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The hydraulic brake used in automobiles is a direct application of ____________ .

 The size of atomic nucleus is of the order of __________ .

The image formed by convex lens in a simple microscope is _________ .

The filament string in an electric bulb is made of which metal? 

What is a magnetic field’s direction within a magnet?

Two test charges are brought separately into the vicinity of acharge +Q. First, test charge +q is brought to point A a distance rfrom +Q. Next, +q is removed and a test charge +2q is brought topoint B a distance 2r from +Q. Compared with the electrostaticforce on the charge at A, the force on the charge at B is
1
a factor of 4 weaker.
the same.
a factor of 4 stronger.
a factor of 2 stronger.
a factor of 2 weaker.
.

Nineteen (19) 137Cs radiation therapy sealed sources totaling 0.604 Ci were stolen from Moses Cone Hospital in Greensboro, NC and never recovered (true story). 137Cs emits a 0.667 MeV gamma ray. What is the dose rate at 4 feet from the sources?

What detail has upset Oedipus?

a. Why Liaus was killed

b. Where Liaus was killed

c. How Liaus was killed

d. When Liaus was killed

Eighteen-gauge wire has a diameter of 1.024 mm. Calculate theresistance of 19 m of 18 gauge lead wire at 20°C.

Omega?

What chemical is present in wood?

What is Pythagoras theorem?

What mass of aluminum can be heated from 12.71 to 72.03 by 5,737.39 amount of energy?

Round your answer to the nearest hundredth.

ANALYZE What alleles can each heterozygous vizsla parent pass on in his or her gametes?

What is the probability equation?

When 200 g of Aluminum at 100°C is dropped into an aluminum calorimeter of mass 120g and containing 150 g of kerosene at 15°C, the mixture reaches a temperature of 50° C. What is the specific heat of kerosene?

What is heterogeneous mixture?

(B) Water,  

Molarity (M) is calculated as:  . Mwould be considered a derived unit. 

A. True 

B. False

Molar mass of CaSO4

One (1) mol of Propane is placed in an adiabatic, constant pressure combustion chamber at 25 C. The reaction will follow: C3H8 + 5O2 → 3CO2 + 4H2O What is the final temperature of the system under those various cases? Assume complete combustion

a.. it is mixed with a stoichiometric amount of oxygen and reacts to form H2O and CO2

b. It is mixed with a stoichiometric amount of air (same reaction than a)

What mass of Li3PO4 can be prepared from the complete reaction of 7.17g of LiOH with a stoichiometric amount of H3PO4?

The distinctive odor of vinegar is due to acetic acid HC2H3O2 , which reacts with sodium hydroxide in the following fashion: HC2H3O2 (aq) + NaOH (aq) → H2O (l) + NaC2H3O2 (aq) A titration of vinegar with a solution of NaOH was performed. If 3.05 mL of vinegar needs 42.5 mL of 0.115 M NaOH to reach the equilvance point in a titration, how many grams of Acetic Acid are in each mL of vinegar?

A. 0.403

B. 2.31

C. 0.0904

D. 0.0962

Calculations for the titration of vinegar with sodium hydroxide

	Trial 1	Trial 2	Trial 3
Volume of vinegar (mL)	5.00	5.00	5.00
Final volume NaOH (mL)	43.11	43.90	43.45
Initial volume NaOH (mL)	3.50	2.80	3.70
Volume NaOH used (mL)
Volume of NaOH used (L)
Moles of NaOH used (mol)
Moles of  COOH (mol)
Mass of  COOH (g)
% (m/v)  COOH in vinegar

2Ag + Mg(NO3)2 → 2AgNO3 + Mg

If 7.96 moles of magnesium nitrate are used in the reaction, how many moles of the product containing silver is produced?

One advantage of the Kelvin system is that it is impossible to have temperatures below zero.

The prefix centi - denotes what fraction of a basic unit?

How does milk change into curd or butter?

What is the procedure to be followed when an accident involving corrosive reagents occurs in the laboratory?