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3 years ago

What units for time must be used in calculating power

Physics

1 answer:

Sladkaya [172]3 years ago

3 0

Answer:what are the options..?

Explanation:

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Describe three electrical appliances that use circuits to convert electrical energy into other forms of energy.

marishachu [46]

We see that around us there are many things that makes use of circuits to make our lives easier Circuits are used to convert electrical energy to other forms of energy. For instance, a heater contains circuits which converts the electrical energy into heat. A circuit in a fan converts the electrical energy into motion. In a doorbell, the circuits are used to convert electrical energy into sound.<span />

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3 years ago

Which of these materials is an example of an insulator?

geniusboy [140]

Rubber. The other three are metals, and therefore good conductors.

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3 years ago

Ships A and B leave port together. For the next two hours, ship A travels at 40.0 mph in a direction 35.0° west of north while t

kompoz [17]

Answer:

Explanation:

Given

Ship A velocity is 40 mph and is traveling 35 west of north

Therefore in 2 hours it will travel $40\times 2=80 miles$

thus its position vector after two hours is

$r_A=-80sin35\hat{i}+80cos35\hat{j}$

similarly B travels with 20 mph and in 2 hours

$=20\times 2=40 miles Its position vector[tex]r_B=40sin80\hat{i}+40cos80\hat{j}$

Thus distance between A and B is

$r_{AB}=\left ( -40sin80-80sin35\right )\hat{i}+\left ( 80cos35-40cos80\right )\hat{j}$

$|r_{AB}|=\sqrt{\left ( -40sin80-80sin35\right )^2+\left ( 80cos35-40cos80\right )^2}$

$|r_{AB}|=103.45 miles$

Velocity of A

$v_A=-40sin35\hat{i}+40cos35\hat{j}$

Velocity of B

$v_B=20sin80\hat{i}+20cos80\hat{j}$

Velocity of A w.r.t B

$v_{AB}=v_A-v_B$

$v_{AB}=\left ( -20sin80-40sin35\right )\hat{i}+\left ( 40cos35-20cos80\right )\hat{j}$

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3 years ago

Which kind of force do you exert on an object when you pull it toward you?

Vilka [71]

It's gravity I believe? I'm not entirely sure.

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3 years ago

Read 2 more answers

A viscous fluid is flowing through two horizontal pipes. They have the same length, although the radius of one pipe is three tim

Rudik [331]

The conservation of the mass of fluid through two sections (be they A1 and A2) of a conduit (pipe) or current tube establishes that the mass that enters is equal to the mass that exits. Mathematically the input flow must be the same as the output flow,

$Q_1 = Q_2$

The definition of flow is given by

$Q =VA$

Where

V = Velocity

A = Area

The units of the flow of flow are cubic meters per second, that is to say that if there is a continuity, the volume of input must be the same as that of output, what changes if the sections are modified are the proportions of speed.

In this way

$Q_A = Q_B$

$Q_B = 2.94*10^2 m^3/s$

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3 years ago