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Natalija [7]
3 years ago
10

A particle with a charge of +4.0 μC has a mass of 5.0 g. What magnitude electric field directed upward will exactly balance the

weight of the particle?
Physics
1 answer:
aleksley [76]3 years ago
3 0

Answer:

E = 12262 V/m

Explanation:

given,

Charge of the particle, q = +4.0 μC

mass of the ball, m = 5 g

Electric field, E = ?

Force due to weight

F = m g

Force due to electric field

F =q E

To balance the weight of particle both the forces must be equal

Electric field exerted on the ball will be equal to

m g = q E

E = \dfrac{m\ g}{q}

E = \dfrac{5\times 10^{-3}\times 9.81}{4\times 10^{-6}}

E = 12262 V/m

Hence, the electric field acting in the particle is equal to E = 12262 V/m

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What direct current in A will produce the same amount of thermal energy, in a particular resistor, as an alternating current tha
vodomira [7]

Answer:

I_{rms}= 4.314 AExplanation:According to the definition of the root mean square value of current, the value of direct current which passes through the same circuit in which an alternating current is passing and producing same amount of heat as the direct current produced is called root mean square value of current. So, the relation between the root mean square value of current and the peak value of alternating current is given by [tex]I_{rms}=\frac{I_{0}}{\sqrt{2}}

I_{rms}=\frac{6.1}}{\sqrt{2}}

[tex]I_{rms}= 4.314 A

6 0
3 years ago
Which of the following statements is true for ideal gases, but is not always true for real gases?
xxMikexx [17]

Answer:

C. Replacing one gas by another under the same conditions, has no effect on pressure.

Explanation:

Ideal gas:

 A gas is treated as an ideal gas if temperature is high and pressure is low.

Kinetic energy for ideal gas given as

K.E.=\dfrac{3}{2}KT

So when temperature of gas is increases then  Average molecular kinetic energy will also increases.

The size of molecule is negligible as compare to the dimension of container. It mean that volume occupied by molecule is less as compare to the volume of container.

The between molecules is perfectly elastic.

Ideal gas equation

P V = m R T

So the option C is not always true.

4 0
3 years ago
State ohms law and explain the terms associated with it​
stich3 [128]

Explanation:

Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit. To students of electronics, Ohm's Law (E = IR)

3 0
3 years ago
Read 2 more answers
Determine the speed of sound in air at 300 K. Also determine the Mach number of an aircraft moving in the air at a velocity of 3
amm1812

Answer:

c_3_0_0_K=347.19m/s

M=0.864

Explanation:

The speed of sound in the air increases 0.6 m / s for every 1 ° C increase in temperature.  An approximate speed can be calculated using the following empirical formula:

c=331.5+0.6\vartheta

Where:

\vartheta=T-273.15K\\\\

A more exact equation, usually referred to as adiabatic velocity of sound, is given by the following formula:

c=\sqrt{k*R*T}

Where:

R= Gas\hspace{3}constant\hspace{3}of\hspace{3}air=0.287kJ/kg*K=287J/kg*K\\k=Specific\hspace{3}heat\hspace{3}ratio=1.4\\T=Temperature=300K

Hence:

c=\sqrt{(287)*(1.4)*(300)} =347.1887095\approx347.19m/s

Now, the Mach number at which an aircraft is flying can be calculated by:

M=\frac{u}{c}

Where:

u= Velocity\hspace{3}of\hspace{3}the\hspace{3}moving\hspace{3}aircraft\\c= Speed\hspace{3}of\hspace{3}sound\hspace{3}at\hspace{3}the\hspace{3}given \hspace{3}altitude

Therefore:

M=\frac{300}{347.19} =0.8640833984\approx0.864

5 0
4 years ago
The force of attraction between 2 objects is called gravity. Why do you think that an object, like your notebook, pulled towards
Gekata [30.6K]
This question is asking: Why does gravity occur? why will your notebook get pulled towards you?
6 0
3 years ago
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