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Bond [772]
3 years ago
7

Heat thansfer that happens from a distance is called:

Physics
1 answer:
yaroslaw [1]3 years ago
7 0

B. convection is the answer

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True or false A radioactive isotope that can be followed through the steps of a chemical reaction is an indicator.
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Hi, your answer is false.

I hoped I helped and if you need more you could always ask me :)

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A sailboat moves north for a distance of 10.00 km when blown by a wind from the eaxct southeast with a force of 5.00 X 10^4 N. H
Irina-Kira [14]

Answer:

A sailboat moves north for a distance of 10.00 km when blown by a wind from the eaxct southeast with a force of 5.00 X 10^4 N. How much work was done by the wind?

Explanation:

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if weight is the force of gravity on an object, then your weight can change if the force of gravity is different on a different
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Calculate the impulse of a 1kg box that starts from rest and accelerates to 50m/s over a period of 10 seconds.
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Explanation:

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3 years ago
A hydraulic press has one piston of diameter 4.0 cm and the other piston of diameter 8.0 cm. What force must be applied to the s
yan [13]

Answer:

The  force is F_1  = 400.8 \  N

Explanation:

From the question we are told that

   The first  diameter is  d_1 =  4.0 \ cm =  0.04 \ m

   The second diameter is  d_2  =  8.0 \ cm  = 0.08 \  m

   

Generally the first area is  

         A_1  =  \pi  * \frac{d^2_1 }{4}

=>      A_1  = 3.142  * \frac{0.04^2}{4}

=>       A_1  =  0.00126 \ m^2

The  second area is  

     A_2 =  \pi  * \frac{d^2_2 }{4}

     A_2  = 3.142  * \frac{0.08^2}{4}

     A_2  =  0.00503 \ m^2

For a hydraulic press the pressure at both end must be equal .

Generally  pressure is mathematically represented as

    P =  \frac{F}{A}

=>  

   \frac{F_1}{A_1 }  =  \frac{F_2}{A_2 }

=>   F_1  =  \frac{1600}{0.00503}  *  0.00126

=>    F_1  = 400.8 \  N

8 0
3 years ago
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