3 years ago

What causes the earth's tectonic plates to move around?

1 answer:

6 0

Plates at our planet's surface move because of the intense heat in the Earth's core that causes molten rock in the mantle layer to move.

You might be interested in

Which rule(s) is used for combining velocities?

DIA [1.3K]

Answer: B. Vector rules

Explanation:

4 0

3 years ago

A student performs Young’s double-slit experiment with slits that are separated by 0.160 mm. She observes the interference patte

Bogdan [553]

Answer:

Wavelenght is 4.53x10^-7m

Explanation:

Detailed explanation and calculation is shown in the image below

5 0

2 years ago

All of following are types of kinetic energy EXCEPT for: *

Valentin [98]

Light energy is not kinetic energy

7 0

3 years ago

A soccer ball is kicked horizontally. What is the average speed if its distance is 21.0 m after 4.00 s?

Over [174]

The answer would be 5.25 m/s

5 0

3 years ago

The electron affinity of thulium has been measured by a technique known as laser photodetachment electron spectroscopy. In this

antoniya [11.8K]

Answer:

ΔE = 1.031 eV

Explanation:

For this exercise let's calculate the energy of the photons using Planck's equation

E = h f

wavelength and frequency are related

c = λ f

f = c /λ

let's substitute

E = h c /λ

let's calculate

E = 6.63 10⁻³⁴ 3 10⁸/1064 10⁻⁹

E = 1.869 10⁻¹⁹ J

let's reduce to eV

E = 1.869 10⁻¹⁹ J (1 eV / 1.6 10⁻¹⁹ J)

E = 1.168 eV

therefore the electron affinity is

ΔE = E - 0.137

ΔE = 1.168 - 0.137

ΔE = 1.031 eV

3 0

3 years ago