Sound waves actually travel much faster in water than air, but words and the direction of the noise are distorted.
Explanation:
Make a table, listing the x and y coordinates of each square's center of gravity and its mass. Multiply the coordinates by the mass, add the results for each x and y, then divide by the total mass.
The x-coordinate of the center of gravity is 15/14 a.
The y-coordinate of the center of gravity is 47/42 a.
Answer:
1.5 hours
Explanation:
Using the equation t=d/v to solve for time:
t=75 miles ÷ 50 miles per hour = 1.5 hours
Because weight W = M g, the ratio of weights equals the ratio of masses.
(M_m g)/ (M_w g) = [ (p^2 Man )/ (2 K_man)] / [ (p^2 Woman )/ (2 K_woman)
but p's are equal, so
K_m/K_m = (M_w g)/(M_m g) = W_woman / W_man = 450/680 = 0.662
Answer:
W = 12.568rads
V = 1.8852m/s
Explanation:
Data:
r = 15cm = 0.15m
t = 10s
Revolutions = 20
Frequency (F) = number revolutions/ time take complete it
F = 20 / 10 = 2Hz
Angular velocity (w) = 2 * 3.142 * F
Note: 3.142 = value of pi
W = 2*3.142*2 = 12.568 rads
Linear velocity (v) = w*r
V = 12.568*0.15 = 1.8852m/s
