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Afina-wow [57]
3 years ago
13

A skier traveling downhill has this type of energy

Chemistry
1 answer:
krok68 [10]3 years ago
7 0
A skier traveling downhill has kinetic energy, because they are moving.
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How to Calculate the de Broglie wavelength for each of the following ? a. an electron with a velocity 10.% of the speed of light
qaws [65]
H = planks constant 
<span>m = mass of the object </span>
<span>u = velocity of the object </span>

<span>h = 6.626 * 10^-34 J/s </span>
<span>the mass of an electron is 9.12*10^-31 kg </span>
<span>10% speed of light = 10% * 3*10^8 = 3*10^7 m/s, i dont have my graphing calc with me right now so i leave the technicalities up to you </span>
8 0
3 years ago
Which of the following is the correct equation for the reaction below?
fenix001 [56]

Answer:

Option C.

2 Mg (s) + O₂(g) →  2MgO (s)

Explanation:

Two moles of magnesium solid react with one mol of oxygen gas to

form two moles of magnesium-oxide solid

2 Mg (s) + O₂(g) →  2MgO (s)

That's the reaction for the magnessium oxide's formation.

Be careful cause we do not say molecules, they are moles.

The stoichiometry indicates the number of moles that react and the moles which are produced.

It is a redox reaction, because the magnessium is oxidized and the oxygen is reduced. Both elements, changed the oxidation states.

4 0
3 years ago
Read 2 more answers
"A base is a substance that produce OH-ions." Which definition of a base is this?
Andru [333]

Answer:

C. Arrhenius

An Arrhenius base is a substance that dissociates in water to form hydroxide (OH–) ions. In other words, a base increases the concentration of OH– ions in an aqueous solution.

Explanation:

pls mark as brainliest

3 0
3 years ago
How many Liters are there in 51. 300 cm? (11 = 1000 cm)
Black_prince [1.1K]

Answer:

4,572.67

Explanation:

11 divided by 1000= 90.90

44= 11x

x=4

4 x 11= 4000

44-51.300=6.300

6.300 x 90.90=572.67

4000 + 572.67 = the answer

7 0
3 years ago
What is considered to be an unsafe level of lead in flint michigan water?
Olenka [21]

Answer:

More than 40 percent measured above 5 ppb of lead, which the researchers considered an indication of a “very serious” problem.

7 0
3 years ago
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