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
adelina 88 [10]
3 years ago
14

How fast does sound travel? A. 1,115 feet per second B. 1,000 feet per second C. 2,000 feet per second D. 2,115 feet per second.

.
NEED HELP NOW
Physics
1 answer:
lys-0071 [83]3 years ago
6 0

Answer:

A

Explanation:

You might be interested in
Which vector shows the direction of the centripetal acceleration at this point
Mademuasel [1]

Answer:

It's B

Explanation:

6 0
3 years ago
A speaker emits sound waves in all directions, and at a distance of 28 m from it the intensity level is 73 db. What is the total
Oduvanchick [21]

Answer:

P=0.197 Watt

Explanation:

Given That

B=73dB

Io= 1 * 10^-12

I=Io * 10^{\frac{B}{10} } \\I=2 * 10^{-5} Wm^{-2}  \\A=4 * pi * r^{2}\\ A=9852.03 m^{2}\\ Power= I * A\\P= 0.197 Watt

6 0
3 years ago
Select the statement that best describes how the forces relate. (2 points)
Anarel [89]
"D. Magnetic and electrical forces are similar because they are both related to the interactions between charged particles" best describes how the forces relate.
4 0
3 years ago
Read 2 more answers
Consider a river flowing toward a lake at an average speed of 3 m/s at a rate of 550 m3/s at a location 58 m above the lake surf
Vladimir [108]

Answer:

1. 0.574 kJ/kg

2. 315.7 MW

Explanation:

1. The mechanical energy per unit mass of the river is given by:

E_{m} = E_{k} + E_{p}

E_{m} = \frac{1}{2}v^{2} + gh

Where:

Ek is the kinetic energy

Ep is the potential energy

v is the speed of the river = 3 m/s

g is the gravity = 9.81 m/s²

h is the height = 58 m

E_{m} = \frac{1}{2}(3 m/s)^{2} + 9.81 m/s^{2}*58 m = 0.574 kJ/Kg

Hence, the total mechanical energy of the river is 0.574 kJ/kg.

2. The power generation potential on the river is:

P = m(t)E_{m} = \rho*V(t)*E_{m} = 1000 kg/m^{3}*550 m^{3}/s*0.574 kJ/kg = 315.7 MW

Therefore, the power generation potential of the entire river is 315.7 MW.

I hope it helps you!

4 0
3 years ago
What happen when a.c is passed into the coil of dynamo?<br>​
ehidna [41]

Answer:

The dynamo produces Alternating Current output, so in theory yes, it should work in reverse if Alternating Current is input.

5 0
3 years ago
Other questions:
  • Baseball Digest is but one of several publications on the sport of baseball. True or False?
    14·2 answers
  • A Each time he does one pushup, Jose, who has a mass of 89kg, raises his center of mass by 25 cm. He completes an impressive set
    9·1 answer
  • If 1.8 1016 electrons enter a light bulb in 3 milliseconds, what is the magnitude of the electron current at that point in the c
    13·1 answer
  • A bike travels at 7.5 m/s along a straight road, whereas a car travels at 10.0 m/s along the same road and in the same direction
    15·1 answer
  • Which scientist invented a model of the atom that most closely resembles the modern electron cloud model
    9·1 answer
  • How many basic wave forms are there?<br><br> A.) 1<br> B.) 2<br> C.) 3<br> D.) 4
    8·1 answer
  • In a physics laboratory experiment, a coil with 250 turns enclosing an area of 14 cm2 is rotated in a time interval of 0.030 s f
    9·1 answer
  • A farmer lifts his hay bales into the top loft of his barn by walking his horse forward with a constant velocity of 1 ft/s. Dete
    15·1 answer
  • Which of the following scenerios fits all of the criteria for the two-source interference equations to be valid?
    5·1 answer
  • The microwave radiation left over from the big bang explosion of the universe has an average energy density of 4. 08 × 10–14 j/m
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!