Answer:
1029 Jkg⁻¹
Explanation:
= height dropped by the water falling = 105 m
= acceleration due to gravity = 9.8 ms⁻²
= mass of water
Using conservation of energy, the internal energy produced is same as the gravitational potential energy lost, hence
Internal energy = Gravitational potential energy
(a). If the temperature of a substance is increased the density of it will also increased. The temperature is directly proportional to the density because the molecular activity of the substance will be affected by the temperature
(b).The mass of the substance doesn't at all. Because the amount of matter inside the substance cannot be affected by the temperature except that its water
Answer:
2.06 m/s
Explanation:
From the law of conservation of linear momentum, the sum of momentum before and after collision are equal. Considering this case where we have frictionless surface, no momentum is lost in the process.
Momentum before collision
Momentum is given by p=mv where m and v represent mass. The initial sum of momentum will be 9v+(27*0.5)=9v+13.5
Momentum after collision
The momentum after collision will be given by (9+27)*0.9=32.4
Relating the two then 9v+13.5=32.4
9v=18.5
V=2.055555555555555555555555555555555555555 m/s
Rounded off, v is approximately 2.06 m/s
Answer:
Explanation:
The answer is in the picture
Answer:
10 cm/sec
Explanation:
using formula velocity = frequency * wave length
where: f=1/T
1/1=1
so frequency will be 1HZ ( due to 1 oscillation in 1 sec)
wave length will be 10 cm because while sloshing cup hold (1/2) half full length.
velocity = 1*10 = 10cm/sec.
velocity = 10 cm/sec
