Physics, 23.07.2019 07:00 harleycochran2ovyt3n

Adistance-time graph indicates that an object travels 2 m in 2 s and then travels another 80 m during the next 40 s. what is the average speed of the object?

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The average speed of the object is given by the ratio between the total distance covered and the total time needed for the motion:
$v= \frac{S}{t}$

The total distance covered is:
S=2m + 80 m = 82 m

while the total time of the motion is
t=2s+40 s=42 s

Therefore, the average speed of the object is
$v= \frac{S}{t}= \frac{82 m}{42 m}=1.95 m/s$

Answer from: Quest

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm. the wire diameter is d = 0.9 mm. the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2) in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

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