Answer:
Explanation:
The electric field that will balance the weight of the oil drop can be calculated using the following:
electric force, F = e E ( where, e is the charge of an electron and E is the electric field)
weight, W = 2.5 ×10⁻¹⁴ N
e E = W
Substitute the values:
Answer:
887 J
Explanation:
the specific heat of a material is defined as the amount of heat energy required to raise the temperature of the substance by 1 K of mass 1 kg. So, the specific heat of the aluminium, c = 887 J/kg K
mass of aluminium, m = 100 g = 0.1 kg
T1 = - 9° C
T2 = 1° C
ΔT = 1 + 9 = 10° C
The amount of heat required
H = m x c x ΔT
H = 0.1 x 887 x 10 = 887 J
Answer:
Because SI system has fundamental units of MKS System
Average speed = total distance / total time
= (81 + 88) / (2 + 2)
= 169/4
= 42.25 kilometers/hour
Let me know if you have any questions.
Answer:
<h2>17.1 N</h2>
Explanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question
3800 g = 3.8 kg
We have
force = 3.8 × 4.5
We have the final answer as
<h3>17.1 N</h3>
Hope this helps you
