The closed wire loop shown in the figure carries a current of 9
A counterclockwise. The radius of the outer arc is 49 cm and that of the
inner 29 cm. Determine the magnetic field (modulus, and direction) at
point P.
Help: The magnetic field created by a wire loop arc can be calculated as a
fraction (function of the angle) of that created by the entire wire loop of
the same radius.

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

What is a carrier wave and how does it affect what you hear on the radio