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3 years ago

If the wind or current is pushing your boat away from the dock as you prepare to dock, which line should you secure first?

Physics

1 answer:

Akimi4 [234]3 years ago

7 0

Answer:

Bow Line

Explanation:

If the wind or current is pushing your boat away from the dock, bow line should be secured first.

1- We should cast off the bow and stern lines.

2-With the help of an oar or boat hook, keep the boat clear of the dock.

3-Leave the boat on its own for sometime and let the wind or current carry the boat away from the dock.

4 - As you see there is sufficient clearance, shift into forward gear and slowly leave the area.

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A galvanometer with a resistance of 40.0 ω deflects full scale at a current of 2.0 ma. what resistance should be used with this

kogti [31]

The resistance needed to be added is R
The Current is 2 ma
The voltage reading is a maximum of 50 volts.
The ma meter has an internal resistance of 40 ohms.

Formula
E = I * R

Givens
E = 50
I = 2 ms
R = R + 40

Solution
E = I * R
I = 2 ma [ 1 amp / 1000 ma] = 0.002 amp
50 = 0.002 * (R + 40) Divide by 0.002
50/0.002 = R + 40
25000 = R + 40 Subtract 40 from both sides.
R = 25000 - 40
R = 24960 Answer

8 0

4 years ago

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How can you make an item that is made of magnetic material become a permanent magnet instead of a temporary magnet?

koban [17]

Answer:

Explanation:

You can heat it and then let it cool in a very strong magnetic field.

4 0

3 years ago

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The speed of light in a vacuum is 2.998Ã108 m/s. calculate its speed in miles per hour (miles/h).

snow_tiger [21]

670616629.3844 miles per hour

7 0

3 years ago

Suppose a skydiver (mass = 75 kg) is falling toward the Earth. When the skydiver is 100 m above the Earth he is moving at 60 m/s

Andrej [43]

Answer:

Potential energy = 73.575 kJ

Kinetic energy = 135kJ

Total mechanical energy = 208.575 kJ

Explanation:

The potential energy of a body is given by the expression, PE = mgh, where m is the mass of the body, g is the acceleration due to gravity value and h is the height of the body.

The kinetic energy of a body is given by $KE=\frac{1}{2} mv^2$ , where v is the velocity and m is the mass of body.

Total mechanical energy = Kinetic energy + Potential energy

$KE=\frac{1}{2} mv^2=\frac{1}{2} *75*60^2= 135000J = 135kJ$

PE = mgh = 75*9.81*100 = 73575 J = 73.575 kJ

Total mechanical energy = Kinetic energy + Potential energy = 135+73.575

= 208.575 kJ

4 0

3 years ago

A car slows down uniformly from a speed of 22 m/s to rest in 4.0 seconds. How far did it travel in that time

krek1111 [17]

Answer:

$\boxed{\sf Distance \ travelled = 44 \ m}$

Given:

Initial speed (u) = 22 m/s

Final speed (v) = 0 m/s (Rest)

Time taken (t) = 4 seconds

To Find:

Distance travelled by car (s)

Explanation:

From equation of motion of object moving with uniform acceleration in straight line we have:

$\boxed{ \bold{s = (\frac{v + u}{2} )t}}$

By substituting value of v, u & t in the equation we get:

$\sf \implies s = ( \frac{0 + 22}{2} ) \times 4 \\ \\ \sf \implies s = \frac{22}{2} \times 4 \\ \\ \sf \implies s = 11 \times 4 \\ \\ \sf \implies s = 44 \: m$

$\therefore$

Distance travelled by car (s) = 44 m

4 0

4 years ago