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zalisa [80]
3 years ago
9

A police car drives with a constant speed of 60 m/h. How long will it take to travel a distance of 180 kilometers?

Physics
1 answer:
posledela3 years ago
4 0
3000 km; you must first convert 60 m to km, then divide that number by 180. 
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Helppp please i think I know the answer but i want to be sure
Vadim26 [7]

Answer:  D) 0-3 seconds

Explanation:

5 0
1 year ago
What is a machine that continues to work without adding additional energy
Gwar [14]

Answer:

That would be a perpetual motion machine

Explanation:

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3 years ago
Water bubbles up through a hot spring at yellowstone national park. What method of heat transfer is this?
LuckyWell [14K]
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3 years ago
Read 2 more answers
A constant voltage of 12.00 V has been observed over a certain time interval across a 1.20 H inductor. The current through the i
kiruha [24]

Answer:

The time is 0.5 sec.

Explanation:

Given that,

Voltage V= 12.00 V

Inductance L= 1.20 H

Current = 3.00 A

Increases rate = 8.00 A

We need to calculate change in current

\Delta A = 8.00-3.00= 5.00\ A

We need to calculate the time interval

Using formula of inductor

V=L\dfrac{\Delta A}{\Delta t}

\Delta t =\dfrac{L\Delta A}{V}

Where, \Delta A = change in current

V = voltage

L = inductance

Put the value into the formula

\Delta t=\dfrac{1.20\times5.00}{12.00}

\Delta t=0.5\ sec

Hence, The time is 0.5 sec.

5 0
3 years ago
Electrical wire with a diameter of .5 cm is wound on a spool with a radius of 30 cm and a height of 24 cm.
kow [346]

Answer:

a)   # lap = 301.59 rad , b)   L = 90.48 m

Explanation:

a) Let's use a direct proportions rule (rule of three). If one turn of the wire covers 0.05 cm, how many turns do you need to cover 24 cm

          # turns = 1 turn (24 cm / 0.5 cm)

         # laps = 48 laps

Let's reduce to radians

        # laps = 48 laps (2 round / 1 round)

       # lap = 301.59 rad

b) Each lap gives a length equal to the length of the circle

          L₀ = 2π R

          L = # turns L₀

          L = # turns 2π R

          L = 48 2π 30

          L = 9047.79 cm

          L = 90.48 m

6 0
3 years ago
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