago

PHYSICS 50 POINTS PLEASE HELP

babymother [125]

Newton’s First Law of Motion - if an object is at rest, it takes un-

balanced forces to make it move. Conversely, if an object is moving

it takes an unbalanced force to make it change it’s direction or speed.

Newton was the first to see that such apparently diverse phenomena as a satellite moving near the Earth's surface and the planets orbiting the Sun operate by the same principle: Force equals mass multiplied by acceleration, or F=ma.

7 0

3 years ago

Read 2 more answers

Can someone tell me what my displacement is?

natulia [17]

60017 is or answer ok you got it

3 0

3 years ago

A block is at rest on a plank whose angle can be varied. The angle is gradually increased from 0 deg. At 31.8°, the block starts

galina1969 [7]

Answer:

$\mu_s = 0.62$

$\mu_k = 0.415$

The motion of the block is downwards with acceleration 1.7 m/s^2.

Explanation:

First, we will calculate the acceleration using the kinematics equations. We will denote the direction along the incline as x-direction.

$x - x_0 = v_0t + \frac{1}{2}at^2\\3.4 = 0 + \frac{1}{2}a(2)^2\\a = 1.7~m/s^2$

Newton’s Second Law can be used to find the net force applied on the block in the -x-direction.

$F = ma\\F = 1.7m$

Now, let’s investigate the free-body diagram of the block.

Along the x-direction, there are two forces: The x-component of the block’s weight and the kinetic friction force. Therefore,

$F = mg\sin(\theta) - \mu_k mg\cos(\theta)\\1.7m = mg\sin(31.8) - \mu_k mg\cos(31.8)\\1.7 = (9.8)\sin(\theta) - mu_k(9.8)\cos(\theta)\\mu_k = 0.415$

As for the static friction, we will consider the angle 31.8, but just before the block starts the move.

$mg\sin(31.8) = \mu_s mg\cos(31.8)\\\mu_s = tan(31.8) = 0.62$

5 0

3 years ago

What might cause a theory to change over time?

Olin [163]

Answer:

A theory does not change into a scientific law with the accumulation of new or better evidence. A theory will always remain a theory

Explanation:

theories and laws could potentially be falsified by countervailing evidence. Theories and laws are also distinct from hypotheses.

5 0

3 years ago