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iren2701 [21]
3 years ago
14

An electron experiences a downward force of 12.8×10-19 N while traveling in a magnetic field of 8×10-5 T west, what is the magni

tude of the velocity?
Physics
1 answer:
SashulF [63]3 years ago
4 0

Answer:

v=10^5\ m/s

Explanation:

Given that,

Magnetic force acting on an electron, F=12.8\times 10^{-19}\ N

The magnitude of the magnetic field,B=8\times 10^{-5}\ T

We need to find the magnitude of the velocity. We know that the magnetic force is given by :

F=qvB

Where

v is the velocity

So,

v=\dfrac{F}{qB}\\\\v=\dfrac{12.8\times 10^{-19}}{1.6\times 10^{-19}\times 8\times 10^{-5}}\\\\v=10^5\ m/s

So, the magnitude of velocity is10^5\ m/s.

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Which statement is true for two pieces of iron at the same temperature ? A. The total kinetic energy of their particles is equal
statuscvo [17]

The complete options are;

A. The average kinetic energy of their particles is the same.

B. The total kinetic energy of their particles is equal.

C. Heat flows from the larger object to the smaller object.

D. Heat flows from the object with higher potential energy to the object with lower potential energy.

Answer:

Explanation:

From the relationship between average kinetic energy and temperature, we have the formula;

E_k = (3/2)kT

Where;

k is a constant known as boltzmann constant.

T is known as temperature

We can see that at the same temperature (T), kinetic energy will remain the same because from the formula, E_k depends km only the temperature.

Thus, average kinetic energy of their particles saying that.

3 0
3 years ago
At a constant temperature, the volume of a gas doubles when the pressure is reduced to half of its original value. This is a sta
djyliett [7]

Answer: Boyle’s law

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

P\propto \frac{1}{V}     (At constant temperature and number of moles)

As pressure is decreased to half, the volume is increased to doubled.

Charles' Law: This law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

V\propto T     (At constant pressure and number of moles)

Gay-Lussac's Law: This law states that pressure is directly proportional to the temperature of the gas at constant volume and number of moles.

P\propto T     (At constant volume and number of moles)

Combined gas Law: combining the three laws:

PV\propto T  

6 0
4 years ago
Read 2 more answers
An AC adapter for a telephone-answering unit uses a transformer to reduce the line voltage of 120 V (rms) to a voltage of 9.0 V.
Illusion [34]

Answer:

1. The number of turns on the secondary output is 18

2. The root mean square power delivered to the transformer is 48 Watts.

Explanation:

A transformer is an electronic device that can be used for increasing or decreasing the value of a given voltage. It consists of primary coils and secondary coil of a definte number of turns. When voltage flows in the primary coil, it induces voltage in the secondary coil. The two types are: step-up and step down transformers.

1. For a given transformer,

          \frac{V_{s} }{V_{p} } = \frac{N_{s} }{N_{p} }

where V_{s} is the value of the induced voltage in the secondary coil, V_{p} is he voltage in the primary coil, and N_{s} is the number of turns of the secondary coil, N_{p} is the number of turns in the primary coil.

From the question,

V_{s}  = 9.0 V, V_{p} = 120 V, N_{p} = 240, N_{s} = ?

So that,

           N_{s} = \frac{V_{s}*N_{p}  }{V_{p} }

                = \frac{9 * 240}{120}

               = 18

The number of turns on the secondary output is 18.

2. Power_{rms} = I_{rms} × V_{rms}

                    = 0.4 × 120

                   = 48 W

The rms power delivered to the transformer is 48 Watts.

8 0
3 years ago
Inhaling moves the diapragm (blank) and expand the (blank)
Anastaziya [24]
Inhaling moves the diaphragm CONTRACTS and expand the LUNGS.
7 0
2 years ago
2. Neutrons have a ____<br> charge.<br> a. positive<br> b. negative<br> c. neutral
AnnyKZ [126]

Answer:

b. negative

Explanation:

neutrons have a negative charge and protons have a proton has a positive charge

3 0
3 years ago
Read 2 more answers
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