The first experiment, which systematically demonstrated the equivalence of mechanical energy and heat, was performed by
a. Joule.
b. Boltzmann.
c. Thompson, Count Rumford.
d. Kelvin.
a
You might also like to view...
The index of refraction for a certain material is 1.399 for red light and 1.432 for blue light. Find the angle separating the two refracted colors if the:
(a) angle of incidence is 30°. (b) angle of incidence is 60°.
At t = 0, a particle is located at x = 25 m and has a velocity of 15 m/s in the positive x direction. The acceleration of the particle varies with time as shown in the diagram. What is the velocity of the particle at t = 5.0 s?
?
?
A. +15 m/s B. ?15 m/s C. +30 m/s D. 0 E. ?1.2 m/s
If two forces of equal magnitude act on an object that is hinged at a pivot, the force acting farther from the pivot must produce the greater torque about the pivot
A) True B) False C) unable to decide without knowing the shape of the object
What resistance must be put in series with a 30-mH inductor at 4000 Hz to have a total impedance of 8.0 × 104 ??
A) 30 × 104 ? B) 5.0 × 104 ? C) 6.0 × 104 ? D) 7.0 × 104 ? E) 8.0 × 104 ?