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

Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90