Apoint charge q moves on the x-axis in the positive direction with a speed of 290 m/s. a point p is on the y-axis at y = +60 mm. the magnetic field produced at point p, as the charge moves through the origin, is equal to -0.3 μt k^. 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)

0.22 μt
0.38 μt
0.17 μt
0.33 μt
0.28 μt

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

The substances that are necessary for producing of certain hormones and that store and transport vitamins