The amount of light energy absorbed by an object depends on what two factors?

Physics

1 answer:

IRISSAK [1]3 years ago

8 0

Answer:

It depends on the electro-magnetic frequency of the light and object's nature of atoms.

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The weight of a body is 420 newton.calculate it's mass

antiseptic1488 [7]

Answer:

42g

Explanation:

the mass of a body is given by

m=weight/gravity

=420/10

=42

I hope this helps

4 0

3 years ago

What are you and the Australian Institute of Marine Biology trying to find out and 4. Why might it be important to find this inf

TEA [102]

Answer:

Established in 1972 by the McMahon Government, the institute's primary function is research for sustainable use and protection of the marine environment. The Institute investigates topics from broad-scale ecology to microbiology.

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2 years ago

Calculate the absolute pressure at the bottom of a freshwater lake at a point whose depth is 29.1 m. assume the density of the w

kykrilka [37]

Absolute pressure at the bottom of the lake = pressure due to water height + Air pressure = Density of water*gravitational acceleration* height + 101.3 kPa

Therefore,
Absolute pressure = 1/1000(1*10^3*9.81*29.1) + 101.3 = 285.471+101.3 = 386.771 kPa

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3 years ago

A patient is administered 20 mg of iodine-131. How much of this isotope will remain in the body after 40 days if the half-life f

igor_vitrenko [27]

The formula for half-life is:

$A_{final}=A_{initial}(\frac{1}{2})^{\frac{t}{h}}$

Where A is the amount of iodine-131 initially and after 40 days, t is time, h is half-life of the isotope. Let's plug in our values to the equation:

$A_{final}=20(\frac{1}{2})^{\frac{40}{8}=0.625g$

Therefore, the patient has 0.625 grams of iodine-131 after 40 days.

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3 years ago

A spring scale hung from the ceiling stretches by 6.1 cm when a 2.0 kg mass is hung from it. The 2.0 kg mass is removed and repl

Hunter-Best [27]

The ideal spring equation is

   Stretch = K times Force .

This says that the stretch is directly proportional to the force.
In simple English, that means that if you double the force, then
you double the stretch, and if you multiply the force by π or
any other number, you multiply the stretch by the same number.

So you can always write a proportion for a spring:

   Stretch₁ / Force₁ = Stretch₂ / Force₂ .

Part A:

In Part-A of this question, the force is increased to (2.5 / 2.0) = 1.25 times .

So the stretch is also increased to 1.25 times .

   (1.25) x (6.1 cm) = 7.625 cm .

6 0

4 years ago