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2 years ago

From the list below, choose the term that best completes each sentence. Write your answers on the line provided.

Physics

1 answer:

prisoha [69]2 years ago

3 0

(1) Speed in a given direction is called is velocity.

(2) An object is in motion when its distance from a reference point is changing.

(3) Speed can be calculated if you know the distance that an object travels in one unit of time.

<h3>What is motion of an object?</h3>

Motion is the change in position of an object with respect to its surroundings in a given interval of time.

Thus, an object is in motion when its distance from a reference point is changing.

<h3>What is velocity of an object?</h3>

This is the change in displacement with time or speed of an object in a given direction.

Thus, speed in a given direction is called is velocity.

Also, speed can be calculated if you know the distance that an object travels in one unit of time.

Learn more about speed and velocity here: brainly.com/question/21729272

#SPJ1

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The race car was was moving for 3.7 hours and during that time moved 500 miles east. What is the speed? What is the velocity?

vaieri [72.5K]

Speed:

$v = \frac{500 \,\,\mbox{miles}}{3.7 \,\,\mbox{h}}\approx 135.14 mph$

Velocity:

Velocity os speed with director (an oriented vector):

The velocity is 135.14 mph in the direction east

8 0

3 years ago

Scientists studying an anomalous magnetic field find that it is inducing a circular electric field in a plane perpendicular to t

yarga [219]

Answer

The rate at which the magnetic field is changing is $[\frac{dB}{dt} ] = 0.000467 T/s$

Explanation

From the question we are told that

The electric field strength is $E = 3.5mV/m = 3.5 *10^{-3} \ V/m$

The radius is $r = 1.5 \ m$

The rate of change of the magnetic field is mathematically represented as

$\frac{d \phi }{dt} = \int\limits^{} {E \cdot dl}$

Where $dl$ is change of a unit length

$\frac{d \phi}{dt} = A * \frac{dB}{dt}$

Where A is the area which is mathematically represented as

$A = \pi r^2$

$E \int\limits^{} { dl} = ( \pi r^2) (\frac{dB}{dt} )$

$E L = ( \pi r^2) (\frac{dB}{dt} )$

where L is the circumference of the circle which is mathematically represented as

$L = 2 \pi r$

$E (2 \pi r ) = (\pi r^2 ) [\frac{dB}{dt} ]$

$E = \frac{r}{2} [\frac{dB}{dt} ]$

$[\frac{dB}{dt} ] = \frac{E}{ \frac{r}{2} }$

substituting values

$[\frac{dB}{dt} ] = \frac{3.5 *10^{-3}}{ \frac{15}{2} }$

$[\frac{dB}{dt} ] = 0.000467 T/s$

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3 years ago

Se suelta un cuerpo desde la azotea de un edificio de 180m de alto. Luego de 3s se lanza verticalmente hacia abajo otro cuerpo.

NARA [144]

Answer:CcCcccccc

Explanation:

Rfsgqh

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4 years ago

It is possible a tree could fall down, even if no one did anything to it. A. True B. False

hichkok12 [17]

Answer:

This is TRUE

Explanation:

The tree can fall down even though no one did anything to it...

A hard breeze can blow and it can fall down or something else can cause it to topple...

Not only humans can make trees topple over...

PLEASE DO MARK ME AS BRAINLIEST UWU 

Bonne journée ;) 

8 0

3 years ago

Explain the runaway refrigerator effect and the role it may have played in the evolution of Mars.

Fiesta28 [93]

Answer:

Explained

Explanation:

The runway refrigerator effect and the role it would have played in the evolution of Mars can be summarized as follows

The weak gravity of Mars does not allow it have a gaseous atmosphere over it. The thin atmosphere would have lead to lower temperature on mars.In in turn would have lead to freezing of gases thus lowering the temperature further. The thinner atmosphere and colder temperature would lead to loss of most water in the planet.

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3 years ago