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kompoz [17]
3 years ago
15

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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Blocks A (5.00 kg) and B (10.00 kg) move on a frictionless, horizontal surface. Initially, block B is at rest and block A is mov
salantis [7]

Answer: 1.33m/s: 13.326j

Explanation:

M1U1+M2U2=V(M1+M2)

M1=5kg, M2=10kg

U1=4.00m/s, U2=0

5*4+10*0=V(10+5)

20+0=15V

20=15V

V=20/15

V=1.333m/s

K. E=1/2MV^2

K. E= 1/2*15*1.332^2

K. E= 1/2*15*1.77689

K. E=26.65335/2

K. E=13.326j

7 0
3 years ago
A typical raindrop is much more massive than a mosquito and falling much faster than a mosquito flies. How does a mos quito surv
Vesnalui [34]

Answer:

Explanation:

Momentum is conserved in an inelastic collision. In a completely-inelastic collision, both objects have a common final velocity.  Once the relative speed between the mosquito and the raindrop is zero, the mosquito is able to detach from the drop and escape

7 0
3 years ago
If the vertical component of velocity for a projectile is 7.3 meters/second, find its hang time.
weqwewe [10]
The height of the projectile is given by:
h = ut - 0.5at²

The height will be 0 twice, once at t = 0 and the second time at the time when the journey has been completed, or t = hang time.
0 = 7.3t - 0.5(9.81)t²
t = 1.49 seconds
4 0
3 years ago
Acceleration of a refrigerator 30s after a person begins pushing it at a force of 400 N
ryzh [129]

Question: Find acceleration of a refrigerator 30s after a person begins pushing it at a force of 400 N, If the mass of the refrigerator is 10 kg.

Answer:

40 m/s²

Explanation:

Applying,

F = ma................Equation 1

Where F = Force applied to the refrigerator, m = mass of the refrigerator, a = acceleration of the refrigerator.

make a the subject of the equation

a = F/m............ Equation 2

From the question,

Given: F = 400 N, m = 10 kg

Substitute these values into equation 2

a = 400/10

a = 40 m/s²

6 0
2 years ago
Bill is throwing a football at four targets and attempting to knock them over. Which of the following targets will be hardest fo
Naddika [18.5K]
100 g lead target. Lead has a very high density which means even a very small volume and weight quite a lot. So because the lead target weighs only 100 g it's going to be small in size compared to other targets which are all made of lesser dense materials than lead.
7 0
3 years ago
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