PHYSICS HIGH SCHOOL

What is the device used to measure a potential difference in a circuit called?a. ammeter
b. potentiometer
c. voltmeter
d. galvonmeter
e. batterymeter

Answers

Answer 1
Answer:

The device used to measure a potential difference in a circuit is called a voltmeter. The correct option is c.

What is a voltmeter?

The tool used to measure the potential difference between two locations in an electric circuit is called a voltmeter. A voltage meter usually referred to as a voltmeter, is a device that measures the voltage, or potential difference, between two points in an electrical or electronic circuit.

Both of these devices are employed in electric circuits, however, the voltmeter is primarily used to measure the voltage or emf across two points in an electric circuit, whilst the ammeter is mostly used to measure the flow of current.

Depending on the measurement, voltmeters are divided into two categories: DC voltmeters and AC voltmeters.

Therefore, the correct option is c. voltmeter.

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Answer 2
Answer: A voltmeter is the instrument used to measure a potential difference between two points in an electric circuit

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a person runs 27.0km west then turns around and runs 13.0km east what's the distance and displacement ?

Answers

Answer:

See below

Explanation:

Distance = 27 + 13 = 40 km

Displacement = 27 - 13 = 14 km

The light bulb in your room is not very bright. You want to use a concave mirror to direct its illumination into a tight, parallel beam of light for reading. The radius of curvature of the mirror is 30 centimeters. At what distance from the mirror should you place the light bulb to produce this parallel light beam

Answers

A point source is to be used with a concave mirror to produce a beam of parallel light. The source should be placed midway between the center of curvature and the mirror. To solve this question you have to draw a ray diagram. Apply the mirror equation to determine the image distance and finally make sure that the first two steps are consistent with each other.


I hope this helps, Regards.

Read the following dream interpretation and answer the question that follows."I suspect that the patient's dream of being chased originates from his unresolved feelings of guilt during childhood."
What perspective of dream interpretation is being offered?
A. Freudian
B. activation-synthesis
C. Jungian
D. motivation

Answers

Answer:

Freudian

Explanation:

Answer:

Freudian

Explanation:

Deimos completes one (circular) orbit of Mars in 1.26 days. The distance from Mars to Deimos is 2.35×107m. What is the centripetal acceleration of Deimos?

Answers

Answer:

The centripetal acceleration of Deimos is 0.077m/s^(2).

Explanation:

The centripetal acceleration is defined as:

a = (v^(2))/(r)   (1)

Where v is the velocity of Deimos and r is the orbital distance.        

Notice that is necessary to determine the velocity first.

The speed of the Deimos can be found by means of the Universal law of gravity:

F = G(M \cdot m)/(r^(2))  (2)

Then, replacing Newton's second law in equation 2 it is gotten:

m\cdot a = G(M \cdot m)/(r^(2))  (3)

However, a is the centripetal acceleration since Deimos almost describes a circular motion around Mars:

a = (v^(2))/(r)  (4)

Replacing equation 4 in equation 3 it is gotten:

m(v^(2))/(r) = G(M \cdot m)/(r^(2))

m \cdot v^(2) = G (M \cdot m)/(r^(2))r

m \cdot v^(2) = G (M \cdot m)/(r)

v^(2) = G (M \cdot m)/(rm)

v^(2) = G (M)/(r)

v = \sqrt{(G M)/(r)}  (5)

Where v is the orbital speed, G is the gravitational constant, M is the mass of Mars, and r is the orbital radius.    

v = \sqrt{((6.67x10^(-11)N.m^(2)/kg^(2))(6.39x10^(23)kg))/(2.35x10^(7)m)}

v = 1346m/s

Finally, equation 4 can be used:

a = ((1346m/s)^(2))/(2.35x10^(7)m)

a = 0.077m/s^(2)

Hence, the centripetal acceleration of Deimos is  0.077m/s^(2).

Final answer:

The centripetal acceleration of Deimos, one of Mars' moon, can be calculated using its orbital period and distance from Mars. Convert the time units to seconds and use the formulas for velocity and centripetal acceleration to get an answer of approximately 7.84x10^-5 m/s^2.

