FREQUENCY is the number of complete waves that pass a given point in a certain amount of time.
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Answer:
u= 200 m/s
Explanation:
Given that
Mass of bullet ,m= 50 gm
Assume that mass of block ,M= 1.2 kg
Lets take speed of the bullet before collision = u m/s
The speed of the system after collision ,v= 8 m/s
There is no any external force ,that is why linear momentum of the system will be conserve.
Linear momentum ,P = mass x velocity
m u = (M+m)v
0.05 x u = (1.2 + 0.05 ) x 8
u= 200 m/s
Therefore the speed of the bullet just before the collision is 200 m/s.
Answer:
moving away
Explanation:
They are moving AWAY from earth making the wavelengths longer than what was emitted....this is called 'Red Shift'.... longer waves is a shift toward the RED end of the spectrum .. (ROY G BIV)
Answer:
2.6 m/s
Explanation:
mass of Jerome (Mj) = 102 kg
mass of Micheal (Mm) = 98 kg
mass of each cart (Mc) = 14 kg
recoil speed of Jerone and Micheal after push (Vi) = ?
mass of Suzie (Ms) = 44 kg
Suzie's speed after push (Vs) = 9.6 m/s
From the conservation of momentum, initial momentum = final momentum
Since they all are initially at rest the initial momentum is 0 and hence the final momentum is also 0.
Therefore for the final momentum we have
(Mj + Mm + Mc) Vi - (Ms + Mc) Vs = 0 ( the negative sign is because they move in opposite directions)
((102 + 98 + 14) x Vi ) - ((44 + 14) x 9.6) = 0
(214 x Vi) - (58 x 9.6) = 0
214 Vi = 556.8
Vi = 556.8 / 214 = 2.6 m/s
Malleability is a useful property because it allows many products to be made in manufacturing.