3 years ago

The author writes that each part of the ecosystem is as important as another. Based

Physics

1 answer:

Masja [62]3 years ago

3 0

I agreeeeeee do you?

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If you have 100 W expended over 20 s how much energy did it take?

netineya [11]

Power = (work or energy) / (time)

100 W = (energy) / (20 sec)

Energy = 2,000 watt-sec

<em>Energy = 2,000 J</em>

8 0

3 years ago

An ore car of mass 39000 kg starts from rest and rolls downhill on tracks from a mine. At the end of the tracks, 25 m lower vert

Musya8 [376]

Answer:

x = 5.79 m

Explanation:

given,

mass of the car = 39000 Kg

spring constant = 5.7 x 10⁵ N/m

acceleration due to gravity = 9.8 m/s²

height of the track = 25 m

length of spring compressed = ?

using conservation of energy

potential energy is converted into spring energy

$m g h = \dfrac{1}{2}kx^2$

$x =\sqrt{\dfrac{2 m g h}{k}}$

$x =\sqrt{\dfrac{2\times 39000 \times 9.8 \times 25}{5.7 \times 10^{5}}}$

$x =\sqrt{33.5263}$

x = 5.79 m

the spring is compressed to x = 5.79 m to stop the car.

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3 years ago

Two parallel plates are 1 cm apart and are connected to a 500 V source. What force will be exerted on a single electron half way

VladimirAG [237]

Answer: 8*10^-15 N

Explanation: In order to calculate the force applied on an electron in the middle of the two planes at 500 V we know that, F=q*E

The electric field between the plates is given by:

E = ΔV/d = 500 V/0.01 m=5*10^3 N/C

the force applied to the electron is: F=e*E=8*10^-15 N

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3 years ago

A failure of the red-sensitive nerves in the eye to respond to light properly causes

allochka39001 [22]

<span>Color blindness is the failure of the red sensitive nerves in the eye that don't respond to light properly.</span>

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3 years ago

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The energy stored per unit volume of the inductor is called the energy density of the magnetic field. Why?

Marrrta [24]

Answer:

yes because physics want that

7 0

2 years ago