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marshall27 [118]
3 years ago
7

A total distance of 4.5km. The overall journey takes 0.62h, whats the average velocity

Physics
1 answer:
Westkost [7]3 years ago
6 0

Answer:

7.3km/hr

Explanation:

v=d/t=4.5km/0.62hrs=7.3km/hr

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An electric motor has an effective resistance of 22 22 and an inductive reactance of 72 12 when working under load. The voltage
Alecsey [184]

Answer:

Current amplitude, I = 5.57 A

Explanation:

It is given that,

Effective resistance, R = 22 ohms

Inductive reactance, L = 72 ohms

Voltage of the alternating source, V = 420 volt

The total impedance of the RL circuit is given by :

Z=\sqrt{R^2+L^2}

Z=\sqrt{(22)^2+(72)^2}

Z = 75.28 ohms

From Ohm's law,

V=I\times Z

I=\dfrac{V}{Z}

I=\dfrac{420}{75.28}

I = 5.57 A

So, the current amplitude of the electric motor is 5.57 A. Hence, this is the required solution.

6 0
4 years ago
Which of the following quantities would be acceptable representations of weight? Check all that apply.
Oxana [17]

Only 12 lb and 1600 kN .

7 0
3 years ago
What adaptation in frogs enables them to swim​
Flauer [41]

Answer:

Most of the frogs have webbed feet which helps them swim. The thin skin between the toes helps them to push through the water. The frog's feet is webbed ,So they can easily swim.. The skin between toes are flexible soo they can freely push and pull it

Explanation:

6 0
4 years ago
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Which describes how chemical changes are different from physical changes?
lions [1.4K]

Answer:

B. Chemical changes involve the formation of a new substance.

Explanation:

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6 0
4 years ago
Which of the following is equivalent to 140 centiliters?
stiks02 [169]
<span>The answer 0.00140 kiloliters 
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7 0
3 years ago
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