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danny

Questions and answers by danny, page 2

Questions (285)

Find the lateral area for the prism.what formula do i us for this?
1. 3 answers
2. 444 views
Find the volume of the prism.whats the formula i would use?
1. 1 answer
2. 471 views
how do u find the volume of a prism,when each side 12?
1. 1 answer
2. 297 views
owen has a 4in x 6 in photo. he wants to get the photo enlarged to an 8in x 10 in size. find the scale factor
1. 1 answer
2. 487 views
how do u find the diameter when they only give u the circumference?
1. 1 answer
2. 281 views
mathematical relationship between period and frequency
1. 3 answers
2. 495 views
If the radius of this cylinder is doubled, its volume will betwice as much four times as much eight times as much is it four
1. 4 answers
2. 1,592 views
Two similar polygons have areas of 16 square inches and 64 square inches. The ratio of a pair of corresponding sides is 1/4.True
1. 4 answers
2. 1,965 views
A square has symmetry with respect to a line containing a median of the square.True False true?
1. 2 answers
2. 538 views
An isometry preserves distance.True False true?
1. 5 answers
2. 1,301 views
All diagonals from a single vertex of a hexagon are drawn. Four triangles will result.True False true?
1. 3 answers
2. 1,221 views
The only defined term of those listed is:line angle plane point
1. 3 answers
2. 3,274 views
is a line graph a table?
1. 1 answer
2. 259 views
a farmer raises chickens and cows. there are 34 animals in all. the farmer counts 110 legs total on these animals. how many
1. 6 answers
2. 5,289 views
a handful of coins is worth $1.50. there are a total of 54 pennies and quartes in the hand
1. 1 answer
2. 699 views
In the past a certain college has found that 35% of the students will grad within 4 years. A random sample of 450 students at
1. 2 answers
2. 558 views
Elisa need to pick a numerical password that contains 4 digits using the numbers 0-9 If none of the digits can be repeated, how
1. 3 answers
2. 422 views
Yard saleAll items priced from .50-2.50 Median Price 2.10 Median Price 1.80
1. 1 answer
2. 348 views
A variable-speed drill, initially turning at 500 rpm, speeds up to 1300 rpm in a time interval of 0.8 s. What is its average
1. 3 answers
2. 726 views
Sam's plasma tv has a 14inby18in screen and border. The total area of the tv 480inch^2. How wide is the trim
1. 1 answer
2. 349 views
x^2+6x=24
1. 3 answers
2. 322 views
Renter’s Insurance protects a person who is renting an apartment from losses or damages that can occur in the apartment
1. 4 answers
2. 477 views
Use (Triangle) PQR with coordinates P(2, –1), Q(0, 5), and R(–2, 0).Which matrix expression can be used to translate
1. 2 answers
2. 586 views
Which of the following is the solution to the matrix equation below?[0 9 2] [18] [3 2 1] x=[5] [1 -1 0] [-1] a) [-3 -2 18] b)
1. 1 answer
2. 964 views
can someone help me simplify 3/4i
1. 1 answer
2. 231 views
United States citizens living in Switzerland must pay taxes on their income to both the United States and to Switzerland.
1. 1 answer
2. 876 views
If f(x)=(4x+8)^-2, Find f'(x)
1. 4 answers
2. 228 views
Write the composite function in the form f(g(x)). [Identify the inner function u=g(x) and the outer function y=f(u).] Then find
1. 3 answers
2. 3,259 views
If f(x)=sin^5x, Find f'(x)i don't know im doing right way f'(x)= 5cosx * sin(x)
1. 4 answers
2. 315 views
1. 8sin(cos(x^6)), find f'(x)2. cos(sin(x^2)), find f'(x).
