A mass m=88.6 kg slides on a frictionless track with initial velocity vA=12.3 m/s at Position A with height hA=42.4 m. It passes over a lower hill with a height hB=21.6 m (at Position B) before stopping by running into a large spring with spring constant k=5173 N/m at Position C at height hC=20.3 m. The mass is brought to a stop at Position D, after compressing the spring by a length of d. Find the speed of the object (vB) at position B in m/s and the amount the spring is compressed (d) in m. Select one value for the speed at position B (vB) and one for the distance (d).

Which statement correctly describes the relationship between frequency and wavelength?

Astudent is working in the lab to determine how time affect impulse the student keeps the force the same in each row but changes impact the time some data is shown witch trial has the greatest a student is working in the lab to determine how time affect impulse the student keeps the fours the same in each row but change is the impact time some data shown witch trial has the greatest impulse

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?