Answer:
Explanation:


= 250 moles.
N = n×6.02×
= 1.505×
Total charge = (1.505×
) × (1.6×
)
= 2.4×
C.
D:the electrons from being attracted to the grid instead of the anode
Answer:
the expected distance is 4.32 m
Explanation:
given data
half life time = 1.8 ×
s
speed = 0.8 c = 0.8 × 3 ×
to find out
expected distance over
solution
we know c is speed of light in air is 3 ×
m/s
we calculate expected distance by given formula that is
expected distance = half life time × speed .........1
put here all these value
expected distance = half life time × speed
expected distance = 1.8 ×
× 0.8 × 3 ×
expected distance = 4.32
so the expected distance is 4.32 m
Answer:

Explanation:
(a) Free-body diagram attached.
(b) The stone attached with the string experiences both centripetal (towards the center) and centrifugal (away from the center) forces. The tension of the string counters the centrifugal force until it breaks.
We know that,
Centrifugal force = 
where,
= mass of the stone
= velocity of the stone
= length of the string
To find the maximum speed attained by the stone without the string breaking, we must equate:

or, 
Answer:
326.25 kWh
Explanation:
Efficiency of a machine is defined as the ratio of useful energy to that of the energy consumed by the machine.
Here, efficiency is given as 87% and the energy consumed by the computer is 375 kWh.
Efficiency, 
Plug in the values of
and 375 kWh for energy consumed. Solve for useful energy. This gives,
Efficiency, 
Therefore, the useful energy provided by the computer is 326.25 kWh.