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3 years ago

A horse pulls a sled 100 meters. The horse applies 200 newtons of force. How many joules of work did the horse do?

Physics

1 answer:

MAXImum [283]3 years ago

7 0

Explanation:

work done = force × distance

= 200N × 100m

= 20000J

= 20KJ

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A thin film of oil of thickness t is floating on water. The oil has index of refraction no = 1.4. There is air above the oil. Wh

vesna_86 [32]

Answer:t=0.1205

Explanation:

Given

Refractive index of oil $\left ( \mu \right )=1.4$

Wavelength of red light =675 mm

Condition for constructive interference is

$2\mu _{oil}t=\frac{m\lambda }{2}$

$t=\frac{m\lambda }{4\mu _{oil}}$

For m= 1 i.e. for minimum thickness

$t=\frac{1\times 675\times 10^{-9}}{4\times 1.4}$

$t=0.1205 \mu m$

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3 years ago

Most cars have a coolant reservoir to catch radiator fluid that may overflow when the engine is hot. A radiator is made of coppe

alexandr402 [8]

Answer:

0.699 L of the fluid will overflow

Explanation:

We know that the change in volume ΔV = V₀β(T₂ - T₁) where V₀ = volume of radiator = 21.1 L, β = coefficient of volume expansion of fluid = 400 × 10⁻⁶/°C

and T₁ = initial temperature of radiator = 12.2°C and T₂ = final temperature of radiator = 95.0°C

Substituting these values into the equation, we have

ΔV = V₀β(T₂ - T₁)

= 21.1 L × 400 × 10⁻⁶/°C × (95.0°C - 12.2°C)

= 21.1 L × 400 × 10⁻⁶/°C × 82.8°C = 698832 × 10⁻⁶ L

= 0.698832 L

≅ 0.699 L = 0.7 L to the nearest tenth litre

So, 0.699 L of the fluid will overflow

6 0

3 years ago

Betelgeuse is 100,000 times more luminous than our sun, which means that it releases an estimated 3.846 x 1031 W of luminous lig

denis-greek [22]

Answer:

5.4 × 10⁸ W/m²

Explanation:

Given that:

The Power (P) of Betelgeuse is estimated to release 3.846 × 10³¹ W

the mass of the exoplanet = 5.972 × 10²⁴ kg

radius of the earth = 1.27 × 10⁷ m

half the distance (i.e radius r ) = 7.5 × 10¹⁰ m

a) What is the intensity of Betelgeuse at the "earth’s" surface?

The Intensity of Betelgeuse can be determined by using the formula:

$Intensity \ I = \frac{P}{4 \pi r^2}$

$I = \frac{3.846*10^{31}}{4 \pi (7.5*10^{10})^2}$

I = 544097698.8 W/m²

I = 5.4 × 10⁸ W/m²

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3 years ago

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why did the chicken cross the road answer: To get to the OTHER side why would chicken cross a highway to get to the other side.

adoni [48]

Answer: Some jokes make no sense tbh

Explanation:

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3 years ago

Convert-73°c to kelvin scale

pantera1 [17]

Answer:

200 K

Explanation:

0 °C = 273 K

-73°C = 273 K - 73 K = 200 K

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3 years ago

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