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
aliina [53]
3 years ago
13

A woman is standing in the ocean, and she notices that after a wave crest passes by, five more crests pass in a time of 29.4 s.

The distance between two successive crests is 31.4 m. What is the wave's (a) period, (b) frequency, (c) wavelength, and (d) speed
Physics
1 answer:
baherus [9]3 years ago
3 0

Answer:

(a) 5.88 s

(b) 0.17 Hz

(c) 31.4 m

(d) 5.338 m/s

Explanation:

From the question,

(a) Period = time between successive crest = t/n............ Equation 1

where t = time, n = number of wave crest

Given: t = 29.4, n = 5

therefore,

Period (T) = 29.4/5 = 5.88 s.

(b) Frequency = 1/period

Frequency = 1/5.88

Frequency = 0.17 Hz.

(c) wavelength = distance between two successive crest = 31.4 m

(d)  using,

v = λf............... Equation 2

Where v = speed, f = frequency, λ = wavelength

given: f = 0.17 Hz, λ = 31.4 m

Substitute into equation 2

v = 0.17(31.4)

v = 5.338 m/s

You might be interested in
3. In some countries AC outlets near bathtubs are restricted to a maximum of 25 V to minimize the chance of dangerous shocks whi
Ierofanga [76]

Answer:

The answer is below

Explanation:

The average resistivity of the human body (apart from surface resistance of the skin) is about 5.0 Ωm. The conducting path between the right and left hands can be approximated as cylinder 1.6 m long and 0.10 m in diameter. The skin resistance can be made negligible by soaking the hands in salt water. (a) What is the resistance between the hands if the skin resistance is negligible? (b) if skin resistance is negligible, what potential difference between the hands is needed for lethal shock current 100 mA?

Solution:

The resistance (R) of a material is given by the formula:

R = ρL / A

where L is the length of the conductor, ρ is resistivity and A is the cross sectional area.

a) R = ρL / A

ρ = 5.0 Ωm, L = 1.6 m, A = π(diameter²) / 4 = π(0.1²)/4 = 0.00785 m²

R = 5(1.6) / 0.00785 = 1018.6 ohm

b) To produce 100 mA, we need to use ohms law:

I = 100 mA = 0.1 A, R = 1018.6 ohm

V = IR = 0.1(1018.6)

V = 101.86 V

7 0
2 years ago
would the phases of the moon be affected if the moon didn't make one rotation for each revolution of earth?
Aleks [24]

As long as the moon orbits the Earth in the same way, the phases will be the same.

4 0
3 years ago
When light waves hit ice, most of them bounce off and radiate back into space. Because of this, ice is best described as which k
viktelen [127]
A. Reflective
The light reflects off the ice

Hope this helped
8 0
3 years ago
Read 2 more answers
How does increasing the distance affect the electric field strength for a given charge?
Minchanka [31]
V = Ed
E = v/d
so electric field strength and distance are inversely propotional. if we increase the distance electric field will decrease. if we decrease the distance electric field will increase.
3 0
3 years ago
Can an electric field exist in a vacuum?
statuscvo [17]
NO it can’t because that’s illegal and that’s such a hate crime so no it can’t exist in a vaccuum
3 0
3 years ago
Other questions:
  • a bullet is dropped from the same height when another bullet is fired horizontally they will hit the ground
    12·1 answer
  • A device called an insolation meter is used to measure the intensity of sunlight. It has an area of 100 cm2 and registers 6.50 W
    15·1 answer
  • A conglomerate is a rock that forms as a result of _____. . . Choices:Intense heat and pressure. Compaction and cementation. Rap
    8·2 answers
  • A machine has a mechanical advantage of 4.5. What force is put out by the machine if the force applied to the machine is 800 N?
    6·1 answer
  • Which of the following statements about the problem of object recognition is false?
    5·1 answer
  • An objects mechanical energy never changes it simply changes between
    9·1 answer
  • 12
    14·1 answer
  • A satellite orbits earth with a mean altitude of 361 km. If the orbit is circular, what are the satellite's time period and spee
    5·1 answer
  • The graph depicts the velocity and times of Elan and Anna during a race.
    13·2 answers
  • Find an equation in x and y for the line tangent to the curve ()=4,()=cos() at the point where =4.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!