D. Mechanical waves need to have a medium
Answer:
speed of the arrow as it leaves is 41.05 m/sec
Explanation:
We have given mass m = 0.285 kg
Average force F = 182 N
Distance traveled d = 1.32 m
We know that work done = force 
distance
Sp work done = 
Now according to work energy theorem work done will be equal to kinetic energy
So 
v = 41.05 m/sec
So speed of the arrow as it leaves is 41.05 m/sec
Solo estoy aquí por la libra, lo siento, no pude ayudar
It’s true. longer wavelength means a lower frequency, and a shorter wavelength means a higher frequency!
Answer:
Explanation:
Let the length of inclined plane be L .
work done by gravity on the block
= force x length of path
= mg sinθ x L , m is mass of the block , θ is inclination of path
This in converted into potential energy of compressed spring
1/2 k x² = mgL sin31 , k is force constant . x is compression
.5 x 3400 x .37² = 33 x9.8 x sin31 L
L = 1.4
Length of incline = 1.4 m .
