All categories

3 years ago

Help please someone

Chemistry

1 answer:

Ludmilka [50]3 years ago

6 0

<u>Examples of energy:</u> Nuclear, Fossil Fuels, Solar, Wind, Hydroelectric, Geothermal, Kinetic, Mechanical, Potential, and Chemical.

<u>Non-examples:</u> love, atoms, hatred, air, matter, ideas, socket, and batteries.

You might be interested in

Which of the following is not a type of mechanical wave?

Otrada [13]

Concave is not a type of mechanical wave because it doesn’t need a medium for propagation.

3 0

3 years ago

Read 2 more answers

A battery changes chemical energy into _____.

Sophie [7]

It turns chemical into electricity

5 0

3 years ago

Read 2 more answers

In compliance with conservation of energy, Einstein explained that in the photoelectric effect, the energy of a photon (hv) abso

3241004551 [841]

Answer:

a) 1.866 × 10 ⁻¹⁹ J b) 3.685 × 10⁻¹⁹ J

Explanation:

the constants involved are

h ( Planck constant) = 6.626 × 10⁻³⁴ m² kg/s

Me of electron = 9.109 × 10 ⁻³¹ kg

speed of light = 3.0 × 10 ⁸ m/s

a) the Ek ( kinetic energy of the dislodged electron) = 0.5 mu²

Ek = 0.5 × 9.109 × 10⁻³¹ × ( 6.40 × 10⁵ )² = 1.866 × 10 ⁻¹⁹ J

b) Φ ( minimum energy needed to dislodge the electron ) can be calculated by this formula

hv = Φ + Ek

where Ek = 1.866 × 10 ⁻¹⁹ J

v ( threshold frequency ) = c / λ where c is the speed of light and λ is the wavelength of light = 358.1 nm = 3.581 × 10⁻⁷ m

v = ( 3.0 × 10 ⁸ m/s ) / (3.581 × 10⁻⁷ m ) = 8.378 × 10¹⁴ s⁻¹

hv = 6.626 × 10⁻³⁴ m² kg/s × 8.378 × 10¹⁴ s⁻¹ = 5.551 × 10⁻¹⁹ J

5.551 × 10⁻¹⁹ J = 1.866 × 10 ⁻¹⁹ J + Φ

Φ = 5.551 × 10⁻¹⁹ J - 1.866 × 10 ⁻¹⁹ J = 3.685 × 10⁻¹⁹ J

7 0

3 years ago

9.11 x 10^3 in standard notation?

Irina18 [472]

Answer:

the right answer is 9110

3 0

3 years ago

Read 2 more answers

Most elements are ____________. The _____________ elements on the left of the stair-step line on the ______________ of Elements

Vlada [557]

Answer:

metals, 88 , periodic table , luster , heat, electricity , thin, right, opposite , appearance , luster , malleable , ductile, opposite , shiny, moderately

Explanation:

metals, 88 , periodic table , luster , heat, electricity , thin, right, opposite , appearance , luster , malleable , ductile, opposite , shiny, moderately Is the answer.

(Hope this helps can I pls have brainlist (crown)☺️)

4 0

2 years ago