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nirvana33 [79]
3 years ago
14

On a stormy night, a lighthouse emits a light that must travel through air, rain, and fog. As the light travels through these di

fferent media, what can be said about the light wave?
Select one:
a. Its wavelength remains constant.
b. Its speed remains constant.
c. Its speed is unaffected by the different mediums.
d. Its speed in air, rain, and fog is different. ​
Physics
2 answers:
klio [65]3 years ago
7 0

Answer:

CAN U GIVE ME A HOYAH

Explanation:

vlada-n [284]3 years ago
5 0

Answer:

HOOOOOOOYAAAAHHHHH

Explanation:

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How long will it take a 2190 W motor to lift a 1.47 x 104 g box, 6.34 x 104 mm vertically.​
Rasek [7]

Answer:

t = 4.17 [s]

Explanation:

We know that work is defined as the product of force by distance.

W = F*d

where:

F = force [N] (units of Newtons)

d = distance = 6.34 x 10⁴ [mm] = 63.4 [m]

In order to find the force, we must determine the weight of the box, the weight can be determined by means of the product of mass by gravitational acceleration.

w = m*g

where:

m = mass = 1.47 x 10⁴ [g] = 14.7 [kg]

g = gravity acceleration = 9.81 [m/s²]

w = 14.7*9.81

w = 144.2 [N]

Therefore the work can be calculated.

W = w*d

W = 144.2*63.4

W = 9142.72 [J] (units of Joules)

Power is now defined in physics as the relationship of work at a given time

P = W/t

where:

P = power = 2190 [W]

t = time [s]

Now clearing t, we have.

t = W/P

t = 9142.72/2190

t = 4.17 [s]

6 0
3 years ago
A train starts at v=10m/s and accelerates at 1m/s2 for 5s. Its final speed is *
ad-work [718]

Answer:

D) 15 m/s

Explanation:

v = u + at

v = 10 m/s + 1 m/s²(5 s)

v = 15 m/s

3 0
2 years ago
In the formula 4h²o how many total hydrogen atoms are there
Helen [10]
There are 8 hydrogen atoms
6 0
3 years ago
Una banda transportadora se utiliza para cargar canastos en un avión de carga, si µs = 0.5. ¿Cuál es el ángulo máximo de elevaci
Sonja [21]
No se creo es 45.7 de nada
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3 years ago
The abbreviation ucs stands for
LenaWriter [7]
It stands for Unified Computing System

I hope I helped :3
3 0
3 years ago
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