Uma particula de carga eletrica q= 2,0.10^-6c é lançada num campo magnético uniforme de intensidade B =4,0.10^ com velocidade v=20 m/s, sendo v perpendicular a B, conforme a figura. Determine a intensidade, a direção e o sentido da força magnética que atua na particula

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Aheat engine that operates on a carnot cycle has an efficiency of 0.420 when its low-temperature reservoir is at 10 ∘c.part aby how many degrees celsius must you increase the temperature of the high-temperature reservoir to increase the efficiency to 0.600 if you continue to use the same low-temperature reservoir?

Athird point charge q3 is now positioned halfway between q1 and q2. the net force on q2 now has a magnitude of f2,net = 5.861 n and points away from q1 and q3. what is the value (sign and magnitude) of the charge q3?