One particle has a charge of -1.87 x 10-°C, while another particle has a charge of -1.10 x 10-°C. If the two particles are separated by 0.05, what is
the electromagnetic force between them? The equation for Coulomb's law is
F = kq192 , and the constant, k, equals 9.00 x 10-9 Nm²/C2.
A. 7.41 x 10-6 N.
B. -7.41 x 10-6N
C. 3.70 x 10-7N
D. -3.70 x 10-7 N

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

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