1. 3 answers
2. 313 views
so i suppose to find slope.i have trouble this problem. my math book is not really clear. Find the slope of the tangent line to
1. 3 answers
2. 531 views
The figure is taken from a paper (Am J Sports Med 2004 32: 477) on injuries to the anterior cruciate ligament due to forces
1. 1 answer
2. 465 views
Assume that you’ve worked for the last five years as anadministrative assistant for the Human Resources Department of
1. 6 answers
2. 2,265 views
Assume that you’ve worked for the last five years as anadministrative assistant for the Human Resources Department of
1. 4 answers
2. 528 views
Assume that you’ve worked for the last five years as anadministrative assistant for the Human Resources Department of
1. 2 answers
2. 625 views
Assume that you’ve worked for the last five years as anadministrative assistant for the Human Resources Department of
1. 7 answers
2. 1,834 views
Draft an email of at least four complete sentences to Deb Walker the designated trainer:Confirm the arrangements for the seminar
1. 6 answers
2. 687 views
Can someone check gammar, punctuatiion and structure please.Draft an email of at least four complete sentences to Deb Walker the
1. 1 answer
2. 427 views
find given the funcrion k described by k(x) =12x, find each of the following (a) k(-19),(b0 K (10)(c) k(21),k(-19)=
1. 1 answer
2. 268 views
Attach 6 trapezoids to one hexagon for each figureFigure 1: One line of symmetry and no rotational symmetries (other than 360
1. 1 answer
2. 466 views
make a tally and a frequency table for the number of books read by students during the summer: 4, 5, 7, 2, 4, 5, 6, 7, 8, 4, 5,
1. 1 answer
2. 406 views
What is the angle sum of a regular polygon with 7 sides
1. 2 answers
2. 648 views
If the answer is an amount of money, round to the nearest dollar.Maria has saved $420 at a bank. She wants to accumulate $1250
1. 1 answer
2. 329 views
Solve the problem.A collection of dimes is arranged in a triangular array with 14 coins in the base row, 13 in the next, 12 in
1. 1 answer
2. 400 views
A delicatessen serves 10 kinds of sandwiches and 5 kinds of chips. How many different sandwich and chip lunches can they make if
1. 1 answer
2. 407 views
An open box is made from a square piece of cardboard 20 inches on a side by cutting identical squares from the corners and
1. 4 answers
2. 4,263 views
A steel tube has an outside diameter of 15 cm, an inside diameter of 13 cm,and is 3.7 m long.What is the volume of the steel
1. 5 answers
2. 2,929 views
Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a
1. 2 answers
2. 520 views
a uniform (in density and shape) stick is balanced by one end on the ground and the other tied to a massless horizontal rope
1. 1 answer
2. 1,001 views
Why is it important to make sure that the volume of water and the startingtemperature are the same in each trial ?
1. 2 answers
2. 476 views
What is the mass of 4.3× 10 to the power of15 atoms of nickel (Ni)?
1. 1 answer
2. 444 views
What is the final concentration of 35.7mL of 52.0% m/m solution that is diluted to 65.9ml?i am not sure how to caluclate this...
1. 1 answer
2. 380 views
What is the purpose of the resonator stringed instrument
1. 5 answers
2. 511 views
What role does the lilac flower play in its natural ecosystem? What is its niche in the food webAre there any ecological issues
1. 2 answers
2. 737 views
Suppose you mix hydrogen, CCl4, CO2, NO2 and fluorine gases together and allow them to reach an equilibrium temperature. Which
1. 1 answer
2. 381 views
If you burn 13.7 g of methane (CH4) burns in oxygen, then 686 kJ is evolved. What is the amount of heat produced per mole of
1. 4 answers
2. 713 views
The radiator in your car uses either water or ethylene glycol (anti-freeze) to remove heat from the engine and dissipate it to
1. 4 answers
2. 651 views
A 36.0 g piece of copper at 130.0 C is placed in 50.0 g of water at 20.0 C. What is the temperature (in C) of the water once the
1. 3 answers
2. 492 views
The thermite reaction demonstrated in class requires high temperatures to start the reaction. A simple open flame is not enough
1. 3 answers
2. 730 views
A typical multivitamin tablet can contain 2.00mg of vitamin B2 (riboflavin), and the RDA is 0.0030 g/day. How many such tablets
1. 3 answers
2. 1,732 views
What is the mass of 5.00L of pure water?
1. 3 answers
2. 1,644 views
The value for ΔH° for the reaction below is -72 kJ. How many kJ of heat are released when 1.0 mol of HBr is formed in this
1. 3 answers
2. 1,540 views
What is the specific heat capacity of aluminum if a 8.4 g sample increased 21.1 C upon the addition of 159.0 J? The units are
1. 2 answers
2. 493 views
What is the specific heat capacity of aluminum if a 8.4 g sample increased 21.1 C upon the addition of 159.0 J? The units are
1. 1 answer
2. 409 views
The radiator in your car uses either water or ethylene glycol (anti-freeze) to remove heat from the engine and dissipate it to
1. 2 answers
2. 625 views
What is the specific heat capacity of ethanol (C 2H 6O) if a 18.3 g sample increased 12.3 C upon the addition of 553.0 J? The
1. 2 answers
2. 507 views
The enthalpy change for the following reaction is -483.6 kJ:2H2(g) + O2(g) = 2H2O(g) Therefore, the enthalpy change for the
1. 3 answers
2. 2,948 views
In the reaction below, ΔH°f is zero for ___________.Ni(s) + 2CO(g) + 2PF3(g) = Ni(CO)2(PF3)2(l) Ni(s) CO(g) Ni(CO)2(PF3)2(l)
1. 4 answers
2. 10,938 views
Suppose you add 92 ml of dilute acid to 46 ml of water. Both the water and acid were at room temperature (22 C) before being
1. 2 answers
2. 478 views
Suppose that your morning shower is 7 minutes long and uses 4 gallons of water per minute that is a nice 102 F in temperature.
