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Zach

Questions and answers by Zach, page 2

Questions (251)

"Suppose some sort of clamp is applied to hold an electron fixed at the distance of 2.5 Angstroms from a lithium nucleus Li3+
1. 1 answer
2. 486 views
"Suppose some sort of clamp is applied to hold an electron fixed at the distance of 2.5 Angstroms from a lithium nucleus Li3+
1. 1 answer
2. 468 views
What is the annual interest rate if $1600 is invested for 6yrs. and 456 in intrest is earned
1. 3 answers
2. 1,251 views
What is 5x^2y^-3 over 25x^6y^2 in simplest form
1. 2 answers
2. 755 views
In the sentence: Not only it does affect women and children, but it also affects our society and our future generations. is the
1. 2 answers
2. 544 views
The amount paid to a work crew varies jointly as the number of persons working and the length of time worked. If 5 workers earn
1. 1 answer
2. 369 views
The volume of a given weight of gas varies directly as its absolute temperature t and inversely as its pressure p. If the volume
1. 1 answer
2. 439 views
The intensity of illumination at a given point is directly proportional to the intensity of the light source and inversely
1. 1 answer
2. 947 views
A 10-g bullet is shot vertically into a stationary 8-kg block. The block lifts upward 3.0 mm. The bullet penetrates the block in
1. 2 answers
2. 732 views
I am supposed to choose from pronom indirect (indirect pronouns), and pronom disjoint (stressed pronuons). Naturally, if you had
1. 4 answers
2. 515 views
A(n) ____ reaction is one in which oxygen reacts with another compound to form carbon dioxide, water, and heat.
1. 2 answers
2. 658 views
A ball bounces upward from the ground with a speed of 14 m/s and hits a wall with a speed of 12 m/s. How high above the ground
1. 2 answers
2. 943 views
A 200 g mass is attached to a spring of spring constant k. The spring is compressed 15 cm from its equilibrium value. When
1. 4 answers
2. 1,433 views
A 34-g bullet traveling at 120m/s embeds itself in a wooden block on a smooth surface. The block then slides toward a spring and
1. 1 answer
2. 1,036 views
I have a civics final tomorrw. the question I'm working on is "To Postpone Sentence/Fine" It is a crossword puzzle and the first
1. 1 answer
2. 1,020 views
A rock (m = 1.5 kg) moving at 4.2 m/s north collides with a ball (m = 0.061 kg) that is initially at rest. What is the velocity
1. 3 answers
2. 368 views
When a 1150 kg space rocket lifts off of ground. How many joules of energy has been provided by its engine during the time in
1. 1 answer
2. 371 views
A hydraulic jack is designed so that when the handle is pushed down 1 m, the piston raising the load moves up 0.015 m.IMA= 66.67
1. 1 answer
2. 489 views
Block M (mass of 15.65 kg)is initially moving to the left with a speed of 3.77 m/s. The mass of m is 8.26 kg and the
1. 1 answer
2. 846 views
A ball is thrown up with an initial velocity of 32 feet per second. How many seconds will it take for the ball to return to the
1. 4 answers
2. 1,686 views
A certain dog whistle operates at 23.5 kHz, while another (brand X) operates at an unknown frequency. If neither whistle can be
1. 2 answers
2. 641 views
What is the index of refraction of a liquid in which the speed of light is 2.22 x 108 m/s?
1. 4 answers
2. 1,282 views
Microwaves are electromagnetic waves transmitted at a normal frequency of 2.45 GHz. Find the wavelength of the microwaves.
1. 2 answers
2. 1,160 views
How would I figure out what is produced during a chemical reaction between 0.5 grams of sodium bicarbonate and 3 grams of citric
1. 2 answers
2. 514 views
What is the balanced equation for copper (II) sulfate pentahydrate and potassium oxalate monohydrate?
1. 5 answers
2. 5,494 views
The reaction for my lab isMg(s)+2HCl(aq)--> MgCl2(aq)+H2(g) I need to find the pressure of the hydrogen gas. Initial Pressure =
1. 6 answers
2. 1,222 views
How would I calculate the heat of solution in Joules for dissolving 0.1 mole of NH4NO3 in 100 mL of water?The initial
1. 4 answers
2. 526 views
What is the simple subject of ,Many stories about the first Valentine's Day exist?
