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
iragen [17]
3 years ago
5

An echo is heard from a building 0.4 s after you shout "hello." How many feet away is

Physics
1 answer:
UNO [17]3 years ago
6 0

Answer:

Circular motion: find period, find radius, find velocity, find centripetal acceleration 27 V= T a =vºlr=rw

Explanation:

You might be interested in
Which statement best describes the characteristics of white light? A. White light is composed of a spectrum of many different co
kodGreya [7K]
A white light is, by definition, apparently colorless light, for example ordinary daylight. It contains all the wavelengths of the visible spectrum at equal intensity.

so A.
6 0
3 years ago
Fault block mountains form when large blocks of crust are and tilted along normal faults
Katarina [22]
Fault block mountains form when large blocks of crust are uplifted and tilted along normal faults. The uplifted blocks are called block mountains. They are formed by the movement of large crustal blocks<span> when forces in the Earth's crust pull it apart. Some parts of the Earth are pushed upward and others collapse down.</span>
6 0
3 years ago
alculate the kinetic energies of (a) a 2.00×103-kg automobile moving at 100.0 km/h; (b) an 80.0-kg runner sprinting at 10.0 m/s;
zzz [600]

Answer:

(a) 7.72×10⁵ J

(b) 4000 J

(c) 1.82×10⁻¹⁶ J

Explanation:

Kinetic Energy: This can be defined energy of a body due to its motion. The expression for kinetic energy is given as,

Ek = 1/2mv²................... Equation 1

Where Ek = Kinetic energy, m = mass, v = velocity

(a)

For a moving automobile,

Ek = 1/2mv².

Given: m = 2.0×10³ kg, v = 100 km/h = 100(1000/3600) m/s = 27.78 m/s

Substitute into equation 1

Ek = 1/2(2.0×10³)(27.78²)

Ek = 7.72×10⁵ J

(b)

For a sprinting runner,

Given: m = 80 kg, v = 10 m/s

Substitute into equation 1 above,

Ek = 1/2(80)(10²)

Ek = 40(100)

Ek = 4000 J

(c)

For a moving electron,

Given: m = 9.10×10⁻³¹ kg, v = 2.0×10⁷ m/s

Substitute into equation 1 above,

Ek = 1/2(9.10×10⁻³¹)(2.0×10⁷)²

Ek = 1.82×10⁻¹⁶ J

8 0
3 years ago
In a series circuit, when batteries are added to the circuit the voltage will _____ and the current will _____.
Eva8 [605]

Answer: voltage, explode is the answers

Explanation:

Bc of the device for each  server

5 0
3 years ago
Example of optical object​
Alik [6]

Answer:

Telescope,cameras

Hope it helped

5 0
3 years ago
Read 2 more answers
Other questions:
  • Ball of mass 200g is moving with a speed of 17m/s. What is its deBroglie wavelength?
    12·2 answers
  • Consider that 168.0 J of work is done on a system and 305.6 J of heat is extracted from the system. In the sense of the first la
    13·1 answer
  • Finding the work done in pulling a stranded climber to safety. In an unfortunate accident, a rock climber finds herself stuck 17
    9·1 answer
  • A rock is thrown at an angle of 35.0° to the horizontal with a speed of 11.5 m/s. how far does it travel?​
    9·1 answer
  • 17
    13·1 answer
  • At a playground a student runs at a speed of 5 m/s and jump onto a circular disk of radius 3/2 m that is free to rotate around a
    9·1 answer
  • A turntable, with a mass of 1.5 kg and diameter of 20 cm, rotates at 70 rpm on frictionless bearings. Two 540 g blocks fall from
    7·1 answer
  • What is science notation
    7·2 answers
  • 3. A ball of mass 2.0 kg is attached to a vertical spring. The spring constant is 196 N/m. What is the period if it were to be i
    14·1 answer
  • A car traveling south is 200 kilometers from its starting point after 2 hours. What is the average velocity of the car?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!