Answer:
Explanation:
F=ma where F is the force, m is the mass of object and a is acceleration
Initial mass is 13000 Kg
Final mass=1300-(66*7)=12538 Kg
where and are initial and final mass respectively, and are initial and final acceleration respectively
By substitution
Answer:
Gamma Rays
Explanation:
Because it has the most energetic radiation and could penetrate through six feet of concrete. It is so strong it can damage your dna.
So the question is asking for time.
Time= distance / speed
120/30
4
Therefore answer is d
Answer:
88.8 m/s= Speed of wave propagation in the required mode.(3 loops)
Explanation:
When there are 3 loops.
the total length = L = 3 λ /2
⇒ λ = 2 L / 3 = 2 ( 1.11 ) / 3 = 0.74 m
Velocity = v = f λ = (120)(0.74) = 88.8 m/s