1. 2 answers
2. 595 views
Calcium carbide (CaC2) reacts with water to form acetylene (C2H2) gas and calcium hydroxide (Ca(OH)2). If the ΔH for:CaC2(s) +
1. 3 answers
2. 2,161 views
Given:Equation #1: 4NH3(g) + 5O2(g) = 4NO(g) + 6H2O; ΔH of reaction = -1170 kJ Equation #2: 4NH3(g) + 3O2(g) = 2N2(g) + 6H2O;
1. 4 answers
2. 2,623 views
How many core electrons are there in a ground state phosphorus atom?
1. 2 answers
2. 559 views
Given the following values of ΔH, ΔS and T, calculate ΔG (in kJ). The values are: ΔH = -95.0 kJ, ΔS = 217 J/K, and
1. 1 answer
2. 402 views
Given the following values of ΔH, ΔS and T, calculate ΔG (in kJ). The values are: ΔH = 23.0 kJ, ΔS = 125 J/K, and
1. 1 answer
2. 396 views
Suppose you have a reaction that has a ΔH of +80 kJ and a ΔS of 215 J/K. At what temperature will this reaction change from
1. 1 answer
2. 409 views
ΔS is positive for which one of the following reactions?Ag+(aq) + Cl- (aq) = AgCl(s) N2(g) + 3H2(g) = 2NH3(g) CaO(s) + CO2(g) =
1. 2 answers
2. 662 views
Which of the following reactions will be spontaneous at standard state? Not all the reactions are balanced, so make sure they
1. 3 answers
2. 653 views
Which of the following processes is entropy increasing in the local system? You may select multiple processes.Combination
1. 2 answers
2. 660 views
Calculate the change in free energy when you drop 4.70 g of calcium metal into a beaker containing excess water so that
1. 1 answer
2. 409 views
White phosphorus (P4) was used for a long time in military incendiary bombs and ordnances. White phosphorus reacts with oxygen
1. 2 answers
2. 578 views
Calculate the change in Gibb’s free energy when 1.63 moles of sodium metal react with excess chlorine gas to form sodium
1. 2 answers
2. 510 views
Ethylene gas (C2H2) can be formed from the reaction of calcium carbide (CaC2) with water. What is the reaction rate if 14.2
1. 2 answers
2. 604 views
If the breakdown half-life of a pesticide applied to a farmer’s field is 3.50 days, then what is the rate constant for this
1. 1 answer
2. 436 views
In which of the following reactions is ΔE closest in value to ΔH?HNO3(aq) + Na2(CO3)(aq) = NaNO3(aq) + H2O(l) + CO2(g)
1. 2 answers
2. 653 views
Radioactive waste is difficult to dispose of due to the long time periods needed before the radiation effectively disappears.
1. 2 answers
2. 640 views
Suppose 100 moles of a chemical is spilled into a lake. After 15.0 days, the total amount of the chemical in the lake 3.50
1. 2 answers
2. 605 views
The activation energy of a reaction is typically determined by calculating the rate constant for the reaction at two
1. 2 answers
2. 749 views
Based on reaction kinetics, which of the following pairs of reactions and reaction rate equations represent elementary
1. 1 answer
2. 505 views
Two-stroke motor boat engines emit a large amount of partially burned fuel into the water. One of the more common chemicals is
1. 1 answer
2. 419 views
A box and one force vector, F1 is shown. F1 = + 10 N. If the mass of the box is 3 kg, what is the magnitude and direction of a
1. 2 answers
2. 602 views
A particles with mass 3.7 kg moves in the x direction according to the following function: x(t)=−7+4t+3t2−4t3. (the units of
1. 1 answer
2. 464 views
A particle is subject to a time-dependent force: F(t)=5t√. If the particle's mass is 7 kg, what will its velocity be at t=6.7
1. 4 answers
2. 544 views
A 1559-kg car moves at 15.0 m/s. What is the magnitude of the horizontal net force needed to bring the car to a halt in a
1. 1 answer
2. 437 views
Which of the following statements is not true?1.Chemical equilibria are examples of reversible processes. 2.When multiple
1. 2 answers
2. 894 views
How is the reaction quotient used to determine whether a system is at equilibrium?The reaction is at equilibrium when Q > Keq.
1. 3 answers
2. 1,824 views
The pollutant NO is formed in diesel engines. The reaction fixes atmospheric nitrogen with oxygen to form NO. The reaction is:
1. 3 answers
2. 531 views
1) C2H2O4(aq) = H+ (aq) + C2HO4- (aq); Keq = 6.5E-22) C2O42- (aq) + H+ (aq) = C2HO4- (aq); Keq = 1.64E+4 then what is the
1. 3 answers
2. 925 views
Suppose you have the following reaction at equilibrium:N2(g) + 3H2(g) = 2NH3(g), ΔH = −22 kcal/mol What changes are expected
1. 2 answers
2. 1,007 views
The following equilibrium exists in a closed container: N2(g) + O2(g) = 2NO(g), ΔH = +181 kJ/mol. Which of the following
1. 4 answers
2. 845 views

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