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3 years ago

A periodic wave has a fixed pattern that is repeated. What is one completion of the wave pattern called?

Physics

1 answer:

Kaylis [27]3 years ago

7 0

It is called cycle. Letter D

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Carbon-14 is used to determine the age of ancient objects. If a sample today contains 0.060 g of carbon-14, how much carbon-14 m

MakcuM [25]

Answer: 86.47 g of carbon-14 must have been present in the sample 11,430 years ago.

Explanation:

Half-life of sample of carbon -14= 5,730 days

$\lambda=\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{5,730 days}=0.00012 day^{-1}$

Let the sample present 11,430 years(t) ago = $N_o$

Sample left till today ,N= 0.060 g

$N=N_o\times e^{-\lambda t}$

$ln[N]=ln[N]_o-\lambda t$

$\log[0.060 g]=\log[N_o]-2.303\times 0.00012 day^{-1}\times 11,430 days$

$\log[N_o]=1.9369$

$N_o=86.47 g$

86.47 g of carbon-14 must have been present in the sample 11,430 years ago.

5 0

3 years ago

Read 2 more answers

Advantages and Disadvantages of a clinical thermometer

lidiya [134]

Answer:

Explanation:Advatages

1..Its takes precise reading accurate

2. it is moveable because of its small weight

3.It is easy to read and can be kept inside water

Disadvantages

1. It breaks easily because of its small size

2. If broken there can be risk of exposure to mercury chemicals.

4 0

4 years ago

What would cause the pressure in a sealed container of gas to increase?

Whitepunk [10]

<span>a. The temperature increases.</span>

3 0

4 years ago

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a s

baherus [9]

Given that,

Central maximum = 1 cm

Distance from the window shade to the wall =4 m

We know that,

The visible range of the sun light is 400 nm to 700 nm.

(a). We need to calculate the average wavelength

Using formula of average wavelength

$\lambda_{avg}=\dfrac{\lambda_{1}+\lambda_{2}}{2}$

Put the value into the formula

$\lambda_{avg}=\dfrac{400+700}{2}$

$\lambda_{avg}=550\ nm$

(b). We need to calculate the diameter of the pinhole

Using formula for diameter

$w=\dfrac{2.44\lambda L}{D}$

$D=\dfrac{2.44\lambda L}{w}$

Put the value into the formula

$D=\dfrac{2.44\times550\times10^{-9}\times4}{1\times10^{-2}}$

$D=0.537\ mm$

Hence, (a). The average wavelength 550 nm.

(b). The diameter of the pinhole is 0.537 mm.

7 0

4 years ago

A 950kg elevator is lifted 15m at 1.0m/s2. calculate the work is done on the elevator

blagie [28]

There it is fella tried on ma own consciousness

5 0

3 years ago