Please answer all parts and make sure all are 100% correct solutions and do NOT use calculus (integration, etc.) to solve any of them. Thank you!

A particle of mass m and charge q travels in a circular path of radius 26 cm perpendicular to a uniform magnetic field of unknown strength. The particle travels with a constant speed of 5 x 10 m/s. A second particle, with mass 4m and charge 2q, travels at the same speed as the first particle, also travels in a circular path perpendicular to the same magnetic field. What is the radius of the second particle's circular path? (1) 52 cm (2) 104 cm (3 208 cm (4) 26 cm (5) 13 cm. A wire carries a. current of 10 A in the direction shown in the gure. An electron moves perpendicular away from the wire with a speed of 2.5 X 106 m/s. What is the magnitude of the force acting on the electron when it is 2 cm from the wire? (1) 4.0 x 1017 N (2) 1.0 x 10-4 N (3) 2.0 x 10-4 N (4) 0 (5) 5.0 N What is the direction of the force acting on the electron in the previous problem? (2) y (5) 0 (1) -y (3) +z (4) - 2A large MRI magnet is a large solenoid (with superconducting wires having zero resistance) with diameter 0.60 m and length 1.8 m. During normal operation, the current through the windings is 110 A and the magnetic field magnitude is 1.8 T. How many total windings does the MRI magnet have? (1) 23,400 (2) 17,600 (3) 13,000 (4) 15,500 (5) 16,900