Answer:
t = 2 hours
Explanation:
Given that,
Distance of the town, d = 90 miles
Speed, v = 45 mph
We need to find the time to get there. The speed of an object is given by :
Where
t is time
So, the required time is 2 hours.
Joey is riding in an elevator which is accelerating upwards at 2.0 m/s2. The elevator weighs 300.0 kg, and Joey weighs 60.0 kg.
1 answer:
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Answer:
speed of the proton is 6.286 × m/s
Explanation:
given data
charge q= −60.0 nC
inner radius a = 20.0 cm
outer radius b = 24.0 cm
charge density ρ = −2.05 µC/m³
to find out
What is the speed of the proton
solution
we know that force on the proton due to this electric field is express as
F = q × E ...................1
here F is force and q is charge and E is electric filed so
if v be the speed of the proton in circular orbit than force will be
F = ....................2
from equation 1 and 2
q × E = .......................3
so
here total charge Q on shell is
Q = ρ × V
here ρ is density and V is volume
Q =
put here value
Q =
Q = 50.01 × C
and
total charge enclosed by Gaussian surface is
qin = q + Q
qin = −60 × C - 50.01 ×
C
qin = - 110.01 × C
and
from Gauss law
E ×4×π×b² =
E =
E =
E = 17189.06 N/C
so
from equation 3
q × E =
v =
v =
v = 6.286 × m/s
so speed of the proton is 6.286 × m/s
Answer:
Explanation:
Solution is in the picture attached
