<span>As the body rises up its gravitational potential energy increases but its kinetic energy decreases.
As a body falls its gravitational potential energy decreases but it's kinetic energy increases</span>
Refer to the diagram shown below
Given:
m = 2.8 kg, the mass of the bucket
a =3.1 m/s², the acceleration of the bucket
Therefore
W = 2.8*9.8 = 27.44 N, the weight of the bucket.
Let T = the tension in the rope.
From the free body diagram, the net force accelerating the bucket is
T - W = m*a
That is,
T = W + m*a
= 27.44 + 2.8*3.1 N
= 36.12 N
Answer: d. 36.1 N
Answer: The ice absorb 6671.1 kJ of thermal energy.
Explanation:
The conversions involved in this process are :


Now we have to calculate the enthalpy change.

where,
= enthalpy change = ?
m = mass of ice = 20.0 kg =
(1kg=1000g)
n = number of moles of ice= 
= enthalpy change for fusion = 6.01 KJ/mole = 6010 J/mole
Now put all the given values in the above expression, we get

(1 kJ = 1000 J)
Therefore, the enthalpy change is, 6671.1 kJ
Answer:
The distance between the slits is 3.55 μm
Explanation:
Given that,
Order number = 3
Wave length = 610 nm
Angle = 31°
We need to calculate the distance between the slits
Using formula of distance of slit


Where, n = order number
= wavelength
Put the value into the formula



Hence, The distance between the slits is 3.55 μm.