Mercury boils at 357C and freezes at -38.9C. Convert these temperatures<br> to Kelvin.

An electron in orbit around a (one proton) nucleus has a speed of about 106 m/s. Deduce the equivalent current due to the motion

dedylja [7]

Answer:

(a) $-4.8\times 10^{-4}A$ (B) $4.22\times 106{-24}A/m^2$

Explanation:

We have given the the speed of the electron =10^6 m/sec

The time period of the electron is given by $T=\frac{2\pi r}{v}$ where r is the Bohr radius, which is equal to $5.29\times 10^{-11}m$

So time period $T=\frac{2\times \pi \times 5.29\times 10^{-11}}{10^6}=3.324\times 10^{-16}m/sec$

(A) We know that current $i=\frac{q}{T}=\frac{-e}{T}=\frac{-1.6\times 10^{-19}}{3.324\times 10^{-16}}=-4.8\times 10^{-4}A$

(B) Magnetic moment is given by $\mu =IA$ , where I is current and A is area

So $\mu =IA=-4.8\times 10^{-4}\times 3.14\times (5.29\times 10^{-11})^2=4.22\times 10^{-24}A/m^2$

3 0

3 years ago

1. The center of gravity of both cats and humans is roughly in the thoracic region. However, they each bear their weight very di

Mama L [17]

Answer:

Major, weight-bearing structures are the bones of the body that are strong and dense to be able to bear the weight of the body. The major, weight-bearing structures of cat and human skeletons are :

Human skeleton: The body weight of an individual is on his pelvic girdles that are attached to the bones of lower limbs. Thigh bones, leg bones, and bones of feet comprise lower limbs The lower limbs consist of the thigh, the leg, and the foot.

Cat skeleton: cats are quadrupedal so it bears all the body weight on shoulders and legs that includes the Scapula and pelvis.

6 0

3 years ago

Wave A has an amplitude of 2, and wave B has an amplitude of 2. What will happen when the crest of wave A meets the trough of wa

Nataly [62]

They will interfere to create a crest with an amplitude of 0 as it’s basically addition so 2 + (-2) would equal 0 as they cancel out

6 0

3 years ago

Read 2 more answers

Why do you think that it’s fairly easy for the sun to fuse hydrogen atoms, but a lot harder to fuse helium atoms?

liq [111]

Answer: Because it involves a process called the proton-proton chain.

Explanation:

Two protons (hydrogen-1) fuse together, producing deuterium (hydrogen-2) and other particles plus energy,Deuterium (hydrogen-2) and a proton (hydrogen-1) fuse, producing helium-3 and energy,Two helium-3 nuclei fuse together, producing helium-4, two protons (hydrogen-1), and energy,Helium-3 fuses with helium-4, producing beryllium-7, which decays and then fuses with another proton (hydrogen-1) to yield two helium-4 nuclei plus energy

8 0

4 years ago

There is a scale with a basket on it. A brick, brick #1 is placed on the scale. The brick has a mass of 10 kg. What are the two

Alla [95]

Answer:

Weight and reaction.

Explanation:

With respect to Newton's third law of motion, action and reaction have equal magnitude but acts in opposite direction.

Thus, the brick of mass 10 kg has its weight (due to gravitational pull of the earth), which acts downwards through its center of mass. This makes the scale to produce an opposing force of equal magnitude, which acts upwards. These two forces acting in opposite directions balancing each other.

The two forces acting on the brick are: its weight and the reaction from the scale.

5 0

3 years ago

Mercury boils at 357C and freezes at -38.9C. Convert these temperatures to Kelvin.