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aliina [53]
4 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]4 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

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Colonel John P. Stapp, USAF, participated in studying whether a jet pilot could survive emergency ejection. On March 19, 1954, h
PolarNik [594]

Answer:

(a) a = - 201.8 m/s²

(b) s = 197.77 m

Explanation:

(a)

The acceleration can be found by using 1st equation of motion:

Vf = Vi + at

a = (Vf - Vi)/t

where,

a = acceleration = ?

Vf = Final Velocity = 0 m/s (Since it is finally brought to rest)

Vi = Initial Velocity = (632 mi/h)(1609.34 m/ 1 mi)(1 h/ 3600 s) = 282.53 m/s

t = time = 1.4 s

Therefore,

a = (0 m/s - 282.53 m/s)/1.4 s

<u>a = - 201.8 m/s²</u>

<u></u>

(b)

For the distance traveled, we can use 2nd equation of motion:

s = Vi t + (0.5)at²

where,

s = distance traveled = ?

Therefore,

s = (282.53 m/s)(1.4 s) + (0.5)(- 201.8 m/s²)(1.4 s)²

s = 395.54 m - 197.77 m

<u>s = 197.77 m</u>

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Which unit represents a value that is one order of magnitude larger than a decimeter?
Mademuasel [1]

The unit represents a value that is one order of magnitude larger than a decimeter is a meter

<h3>Further explanation </h3>

Magnitude is something that can be measured or counted

The principal amount is the amount that has been determined based on the agreement of the scientists

Derivative magnitude is a quantity derived from the principal amount

There are 7 main quantities that have been determined based on international standards, namely:

  • 1. Length, meters (m)
  • 2. Time, second (s)
  • 3. Mass, kilograms (kg)
  • 4. Temperature, kelvin (K)
  • 5. Light intensity, candela (cd)
  • 6. Electric current, amperage (A)
  • 7. Amount of substance, mol (m)

The length of the principal is to indicate the distance between two points in a place

The symbol is usually expressed in l, length

Length measurements can be used by several measuring instruments such as ruler, caliper length, meter, screw micrometer

The main length unit consists of 7 units other than other units of length such as inches, miles, yards, feet:

  • Kilometers, km
  • Hectometer, hm
  • Dekameter, dam
  • Meters, m
  • Decimeter, dm
  • centimeters, cm
  • millimeters, mm

Each one unit descends then multiplied by 10, and if one unit increases then divided by 10

Conversion of other mass units:

mm millimeters = 10⁻³ m

km kilometers = 10³ m

µm micrometers (mcm) = 10µm

nm nanometers = 10⁻⁹ m

Gm gigameters = 10⁹ m

ρm picometers = 10⁻¹² m

An order of magnitude used base ten number.

If numbers differ by one order of magnitude, so the number is about 10 times different in quantity . If values differ by two orders of magnitude, they differ about 100.

The decimeter unit is located between the centimeter and meter.

Decimeter value = 10⁻¹m, centimeter = 10⁻² m, so that the unit represents a value that is one order of magnitude larger than a decimeter is meter

 

<h3>Learn more </h3>

book thickness in cm

brainly.com/question/8540796

The mass of A standard baseball

brainly.com/question/4576804

the quantity of 0.0075 meters expressed in centimeters

brainly.com/question/2867118

Keywords: order of magnitude, decimeter, unit

6 0
3 years ago
Read 2 more answers
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