If the maximum possible accuracy in measuring the lifetime of a particle increases, the maximum possible accuracy in measuring its energy will
A) increase.
B) decrease.
C) not be affected.
B
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A parallel-plate vacuum capacitor has an area of 1×10-4m2, a spacing between the plates of 1×10-3 m, and a voltage of 1 V.
(a) Calculate the capacitance of this capacitor. (b) A microcapacitor is replacing the capacitor in part (a). It must have the same capacitance; however, the new area is 1×10-10 m2, and the spacing between the plates is now 1×10-6 m, with 1 V applied. (b1) What is the dielectric constant and dielectric strength required for the material inthe microcapacitor? (b2) Are there any materials available that can meet these requirements, and if so, what are they? (b3) What is the polarization (P) in this microcapacitor, and how does this polarization compare to the surface-charge density if this were a vacuum capacitor?
Which describes the direct change in genetic information of a cell?
a. chromosome b. mutation c. evolution d. natural selection e. heredity
Two people are lifting a 2.0-m wide, 80-kg, office desk by the ends. One side is heavier than the other, and it is found that the person exerting the larger force is exerting a vertical force of 500 N
How far from that person is the center of mass of the desk? A) 0.73 m B) 1.3 m C) 1.4 m D) 0.58 m E) 1.0 m
A Styrofoam ice chest is 2 cm thick. If the inside of the chest is at 0ºC and outside the chest it is 25ºC, estimate the heat transfer by conduction through the Styrofoam per unit area.
What will be an ideal response?