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3 years ago

Is it likely that mesosaurus swam back and forth across the Atlantic Ocean?

Physics

1 answer:

Natalija [7]3 years ago

3 0

No, Their arms and back legs are too short, but the mesosaurus was also a coastal animal! It's very unlikely.

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The mechanical power output of an electric motor is 2.20 hp. The motor is connected to a 120 V source and is 89.0% efficient in

MatroZZZ [7]

Answer:

a) $i = 15.367\,A$ , b) $E = 25.226\,MJ$ , c) $C = 0.771\,USD$

Explanation:

a) Let assume that electric motor is single-phase and operates in DC-mode, so that mechanical power output is:

$\dot W = \eta \cdot i \cdot V$

The current delivered to the motor is:

$i = \frac{\dot W}{\eta \cdot V}$

$i = \frac{(2.20\,hp)\cdot \left(\frac{0.746\,kW}{1\,hp} \right)\cdot \left(\frac{1000\,W}{1\,kW} \right)}{(0.89)\cdot (120\,V)}$

$i = 15.367\,A$

b) The power delivered to the motor is:

$\dot W = i\cdot V$

$\dot W = (15.367\,A)\cdot (120\,V)$

$\dot W = 1844.04\,W$

The energy delivered to the motor during 3.80 hours of operation is:

$E = (1844.04\,W)\cdot (3.80\,h)\cdot \left(\frac{3600\,s}{1\,h}\right)\cdot \left(\frac{1\,MJ}{1000000\,J}\right)$

$E = 25.226\,MJ$

c) The cost to run the motor is:

$C = (0.110\,\frac{USD}{kWh} )\cdot (25.226\,MJ)\cdot \left(\frac{0.278\,kWh}{1\,MJ}\right)$

$C = 0.771\,USD$

3 0

3 years ago

During most of a cell’s life cycle, DNA is found in a mass of loose strands called?

Rasek [7]

Chromosomes that's the answer

7 0

4 years ago

What is the component in a car engine that would detect the need for air?

Ipatiy [6.2K]

Answer:

Control of air–fuel ratio

Oxygen sensors tell the ECU whether the engine is running rich (too much fuel or too little oxygen) or running lean (too much oxygen or too little fuel) as compared to ideal conditions (known as stoichiometric).

Explanation:

4 0

3 years ago

Imagine that you live in Maine. Currently there is a high-pressure area over Maine. If a low-pressure area moves in, how will th

miskamm [114]

I live in maine, windmills

7 0

3 years ago

4. An aluminium bar weighs 17 kg in air. How much force is required

kkurt [141]

Explanation:

1ml = 2.7g

Xml = 1.5g

Divide 1.5 by 2.7 to find X.

Obviously, since 1.5 is less than 2.7, you know the answer will be less than 1.

(it’s .5555555555)

4 0

3 years ago