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Bissoy Health Tips
সব দেখুন
Which of these statements concerning foodborne botulism is false? a) It is not a central nervous system infection. b) Blurred vision is an early symptom. c) Food can taste normal but still cause botulism. d) Treatment is based on choosing the correct antibiotic. e) Control of the disease depends largely on proper food-canning techniques.
Md Ariful Islam
(15976 পয়েন্ট)
Nuclei in a radium-226 radioactive source emit photons whose energy is 186 keV . These photons are scattered by the electrons in a metal target; a detector measures the energy of the scattered photons as a function of the angle θ through which they are scattered. Find the energy of the γ -rays scattered through θ=90.0^∘ and 180.0^∘ .
Md Ariful Islam
(15976 পয়েন্ট)
Materials containing the elements Y, Ba, Cu, and O that are superconductors (electrical resistance equals zero) at temperatures above that of liquid nitrogen were recently discovered. The structures of these materials are based on the perovskite structure. Were they to have the ideal perovskite structure, the superconductor would have the structure shown in part (a) of the following figure. a. What is the formula of this ideal perovskite material? b. How is this structure related to the perovskite structure shown in Exercise 85 ? These materials, however, do not act as superconductors unless they are deficient in oxygen. The structure of the actual superconducting phase appears to be that shown in part (b) of the figure. c. What is the formula of this material?
Md Ariful Islam
(15976 পয়েন্ট)
The molar mass of a certain metal carbonate, MCO3, can be determined by adding an excess of HCl acid to react with all the carbonate and then "back-titrating" the remaining acid with NaOH. (a) Write an equation for these reactions. (b) In a certain experiment, 20.00 mL of 0.0800 MHCl was added to a 0.1022-g sample of MCO3. The excess HCl required 5.64 mL of 0.1000 M NaOH for neutralization. Calculate the molar mass of the carbonate and identify M.
Md Ariful Islam
(15976 পয়েন্ট)
How do you simplify $sqrt325-sqrt117$?
Md Ariful Islam
(15976 পয়েন্ট)
What is the mesosphere made of?
Md Ariful Islam
(15976 পয়েন্ট)
What is the crust of the earth made out of?
Md Ariful Islam
(15976 পয়েন্ট)
Is the center of the earth hot?
Md Ariful Islam
(15976 পয়েন্ট)
What was earth created by?
Md Ariful Islam
(15976 পয়েন্ট)
What created earth's magnetic field?
Md Ariful Islam
(15976 পয়েন্ট)
What created earth's early atmosphere?
Md Ariful Islam
(15976 পয়েন্ট)
How do scientists know how the earth was created?
Md Ariful Islam
(15976 পয়েন্ট)
How do scientist theorize the earth was created?
Md Ariful Islam
(15976 পয়েন্ট)
How do scientists believe the Earth was created?
Md Ariful Islam
(15976 পয়েন্ট)