【题目】 一道SAT数学题 A spherical balloon with radius r inches has v olum e V (r)=4/3mr^3. Find a function that r epresents th e amount of air required to inflat e th e balloon from a radius of r inches to a r adius of r+1 inches. ...
A spherical ball of radiusR=0.5mwith a volume charge density ofρ=3mCm3sitting inside of it has a very thin shell covering its surface with a surface charge density ofσ=1.2mCm2on it as shown in the below diagram. a)Wha...
Consider a conducting spherical shell of radius R with its center at the origin, carrying uniform positive surface charge density. The variation of the magnitude of the electric field |→E(r)| and the electric potential V(r) with the distance r from the center, is be...
The 1 m radius spherical chamber employed Ar N gas scintillation, gas-proportional scintillation, and electron drift timing to provide charge, energy, and pathlength correction information. The details of the scintillation and drift processes are presented and the combination of these techniques in ...
The radius of a spherical ball is measured at r=17 cm. Estimate the maximum error in the volume if r is accurate to within 0.3 cm. (Give your answer to one decimal place.) ΔV Estimate the maximum error in the surface area if r is a...
Here we report the synthesis of a 3D, spherical p-conjugated molecule, in which sp2-carbons of 1,3,5-trisubstituted and 1,4- disubstituted benzenes are covalently bonded forming a ball-like molecule. The synthesis involves the assembly of four molecules of tristannylated 1,3,5-benzene ...
We also found that the most preferred radius differed among strains. Notably, the preference was independent of the volume of substrates, suggesting that D. suzukii uses the surface curvature as a cue for its oviposition site selection. These results provide an additional explanation for why D. ...
An element has a density of 19.5 g/cm3. What is the radius of a sphere that has a mass of 60 kg of this material? A spherical ball of lead has a diameter of 5.0 cm . what is the mass the sphere of lead has q density of 11.34 \frac{g}{cm} Calculate the mass in kil...
The NTDs of each pentamer are associated proximal to the five-fold axis and form a layer of structure at a radius of 86.3 Å (NTD centroid distance) from the particle centre. Beneath the NTDs, the CTDs form an “inner cage” layer (Fig. 2b) at a radius of 64.7 Å (CTD...
at 14 ms, the radius predicted by one model was about 0.5 mm while that predicted by another model was about 3 mm. It is known that, the heat transfer rate by latent heat, QLH, for a single nucleation site is proportional to the cube of the bubble departure diameter as given by Eq....