Mass on a Spring: A 92-kg man climbs into a car with worn out shock absorbers, and this causes the car to drop down 4.5 cm. As he drives along he hits a bump, which starts the car oscillating at an angular frequency of 4.52 rad/s. What is the mass of the car?
A. 890 kg
B. 760 kg
C. 920 kg
D. 990 kg
E. 1900 kg
Answer: A
You might also like to view...
You have a parallel circuit in a house that operates on 120 V with several outlets for plugging in appliances and it has a 20 A fuse in the circuit. What is the maximum number of 600-W appliances that can be plugged into the outlets without "blowing" the fuse? Assume that if the current flow exceeds the rating of the fuse, it will blow
a. 2 b. 4 c. 5 d. 7
According to Einstein's E=mc2 and the "field view of reality,"
A) atoms are entirely empty space--containing only fields. B) an atom's mass arises from the energy of its own fields. C) Both of the above. D) atoms are mostly empty space, and consist of very tiny indestructible material particles that are attached to the atom by means of electromagnetic and other fields. E) chocolate ice cream vanishes whenever you don't look at it.
In Figure 7.4, the time for the fraction of residual strain in iron to drop to 0.6 at 400°C is 137 minutes, and at 450°C it is 15 minutes.
(a) Calculate the activation enthalpy for the recovery of cold work in iron. (b) Comment on the magnitude of the activation enthalpy for recovery in comparison to the activation enthalpy for vacancy diffusion in iron, and justify your result.
Is the back side of the Moon always dark?
What will be an ideal response?