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Bingel [31]
2 years ago
6

1. A 61-kg woman doing pull-ups lifts her body a distance of 0.32 meters in 1.8 seconds. What is the power provided by her bicep

s?
Physics
1 answer:
Allushta [10]2 years ago
4 0

Answer:

P = mgh/t = 61(9.8)(0.32)/1.8 = 106.275555... ≈ 110 W

Explanation:

Power is the rate of doing work.

The work changes her potential energy.

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a minute or less than a minute

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General adaptation syndrome is made of 3 stages; alarm, resistance, and exhaustion. Reaction is NOT one of these stages.
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A 9.00-cm-long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. The total resistance of the wi
m_a_m_a [10]

Answer:

<em>0.45 N</em>

Explanation:

<em>Let Recall that,</em>

<em> The power formula is:  </em>

<em>   P = E²/R  </em>

Let A = the magnetic field  

<em>Let L = length of wire  = 9.00cm = 0.09 m  </em>

let  R = resistance of wire  = 0.320 Ω

let v =  velocity of the wire = 4 m/s  

<em>Let E = across the wire voltage </em>

Let P = the power of the wire = 4.3 W  

To Solve  for E:  

<em>The formula of E = √PR  </em>

The Voltage from  a magnetic field is given as,

E = vAL  

We therefore Use E = E

√PR = vAL  

to solve  for A,

A= √PR/vL  

BA= √4.3(0.32)/(4)(.09)  -=0.173

A = 0.173 wA/m²

Let F  be  the pulling force  

Let I  be the current in the wire  

P = I²R  

<em>I = √P/R  </em>

F = IAL  

F = √P/RAL  

F = √4.3/.32(0.173)(.09)  

<em>F = 0.45N</em>

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2 years ago
Is it true or false When objects collide, some momentum is lost.
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Answer:

True.

Explanation:

5 0
2 years ago
Read 2 more answers
An 800-W heater raises the temperature of 4 kg of soup by 40 °C in 13 minutes.
Tju [1.3M]

Answer:

Q=0.16*c kJ

Explanation:

Heat transfer and energy changes is related by the equation

Q=mcΔT

where

Q=heat transfer

m=mass of substance

c=specific heat of the material

ΔT= change in temperature

Given

m= 4 kg

c=c

ΔT=40° C

Q=4*c*40

Q=160c

Q=160/1000*c kJ

Q=0.16*c kJ

6 0
3 years ago
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