What is the minimum time that a warm up should last?
A
5 minutes
B.
10 minutes
C.
15 minutes
D.
30 minutes

Which sound characteristic is not affected by the relative motion of an object

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

Can someone me with my physics questions? i need correct answers only!