Answer:
The height of the building is 88.63 m.
Explanation:
Given;
initial component of vertical velocity, = 12 m/s sin 26° = 5.26 m/s
initial horizontal component of the velocity, = 12 m/s cos 26° =10.786 m/s
horizontal distance traveled by the rock, x = 40.4 m
time of flight is calculated as;
x = t
t = x /
t = 40.4 / 10.786
t = 3.75 s
Determine the final vertical velocity of the ball;
Determine the height of the rock;
Therefore, the height of the building is 88.63 m.
Answer:
The answer is B. heredity.
Explanation:
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Answer
given,
B = 2 T
time = 20 s
Radius = R = 400 mm
L= 300 mm
apply the formula for magnetic energy density
energy density = 1.59 x 10⁶ J/m³
Now , in the cylinder ,
Energy = energy density x volume
E = 1.59 x 10⁶ x π x r² x h
E = 1.59 x 10⁶ x π x 0.4² x 0.5
E = 4 x 10⁵ J
now, average rate of energy dissipated
rate of dissipation of energy = Energy/time
= 4 x 10⁵ /20
= 2 x 10⁴ W
the average rate at which energy is dissipated is 2 x 10⁴ W
The answer is going to be B
Answer:
18.24 seconds
Explanation:
First you convert the km/h to m/s, 70km/h=(175/9)m/s,85km/h=(425/18)m/s.
You know it took 10 seconds for the police to reach 85 km/h. Calculate the distance that the car is ahead of the police (175/9)*10=1750/9m. Then by divide 1750/9 with 425/18, you will get the value 8.24. Add the 10 seconds with the 8.24 you will get 18.24 sec which is the total time.