Average Speed = 23.33 m/s
<u>Explanation:</u>
Given:
Diameter = 7 km
So, to find the distance, we need to multiply it by 10 as the race car circles 10 times round this 7 km track.
Distance = 7 × 10 = 70 Km or 70,000 m
Time = 50 mins
= 50 × 60 = 3000 s
Now, in order to find the average speed for 10 cycles, we use the formula:
So by substituting the above values in the given formula, we get:
Speed = 23.33 m/s
Answer:
Pressure at P point is given as
Explanation:
As we know by poiseuille's equation of viscous flow of liquid through cylindrical pipe
here we know that
L = 4 cm
r = 1 mm
Q = flow rate
now we have
Rollercoasters generate speed by converting gravitational potential energy into kinetic energy by taking the cart to the top of a large hill and letting it go. The conversion of a perfectly efficient system would be like so:
PE = KE
and using the formulas for potential and kinetic energy:
mgh = 1/2mv^2.
However, the efficiency of this system is 50%, meaning that the kinetic energy obtained from this conversion would appear as so:
PE=0.5 KE
mgh=0.5(1/2mv^2)
mgh=1/4mv^2.
The masses cancel out, leaving:
gh=1/4v^2
The goal is to achieve 65 m/s, and with Earth’s innate gravity of 9.806 m/s^2, we have:
gh=1/4v^2
(9.806)h=1/4(65)^2
h=107.71 meters
The height of the first hill must be 107.7 meters to generate a speed of 65 m/s with a conversion efficiency of 50%.
Hope this helps!
1. Over-hunting
2. A disappearance of a primary food source
<span>3. Drought</span>
Answer:Because if the shape gets changed it will move faster without to much weight
Explanation:
