<span>The Adirondack Mountains, Taconic Mountains, and the Hudson Highlands have the most resistant bedrock.</span>
Answer:
284 m
Explanation:
According to engineeringtoolbox(dot)com the speed of compressive sound in concrete is 3700 m/s
The speed of sound in standard air is 343 m/s
If t is the time in seconds of sound travel through the concrete and d is the distance
d = 3700t
d = 343(t + 0.75)
3700t = 343t + 257
3,357t = 257
t = 0.07663 s
d = 3700(0.07663) = 284 m
d = 343(0.07663 + 0.75) = 284 m
Answer:
159 N
Explanation:
The force of friction, Fr is a product of coefficient of feiction and the normal force. Therefore, Fr=uN where N is the normal force and u is coefficient of friction. Here, we have two coefficients of friction but since it is sliding, then we use coefficient of kinetic energy. Substituting 0.25 for u and 636 N for N then
Fr=0.25*636=159 N
Therefore, the force of friction is equivalent to 159 N
P=E/t
check physic Formula ..
answers is true