Answer:
171 ft
Explanation:
The distance to be calculated is AB
AB = AC + BC
AC; Cos 60 = AC ÷ 135
AC = 135 cos 60 = 67.5 ft
BC; Cos 40 = BC ÷ 135
BC = 135 cos 40 = 103.416 ft
AB = 67.5 + 103.416 = 170.9159998210 ft
Distance between starting point to end point = 171 ft
Answer:
(a). H = 8.83 m
(b). Rising
Explanation:
Given,
- Initial velocity of the ball = u = 22.6 m/s
- Height of the crossbar = h = 3.05 m
- Distance of the crossbar from the initial position of the ball = r = 36.0 m
- Angle of projection =
- Initial horizontal velocity of the ball =
- Initial vertical velocity of the ball =
part (a)
In the horizontal direction,
Ball is moving with the constant initial velocity of
Let 't' be the time of the ball to reach at the crossbar of distance r.
At time 't', let 'y' be the vertical displacement attained by the ball.
From the equation of kinematics,
Total distance of the ball above the crossbar = H = y - h = 11.88 - 3.05 = 8.83 m
part (b)
At the maximum height, vertical velocity of the ball becomes zero,
Let h be the maximum height attained by the ball.
From the kinematics,
Maximum height attained by the ball with the given initial velocity is 13.92 m but at the crossbar it attains 11.88 m. Hence the ball will still rising approaching the crossbar.
Answer:
a) 3.242
b) 1291.178 KJ
c) 3.59 cents
Explanation:
a) First all the temperature units should be in Kelvin. -30°C + 273.15 = 243.15K and 45°C + 273.15 = 318.15K. Coefficient of performance for refrigerator is COP = TL/(TH-TL) where TL is Lower Temperature and TH is the Higher Temperature. COP = 243.15/(318.15-243.15) = 3.242
b) COP = Cooling Effect/Work Input. Cooling Effect (or Desired Output) is 4186 kJ.
So Work Input = Cooling Effect/COP = 4186KJ/3.242= 1291.178 KJ
c) 3.6 MJ (3600kJ) is for 10 cents, using ratio for cost: energy used
3.59 cents
It would be purple. That is why it is the outside of the rainbow:)
Answer:
Ok I’m not pretty sure but I think it’s C but look for more answers first before you put C because I don’t want you to get it wrong. :)
Explanation: