total time = ball travel time + sound travel time
2.40 = Tball + 18.0 m / (340 m/s)
Tball = 2.35 s
V = d/t = 18.0 / 2.35 = 7.67 m/s
Answer:
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<span>11.25 kg of sand.
The coefficient of static friction tells you what fraction of the normal force is needed to start the object moving. Since the block is on a horizontal surface, the normal force is the same as the mass of the block. Therefore
M = 28 * 0.450 = 12.60
So once the mass hanging off the cord reaches 12.60 kg, the block will start to move. And since the bucket masses 1.35 kg, you need to subtract the mass of the bucket from the total mass needed, giving
M = 12.60 - 1.35 = 11.25</span>
Answer:
Explanation:
The mass of the deuteron = mass of the proton + mass of the neutron + mass equivalent of the energy of 2.2 Mev evolved.
I amu = 931 Mev
2.2 Mev = 2.2 / 931 amu
= ( 2.2 / 931 )x 1.6726 x 10⁻²⁷
= .00395 x 10⁻²⁷
The mass of the deuteron =( 1.6726 + 1.6749 + .00395)x 10⁻²⁷ kg
= 3.35145 x 10⁻²⁷ kg
b ) Momentum of gamma ray
= h / λ ( h is plank's constant and λ is wavelength of gamma ray )
= hυ / υλ ( υ is frequency of gamma ray )
= E / c ( E is energy of photon and c is velocity o light )
= 2.2 x 10⁶ x 1.6 x 10⁻¹⁹ J / 3 x 10⁸
= 1.173 x 10⁻²¹ Kg m /s
This will be the momentum of deuteron also
Kinetic energy
= p² / 2m ( p is momentum and m is mass of deuteron )
= ( 1.173 x 10⁻²¹ )² / ( 2 x 3.35145 x 10⁻²⁷)
= 1.376 x ⁻¹⁵ J
Energy of gamma ray
= 2.2 x 10⁶ x 1.6 x 10⁻¹⁹ J
= 3.52 x 10⁻¹³ J
So kinetic energy of deuteron is smaller than energy of gamma ray photon .