All categories

4 years ago

When copper combines with oxygen to form copper oxide, the charge of the copper ion is

Physics

2 answers:

Archy [21]4 years ago

8 0

The copper and oxygen and oxygen atoms are not ions, and the bonds are more covalent than they are ionic.

saveliy_v [14]4 years ago

4 0

Cu(s)+O2(g)-->CuO
The copper ion will technically have a +2 charge

You might be interested in

A skier with a 65kg mass skies down a 30 degree incline hill. The coefficient of friction is 0.1.

RUDIKE [14]

Part a.
Refer to the diagram shown below.

m = 65 kg, the mass of the skier
θ = 30°, the angle of the incline
μ = 0.1, the coefficient of friction
W = mg , the weight of the skier
N = mg cosθ, the normal reaction
F = mg sinθ, the component of the weight acting down the hill
R = μN, the frictional force resisting motion down the plane
a = the acceleration down the plane.

The weight is
W = mg = (65 kg)*(9.8 m/s) = 637 N

Part b.
The normal force is
N = (637 N)*cos(30) = 551.658 N

The frictional force is
R = 0.1(551.658 N) = 55.1658 N

Part c.
Calculate the component of the weight acting down the hill.
F = mg sin(30) = (637 N)*sin(30) = 318.5 N

The equation of motion is
ma = F - R
(65 kg)*(a m/s²) = 318.5 - 55.1658 N
a = 263.3342/65 = 4.05 m/s²

Answers:
N = 551.7 N
a = 4.05 m/s²

4 0

4 years ago

Identify which best describes the energy used to pluck guitar strings to make sound.

Novay_Z [31]

<span>The correct answer is: Mechanical Energy

Explanation:
As the guitar strings are plunked, the potential energy stored in the strings has an ability to make them vibrate. When the strings are vibrating, that potential energy is actually converted to the kinetic energy. Hence, the whole phenomena contains both the kinetic energy and the potential energy. The sum of kinetic energy and the potential energy is called Mechanical energy. Therefore, the correct answer is Mechanical Energy.</span>

8 0

3 years ago

Read 2 more answers

An automobile tire having a temperature of −1.6 ◦C (a cold tire on a cold day) is filled to a gauge pressure of 22 lb/in2 . What

r-ruslan [8.4K]

Answer:

25.8 lb/in²

Explanation:

Gay-Lussac's law tells us that given an ideal gas of a certain mass has a constant volume, the pressure exerted on the sides of its container is directly proportional to its absolute temperature.

$\frac{P_{1} }{T_{1} } = \frac{P_{2} }{T_{2} } \\\\\frac{22}{-1.6+273.15} =\frac{P_{2} }{45+273.15} \\\\P_{2} = \frac{22*318.15}{271.55} = 25.8lb/in^{2}$

4 0

3 years ago

the efficiency of a solar cell is defined as the percentage of the total energy input that does useful work.

pickupchik [31]

The proportion of the total energy input that is put to use in a solar cell is known as its efficiency, so this is a true statement.

<h3>What is a Solar cell?</h3>

A solar cell, also known as a photovoltaic cell, is a type of electronic device that uses the photovoltaic effect to convert light energy directly into electricity.

<h3>What is Energy?</h3>

Energy is the ability to perform work. It could exist in several different forms, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc. Additionally, there is heat and work, that is energy being transferred from one body to another. It is always assigned based on its nature once it has been transmitted. Thus, heat transmitted may manifest as thermal energy while work performed may result in mechanical energy.

Hence, the proportion of the total energy input that is put to use in a solar cell is known as its efficiency, so this is a true statement.

To know more about energy, check out:

brainly.com/question/13881533

#SPJ4

6 0

1 year ago

One clue we can observe that means a chemical reaction has occurred is the formation of light. What is one chemical reaction you

dimaraw [331]

Answer:

There are five signs of a chemical change:

Color Change.

Production of an odor.

Change of Temperature.

Evolution of a gas (formation of bubbles)

Precipitate (formation of a solid)

Explanation:

I just went ahead and gave you the five signs of chemical change hoped it helped

8 0

3 years ago