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3 years ago

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1 answer:

svlad2 [7]3 years ago

4 0

Q #1: Oceanic crust is usually more active than continental. They also differ in thickness, density, age, and chemical composition.
Q #2: Hot fluid material that resides within the earth's crust from which lava and other igneous rocks are developed. <span>Q #3: Folded mountains are formed when two tectonic plates move together. This special movement of the two plates compels sedimentary rocks upwards, which results in folds. </span>

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A rod 14.0 cm long is uniformly charged and has a total charge of 222.0 mc. determine (a) the magnitude and (b) the direction of

Yuri [45]

Electric field due to a charged rod along its axis is given by

$E = \frac{kQ}{(L+r)(r)}$

here we know that

L = 14 cm

r = distance from end of rod

r = 36 - 7 = 29 cm

Q = 222 mC

now we will have

$E = \frac{(9 \times 10^9)(222 \times 10^{-3})}{(0.29)(0.43)}$

$E = 1.6 \times 10^{10} N/C$

6 0

3 years ago

What is the energy of a photon of blue light with a wavelength of 460 nm?

kaheart [24]

Answer: $E=4.321(10)^{-19} J$

Explanation:

The energy $E$ of a photon is given by:

$E=h\nu$ (1)

Where:

$h=6.626(10)^{-34}\frac{m^{2}kg}{s}$ is the Planck constant

$\nu$ is the frequency light

On the other hand, there is an inverse relationship between $\nu$ and the wavelength $\lambda$ :

$\nu=\frac{c}{\lambda}$ (2)

Where:

$c=3(10)^{8} m/s$ is the speed of light

$\lambda=460 nm=460(10)^{-9}m$ is the wavelength

Substituting (2) in (1):

$E=\frac{hc}{\lambda}$ (3)

$E=\frac{(6.626(10)^{-34}\frac{m^{2}kg}{s})(3(10)^{8} m/s)}{460(10)^{-9}m}$

Finally:

$E=4.321(10)^{-19} J$ This is the energy of a photon of blue light, in Joules.

4 0

3 years ago

A number has a atomic number of 9 and an atomic mass of 19 amu. how many protons and how many neutrons are present in the atom

adelina 88 [10]

I think the answer to this is 28.

6 0

4 years ago

A ball of 0.5kg slows down from 5m/s to 3m/s. Calculate the work done inthe process.

dlinn [17]

Answer:

9.8 Joules (rounded to 2 significant figures)

Explanation:

Work done (J)= Force(N) x distance changed (m)

Force= 9.80665 x 0.5kg
Force= 4.90332 Newtons

Distance changed= 5-3
distance changed= 2m/s

--> work done= 4.90332 x 2

work done= 9.8 Joules

5 0

2 years ago

How much potential energy does a 1kg mess have 10m off the ground?

777dan777 [17]

Potential Energy = mass x gravitational acceleration x height
potential Energy = 1 x 9.8 x 10 = 98 joules

3 0

3 years ago