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3 years ago

Can u help me with answering these:

Physics

1 answer:

Leni [432]3 years ago

7 0

Answer:

Radio waves

Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation.

Explanation:

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A small charged sphere is attached to a thread and placed in an electric field. The other end of the thread is anchored so that

VMariaS [17]

Answer:

$E = 9.66\times 10^{-6} N/C$

direction is Horizontal

Explanation:

As we know that the string is horizontal here

so the tension force in the string is due to electrostatic force on it

now we will have

$F = qE$

so here the force is tension force on it

$F = 6.57 \times 10^{-2} N$

$Q = 6.80 \times 10^3 C$

now we have

$6.57 \times 10^{-2} = (6.80 \times 10^3)E$

$E = 9.66\times 10^{-6} N/C$

direction is Horizontal

4 0

4 years ago

Condensation happens when moist air ____. A. gains heat by radiation and warms B. warms adiabatically as it sinks to a lower ele

alina1380 [7]

Answer:

C. cools adiabatically as it sinks to a lower elevation

Explanation:

Condensation is the phenomenon where there is a change of the state of matter from gas phase to liquid phase. Vaporization is the reverse of condensation. If a process occurs without the transfer of heat and mass of a thermodynamic system with its surroundings then it is known as an adiabatic process.

Moist air consists of water in gaseous state, so when it is cooled without any exchange of mass or heat there is change of phase.

5 0

3 years ago

Which of the following would decrease current flow in a circuit made originally from a 6-volt battery, a loop of wire, and a swi

Oduvanchick [21]

For a given closed circuit the current voltage and resistance of circuit is related with ohm's law

$V = i*R$

here

V = voltage difference due to battery

i = current flow in the circuit

R = resistance

so from above equation

$i = \frac{V}{R}$

so in order to decrease the current in the circuit we can either increase the resistance of the circuit or decrease the voltage

Now the formula of resistance is

$R =\rho \frac{L}{A}$

here

$\rho$ = resistivity of material of resistance

$L = resistance$

A = crossectional area

a) if we use a thick wire the as per above formula of resistance the value of resistance will decrease.

And hence the current will increase in the circuit so it is not correct option

b) If 6V battery is replaced by 12 V battery then due to increase in potential difference the current in the circuit will also increase, so this is not correct answer.

c)Opening the switch will decrease the voltage from 6 V to 0 Volt

due to this decrease in potential difference the current in the circuit will also decrease. So by Opening the switch the current will be decreased in this circuit.

8 0

3 years ago

Which fundamental forces s the unification of two forces?

uysha [10]

Answer

Correct Answer is C (Electromagnetic force)

Explanation:

weak nuclear force

The weak nuclear force acts inside individual nucleons. Weak nuclear force are short ranged forces. Weak nuclear force allows protons to turn into neutrons and vice versa through beta decay.

Strong nuclear force

Strong force is responsible for binding together the particles which built up a proton or neutron. It is responsible for holding the nuclei of atoms together,

Electromagnetic forces

Electromagnetic force is the force which act between charged particles. It is the unification of two forces (electric and magnetic force.

Gravity

Gravity is a force which acts between all bodies which have mass. It always attracts objects together, and although it is the weakest fundamental force. The force of gravity pulls objects towards Earth, causing things to fall.

4 0

3 years ago

How much force is needed to keep the bowling ball moving towards the pins once it has

vazorg [7]

Answer:

Explanation:

The amount of force needed needs to be greater than all the forces acting in the opposite direction that the bowling ball was thrown. This includes air resistance, floor friction, gravity, and any other force involved. As long as the force acting on the bowling ball that is causing it to go in the direction of the pins is slightly greater than the opposite acting forces then it will continue in that direction. Since no values are provided we cannot calculate the actual precise value of force needed.

6 0

3 years ago