Hydrogen has three isotopes 1H, 2H, and 3H. What is the difference between these three isotopes?

Answers

Answer 1

Answer: The element Hydrogen has three isotopes. The hydrogen (1H), the deuterium (2H), and tritium (3H) differs in number of their neutrons where hydrogen has none while deuterium has one and tritium has two. They also differ in mass numbers where hydrogen has one while deuterium has two and tritium has three.

Answer 2

Answer:

Its just that the number of neutrons range from 0 to 2. (distance from 1 to 3 is 2)

Not totally sure about this one... I had it as a question in a 25 question test, and this was my answer. I got a 96% on that test, which means I only got one wrong, so this is probably right.

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A printer has a power of 100 W. It takes 30 seconds to print out a document. How much energy will ithave used?

Answers

A printer has power of 100 W, and it takes time of 30 seconds to print out the document, then the power consumed in 30 seconds will be 0.8333 W.

What is Power?

The quantity of energy moved or changed per unit of time is termed as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in historical texts. A scalar quantity is power.

Power is connected to other factors; for instance, the power required to move a land vehicle is equivalent to the sum of the vehicle's velocity, traction force on its wheels, and aerodynamic drag.

Assuming the printer consumes electrical energy at a steady rate, then:

100 ÷ 60 = 1.6667 watts per minute.

Now, calculate the power consumed in 30 seconds,

1.6667 ÷ 2 = 0.8333 watts.

Therefore, the power consumed in 30 seconds will be 0.8333 watts.

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100W translates to 100 watts consumed in 1 hour. Assuming the printer consumes electrical energy at a steady rate, then: 100 ÷ 60 = 1.6667 watts per minute. 1.6667 ÷ 2 = 0.8333 watts consumed in 30 seconds.

What is the KE of a bird, mass 40g flying at 23m/s?

Answers

Answer:

230

Explanation:

You do Ke = kinetic times distance divide by mass

Britain and France signed an entente and became thea. Central Forces.
c. Central Powers.
b. Allied Forces.
d. Axis Powers.

Answers

Allied Forces. they became the allies.

I think B. Allied forces

An element's atomic number is 93. how many protons would an atom of this element have? ???? protons

Answers

Neptunium. Atomic mass 237. 93 protons.

Consider two walls, A and B, with the same surface areas and the same temperature drops across their thicknesses. The ratio of their thermal conductivities is kA/kB=4 and the ratio of the wall thickness is LA/LB=2. The ratio of heat transfer rates through the walls qA/qB is:(a) 0.5

(b) 1

(c) 2

(d) 4

(e) 8

(f) None of them

Answers

Answer:

Explanation:

Heat transfer across the walls due to conduction is given by:

$q = -KA(\Delta T)/(L)$

where,

q = heat transfer rate

K = thermal conductivity

A = Area

ΔT = change in temperature

L = thickness

For wall A:

$q_A = -K_AA(\Delta T)/(L_A)$

For wall B:

$q_B = -K_BA(\Delta T)/(L_B)$

Because the change of temperature and area of walls are the same. Dividing both terms:

$(q_A)/(q_B) = ((K_A)/(L_A) )/((K_B)/(L_B))\n\n (q_A)/(q_B) =((K_A)/(K_B) )/((L_A)/(L_B))$

using values given in the question:

$(q_A)/(q_B) = (4)/(2)\n\n(q_A)/(q_B) = 2$

Therefore, the correct answer is:

(c) 2

Which illustration represent the substance at a higher temperature? Explain.

Answers

The addition of heat energy to a system always causes the temperature of that system to increase. This is always true because you are adding heat of a substance to increase its temperature. For example, you are going to drink a cup of coffee. And you wanted it hot to boost your attention. So you have to use hot water. In order for your water to become hot or warm, you need boil it in a kettle. Note that you are going to use an electric stove. The electric stove gets it energy from the source giving it a hotter temperature to the water in the kettle. You are applying heat energy to warm the water. So, the statement is true.

Answer:

Explanation:

the big paragrah

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