1. 5 answers
2. 1,197 views
How would I find the percent of water lost in alum after it has dried for a week?Wet Alum = 13.44g Dry Alum = 11.28g
1. 2 answers
2. 516 views
Melting Point Determinations between urea and trans-cinnamic acid. Q. If urea were a significant base, specifically how would
1. 1 answer
2. 683 views
Explain why the urea in particular, or amides in general, are much weaker bases than amines?
1. 1 answer
2. 269 views
How would I find the volume of 30% hydrogen peroxide solution from 20mL of 3% hydrogen peroxide solution?
1. 4 answers
2. 566 views
I am trying to figure out how to calculate the reaction rate.In my question the reaction rate is: 1/2x molarity of sodium
1. 2 answers
2. 610 views
I titrated 0.25g of soda ash mixed with 25mL of deionized water and it took 43.7mL of hydrochloric acid to complete the
1. 5 answers
2. 593 views
an 88kg cardboard box is being pulled along a level floor. the coefficient of static friction between the box and the floor is
1. 2 answers
2. 543 views
An 8 g bullet is shot into a 4.0 kg block, at rest on a frictionless horizontal surface. The bullet remains lodged in the block.
1. 3 answers
2. 751 views
The products of the reaction between zinc and sulfuric acid are zinc sulfate, hydrogen sulfide, and water. Balance the equation
1. 3 answers
2. 977 views
A mass-spring system has b/m = ω0/2, where b is the damping constant and ω0 the natural frequency. How does its amplitude A
1. 2 answers
2. 1,259 views
Help I need help to find the coordinates of the circumcenter of each triangle. Isosceles triangle CDE with vertices C(0, 6),
1. 2 answers
2. 615 views
I am not sure if I calculated the exact molarity of the potassium permanganate. I multiplied the molarity of the potassium
1. 2 answers
2. 559 views
I am not sure if I calculated the exact molarity of the potassium permanganate. I multiplied the molarity of the potassium
1. 2 answers
2. 1,118 views
Chris cuts a 3 1/2 feet long board of wood. He cuts out 4 pieces that are each 2/3 foot long. Find the combined length of the 4
1. 3 answers
2. 1,064 views
how much heat energy needed to convert 125g ice 27 deg C to 50 deg C
1. 1 answer
2. 378 views
Why is the melting point of a known compound (ex. acetanilide) determined before the melting point of the unknown compound?I
1. 2 answers
2. 543 views
it is a rectangle with a height to length ratio of 2 to 25 . if the window is 24 feet high. how long is it?______ft
1. 7 answers
2. 1,074 views
from a square piece of cardboard with length and width of x inches, a square of width x-1 inches is removed from the center.
1. 1 answer
2. 490 views
I am trying to figure out if I am correct about the solubility of 9-fluorenone in NaOH and diethyl ether and the solubility of
1. 4 answers
2. 3,198 views
How do I find this integral using weierstrass substitution?1/9-4((sinx)^2)
1. 1 answer
2. 441 views
How do I find this integral using weierstrass substitution?1/(9-4((sinx)^2))
1. 1 answer
2. 458 views
A laser beam is being shot through two different materials that have been stuck together. if theta 1 = 65.5 and theta 2 = 49.8
1. 1 answer
2. 465 views
A 15-g sample of radioactive iodine decays in such a way that the mass remaining after t days is given by m(t) =
1. 4 answers
2. 1,772 views
I have 5 tickets for a raffle and I know that the probability of my winning the prize is 0.003. How many tickets were sold
1. 1 answer
2. 445 views
A rubber ball is thrown straight down from a height of 244 feet at speed of 80 feet per second. If the ball always rebounds with
1. 3 answers
2. 651 views
A 17000 kg railroad car travels along on a level frictionless track with a constant speed of 23.0 m/s. A 5100 kg additional load
1. 2 answers
2. 571 views
A tennis ball may leave the racket on a serve by a top player with a speed of 45.0 m/s. If the ball's mass is 0.063 kg, and it
1. 2 answers
2. 780 views
What does the notation 4n = 28 tell you about how many types of chromosomes there are and how many of each type of chromosome
1. 2 answers
2. 777 views
If the largest two-digit number is added to 200, what is the sum?
1. 3 answers
2. 561 views
calculate the molarity of a g NaCl in 250 ml solution.
1. 1 answer
2. 378 views
what is the positive solution of the equation x^2 = 2x + 35? solve by factoring.
1. 2 answers
2. 774 views
what is the positive solution of the equation 5x^2 + 2x -16 =0? solve by factoring.
