1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tanzania [10]
3 years ago
8

Any one please give me the correct answer of this question??? I hope you can help me...

Physics
1 answer:
Phantasy [73]3 years ago
3 0

Answer:

no one ever amswers my questions

You might be interested in
The critical angle between a medium and air is 430. What is the speed of light in that medium?
vagabundo [1.1K]

Answer:

The speed of light is that medium is 281907786.2 m/s.

Explanation:

since the critical angle is Фc = 430, we know that the refractive index is given by:

n = 1/sin(Фc)

  = 1/sin(430)

  = 1.06

then if n is the refractive index of the medium and c is the speed of light, then the speed of light in the medium is given by:

v = c/n

  = (3×10^8)/(1.06)

  = 281907786.2 m/s

Therefore, the speed of light is that medium is 281907786.2 m/s.

8 0
2 years ago
A person observes a firework display for A safe distance of .750 km. Assuming that sound travels at 340 m/s in air what is the t
WINSTONCH [101]

Answer:

t = 2.2 s

Explanation:

Given that,

A person observes a firework display for A safe distance of 0.750 km.

d = 750 m

The speed of sound in air, v = 340 m/s

We need to find the between the person see and hear a firework explosion. let it is t. So, using the formula of speed.

v=\dfrac{d}{t}\\\\t=\dfrac{d}{v}\\\\t=\dfrac{750\ m}{340\ m/s}\\\\t=2.2\ s

So, the required time is 2.2 seconds.

3 0
2 years ago
The Burj Khalifa in Dubai is the world's tallest building. The structure is 828 m 828 m (2716.5 ft) and has more than 160 storie
Natasha_Volkova [10]

Answer:

h = height of the hotel room from the ground floor = 237.4m

Explanation:

Change in Potential Energy of tourist = ΔPE = PE2 – PE1 = mgh

PE1 is the potential energy of tourist at the ground floor

PE1 is the potential energy of tourist at the top (hotel room)

Given

PE1 = − 2.01 × 10⁵ J

PE2 = 0J

PE2 – PE1 = mgh

0 – (− 2.01 × 10⁵ J) = mgh

2.01 × 10⁵ J = 86.4×9.8×h

h = 2.01 × 10⁵/(86.4×9.8) = 237.4m

8 0
2 years ago
Can you help me??? This is too hard.
evablogger [386]

Answer:

Vacuum. A sound vacuum was created, i believe.

4 0
3 years ago
Explain, using the kinetic theory of matter, why liquids and solids are more denser than gases
AlekseyPX
Solid and liquids are much more denser than gas because their molecules are close to each other and with that the molecules of them can't move that freely unlike the gas molecules. Also, because of being near to each other the molecules of solid and liquids became heavy making them dense.
5 0
3 years ago
Other questions:
  • A light ray incident on a block of glass makes an incident angle of 50.0° with the normal to the surface. The refracted ray in t
    5·1 answer
  • When two waves meet and result in resonance, how is the resultant wave different from the original waves?
    8·1 answer
  • Which of the following statements correctly describes the position of the intake and exhaust valves during most of the power sta
    8·2 answers
  • An experiment is designed to test what color of light will activate a photoelectric cell the best. The photocell is set in a cir
    12·2 answers
  • Which part of the battery is electron enriched?
    12·2 answers
  • How long does it take for the moon to revolve once
    6·2 answers
  • 1
    10·1 answer
  • When a satellite orbits the earth?
    6·1 answer
  • I need help plz!!! Please help...
    7·1 answer
  • How much work is done lifting a 9.10-kg box straight up onto a shelf that is 1.80 m high
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!