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4 years ago

A spectrograph is used to:

Physics

2 answers:

tester [92]4 years ago

8 0

Answer:

the answer is D because it gets the spectrum of light

bija089 [108]4 years ago

5 0

The answer is B: analyze infrared and ultraviolet rays

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Give a turn signal for at least the last __________ feet before you make your turn to let other drivers know what you are going

kotegsom [21]

Give a turn signal for at least the last 100 feet before you make your turn to let other drivers know what you are going to do.
Making turns, turning a corner may seem to be a simple operation, however many accidents or traffic crashes are caused by drivers who do not turn correctly.

7 0

3 years ago

A 50 kg person steps off a diving platform that is 10 meters above the water below (Olympic height). With what speed do they hit

Nookie1986 [14]

Answer:

14 m/s

Explanation:

The following data were obtained from the question:

Mass = 50 kg

Initial velocity (u) = 0 m/s

Height (h) = 10 m

Acceleration due to gravity (g) = 9.8 m/s²

Final velocity (v) =?

The velocity (v) with which the person hit the water can be obtained as shown below:

v² = u² + 2gh

v² = 0² + (2 × 9.8 × 10)

v² = 0 + 196

v² = 196

Take the square root of both side

v = √196

v = 14 m/s

Therefore, he will hit the water with a speed of 14 m/s

5 0

3 years ago

Which statement does not describe the X Games?

nikdorinn [45]

the answer Is C. ,, thank you :)

5 0

3 years ago

. Calculate the work done by an elevator as it lifts 12 occupants up 21 floors (76.8 meters) at a constant speed. The average ma

ratelena [41]

Answer:

W = 4832

Explanation:

Given:

Force = 62.8 Kg

Distance = 76.8 m

Find :

work done = ?

Formula :

W = Fd

Solution:

W = Fd

W =(62.8 kg)(76.8 m)

= 4832 J

6 0

3 years ago

If mass and velocity are unknown when using de Broglie's wavelength formula, what alternative value must we have to successfully

mojhsa [17]

Answer:

The particle momentum, p

Explanation:

A particle's de Broglie's wavelength is an indication of the scale in length where the particle's wave-like properties are important. The symbol of de Broglie wavelength is λ or $\lambda _{dB}$ given as follows;

The de Broglie's wavelength formula is given as follows;

$\lambda = \dfrac{h}{m \cdot v} = \dfrac{h}{p}$

Where;

λ = The wavelength of the particle in meters

v = The velocity of the particle in meters/seconds

m = The mass of the particle in kilograms

p = The momentum of the particle

h = Planck's constant = 6.626 × 10⁻³⁴ J/Hz

Therefore, the alternative value that we must have to successfully determine the wavelength if the mass and velocity are unknown, is the momentum, p of the particle.

5 0

3 years ago