Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The linear momentum of the crate is Fv
Indicate whether the statement is true or false
F
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In the diagram below, which point indicates the location on the HR diagram of a one solar mass star when it undergoes helium flash?
a.
1
b.
2
c.
3
d.
4
e.
5
Parallel-Plate Capacitor: Each plate of an ideal air-filled parallel-plate capacitor has an area of 0.0010 m2, and the separation of the plates is 0.050 mm. An electric field of 7.4 × 106 V/m is present between the plates. What is the capacitance of this capacitor? (?0 = 8.85 × 10-12 C2/N ? m2)
A. 180 pF B. 120 pF C. 300 pF D. 240 pF E. 360 pF
The reason that you would use a ramp to carry a weight to the top of a platform, rather than lifting it up a ladder, is because the
a. force exerted would be less b. work done would be less c. power expended would be less d. gain in potential energy would be more
A circular coil lays flat on a horizontal table in a region where the magnetic field is straight down. The magnetic field is suddenly removed. When viewed from above, what is the direction of the current in the coil as the field is removed?
A. clockwise B. clockwise initially, then counter-clockwise before going to zero C. counter-clockwise D. There is no induced current.