To test the performance of its tires, a car travels along a perfectly flat (no banking) circular track of radius 151 m. The car increases
its speed at uniform rate of
at ≡
d |v|
dt = 2.51 m/s
2
until the tires start to skid.
If the tires start to skid when the car reaches
a speed of 25.9 m/s, what is the coefficient of
static friction between the tires and the road? The acceleration of gravity is 9.8 m/s
2
.

Which statement best describes how private industry decides where to spend the money on research and development

A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.