Answer:
the change in speed of the sled after 3.0 s is 60 m/s.
Explanation:
Given;
constant acceleration of the sled, a = 20 m/s²
change in time of motion, dt = 3.0 s
The change in speed of the sled after 3.0 s is calculated as;
Therefore, the change in speed of the sled after 3.0 s is 60 m/s.
The distance of separation between the lenses is determined as 12 cm.
<h3>
Distance of image formed by the first lens</h3>
The distance of the image formed by the first lens is calculated as follows;
1/d₁ = 1/f - 1/di₀
1/di₁ = 1/4 - 1/12
1/di₁ = 2/12
1/di₁ = 1/6
di₁ = 6 cm
<h3>Find the final position of the image</h3>
Use magnification formula as shown below;
M = (di₁di₂)/(d₀₁d₀₂)
1 = (di₁di₂)/(d₀₁d₀₂)
di₂ = (d₀₁d₀₂)/(di₁)
di₂ = (12 x d₀₂)/(6)
di₂ = 2d₀₂
1/f = 1/ d₀₂ + 1/di₂
1/f = 1/ d₀₂ + 1/2d₀₂
1/f = 1.5/d₀₂
d₀₂ = 1.5f
d₀₂ = 1.5(4 cm) = 6 cm
<h3>Distance between the two converging lens</h3>
D = di₁ + d₀₂
D = 6 cm + 6 cm
D = 12 cm
Thus, the distance of separation between the lenses is determined as 12 cm.
Learn more about distance between lens here: brainly.com/question/12993552
#SPJ1
Daniel will earn $2.20 more a week because his pay increase will increase his pay from $8 to $8.40
William Gilbert is known as the father of electricity.
Answer:
B) 2.7W
Explanation:
Converting Cal to Joule
1 cal = 4.186J
14 kcal = 14 x 1000 x 4.186
= 58604 J
Converting hour to seconds
6 hours = 6 x 60 x 60 seconds
= 21600 seconds
Power is the time rate of doing work.
Power = Work/Time
P = (58604) / (21600)
P = 2.7W
