Assume the size of the Sun is represented by a baseball with the Earth is about 15 meters (150 million km or 8 light minutes) away. How far away, to scale, would the nearest stars to the Sun be? Choose the closest answer
a. about the distance between New York and Boston (330 km)
b. 100 meters away
c. about the distance across the United States from New York to Los Angeles (4300 km)
d. about the distance across 50 football fields (50 × 100 m)
c
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Simple Harmonic Motion: The figure shows a graph of the position x as a function of time t for a system undergoing simple harmonic motion. Which one of the following graphs represents the acceleration of this system as a function of time?
A. graph a B. graph b C. graph c D. graph d
A 50.0-N box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. You observe that at one instant the box is sliding to the right at 1.75 m/s and that it stops in 2.25 s with uniform acceleration
What magnitude force does friction exert on this box? A) 3.97 N B) 8.93 N C) 38.9 N D) 50.0 N E) 490 N
An ideal spring has a spring constant (force constant) of 60 N/m. How much energy does it store when it is stretched by 1.0 cm?
A) 0.30 J B) 60 J C) 0.0030 J D) 600 J
Determine the heat transfer per unit area for pool boiling water at 200 kPa and where the surface temperature of the container is 135ºC. Compare results using Equation 10-4 to those using Equation 10-6. Assume a surface tension of 45 mN/m for water at 200 kPa.
What will be an ideal response?