Question 1 of 25 2 Points
The diagram below shows the velocity vectors for two cars that are moving
relative to each other.
45 m/s west
Car 1
25 m/s east
Car 2
From the frame of reference of car 2, what is the velocity of car 1?
A. 70 m/s east
OB. 20 m/s west
Ο Ο Ο Ο
O C. 70 m/s west
OD. 20 m/s east
SUBMIT

Describe uniform velocity and variable velocity in short

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?