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Alexxandr [17]
3 years ago
13

Imagine 2 birds leave the same tree at the same time. They both fly at 10mph for 5 min, and 12 mph for 8 min, and 5 mph for 10 m

in. Why do they end up at different places?
Physics
1 answer:
Basile [38]3 years ago
8 0
They’re speed is the same, however they’re velocity is different. Which is their direction
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How many electrons circulate each second through the cross section of a conductor, which has a current intensity of 4A.
guajiro [1.7K]

Answer:

2.5×10¹⁹

Explanation:

4 C/s × (1 electron / 1.60×10⁻¹⁹ C) = 2.5×10¹⁹ electrons/second

8 0
4 years ago
Learning Goal: To understand the concepts explaining the operation of transformers.
Alex

Answer:

Part a)

ZERO

Part b)

N = 10 turns

Explanation:

Part a)

As we know that transformer is used to change the input voltage into required output voltage

Here this input and output is considered only when it will change with time as the whole concept is based upon Faraday's law where we need to change the flux with time.

So if we have input Source is DC source then output voltage will be zero as there is no flux change

Part b)

As we know by the principle of transformer

\frac{V_1}{V_2} = \frac{N_1}{N_2}

\frac{500}{25} = \frac{200}{N_2}

N_2 = 10

so total number of turns in secondary coil must be 10

3 0
3 years ago
Which statement accurately describes the relationship between force and momentum?
ivann1987 [24]

Answer:

A.

Explanation:

momentum depends on weight and speed

4 0
3 years ago
In this problem you will consider the balance of thermal energy radiated and absorbed by a person.Assume that the person is wear
Alekssandra [29.7K]

Answer:

The thermal power emitted by the body is P_t  = 286.8 \ Wm^{-2}

The net power radiated is  P_{net} = 460 \ W

Explanation:

From the question we are told that

   The length of the assumed humT_{room} = 20 ^oCan body is  L =  2.0 m

   The circumference of the assumed human body is  C  =  0.8 \ m

   The  Stefan-Boltzmann constant is  \sigma  =  5.67 * 10^{-8 } \ W\cdot  m^{-2} \cdot  K^{-4}.

    The temperature of skin T_{body} = 30^oC

     The temperature of the room is  

    The emissivity is  e=0.6

The thermal power radiated by the body is mathematically represented as

           P_t  =  e *  \sigma * T_{body}^4

substituting value

        P_t  =  0.6 * 5.67*10^{-8} *  (303)^4

        P_t  = 286.8 \ Wm^{-2}

The net power radiated by the body is mathematically evaluated as

    P_{net}  =  P_t *  A

Where A is the surface area of the body which is mathematically evaluated as

     A =  C* L

substituting values

      A =  0.8 * 2

      A =  1.6 m^2

=>    P_{net} =  286.8 * 1.6

=>   P_{net} =  460 \ W

8 0
4 years ago
6. A technlclan can be electrocuted when working on HEVs or EVs.
Mashcka [7]
B) O False because that’s just what I wanted to put that’s what I think the answer is
7 0
3 years ago
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