Arrow 1 is dropped straight down at while Arrow 2 is fired horizontally with an initial speed of 20 m/s. Both are initially at a height of 45 meters above the ground. 1. Which arrow (ball) will hit the ground first? Why? Predict:
Arrow 1
EXAMPLE – Horizontal Projectiles
00
45 meters
Actual:
Arrow 2
20 m/s
vf v0 at
xx vt1at2
2
2. What do you know about the horizontal direction? The vertical direction? How does that help simplify the equations above?
3. How long will it take arrow 1 to strike the ground?
4. How long will it take for arrow 2 to strike the ground? Look familiar?? Why?
5. What is the velocity of arrow 1 just as it hits the ground?
6. What is the resultant velocity of arrow 2 just as it hits the ground?
7. What will be the horizontal distance traveled by arrow 2?

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.

i think the answer is tomato juice? not entirely sure though