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3 years ago

8

Which has more energy, a photon of ultraviolet radiation or a photon of yellow light?

1 answer:

noname [10]3 years ago

4 0

Answer:

The ultraviolet light has more energy

Explanation:

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Vitek1552 [10]

Answer:

water

is missing in above equation

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2 years ago

What do echolocation and ultrasounds have in common?

Natali5045456 [20]

They both are mechanical waves.

Explanation:

Echolocation and ultrasounds are both mechanical waves that require a medium to trace through. They both process and transfer information through waves; the difference is that we humans cannot hear ultrasound waves.

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2 years ago

I will fan and give 2 medals!!!!!!

Maksim231197 [3]

<span> Corona </span>

<span>I. </span>Rare gaseous envelope

<span>II. </span>Irregular pearly glow

<span>III. </span>Total solar eclipse

<span>IV. </span>Surrounds darkened moon

<span>V. </span>Caused by diffraction

<span> Solar Prominence </span>

<span>I. </span>loop shape

<span>II. </span>large bright gaseous

<span>III. </span>luminous hydrogen gas

<span>IV. </span>rises above chromospheres

<span>V. </span>anchored to surface (sun’s surface)

<span> Solar Flare </span>

<span>I. </span>Intense High-energy

<span>II. </span>Causes electromagnetic disruptions

<span>III. </span>In solar atmosphere

<span>IV. </span>Varies in brightness

<span>V. </span>Emits radiation

<span> Sunspots </span>

<span>I. </span>Surface dark spots

<span>II. </span>Strong magnetic fields

<span>III. </span>Solar magnetic storms

<span>IV. </span> Visible through telescope

<span>V. </span>Cooler than photospheres

I did this in class I got 100%

7 0

3 years ago

A 20 kg wagon is rolling to the right across a floor. A person attempts to catch and stop the crate and applies a force of 70 N,

Serggg [28]

Answer:

1.736m/s²

Explanation:

According to Newton's second law;

$\sum F_x = ma_x\\$

$Fm - Ff = ma_x\\$ where;

Fm is the moving force = 70.0N

Ff is the frictional force acting on the body

$Ff = \mu R\\Ff = \mu mg\\$

$\mu$ is the coefficient of friction

m is the mass of the object

g is the acceleration due to gravity

a is the acceleration/deceleration

The equation becomes;

$Fm - Ff = ma_x\\Fm - \mu mg = ma\\$

Substitute the given parameters

$Fm - \mu mg = ma\\70 - 0.18(20)(9.8) = 20a\\70-35.28 = 20a\\34.72 = 20a\\a = \frac{34.72}{20}\\a = 1.736m/s^2\\$

Hence the deceleration rate of the wagon as it is caught is 1.736m/s²

7 0

3 years ago

A Carnot heat engine has an efficiency of 0.400. If it operates between a deep lake with a constant temperature of 298.0k and a

tatuchka [14]

Answer:

496.7 K

Explanation:

The efficiency of a Carnot engine is given by the equation:

$\eta = 1 - \frac{T_H}{T_L}$

where:

$T_H$ is the temperature of the hot reservoir

$T_C$ is the temperature of the cold reservoir

For the engine in the problem, we know that

$\eta = 0.400$ is the efficiency

$T_C = 298.0 K$ is the temperature of the cold reservoir

Solving for $T_H$ , we find:

$\frac{T_C}{T_H}=1-\eta\\T_H = \frac{T_C}{1-\eta} =\frac{298.0}{1-0.400}=496.7 K$

6 0

3 years ago