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
alexira [117]
3 years ago
11

If an earthquake wave having a wavelength of 13 km caused the ground to vibrate 10 times each minute, what is the speed of the w

ave?
1.2 km/s
2.2 km/s
220 m/s
22 m/s

If the amplitude in a sound wave is doubled, by what factor does the intensity of the wave increase?
2
1
8
4(my choice)
Physics
1 answer:
BARSIC [14]3 years ago
3 0

#1

Wavelength = 13 km

it vibrates 10 times each minute

so the frequency is defined by the number of vibrations per second

f = 10 per\: min

f = \frac{10}{60}

now the speed of wave is defined as

v = \lambda* f

v = 13* \frac{1}{6} = 2.2 km/s

<em>so here velocity of wave is 2.2 km/s</em>

#2

Intensity of wave is directly proportional to the square of its amplitude

so we can say

Intensity = k*(amplitude)^2

k = constant

so if amplitude is doubled then its intensity will be increased by its square

<em>so intensity is 4 times</em>


You might be interested in
Convertir:<br> A. 3Km a m<br> B. 250 ma Km<br> C. 1000Cm a m<br> D. 10000 mm a Cm
Katen [24]

Answer:

A. 3,000,000 m

B. 0.25 km

C. 10 m

D. 1,000 cm

Explanation:

no hablo español, así que solo ingrese esto en el traductor de G*ogle

A. One kilometer equals 1000 meters, so

3,000*1,000 = 3,000,000 m

B. One meter equals 0.001 kilometer, so

250*0.001 = 0.25 km

C. One centimeter equals 0.01 meter

1,000*0.01 = 10 m

D. One milimeter equals 0.1 centimer, so

10,000*0.1 = 1,000

4 0
3 years ago
a bus is moving at 22m/s [E] for 12s. Then the bus driver slows down at 1.2m/s2 [W] until the bus stops. Determine the total dis
KatRina [158]
The total displacement is equal to the total distance. For the east or E direction, the distance is determined using the equation:

d = vt = (22 m/s)(12 s) = 264 m

For the west or W direction, we use the equations:
a = (v - v₀)/t
d = v₀t + 0.5at²

Because the object slows down, the acceleration is negative. So,
-1.2 m/s² = (0 m/s - 22 m/s)/t
t = 18.33 seconds
d = (22 m/s)(18.33 s) + 0.5(-1.2 m/s²)(18.33 s)²
d = 201.67 m

Thus,
Total Displacement = 264 m +  201.67 m = 465.67 or  approximately 4.7×10² m.
7 0
3 years ago
A 6 cm long spring extends to 9 cm when a 1 kg load is suspended from it. What would be its length if a 2 kg load were suspended
Ganezh [65]
The answer is D that is the right question
8 0
3 years ago
A 0.5 kg cheeseburger is lobbed at a particularly unhappy customer with a force of 10 N. While it is being thrown, what is the a
Svetllana [295]
Lol i think someone would be fired from their job if they threw food
4 0
4 years ago
What does every magnet possess?
snow_lady [41]

All magnets possess a property called polarity--that is, a magnet's power of attraction is strongest at its opposite ends, usually called the north and south poles. The north and south poles attract each other, but north repels north and south repels south. All magnets attract iron.

8 0
3 years ago
Other questions:
  • A gardener pushes her 90 kg wheelbarrow in a straight line out of her garage and across the yard in 18 s. If her average velocit
    15·1 answer
  • Which nuclear emission has the greatest penetrating power
    13·1 answer
  • (b) Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a c
    12·2 answers
  • Which statement best describes longitudinal waves
    10·1 answer
  • Express in words AND mathematically the relationship between…<br> Period and frequency
    14·1 answer
  • A block slides forward 4.73 m while being pulled back by a 39.7 N force at 142° from the direction of motion. How much work does
    13·1 answer
  • This question looks so simple , but I don’t want to get it won’t could I get help .
    15·2 answers
  • Examine the following equation.
    12·1 answer
  • Trial.
    12·1 answer
  • What is the relationship between resistance and current.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!