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luke
Questions and answers by visitors named
luke
Questions (151)
What evolves during natural selection?(1 point)
entire species the proportion of different traits in a population the phenotypes
10 answers
2,084 views
How can a reader determine the meaning of a poem?(1 point)
Responses by choosing a point-of-view by choosing a point-of-view by
7 answers
425 views
How does the boldness Odysseus shows in the Cyclops’s cave drive subsequent plot events?
A)Several of Odysseus’s men are
13 answers
6,032 views
A 35-kg trunk is dragged 10 m up a ramp inclined at an angle of 12º to the
horizontal by a force of 90 N applied at an angle of
4 answers
878 views
consider a sequence of independent tosses of a biased coin at times k=0,1,2,…,n. On each toss, the probability of Heads is p,
5 answers
8,800 views
Which of the following is a simple sentence?(1 point)
Responses He bakes many kinds of bread. He bakes many kinds of bread. He
5 answers
229 views
This graph contains information related to An Inconvenient Truth. Use the graph to answer the question . The y axis is titled,
1 answer
29 views
what is the relationship between ka and kb?
Kw=ka*kb
1 answer
308 views
what does coefficients in equations mean, in chemical terms?
2NaCl means we have two molecules or 2 mols of NaCl. Most texts
1 answer
502 views
A rational function that passes through (0,0) and (4, 8/7) has the x-axis as a horiztonal asympotote. It also has 2 vertical
1 answer
897 views
A rational function that passes through (0,0) and (4, 8/7) has the x-axis as a horiztonal asympotote. It also has 2 vertical
1 answer
1,104 views
A rational function that passes through (0,0) and (4, 8/7) has the x-axis as a horiztonal asympotote. It also has 2 vertical
1 answer
799 views
I'm not good at math! I need help with finding a decimal from a fraction.
like 1/3, 13/15, 19/32 I can't figure out how to turn
1 answer
916 views
hi i was reading through the tutorials and havent really understood how to factor out a trinomial like
12x^4 - 5x^2y^2 - 2y^4
1 answer
363 views
I have no clue how to do this as no values were given and im confused. can someone explain plz?
if x^3-y^3=m and x-y=N, express
1 answer
423 views
hi how would we solve a question like this?
for the curve with eq'n 2x^2 - x - 1 y= _______________ x^2 - 2x - 3 determina all x-
1 answer
345 views
in a series of stamps annie must buy six of each
one cost $4.00 one cost $2.50 one cost $1.20 one cost $1.00 she had to post a
4 answers
752 views
for part 2 of the questions is it six $1.00 stamps + one $2.50 + one $1.20 and four $4.00
and how do i find the largest number of
3 answers
413 views
can you give me more info for 9/11 (patriot day)?
5 answers
355 views
The force of ..... acts to transfer mechanical energy to thermal energy.
4 answers
446 views
a metal sample weighing 45.0g and at a temperature of 99.1C was place in 38.6g of water in a calorimeter at 25.0C. the
4 answers
1,366 views
consider the following function:
f(x)=sqrt(50-x) find the linear approximation of f(x) at a=1
1 answer
420 views
the rainfall this year was 18.6 cm. this is 3.2 cm less than half of the rainfall last year. what was the rainfall last year?
4 answers
995 views
a remote controlled car's wheel accelerates at 22.4 rad/s^2. if the wheel begins with an angular speed of 10.8 rad/s what is the
4 answers
5,163 views
Latitude lines measure distance in degrees north and south of this?
is it equator?
4 answers
704 views
Write the correct conjugation of tener for the following sentences:
9. ¿Por qué _________ (Jose) sueño por la mañana? 10. Mi
2 answers
684 views
PLease look down. Thank you.
