Answer:
D
Explanation:
The gravity is pushing the water downward so Wayne could go down but the water is pushing Wayne to go up which would make him float.
Answer:
The number of turns in the solenoid is 1.95 x 10⁴.
Explanation:
given information:
the length of solenoid, L = 0.34 m
magnetic field, B = 6.5 T
current, I = 90 A
to find the number of turn in solenoid, we can start from the magnetic field equation,
B = μ₀nI, n = N/L
B = magnetic field (T)
μ₀ = permeability (4π × 10⁻⁷ T.m/A)
n = the number turn per unit length (turn/m)
I = current (A)
N = the number turn in solenoid
L = the length of solenoid
thus,
B = μ₀IN/L
N = B L/μ₀I
= (6.5) (0.34)/(4π × 10⁻⁷) (90)
= 1.95 x 10⁴ turn
Answer
given,
length of the track = 200 m
speed of runner 1 = 6.20 m/s
speed of the runner 2 = 5.5 m/s
distance covered by the fastest runner, d = 6.2 t
distance covered by the slow runner,d = 5.50 t + 200
time taken to overtake for the first time
6.2 t = 5.50 t + 200
0.7 t = 200
t = 285.7 s
distance covered from the starting point
d = 6.2 t
d = 6.2 x 285.7
d = 1771.43 m
for next overtaking time taken will be double
t' = 258.7 x 2 = 571.4 s
distance travel by the runner from the starting point
d' = 6.2 t'
d' = 6.2 x 571.4
d' = 3542.68 m
The smallest marble has the most kinetic energy therefore it would be the correct answer
34 I have too add this to submit