Does it make sense to say that an object has twice as much heat as another? Why?
What will be an ideal response?
No. Heat is not an intrinsic property of bodies. It is energy that is transferred from one body to another.
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When a mass of 180 g is attached to a vertical spring and lowered to its equilibrium position, it is found that the spring extends 12 cm
If the mass is now displaced from its equilibrium position, what is the period of the resulting oscillations? A) 2.2 s B) 3.7 s C) 0.69 s D) 9.0 s E) 1.5 s
A plane flying horizontally at a speed of 50 m/s and at an elevation of 160 m drops a package, and 2.0 s later it drops a second package. How far apart will the two packages land on the ground if air resistance is negligible?
A) 100 m B) 160 m C) 320 m D) 180 m
A steel ball bearing of mass m1 and speed of magnitude v1 has a head-on elastic collision with a steel ball bearing of mass m2 at rest. Rank the speed v1 of m1 relative to v2, the magnitude of the speed of m2, after the collision when i) m1 > m2; ii) m1 = m2; and iii) m1 < m2
a. v1 < v2; v1 < v2; v1 < v2 b. v1 < v2; v1 = v2; v1 > v2 c. v1 < v2; v1 > v2; v1 > v2 d. v1 > v2; v1 = v2; v1 < v2 e. v1 > v2; v1 > v2; v1 > v2
Imagine that the energy levels of a certain system are proportional to 
, where n = 1, 2, 3, …. Imagine that for some reason, only transitions such that ?n = 1 are physically possible. In a spectrum chart (like the one shown in figure Q11.2) the emission lines produced by this system
A. Get closer together (in energy) as we go to the right.
B. Are evenly spaced (in energy).
C. Get farther apart (in energy) as we go to the right.