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Zach

Questions (251)

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. 1 answer
2. 1,844 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. 0 answers
2. 508 views
How do I find this integral using weierstrass substitution?1/(9-4((sinx)^2))
1. 0 answers
2. 495 views
How do I find this integral using weierstrass substitution?1/9-4((sinx)^2)
1. 0 answers
2. 475 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. 2 answers
2. 3,271 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. 0 answers
2. 549 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. 6 answers
2. 1,128 views
Why is the melting point of a known compound (ex. acetanilide) determined before the melting point of the unknown compound?I
1. 1 answer
2. 615 views
how much heat energy needed to convert 125g ice 27 deg C to 50 deg C
1. 0 answers
2. 419 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. 2 answers
2. 1,129 views
I am not sure if I calculated the exact molarity of the potassium permanganate. I multiplied the molarity of the potassium
1. 1 answer
2. 1,186 views
I am not sure if I calculated the exact molarity of the potassium permanganate. I multiplied the molarity of the potassium
1. 1 answer
2. 623 views
Help I need help to find the coordinates of the circumcenter of each triangle. Isosceles triangle CDE with vertices C(0, 6),
1. 1 answer
2. 659 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. 1 answer
2. 1,324 views
The products of the reaction between zinc and sulfuric acid are zinc sulfate, hydrogen sulfide, and water. Balance the equation
1. 0 answers
2. 1,084 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. 2 answers
2. 817 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. 1 answer
2. 608 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. 4 answers
2. 656 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. 1 answer
2. 683 views
How would I find the volume of 30% hydrogen peroxide solution from 20mL of 3% hydrogen peroxide solution?
1. 3 answers
2. 630 views
Explain why the urea in particular, or amides in general, are much weaker bases than amines?
1. 0 answers
2. 308 views
Melting Point Determinations between urea and trans-cinnamic acid. Q. If urea were a significant base, specifically how would
1. 0 answers
2. 730 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. 1 answer
2. 568 views
What is the simple subject of ,Many stories about the first Valentine's Day exist?
1. 4 answers
2. 1,265 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. 3 answers
2. 587 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. 5 answers
2. 1,304 views
What is the balanced equation for copper (II) sulfate pentahydrate and potassium oxalate monohydrate?
1. 3 answers
2. 5,576 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. 1 answer
2. 555 views
Microwaves are electromagnetic waves transmitted at a normal frequency of 2.45 GHz. Find the wavelength of the microwaves.
1. 1 answer
2. 1,223 views
What is the index of refraction of a liquid in which the speed of light is 2.22 x 108 m/s?
1. 1 answer
2. 1,326 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. 1 answer
2. 686 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. 1 answer
2. 1,725 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. 0 answers
2. 912 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. 558 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. 429 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. 2 answers
2. 414 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. 0 answers
2. 1,080 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. 0 answers
2. 1,107 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. 2 answers
2. 1,495 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. 1 answer
2. 992 views
A(n) ____ reaction is one in which oxygen reacts with another compound to form carbon dioxide, water, and heat.
1. 1 answer
2. 688 views
I am supposed to choose from pronom indirect (indirect pronouns), and pronom disjoint (stressed pronuons). Naturally, if you had
1. 3 answers
2. 588 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. 1 answer
2. 805 views
The intensity of illumination at a given point is directly proportional to the intensity of the light source and inversely
1. 0 answers
2. 1,012 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. 474 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. 0 answers
2. 404 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. 1 answer
2. 583 views
What is 5x^2y^-3 over 25x^6y^2 in simplest form
1. 1 answer
2. 790 views
What is the annual interest rate if $1600 is invested for 6yrs. and 456 in intrest is earned
1. 2 answers
2. 1,307 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. 0 answers
2. 538 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. 0 answers
2. 533 views
A ball swings in a vertical circle at the end of a rope 1.50 m long. When the ball is 35.9° past the lowest point on its way
1. 3 answers
2. 1,653 views
your aunt gives you a check on your birthday each year. on your first birthday , she gives you a check for one cent. the next
1. 1 answer
2. 899 views
Answer the calculus question about Point P, 45 mph, etc. It is ALREADY posted on here.
1. 2 answers
2. 442 views
If 1/2 moles of 02 react with 24 moles of hydrogen, can 2 moles of water be produced?
1. 1 answer
2. 438 views
A gas at 1.5 atm, 2.3L, and 23degreeC changed to 1.0 atu and 2.8L. What is the new temperature?
