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Pie
3 years ago
5

Explain the procedures used and data recorded to identify a crystalline mineral based on its properties.

Physics
2 answers:
Kay [80]3 years ago
4 0

Answer:

Observing its shape and hardness

Explanation:

nikdorinn [45]3 years ago
3 0

Answer:

By examining its external shape, color, hardness, etc.

Explanation:

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A car engine changes chemical potential energy into the what energy so the car can move
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It transforms it to mechanical
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A cruise ship made a trip to Guam and back. The trip there took 12 hours and the trip
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15 because i did the math, had this assignment, and also watch a video
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3 years ago
A radio wave has a frequency of 4.40 × 108 hz. what is the energy (in j) of one photon of this radiation? enter your answer in s
LiRa [457]
The energy of a single photon is given by
E=hf
where 
h=6.6 \cdot 10^{-34} Js is the Planck constant
f is the frequency of the wave (of the photon)

In our problem, the radio wave has a frequency of f=4.40 \cdot 10^8 Hz, so if we put this value into the previous formula, we can find the energy of a single photon of this electromagnetic wave:
E=hf=(6.6 \cdot 10^{-34} Js)(4.40 \cdot 10^8 Hz)=2.9 \cdot 10^{-25} J
7 0
3 years ago
A lab technician uses laser light with a wavelength of 650 nmnm to test a diffraction grating. When the grating is 42.0 cmcm fro
Bingel [31]

Answer:

221 lines per millimetre

Explanation:

We know that for a diffraction grating, dsinθ =mλ where d = spacing between grating, θ = angle to maximum, m = order of maximum and λ = wavelength of light.

Since the grating is 42.0 cm from the screen and its first order maximum (m = 1) is at 6.09 cm from the center of the pattern,

tanθ = 6.09 cm/42.0 cm = 0.145

From trig ratios, cot²θ + 1 = cosec²θ

cosecθ = √((1/tanθ)² + 1) = √((1/0.145)² + 1) = √48.562 = 6.969

sinθ = 1/cosecθ = 1/6.969 = 0.1435

Also, sinθ = mλ/d at the first-order maximum, m = 1. So

sinθ = (1)λ/d = λ/d

Equating both expressions we have  

0.1435 = λ/d

d = λ/0.1435

Now, λ = 650 nm = 650 × 10⁻⁹ m

d = 650 × 10⁻⁹ m/0.1435

d = 4529.62 × 10⁻⁹ m per line

d = 4.52962 × 10⁻⁶ m per line

d = 0.00452962 × 10⁻³ m per line

d = 0.00452962 mm per line

Since d = width of grating/number of lines of grating

Then number of lines per millimetre = 1/grating spacing

= 1/0.00452962

= 220.77 lines per millimetre

≅ 221 lines per millimetre since we can only have a whole number of lines.

6 0
3 years ago
Why is there an attraction between the two ions in this chemical bond?
kompoz [17]

Answer:

One atom will give electrons to another atom to fill its shell, this is an ionic bond. The atom giving away electrons becomes positive and the one recieving electrons becomes negative.

Explanation:

4 0
3 years ago
Read 2 more answers
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