Two Initially Uncharged Identical Metal Spheres 1 and 2 Are $\mu$

question 69

Multiple Choice

Two initially uncharged identical metal spheres 1 and 2 are connected by an insulating spring (unstretched length of 0.68 m) .Charge +6.2 $\mu$ C is placed on the first sphere and -6.2 $\mu$ C on the second sphere,causing the spring to contract to a length of 0.43 m.If someone coats the spring with metal to make it conducting,what is the new length of the spring? Recall that the force exerted by a spring is k $\Delta$ x,where $\Delta$ x is the change in the spring's length from its unstretched/uncompressed length.

• A)0.25 m
• B)0.43 m
• C)0.56 m
• D)0.68 m
• E)0.75 m

---

Definitions:

Demand Elasticities

Measures the responsiveness of demand for a good or service to changes in its price or other factors.

Tax Incidence

The analysis of the effect of a particular tax on the distribution of economic welfare.

Specific Excise Taxes

Taxes imposed on a particular good or service, charged by quantity rather than value, such as per gallon or per pack.

Consumer Goods

Products that are sold directly to consumers for their personal or household use.