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Alexus [3.1K]
3 years ago
5

Use what you know about reflection and absorption of light to complete the sentence.

Physics
2 answers:
Ivahew [28]3 years ago
7 0

2, 2, 3

just took the test

Blababa [14]3 years ago
3 0

A red ladybug appears red in white light, red in red light, and black in blue light. Those would be the proper selections you'd need.

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A baseball pitcher throws a ball at 90.0 mi/h in the horizontal direction. How far does the ball fall vertically by the time it
Lisa [10]

Answer:

Vertical distance=  3.3803ft

Explanation:

First with the speed of the ball and the distance traveled horizontally we can determine the flight time to reach the plate:

Velocity= (90 mi/h) × (1 mile/5280ft) = 475200ft/h

Distance= Velocity × time⇒ time= 60.5ft / (475200ft/h) = 0.00012731h

time=  0.00012731h × (3600s/h)= 0.458316s

With this time we can determine the distance traveled vertically taking into account that its initial vertical velocity is zero and its acceleration is that of gravity, 9.81m/s²:

Vertical distance= (1/2) × 9.81 (m/s²) × (0.458316s)²=1.0303m

Vertical distance= 1.0303m × (1ft/0.3048m) = 3.3803ft

This is the vertical distance traveled by the ball from the time it is thrown by the pitcher until it reaches the plate, regardless of air resistance.

3 0
3 years ago
Which type of wave does the illustration depict?
Naddika [18.5K]
A transverse wave. A wave is a disturbance that transmits energy from one place to another by the particles of the medium.
4 0
3 years ago
Read 2 more answers
A force of 3,200 kg x m/s^2 (Newton’s) acts on a truck giving it an acceleration of 2 m/s^2. What is the mass of the truck ?
Ivan

Answer:

According to newton's second law of motionF=ma Data:-F=3200kgm/sec² or N ,a=2m/sec² ,m=? solution :-F=ma here we have to find m so m=F/a ,m=3200/2=1600kg

3 0
4 years ago
Yall think aliens real? for me no, because people been trying to search for them through telescopes and stuff for years. but sti
Vsevolod [243]

Answer:

Personally I don't believe aliens exist maybe they do who knows but i don't think so.

Explanation:

7 0
3 years ago
Read 2 more answers
What is the maximum kinetic energy of ejected electrons when photons of wavelength 300 nm hit a metal that has a work function o
Sonja [21]

Explanation:

Given that,

Wavelength of the photon, \lambda=300\ nm=3\times 10^{-7}\ m

Work function of the metal, \phi=1.13\ eV=1.81\times 10^{-19}\ J

We need to find the maximum kinetic energy of the ejected electrons. It can be calculated using Einstein's photoelectric equation as :

hf=E_k+\phi

E_k=hf-\phi

E_k=h\dfrac{c}{\lambda}-\phi

E_k=6.63\times 10^{-34}\times \dfrac{3\times 10^8}{3\times 10^{-7}}-1.81\times 10^{-19}

E_k=4.82\times 10^{-19}\ J

E_k=3.01\ eV

or

E_k=3\ eV

So, the maximum kinetic energy of the ejected electrons is 3 ev. Hence, this is the required solution.          

3 0
3 years ago
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