A student builds an electromagnet, as shown. Will the compass needle move when brought near the electromagnet, and why?
A. Yes. The needle of a compass changes direction randomly when brought near the electromagnet.
B. No. The needle of a compass will not react because the wires are not connected to the battery properly in order to create a working electromagnet.
C. No. The needle of a compass only aligns itself with an electric field, which cannot be created by the electromagnet.
D. Yes. The needle of a compass aligns itself with the magnetic field created by the

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.

The object's initial distance above the groundthe object's initial velocity

Since you have not included the experiment situation and the data, of course, i can not give you specific details about it. but i can you with this question.1) i will assume that the motion is projectile (parabolic) motion.2) yes, the horizontal distance depends on the horizontal velocity as, naming vx the horizontal velocity and t the time, it is: x = vx × t3) now, observe that the flight time depends on the vertical velocity as, naming voy the initial vertical velocity, t the time and y the vertical distance before reaching the ground: y = yo + voy×t - gt² / 2.the higher the initial vertical velocity (voy) the longer the object will be flying and so t will be higher in the equation for the horizontal distance.that explains the relationship between the horizontal distance and the horizontal velocity.