a race car around a circular track with a radius of 600 m, experiencing a friction force of 1500 N. If that race car was to drive around another circular track with a radius of 300 m, how much friction would it experience?

Which type of electromagnetic waves are dangerous enough to be used to kill cancerous cells? (a)gamma rays (b)visible light (c)infrared light (d)microwaves

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2