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8TH GRADE - UNIT 2 - LESSON 4Name the solid according to its description: The figure has two bases that are parallel congruent
1. 1 answer
2. 151 views
I was practicing my problem-solving and was a bit confused as to why I supposedly got a wrong answer. Below is what I was
1. 0 answers
2. 299 views
I need help with the age of Jackson and westward expansion unit test my grades are falling behind so it would be greatly
1. 1 answer
2. 761 views
Is it normal for people to be ignored or people rude to you when you ask for help????
1. 4 answers
2. 256 views
Let L = {a, b}. For the language below, give an example of a string in the language, and a string not in the language.{w is in
1. 0 answers
2. 435 views
"Decide whether the following relations on Z is an equivalence relation or not. If it is, describe the partition (i.e. the
1. 1 answer
2. 454 views
Marcus wants to use a model to determine the difference -8 -3 (+3). He starts with 8 negative counters.He wants to add 3
1. 4 answers
2. 1,806 views
If two quantities are directly, which must be true of a graph showing relationships between them? Select all that apply.A. The
1. 2 answers
2. 920 views
Given any Cartesian coordinates, (x,y), there are polar coordinates (r, theta) with -pi/2 < theta <= pi/2. Find polar
1. 1 answer
2. 841 views
Fractional Rates Unit Test
1. 7 answers
2. 114 views
How can I tell a negative binary number from a positive one? More specifically, what exactly is the difference?For example, the
1. 2 answers
2. 535 views
Run serially, portion A of program P consumes 33 s, while portion Bconsumes 925 s. On a parallel computer, moderately serial
1. 0 answers
2. 441 views
Let's say I have the following:(a/b) = (c/d)^(k-1) If I know c, d, and k, then a/b can be calculated easily. But what if c/d was
1. 1 answer
2. 342 views
Why do I see some sources define the work on a spring as W = (1/2)(k)(xf^2 - xi^2) and some sources define it as W =
1. 3 answers
2. 546 views
Prove that a^3 ≡ a (mod 3) for every positive integer a.What I did: Assume a^3 ≡ a (mod 3) is true for every positive
1. 1 answer
2. 3,433 views
For java programming, what is the difference between read() and next()?For example: Let's say I import the java Scanner class.
1. 1 answer
2. 453 views
Let a, b, and m be integers, and m ≥ 2. Prove that:ab ≡ [ (a mod m) · (b mod m) ] (mod m). So I tried proof by cases:
1. 1 answer
2. 750 views
Let f be a function from R to R defined by f(x) = x^2. Find f^–1({x | 0 < x < 1}).So I found the inverse of f(x): f^-1(x) =
1. 2 answers
2. 917 views
Let g: A -> B and f: B -> C be functions. Let f ∘ g be onto. Is both f and g necessarily onto?I think that if f ∘ g is onto,
1. 0 answers
2. 427 views
If the aggregate expenditure is greater than the actual GDP, that would lead to an increase in unplanned inventories and a
1. 0 answers
2. 454 views
Let's say I am given a table of information for the values of the real GDP, consumption, investment, exports, and imports. There
1. 0 answers
2. 547 views
One of the De Morgan's laws states ¬(p ∧ q) ≡ ¬p ∨ ¬q . Does that also apply to three propositions p, q, and r for
1. 1 answer
2. 399 views
Suppose the domain of the propositional function P(x, y) consists of pairs x and y, where x = 1, 2, or 3, and y = 1, 2, or 3.
1. 0 answers
2. 3,625 views
Suppose the domain of the propositional function P(x,y) consists of pairs x and y, where x = 1, 2, or 3, and y = 1, 2, or 3.
