The lowest velocity which a body must have in order to escape the gravitational attraction of a particular planet or other object.
Answer:
(C) ln [Bi]
Explanation:
Radioactive materials will usually decay based on their specific half lives. In radioactivity, the plot of the natural logarithm of the original radioactive material against time will give a straight-line curve. This is mostly used to estimate the decay constant that is equivalent to the negative of the slope. Thus, the answer is option C.
Answer:
18.6h
Explanation:
To solve this Duck's second law in form of Diffusion will be used.
Also note that since the temperature is constant D (change) will also be constant.
Please go through the attached files for further explanation and how the answer Is gotten.
Answer:
The ideal mechanical advantage (IMA) of the pulley is 6
Explanation:
The question parameters are;
The mass of the actress playing Peter Pan = 125 lb
The force applied by the stagehand to the pulley to hoist her = 30 lbs
The Ideal Mechanical Advantage (IMA) of a pulley = The number of strands (rope) the pulley has
Therefore, the Ideal Mechanical Advantage (IMA) of the given pulley with 6 strands = 6.
Answer:
ΔK.E. = - 142.72 kJ
Explanation:
mass = 884 kg
initial velocity = 68 km/h = 68 \times \frac {5}{18} = 18.89 m/s
final velocity = 0 m/s
height = 69 m
change in kinetic energy :
ΔK.E. = 
ΔK.E. =
ΔK.E. =-142,716.05 J
ΔK.E. =-142.72 kJ
hence change in kinetic energy of the automobile is -142.72 kJ