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3 years ago

Como puedo ser digna con una persona y bondadosa

Physics

1 answer:

Firlakuza [10]3 years ago

8 0

Answer:

¿Es una pregunta de la escuela o de la vida?

Explanation:

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What is the rate at which work is done in lifting a 35-kilogram object vertically at a constant speed of 5.0 meters per second?

svet-max [94.6K]

Answer:

1.75 kW

Explanation:

First, the rate at which work is done is simply termed Power

m = 35kg

v = 5.0 m/s

since the undergoes a vertical motion g = 10 m/s²

F = W = mg = 35×10 = 350 N

Power = Fv = 350×5 = 1750 Watt

8 0

4 years ago

An electrical field has: direction but not magnitude magnitude but not direction neither magnitude nor direction none of the abo

Elanso [62]

An electric field has both magnitude and direction.
I don't think that's one of the first 3 choices.

3 0

3 years ago

Read 2 more answers

At some instant and location, the electric field associated with an electromagnetic wave in vacuum has the strength 57.5 V/m. Fi

n200080 [17]

Answer:

$1.9167\times 10^{-7}\ T$

$2.9247498849\times 10^{-8}\ J/m^3$

$8.7742496547\ W/m^2$

Explanation:

$\epsilon_0$ = Permittivity of free space = $8.85\times 10^{-12}\ F/m$

$\mu_0$ = Vacuum permeability = $4\pi \times 10^{-7}\ H/m$

E = Electric field = 57.5 V/m

c = Speed of light = $3\times 10^8\ m/s$

Magnetic field is given by

$B=\dfrac{E}{c}\\\Rightarrow B=\dfrac{57.5}{3\times 10^8}\\\Rightarrow B=1.9167\times 10^{-7}\ T$

The magnetic field strength is $1.9167\times 10^{-7}\ T$

Energy density is given by

$u=\dfrac{1}{2}\epsilon_0E^2+\dfrac{1}{2\mu_0}B^2\\\Rightarrow u=\dfrac{1}{2}\times 8.85\times 10^{-12}\times 57.5^2+\dfrac{1}{2\times 4\pi \times 10^{-7}}(1.9167\times 10^{-7})^2\\\Rightarrow u=2.9247498849\times 10^{-8}\ J/m^3$

The energy density is $2.9247498849\times 10^{-8}\ J/m^3$

Power flow per unit area is given by

$\dfrac{P}{A}=uc\\\Rightarrow \dfrac{P}{A}=2.9247498849\times 10^{-8}\times 3\times 10^8\\\Rightarrow \dfrac{P}{A}=8.7742496547\ W/m^2$

Power flow per unit area is $8.7742496547\ W/m^2$

7 0

3 years ago

Thomas Newcomen was the first to produce a working steam engine. Why is the work of James Watt more widely known than the work o

LenaWriter [7]

Answer:

The steam engine of James watt is more efficient than Newcomen ans more suitable for the industrial revolution.

Explanation:

James Watt is more widely know for working steam engine because Watt has created better engine which is suitable for the industrial revolution. The steam engine of James watt is more efficient than Newcomen. Watt developed the condensing arrangement by using piston which lessen the initial pressure leading to effectively worked than Newcomen's

4 0

3 years ago

Bands of waves in the electromagnetic spectrum are arranged in order of

OLEGan [10]

Bands of waves in the electromagnetic spectrum are arranged in order of <span>frequency and wavelength. The answer is letter A. The rest of the choices do not answer the question above.</span>

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4 years ago