1. 0 answers
2. 916 views
Let n be a natural number. If n is divisible by 9, that is neither a necessary nor sufficient condition for n being divisible by
1. 1 answer
2. 750 views
Calculating the unemployment rate given the labor force and the number of people unemployed:Unemployment rate = number of people
1. 1 answer
2. 604 views
If the GDP deflator increased by 3 percent while nominal GDP grew by 5 percent:a) real GDP would grow by 2 percent. b) real GDP
1. 0 answers
2. 1,055 views
A plane leaves an airport A (38.5N, 37.05W) and flies dues North to a point B on latitude 52N(a) Find the distance covered by
1. 1 answer
2. 1,016 views
The point A is directly below a window. Another point B is 15 m from A and at the same horizontal level. From B angle of
1. 1 answer
2. 603 views
There are two signposts A and B on the edge of the road. A is 400 m to the west of b. A tree is on a bearing of 060 degree from
1. 1 answer
2. 976 views
The position of two towns X and Y are given to the nearest degree as X(45° N, 10° W) and Y (45 N°, 70° W).Find 70-10 =60
1. 1 answer
2. 507 views
Does anybody know the critical density for nuclear fusion within the disk of the solar nebula? This is related to the formation
1. 0 answers
2. 461 views
Physical Developer (PD) is a set of solutions used to develop latent fingerprints on different porous and nonporous surfaces. It
1. 2 answers
2. 833 views
Many satellites orbit the earth at about 1000km above the earth's surface. Geosynchronous satellites orbit a distance of
1. 2 answers
2. 1,280 views
Lead(II) chromate (PbCrO4) is used as a yellow pigment to designate traffic lanes, but has been banned from house paint because
1. 1 answer
2. 1,788 views
Nitroglycerin, C3H5(NO3)3, a solid explosive compound, decomposes to carbon dioxide, water vapor, nitrogen, and oxygen. (a)
1. 2 answers
2. 5,511 views
A street merchant is trying to sell you a 14 karat (24 karat is 100% pure) bracelet for $450. The gold is alloyed with copper.
1. 2 answers
2. 1,435 views
What point on the x-y plane does theta = 0 describe?I tried doing: tan(theta) = y/x tan(0rad) = y/x 0 = y/x So y is definitely
1. 1 answer
2. 547 views
An electron is accelerated from rest through a potential difference of 1.40*10^5 V. What is its speed?So there were also two
1. 3 answers
2. 1,010 views
For a rectangular metal surface with dimensions 5 cm by 3 cm, the threshold wavelength for the photoelectric emission of
1. 1 answer
2. 803 views
Is one of the formulas used in "thin film" interference problems 2t = (m + 0.5)(lambda/n_film) OR 2t = (m - 0.5)(lambda/n_film),
1. 3 answers
2. 534 views
A cord has two sections with linear densities of 0.10 kg/m and 0.20 kg/m respectively. An incident wave, y(x,t) = 0.050sin(6.0x
1. 2 answers
2. 3,413 views
The PV diagram shows the compression of 44.1 moles of an ideal monoatomic gas from state A to state B. Calculate Q, the heat
1. 0 answers
2. 479 views
A ping pong ball of mass m = 4.9 gram is precisely measured in position to an accuracy of 10^-10 m. What must be the uncertainty
1. 2 answers
2. 1,185 views
In a setup/situation involving buoyancy, let's say there are two blocks, where one is of styrofoam and the other is aluminum,
1. 0 answers
2. 534 views
A sphere of mass of m = 1.69 kg is first placed directly on the plate of an electronic scale. The scale shows 16.58 N as the
1. 1 answer
2. 545 views
A sphere of mass of m = 1.69 kg is first placed directly on the plate of an electronic scale. The scale shows 16.58 N as the
1. 0 answers
2. 532 views
An anti-hydrogen atom is made using an antiproton and a positron. The spectral lines corresponding to the energy transitions of
1. 1 answer
2. 548 views
A helium balloon (mass including fill gas 2.1 g) is tied to a long string (mass per unit length is 3.1*10^2 g/cm, i.e., one cm
1. 0 answers
2. 536 views
A set of narrow vertical slits is located a distance D from a screen. All the slits have the same width, equal to 35.1 μm. The
1. 0 answers
2. 1,535 views
Link to image relevant to this problem (Add a dot after "1h3" and "googleusercontent" ->
1. 3 answers
2. 563 views
A single vertical slit of width 24000 nm is located 2.10 m from a screen. The intensity pattern below is observed. The distances
1. 4 answers
2. 2,109 views
A square aluminum plate (volume mass ρ = 2700 kg/m^3) has dimension L = 4.8 m and e = 0.9 m. A cylinder of radius R = 1.5 m and
1. 1 answer
2. 654 views
A long thin rod lies along the x-axis from the origin to x=L, with L= 0.830 m. The mass per unit length, lambda (in kg/m) varies
1. 4 answers
2. 1,075 views
A long thin rod lies along the x-axis from the origin to x=L, with L= 0.830 m. The mass per unit length, $\lambda$ (in kg/m)
1. 3 answers
2. 689 views
A square aluminum plate (volume mass ρ = 2700 kg/m^3) has dimension L = 4.8 m and e = 0.9 m. A cylinder of radius R = 1.5 m and
1. 0 answers
2. 1,032 views
In the case of having two plates of a capacitor, in the formula for capacitance C = (Epsilon)(A/d), is A the sum of the areas of
1. 0 answers
2. 389 views
Four copper wires of equal length L are connected to a 100V source. Their cross-sectional area are 1cm^2, 2cm^2, 3cm^2, and
1. 1 answer
2. 1,005 views
Two equipotential surfaces are shown. If Va = -5V and Vb = -15V, find the work needed to move a -2μC charge from A to B along
1. 2 answers
2. 509 views
A 2μC charge is positioned at x = -0.8m and another 2μC charge is positioned at x = 0.8m. A positive test charge of q =
1. 1 answer
2. 759 views
An electron moving in the + x-direction has an initial speed of 3.7*10^6 m/s at the origin. Its speed is reduced to 1.4*10^5 m/s
1. 1 answer
2. 2,448 views
A big toy school bus rear-ends a small toy school bus initially at rest. The bigger bus is several times heavier than the
1. 0 answers
2. 1,654 views
A Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of
1. 2 answers
2. 958 views
Find the function with derivative f′(x)=e^(9x) that passes through the point P=(0,4/9).
