All categories

4 years ago

Which travels at the greatest speed?

1 answer:

5 0

"Light through a vacuum" is the one among the following choices given in the question that shows which can travel at the greatest speed. The correct option among all the options that are given in the question is the fourth option or option "D". I hope that this is the answer that has come to your desired help.

You might be interested in

A 4.4 kg marble (really big heavy marble) is accelerating down an incline. When it reaches level ground it slows down to a stop

KengaRu [80]

Mass=4.4kg

acceleration=-1.74m/s^2

Use newtons second law

$\\ \rm\longmapsto Force=ma$

$\\ \rm\longmapsto Force=4.4(-1.74)$

$\\ \rm\longmapsto Force=-7.656N$

initial velocity=u

Final velocity=v=0

Acceleration=a=-1.74m/s^2

Time=t=1.27s

$\\ \rm\longmapsto a=\dfrac{v-u}{t}$

$\\ \rm\longmapsto u=v-at$

$\\ \rm\longmapsto u=0-(-1.74)(1.27)$

$\\ \rm\longmapsto u=1.74(1.27)$

$\\ \rm\longmapsto u=2.2m/s$

4 0

3 years ago

An object is traveling at 15 m/s and then after 5 seconds ends up traveling at 10 m/s. Calculate the speeds acceleration rate. W

SSSSS [86.1K]

Answer:

1) a = -1 m/s²

2) v = 12 m/s

Explanation:

Given,

The initial velocity of the object, u = 15 m/s

The final velocity of the object, v = 10 m/s

The time taken by the object to travel is, t = 5 s

Using the first equation of motion

a = (v - u) / t

Substituting the values

a = (10 - 15) / 5

= -1 m/s²

The negative sign indicates the body is decelerating

The acceleration of the object is, a = -1 m/s²

The speed of the object after 2 seconds

From the above equations of motion

v = 15 + (-1) 2

= 12 m/s

Hence, the speed of the object after 2 seconds is, v = 12 m/s

7 0

4 years ago

A small button placed on a horizontal rotating platform with diameter 0.520 m will revolve with the platform when it is brought

yawa3891 [41]

For the position of button we can use force balance as

Friction Force = Centripetal force

so here we will have

$\mu_s mg = m\omega^2 R$

here we know that

R = radius of circle where button is placed

$\omega = 2\pi f$

f = 35 rev/min

$f = \frac{35}{60} rev/s = 0.58 rev/s$

$\omega = 2\pi (0.58) = 3.66 rad/s$

now from above equation

$\mu_s(m)(9.81) = (3.66)^2(0.240)$

$\mu_s = 0.33$

so friction coefficient will be 0.33

5 0

4 years ago

How does water move from the surfaces of lakes, rivers, and the ocean directly back into the atmosphere?

Sergeeva-Olga [200]

Answer:

B. Evaporation

Explanation:

Because I am absolutely positive

Please give Brainlyest

4 0

3 years ago

Viewed at night from the high diving board at a swimming pool, the light from an underwater bulb forms a bright, 10-ft diameter

ycow [4]

Answer:

option A

Explanation:

given,

diameter of circle = 10 ft

refractive index of the water = n = 1.33

let the inclined surface of the cone makes an angle θ with vertical line then

$tan \theta = \dfrac{radius\ of\ circle}{verticle\ length}$

$h= \dfrac{radius}{tan\theta }$

we know,

$sin \theta = \dfrac{1}{n}$

$sin \theta = \dfrac{1}{1.33}$

$\theta =sin^{-1}(\dfrac{1}{1.33})$

from this θ = 48.75°

substitute this in eq ( 1 ) we have

$h= \dfrac{5}{tan 48.75}$

h = 4.38

h = 4.4 (approx.)

Hence, the correct answer is option A

3 0

3 years ago