If the speed of a car is doubled but the brakes apply the same force, the distance required to stop the car changes by a factor of
A. ½.
B. 2.
C. ¼.
D. 4.
E. 1.
Answer: D
Physics & Space Science
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A thin copper rod 1.00 m long has a mass of 50.0 g. What is the minimum current in the rod that would allow it to levitate above the ground in a magnetic field of magnitude 0.100 T?
1.1.20 A 2.2.40 A 3.4.90 A 4.9.80 A 5.none of those answers
Physics & Space Science
5 inch diameter spherical oranges are placed in a cooler at 75ºF. The cooler is at 38ºF, the convective heat transfer coefficient is 18 Btu/hr?ft^2 ?ºF and the properties of oranges are the same as water. Determine the time when the surface of the oranges are 40ºF.
What will be an ideal response?
Physics & Space Science
The unit F, the farad, is equal to which of the following?
A. V/m
B. V/C
C. 
D. C/V
E.
Physics & Space Science
Explain the changes that occurred as the Universe expanded
What will be an ideal response?
Physics & Space Science