1. 1 answer
2. 268 views
Calculate the mass of NaCl produced when 5.50 moles of Sodium reacts with excess chlorine gas.
1. 2 answers
2. 917 views
PLEASE NOTE: Titration requires several steps in order to obtain exact results. The procedures described in this lab assume that
1. 1 answer
2. 1,182 views
3 dice are rolled let (y,r,b) represent each outcome?a- sample space b- prob rolling a sum of 18 c- prob of rolling a sum less
1. 0 answers
2. 533 views
A usted _______gusta jugar a los deportes.What goes in the blank?
1. 2 answers
2. 496 views
The Problem:The spherical top holds a little over 54,000 gallons of water. The base of the top is 60 feet above the ground. The
1. 1 answer
2. 632 views
I need help with the following question.Solve for y: 3x - 2y = 8 + x Please show the steps and the answer, thanks.
1. 1 answer
2. 1,031 views
find the lengths of the sides of a triangle whose perimeter is 37. The measure of the first side of the triangle is 8 less than
1. 3 answers
2. 2,040 views
Please help me solve for the following coefficients. The equation is:2X-Y=4 if X = 0, then Y = ? if Y = 0, then X = ? if X = 1,
1. 1 answer
2. 353 views
Approximate the gravitational force of attraction between a 49.0 kg girl and a 52.0 kg boy if they are sitting 2.5 m apart
1. 1 answer
2. 643 views
A Rectangular Field is to be enclosed by a fence and divided into three parts by another fencer. Find the maximum area that can
1. 0 answers
2. 702 views
I need help with the following problem.-6 less than or equal to 3 + 1/3a less than or equal to 5 Please show steps and answer.
1. 1 answer
2. 442 views
A ball throw at 45 degree angle with an initial speed of 15m/s. the time for the ball to reach its highest point can be found
1. 1 answer
2. 528 views
1/4x - 5/12x = x - 4/3Please show steps and answer. Thanks.
1. 1 answer
2. 334 views
If g(x)= -2^2 and h(x)=x-2/5. Find the indicated value.h(g(5)) I got -5.4. is that right?
1. 0 answers
2. 300 views
(y^4)^1/6
1. 1 answer
2. 255 views
How do you solve this problem?3/5k - (k + 1/3) = 1/15 (k + 3) Please show me the steps. Thanks.
1. 2 answers
2. 491 views
A museum curator moves artifacts into place on many different display surfaces. Use the values in Table 4-2 in the textbook to
1. 1 answer
2. 1,428 views
Are (1/2 x 3) x 8 and 3 x (1/2 x 8) equal? Explain how this can help in finding the area of a triangle
1. 0 answers
2. 300 views
A=1/2bhA= 1/2 ? ? A= 180 what could the base and height be?
1. 3 answers
2. 381 views
How does (1/2 x 3) x 8 and 3 x (1/2 x 8) being equal help in finding the area of a triangle?
1. 0 answers
2. 267 views
Finding the area or a triangleA=1/2bh A= 1/2 x 13.6 x 7
1. 1 answer
2. 366 views
How do I find the area of a triangle?
1. 1 answer
2. 304 views
calculate the number of formula units of 0.0067 g of lithium carbonate, Li2CO3?
1. 1 answer
2. 1,055 views
How many grams of potassium can be obtained from the decompostion of 100 grams of KCl?
1. 1 answer
2. 628 views
How much iron can be recovered from 25.0 grams of FeO?
1. 1 answer
2. 1,753 views
In order for conduction to occur particles must make what?
1. 0 answers
2. 728 views
I have one problem I just can't figure out, A machine in an ice factory is capable of exerting 3.30 * 10^2 N of force to pull
1. 1 answer
2. 3,291 views
Is this a star polygon, a polygon, or other, how many sides does it have?{9/3}
1. 0 answers
2. 392 views
A roulette wheel has 18 red slots and 18 black slots numbered alternaetly with the numbers 1 through 36. Two green slots are
1. 1 answer
2. 1,163 views
When a survey of 800 people was done, 55% of those surveyed said they ate candy, 65% said they ate chips and 90% said they ate
1. 1 answer
2. 554 views
20 divided 2 minus 24 divided by 3 equals ? No parenthesis
1. 1 answer
2. 505 views
The side lengths of a right triangle are each an integral number of units. If one of the legs is 13 units, what is the perimeter
1. 2 answers
2. 684 views
Six pipes each having a radius of 0.5 feet are stacked in a triangular pile with three pipes on the ground tangent to each
1. 3 answers
2. 966 views
A large tank contains 400-kg mixture of water and alcohol. The mixture is 64% alcohol by weight. At each step, 100 kg of the
1. 2 answers
2. 569 views
How many positive three-digit integers have the property that the tens digit is greater than or equal to the hundreds digit and
1. 2 answers
2. 1,217 views
I don't get it, so the four influences that Greece had on Roman culture are art, religion, mythology, and the Latin alphabet?
1. 4 answers
2. 1,300 views
What four influences did Greece had on Roman culture?
1. 1 answer
2. 491 views
1) The concentration of the aluminum ion in a test solution is 0.10M. Using the Ksp for aluminum hydroxide (3. x 10^-34),
1. 3 answers
2. 1,335 views
The rectangular prism has a height of 28 cm and holds exactly 360cm cubed. What is the length and width using the formula lwh?
1. 2 answers
2. 457 views
If the yield from the reaction of acetic acid with isopentyl alcohol is 45% how many grams of isopentyl acetate are formed from
1. 1 answer
2. 1,463 views
simplify -x/4/6/x
1. 0 answers
2. 304 views
simplify -x/4/6/x
1. 1 answer
2. 283 views
The radius of a circle is increased by 85%. How much will the area increase in percent? Round your answer to the nearest tenth
1. 1 answer
2. 716 views
need help thank-you translate the verbal phrase into an inequality, then solve the inequality and graph your solution, the
1. 2 answers
2. 851 views

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