1 answer
238 views
which metal does not require having its charge specified in the names of ionic comppounds it forms?
a. Au b. Ca c. Cu d. Cr e. Fe
2 answers
489 views
A firm has production of cars in 2 countries with the following demand:
Sweden: P= 300- 5Q Denmark: P= 150- 3Q Marginal cost for
1 answer
1,045 views
How do you say the restaurant is located inside the hotel. れすとらんはほてるのなかです
3 answers
376 views
i need to do a poster to advertise a 'new' mobile phone it needs to stand out to the people who see it
1 answer
448 views
Consider a frictionless track as shown in Figure P6.48. A block of mass m1 = 4.30 kg is released from A. It makes a head on
2 answers
770 views
what are the changes to n02 levels in one day
1 answer
322 views
Assume that the weight loss for the first two months of a diet program has a uniform distribution over the interval 6 to 12
2 answers
923 views
the points are (2.1, -6.3) (-2.5, 4.7)
y=mx+b find what m= and what b =
3 answers
290 views
the points are (2.1, -6.3) (-2.5, 4.7)
y=mx+b find what m= and what b = i got m=-2.39 but the I tried to plug the coordinates
1 answer
279 views
How do find the speed of a marble after falling from rest a distance of 1.2 m?
1 answer
1,004 views
what is the vertex and axis of symmetry
y=2x^2 - 7x + 1
3 answers
773 views
A spy in a speed boat is being chased down a river by government officials in a faster craft. just as the officials' boat pulls
4 answers
1,213 views
A shell fired from the ground with an initial speed of 1.70 x 10^3 m/s at an initial angle of 55 degrees to the horizontal.
4 answers
1,441 views
if a ball, fired as a projectile, travels 30 meters when it leaves the the ground at 20% angel, it will travel the same distance
1 answer
417 views
if a ball, fired as a projectile, travels 30 meters when it leaves the the ground at 20% angel, it will travel the same distance
2 answers
686 views
True or false: dimensions for Q can be, for example, cubic feet per minute, being distinguished from units for Q, which are
1 answer
356 views
what accounting principle would changing methods every year violate?
1 answer
452 views
please help i cannot figure this out
A 0.27 kg ball of dough is thrown straight up into the air with an initial velocity of 12
1 answer
510 views
what is the correct order from least to greatest: 3/8,0.23, 35%
3 answers
444 views
A pulley system is 76% efficient. If a 9000 kg box is lifted a distance of 8 m by a force of 700 N, how much rope is pulled from
1 answer
407 views
Aqueous solutions of iron (III) sulphate and barium hydroxide are combined. Does a precipitate form? If yes write a net ionic
3 answers
1,818 views
FeSO4 (aq) + Ba(OH)2 (aq) = BaSO4 (s) + Fe(OH)2 (s)
2Fe3+(aq) + 3SO4=(aq) + 3Ba2+(aq) + 6OH-(aq) ===> 2Fe(OH)3(s) + 3BaSO4(s)
2 answers
848 views
One of your aliens looks down and becomes very confused, so you tell him that there is a game going on
1 answer
258 views
Critical thinking: alien tour guide
1 answer
454 views
What happens to the concentration of
NO(g) when the total pressure on the equilibrium reaction 3NO2(g) + H2O <---> 2HNO3(aq) +
3 answers
647 views
Consider the combustion of glucose:
C6H12O6(s) + 6O2(g) <---> 6CO2(g) + 6H2O(g) H = −3 kJ/mol Which condition I) Adding more
4 answers
888 views
Consider the reaction at equilibrium:
2NO2(g) <---> N2O2(g) + O2(g) for which, H = −20.4 kJ · mol−1. If you decrease the
5 answers
638 views
What happens to the concentration of
SO2(g) when the total pressure on the equilibrium reaction 2 SO2(g) + O2(g) <---> 2 SO3(g)
4 answers
1,606 views
How many molecules are in 12.2 g NO2?
Answer in units of molec
4 answers
1,225 views
Determine the mass of 7.79 ×1023 atoms Cl.
Answer in units of g
3 answers
740 views
A sample of hydrogen gas occupies 16.8 L at STP. How many moles of the gas are present?
Answer in units of mol
2 answers
887 views
At 119 degrees C, the pressure of a sample of nitrogen is 1.94 atm. What will the pressure be at 282 degrees C, assuming
4 answers
456 views
How many molecules are in 1.60 g of SO2?
