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3 years ago

How does a green leaf appear in red light? Use what you know about reflection and absorption of light.

Physics

2 answers:

Scilla [17]3 years ago

6 0

I think the answer is Black. Hope this helps

skelet666 [1.2K]3 years ago

4 0

Answer: 1.black

Explanation:

A green object, like the leaf in this problem, absorbs all colors of light except for the green color. In fact, the object is able to reflect only the green light, and this is why the object appears green to us: because this is the only color reflected by the leaf.

Therefore, if we hit the leaf with red color, it will appear black: in fact, the leaf is will absorb the red light, and there are no more colors to be reflected - therefore, the leaf will appear black (which corresponds to absence of color).

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Which of the following describes how the mechanical advantage of a simple machine affects the amount of force needed for work? A

Simora [160]

Answer:

The answer is a

Explanation:

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2 years ago

Two skiers arrive at the bottom of a ramp travelling at the same speed. Friction may be ignored in this problem. One skier is an

inysia [295]

Answer:

Both will reach to same height

Explanation:

Here we can see that friction is to be ignored

so we can say that work done by all the non conservative forces is change in mechanical energy

Since all non conservative forces here is zero

so mechanical energy is conserved here

so here we can say that sum of initial kinetic energy and potential energy = sum of final kinetic energy and potential energy

So we will have

$\frac{1}{2}mv^2 = mgH$

now maximum height is given as

$H = \frac{v^2}{2g}$

so here we can say that greatest height will be independent of the mass so they both will reach at same height

6 0

3 years ago

Sonar is a device that uses reflected sound waves to measure underwater depths. If a sonar signal has a frequency of 288 Hz and

mart [117]

Answer:

5.03 m

Explanation:

The wavelength of a wave is given by

$\lambda=\frac{v}{f}$

where

v is the speed of the wave

f is the frequency of the wave

For the sonar signal in this problem,

$f=288 Hz$

$v=1.45\cdot 10^3 m/s$

Substituting into the equation, we find the wavelength:

$\lambda=\frac{1.45\cdot 10^3 m/s}{288 Hz}=5.03 m$

3 0

3 years ago

What is tensile stress?

Rasek [7]

Tensile strength is the amount of tension a material can hold, at least I hope that’s what it is.

5 0

3 years ago

Two concentric, coplanar, circular loops of wire of different diameter carry currents in the same direction. Describe the nature

Ierofanga [76]

Answer:

Both will be attractive in nature.

Explanation:

In the given case, the direction of the magnetic field is same in both loops as the direction of the current is same in both loops. When two parallel straight wire carrying current in the same direction are brought close to each other, the force between them is attractive in nature. In the same way, when two coplanar, circular and concentric loops of wire are carrying current in the same direction, the force between them is attractive in nature. It can be checked by using right hand thumb rule.

Check out other explanations.

brainly.com/question/15555539

#SPJ10

4 0

2 years ago