Apoint charge q moves on the x-axis in the positive direction with a speed of 370 m/s. a point p is on the y-axis at y = +80 mm. the magnetic field produced at point p, as the charge moves through the origin, is equal to -0.80 μt along z-direction . when the charge is at x = +40 mm, what is the magnitude of the magnetic field at point p? (μ0 = 4π × 10-7 t ∙ m/a)

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?