1. 2 answers
2. 694 views
what is the positive solution of the equation x^2 - 3x = 1? solve by using a table or by graphing. if necessary, round your
1. 3 answers
2. 1,506 views
what is the positive solution of the equation 3x^2 - 5x - 7 =0? solve by using a table or by graphing. if necessary, round your
1. 1 answer
2. 617 views
what is the positive solution of the equation 1/2x^2 -3x =5? solve by using a table or by graphing. if necessary, round your
1. 1 answer
2. 487 views
write each function in vertex form f(x) =-2x^2 =6x + 10
1. 4 answers
2. 752 views
write an equation to solve the problem. find three consecutive even numbers whose sum is 144
1. 4 answers
2. 519 views
solve ax -3x + 5 = a+b for x. state any restrictions on the variables.
1. 1 answer
2. 481 views
write the compound inequality 3.1 less then or equal to m less than or equal 4.7 as an absolute value inequality.
1. 1 answer
2. 746 views
find the slope of each line.a. y= 2x-3 b. 3y=7x =1
1. 1 answer
2. 322 views
what are the x and y intercepts of 2x +4y =8?
1. 1 answer
2. 343 views
suppose y varies directly with x and y=1 when x= -3. what is the constant of variation? what is x when y=4?
1. 3 answers
2. 928 views
find the factored forms of each expression.-9x^2 - 100
1. 3 answers
2. 831 views
A quantity of ice at 0.0 °C was added to 33.6 g of water at 45.0 °C to give water at 0.0 °C. How much ice was added? The heat
1. 3 answers
2. 1,382 views
Draw the Lewis structure for each of these molecules.1. PH3 2. H2S 3. HCl 4. CCl4 5. SiH4
1. 3 answers
2. 1,943 views
A projectile is launched at 5.4 m/s with an initial angle of 22 degrees from an initial height of 2.6 meters. Where will it
1. 2 answers
2. 485 views
find the real solutions of each equation by graphing.2x^4=9x^2-4 15x^4=11x^3 + 14x^2
1. 2 answers
2. 500 views
Solve each equation.x^4 -x=0 x^4-81=0
1. 1 answer
2. 328 views
find the real solutions of each equation by graphing.2x^4=9x^2-4
1. 1 answer
2. 401 views
find the real solutions of each equation by graphing.15x^4=11x^3+14x^2
1. 2 answers
2. 511 views
solve each equation.x^4-81=0
1. 1 answer
2. 360 views
divide using long division.(6x^2+4x-16)/(2x-2)
1. 3 answers
2. 441 views
solvesquare root 2x-5 =7 the 2x -5 is under the sqaure
1. 1 answer
2. 373 views
solvesquare root 5-2x + 5 =12 5-2x under the sqaure
1. 1 answer
2. 376 views
solve3 square root 2x +1 =3 2x +1 under the sqaure
1. 1 answer
2. 347 views
A rectangular garden next to a building is to be fenced on three sides. Fencing for the side parallel to the building costs $60
1. 4 answers
2. 821 views
How many grams of solid ammonium chloride should be added to 1.50 L of a 0.224 M ammonia solution to prepare a buffer with a pH
1. 2 answers
2. 698 views
tim is 27 years older than tom. the sum of their ages is 337. how old is ti,?
1. 1 answer
2. 219 views
Write at least one way that the United States has influenced another nation-state and at least one way that another nation-state
1. 1 answer
2. 423 views
What is one way that the United Nations shapes world affairs
1. 4 answers
2. 1,093 views
What are the differences between mood and tone?
1. 3 answers
2. 492 views
The 1.1 kg physics book is connected by a string to a 250 g coffee cup. The book is given a push up the slope and released with
1. 1 answer
2. 954 views
The reaction of 5.1 grams of fluorine with excess chlorine produced 4.5 grams of ClF3. What percent yield of ClF3 was obtained?
1. 1 answer
2. 728 views
In a perfectly insulating container, what is the equilibrium state (temperature and phases) if one mixes 475 g of water vapor at
1. 1 answer
2. 424 views
Describe circular motion. Which of Newton's laws helped you describe circular motionPlz I need help fast, thx!!
1. 1 answer
2. 452 views
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line.
1. 4 answers
2. 593 views
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line.
1. 4 answers
2. 1,874 views
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line.
1. 2 answers
2. 523 views
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line.
1. 3 answers
2. 748 views
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line.
1. 2 answers
2. 1,138 views
how did the europeans feel about the founding of america
1. 4 answers
2. 344 views
where is the moon when you are in a location experiencing a low tide
1. 7 answers
2. 2,163 views

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