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spin [16.1K]
4 years ago
8

an object with a mass of 70kilograms is supported at a height 8meters above the ground. what's the potential energy of the objec

t with respect to the ground ?(a)560J(b)2,058J(c)5,488J(d)3,430J
Physics
1 answer:
ra1l [238]4 years ago
3 0
Gravitational Potential Energy = mgh (m=mass; g=gravitational force(9.8N/kg); h = height)

Ug = (70kg)(9.8N/kg)(8m) = 5488J which is C.)
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A t-rated switch may be used to (its/a) ______ current capacity when controlling an incandescent lighting load.
jok3333 [9.3K]

<u>Rated </u>

A t-rated switch may be used to (its/a) <u>Rated</u> current capacity current capacity when controlling an incandescent lighting load.

<h3>What is "current rating"?</h3>
  • The greatest current that a fuse is rated to carry for an infinite duration without significantly degrading the fuse element is known as the current rating.
  • There is also a large selection of power switching transistors that have voltage ratings well over 1000V and current ratings up to several hundred amps.

<h3>What does the term "rated current" mean?</h3>
  • When an electrical device receives its rated voltage and outputs its rated power, it flows at its rated current.
  • So, when a device is designed for a certain amperage, that amperage is referred to as the equipment's rated current.

<h3>What does electrical "rated" mean?</h3>
  • An electrical appliance's rating reveals the voltage range at which it is intended to operate as well as the current consumption at that range.
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6 0
2 years ago
The Magnetic Dipole Moment of a Coil Problem A rectangular coil of dimensions 5.40 cm ✕ 8.50 cm consists of 25 turns of wire and
butalik [34]

Answer:

a

 \mu =  0.0023 \ A\cdot m^2

b

\tau  =    0.00080  \  N \cdot  m

Explanation:

From the question we are told that

  The dimensions of the  rectangular coil is 5.40 cm ✕ 8.50 cm  = 0.054 m X 0.085 m

   The  number of turns is  N  = 25 \ turns

   The current it  is carrying is  I = 20 \ mA  = 0.02 \  A

    The magnetic field is B = 0.350 \   T

Generally the magnitude of the magnetic dipole moment is mathematically represented as

       \mu = N  *  I *  A

Here  A  is the area which is mathematically represented as

     A =  0.054  * 0.085

=>  A =  0.00459 \  m^2

So  

     \mu = 25  * 0.02 *  0.00459

=>  \mu =  0.0023 \ A\cdot m^2

Generally the  magnitude of the torque acting on the loop is mathematically represented as

    \tau  =  \mu * B

=>\tau  =    0.0023  * 0.350

=>\tau  =    0.00080  \  N \cdot  m

8 0
3 years ago
How is heat transferred by convection?
andriy [413]

Answer:

Convective heat transfer is the transfer of heat between two bodies by currents of moving gas or fluid. In free convection, air or water moves away from the heated body as the warm air or water rises and is replaced by a cooler parcel of air or water.

Explanation:

Hope this helped and have a great day

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2 years ago
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Find fq, the vertical force that pier q exerts on the right end of the bridge.
mariarad [96]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
<span>View the entire bridge as the system, and find the torque about a pivot chosen to eliminate the torque from one of the unknowns
</span>Find the sum of the torques ∑ τ Q about the right pier Q of the bridge. Remember that counterclockwise torque is positive
∑τQ - 2MgL− 3FpL

<span>The sum of the torques is zero
</span>
FP = 2/3 Mg
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3 years ago
7.There is no gain in mechanical advantage in a single fixed pulley. En
AlexFokin [52]

Answer:

The answer to this question can be defined as follows:

Explanation:

Advantage:

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