1. 1 answer
2. 2,717 views
Express the function f(x) = 1/x+1 in the form goh. If h(x) = x+1, find the function g(x).
1. 1 answer
2. 1,434 views
NASA wants to build a centrifuge to train its astronauts to handle the strong accelerations they will experience when the space
1. 2 answers
2. 524 views
What is the maximum mass of a rubber block that can be pulled by a rope whose maximum tension is 3500N? The block is sitting on
1. 1 answer
2. 498 views
Verify/prove the following:(sinA+tanA)/(1+secA) = sinA ______________________________ tanu = 1+sinu-cos^2u/cosu(1+sinu)
1. 1 answer
2. 715 views
Verify/prove that:(cotA+cotB)/(tanA+tanB)+(1-cotAcotB)/(1-tanAtanB) = 0
1. 2 answers
2. 928 views
Verify/prove that:sinAcosA/1-cosA = sin^2/tanA-sinA
1. 1 answer
2. 642 views
Write base-ten number for five hundred seventy-two
1. 2 answers
2. 2,189 views
(2,-9)(3,2) and (3,-9) find the area of the triangle
1. 2 answers
2. 389 views
Find (sinϴ + cosϴ) if the terminal side of ϴ passes through (5,2)
1. 1 answer
2. 588 views
Two calorimeters each contain 1.4L of water and have a temperature of 26°CIn the first calorimeter, you burn a sample of candle
1. 0 answers
2. 656 views
Calculate the quantity of heat gained or lost in the following change:0.44 mol of water evaporates at 100 degrees Celsius - So
1. 1 answer
2. 1,423 views
Could you please explain why lne^2 = 2, e^lne^2 = e^2, e^lin2 = 2, and lne^e = e ? Thank you.
1. 1 answer
2. 529 views
Write the following expression as a single logarithm: 4ln2x + ln(6/x) - 2ln2xSo I did... 4ln2x + ln(6/x) - 2ln2x = ln2x^4 +
1. 1 answer
2. 852 views
An ice cube at 0 degrees Celsius is placed in a pouch and dropped into 30.0g of water in a cup at 45 degrees Celsius. The ice
1. 2 answers
2. 804 views
If 13.4 kJ of energy are added to 1.00 kg of ice at 0 degrees Celsius, how much water at 0 degrees Celsius is produced? How much
1. 2 answers
2. 1,858 views
Could you please verify and calculate the following logarithmic equation:y = 2log_2(2)(x+2)-4 , in which x=2. So the equation
1. 4 answers
2. 488 views
Is there a difference between heating 50 mL of water to a given temperature, and heating 100 mL of water to the same given
1. 3 answers
2. 485 views
Does anybody know what the following French expression means: "Je changeais de plan de carrière comme on change de
1. 1 answer
2. 458 views
Two light rays, one red and one violet, encounter a glass surface. If the index of refraction of the red light ray = 1.52, the
1. 0 answers
2. 907 views
If a scuba diver is underwater and looks up, he or she will see a round "hole" directly above him or her at the surface of the
1. 1 answer
2. 525 views
Does total internal reflection in an aquarium occur at the separation of the water and the glass or at the boundary of the glass
1. 1 answer
2. 527 views
Check answer PLEASE!!Kevin wants to calculate the value of the expression below. -17 + 3 Which shows an equivalent way kevin
1. 3 answers
2. 981 views
what is the mass in grams of 1.32 x 10^20 uranium atoms
1. 3 answers
2. 2,221 views
Given log 3= x and log 5 =y Express radical 3/5 in terms of x and y.1) 1/2x-y 2) 1/2(x-y) 3) 1/2xy 4) 2(x-y)
1. 1 answer
2. 810 views
A wave geneerantor produces 16.0 pulses in 4.00s .What is the frequence ?
1. 2 answers
2. 1,099 views

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