Explanation:

To find the centripetal acceleration of Deimos, we can use the formula for centripetal acceleration, which is a =v^2/r , where v is the velocity and r is the radius (distance from Mars to Deimos). The velocity can be found using the formula v = 2πr/T, where T is the period (time for one complete orbit).

First, convert the days into seconds because the SI unit of time in physics is second. So, 1.26 days = 1.26 * 24 * 60 * 60 = 108864 seconds.

Then, calculate the velocity: v = 2 * π * 2.35x10^7m / 108864s = 1.36 km/s.

Finally, substitute v and r into the centripetal acceleration formula: a = (1.36x10^3m/s)^2 / 2.35x10^7m = 7.84x10^-5 m/s^2.

The centripetal acceleration of Deimos is approximately 7.84x10^-5 m/s^2.

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What characteristics of EM waves did you discover?

Answers

The characteristics of electromagnetic waves typically represent as follows:

  • There are changes in the electric and magnetic fields simultaneously so that both fields have maximum and minimum values ​​at the same time and place.
  • The direction of the electric field and the magnetic field are perpendicular to each other. The direction of both is perpendicular to the direction of the wave propagation.
  • The shape of electromagnetic waves is transverse waves.
  • It has general wave characteristics like polarization, reflection, refraction, interference, and diffraction.
  • The amount of the electric field (E) is directly proportional to the magnitude of the magnetic field, with the relationship E = cB.
  • The universal constant of the velocity of electromagnetic waves in a vacuum is \boxed{ \ c = 3 * 10^8 \ m/s. \ }
  • The speed at which electromagnetic waves propagate depends merely on the electrical and magnetic properties of the medium that it travels on.
  • Because electromagnetic waves do not contain an electric charge, they do not experience any possible deviation in the electric or magnetic fields.

Further explanation

  • Two physicists who contributed significantly to developing the concept of electromagnetic waves are Faraday and Maxwell around 1831-1864.
  • From the observations, Faraday suggested that changes in the magnetic field cause an electric charge to flow in the loop of wire, contributing in the emergence of an electric field.
  • Maxwell proposed a reverse process, which is a change in the electric field will generate a magnetic field.
  • As follows, according to Faraday's Law, changes in sinusoidal magnetic fields generate electric fields which also change sinusoidally.
  • Meantime, according to Maxwell's Hypothesis, changes in sinusoidal electric fields generate magnetic fields which also change sinusoidally.
  • Furthermore, there is a process of combining electric and magnetic fields that propagate in all directions called electromagnetic waves.

Learn more

  1. About vector components brainly.com/question/1600633
  2. Determine the shortest wavelength in electron transition brainly.com/question/4986277
  3. Particle's speed and direction of motion brainly.com/question/2814900

Keywords: the characteristics, electromagnetic waves, transverse, vacuum, electric fields, magnetic, perpendicular, propagation, Maxwell, Faraday, the speed, polarization, reflection, refraction, interference, and diffraction

Answer: reflection

Refraction

Energy

Speed

Explanation:

Reflection results when em wave hits a plane surface and returns in the same angle it incident

Refraction is the change in velocity and direction of em wave as it crosses boundaries of different medium

The energy of em wave is evenly distributed in electric field and magnetic field

The speed of em wave is the same as 3×10^8

What is the only force acting on an object orbiting Earth?A. air resistance
B. friction
C. inertia
D. gravity

Answers

The correct answer to the question is D). Gravity.

EXPLANATION:

Before coming into any conclusion, first we have to understand centripetal force.

Centripetal force is the force which is required to keep a body moving in a circular path. This force always acts along the radius and towards the centre.

As per the question, the object is moving around the earth. As it is moving in a orbit, it needs a centripetal force which will help the object stick to the orbit.

The centripetal force required is provided to the object by the gravitational force of earth .

Air resistance and friction play no role in imparting centripetal force to the object.

Hence, the correct option of this question is gravity, which is the only force that acts on an object orbiting earth.
  im pretty sure its gravity
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