<u>Answer:</u>
<em>When red light enters the lens its wavelength decreases but its frequency remains the same.
</em>
<u>Explanation:</u>
Lens is made of glass which is a <em>denser medium</em> when compared with air. Thus light will undergo refraction and bend toward the normal. On entering a denser medium from rarer medium the speed of light decreases.
<em>Speed, frequency and wavelength of an electromagnetic wave</em> are related according to the equation.
<em> v=ϑλ
</em>
Where is <em>v is the frequency, λ is the wavelength and v is the speed of the em wave.
</em>
On entering the lens the wavelength of the red light as well as speed decreases but the<em> frequency remains the same.
</em>
<span>You do not require a force to keep something moving. You only require a force to get it moving. Or to stop it moving. In your everyday experiences, something you get moving seems to come to a stop after you stop pushing it. It is because there are forces (friction) that make it stop. Without those forces, the object would just keep moving. So this would mean the answer would be True.</span>
W=mg
m = W/g = 390N/ 9.8 m/s^2 = 39.8 kg
some people round g to 10 m/s^2 and this will give answer of 39 kg, which is wrong
Question: Initially, the car travels along a straight road with a speed of 35 m/s. If the brakes are applied and the speed of the car is reduced to 13 m/s in 17 s, determine the constant deceleration of the car.
Answer:
1.29 m/s²
Explanation:
From the question,
a = (v-u)/t............................ Equation 1
Where a = deceleration of the car, v = final velocity of the car, u = initial velocity of the car, t = time.
Given: v = 13 m/s, u = 35 m/s, t = 17 s.
a = (13-35)/17
a = -22/17
a = -1.29 m/s²
Hence the deceleration of the car is 1.29 m/s²
The type
of composition that igneous rocks have that contains mostly plagioclase
feldspar and about 30 percent dark silicate minerals would be andesitic. I am hoping that this
answer has satisfied your query about and it will be able to help you.
