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4 years ago

7

Can the answer to density be simplified

1 answer:

kenny6666 [7]4 years ago

7 0

Answer: yes because all densities can be simplifed it just depends on the number.

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Read the following excerpt about water availability to living organisms.

lapo4ka [179]

Answer:

1 percent

Explanation:

It says that only 3 percent of the water is fresh. So it can be 1 percent or 3 percent. But then it says that most of the water is locked up in glaciers and polar ice caps. So the animals would have a hard time getting to this water. So the rest is available for them. Approximately 1 percent is most reasonable.

5 0

4 years ago

Read 2 more answers

Can anyone help me learn Malus's law in optics?

Harlamova29_29 [7]

Answer:

It is also called law of Malus,the law states that the intensity of a beam of plane-polarized light after passing through a rotatable polarizer varies as square of the cosine of the angle through which the polarizer is rotated from the position that gives maximum intensity expand.

Before u can know it u have to understand it, so go through it over and over again and u will get it.

8 0

3 years ago

A laser beam is incident on two slits with a separation of 0.230 mm, and a screen is placed 4.75 m from the slits. If the bright

Mariulka [41]

Answer:

$7.55\times 10^{-7} m$

Explanation:

We are given that

d=0.23 mm= $0.23\times 10^{-3} m$

$1mm=10^{-3} m$

Screen is placed from the slits at distance ,L=4.75 m

The bright interference fringes on the screen are separated by 1.56 cm.

$\Delta y=1.56 cm=1.56\times 10^{-2} m$

1 m=100 cm

We have to find the wavelength of laser light.

We know that

$\Delta y=\frac{\lambda L}{d}$

Substitute the values

$1.56\times 10^{-2}=\frac{\lambda\times 4.75}{0.23\times 10^{-3}}$

$\lambda=\frac{1.56\times 10^{-2}\times 0.23\times 10^{-3}}{4.75}$

$\lambda=7.55\times 10^{-7} m$

4 0

3 years ago

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?

Illusion [34]

The gravitational potential energy U is defined as the product of mass m, the acceleration of gravity g and the height of object h.

$U = mgh$

We do not have the mass of the hiker. But we know that its W weight is:

$W = mg$

Where

$g = 9.8 m/s^2$

So:

$m = \frac{W}{g}\\\\m = \frac{600}{g}$ .

So:

$U = (\frac{600}{g})gh\\\\U = (600N)(50m)$

$U = 30000$ J

The hiker has gained 30,000 J of energy

6 0

3 years ago

Find the current flowing across the 20 ohm resistor.

Aliun [14]

Answer:

15 is it

Explanation:

6 0

3 years ago