Answer in units of molec
3 answers
786 views
At STP, what is the volume of 8.38 mol of
nitrogen gas? Answer in units of L
2 answers
472 views
What is the volume of
2.8 × 10^6 molecules He? Answer in units of L
4 answers
500 views
How many molecules are in 1.60 g of SO2?
Answer in units of molec
2 answers
841 views
Which statement is wrong?
1. Adding the same amount of heat to two different objects will produce the same increase in
3 answers
2,947 views
A mass of 7 kg of water is raised from 8 degrees C to the boiling point 100 degrees C.
How much heat is required? The specific
2 answers
489 views
convert a pressure of 1.75 atm to kpa
1 answer
450 views
convert a pressure of 1.75 atm to kpa
2 answers
736 views
Consider the system
2N2O5(g) <----> 2N2O4(g) + O2(g) + heat at equilibrium at 25�C. If the temperature were raised would the
4 answers
522 views
How many liters are occupied by 1.05 mol of nitrogen at 198�C and 0.564 atm pressure?
Answer in units of L
3 answers
1,001 views
A sample of gas in a closed container at a
temperature of 83�C and a pressure of 9 atm is heated to 259�C. What pressure does the
4 answers
572 views
Do you buy James Madison's argument in Federalist 10 and Federalist 51 that separating powers among various inter-connected
4 answers
525 views
A mass of 350 kg is lifted by 2 cables connecting at the same point as
shown. Determine the tensions in each cable when the
1 answer
384 views
what is the unit rate for 22 gallons of gas to go 682 miles
2 answers
544 views
how much is 2/3rd of a cup of sugar when it is .36 a cup?
1 answer
284 views
Consider
Ba (NO₃)₂ + K₂SO₄ → BaSO₄ + 2KNO₃ (0.10 M) (0.10 M) (10.0 mL) (20.0 mL) Will the K₂SO₄ be sufficient
2 answers
550 views
The second poem I will write about is ‘the conscript’ it was written by Wilfred Gibson in 1917. a law was passed to force
5 answers
1,682 views
All deal with a random variable X that follows a normal probability distribution with mean equal to 37 and a standard deviation
1 answer
504 views
All deal with a random variable X that follows a normal probability distribution with mean equal to 37 and a standard deviation
3 answers
541 views
The percent of fat calories that a person in America consumes each day is normally distributed with a mean of 36 and a standard
2 answers
1,438 views
A 4.3 g mass is released from rest at C which has a height of 0.8 m above the base of a loop-the-loop and a radius of 0.31 m.
4 answers
945 views
Need Help Please..!!!
During the Victorian period, there were many social changes and intellectual developments. As a result, a
2 answers
779 views
How does Voltaire give examples in his book Candide that governments need to have both shepherds and butchers
1 answer
311 views
what is the answer to the math pizzazz E-30?
What is the title?
15 answers
8,296 views
which poem has the rhyme scheme AA BB CC
4 answers
467 views
Five cards are drawn from a standard deck, what is the probability of picking 3 face cards?
1 answer
411 views
Five cards are drawn from a standard deck, what is the probability of picking 3 face cards?
3 answers
821 views
5.6 lb/gal = oz/gal
4 answers
1,630 views
find 3 consecutive integers such that the sum of the squares of the first and second is 2 more than the third
1 answer
418 views
Which physical properties are characteristics of metals? Choose all that apply.
-brittle -high luster -malleable -ductile -not
4 answers
4,167 views
If y varies directly as the square root of x and y = 47 when x = 49, find y if x = 2401. (Round off your answer to the nearest
4 answers
1,417 views
Define terms:
- clinical conditions - pathological conditions - physiological conditions These terms have me confused..
1 answer
480 views
Which expression shows 27 + 36 as the product of their greatest common factor and the sum of two whole numbers with no common
4 answers
1,011 views
A solution of aqueous ammonia contains 28.0% NH3 by mass. the solution has a density of 0.898g/mL. calculate the volume of this
1 answer
661 views
A concert arena has 48 rows, each with 8 seats and another 54 rows, each with 9 seats.
How many seats does the concert arena
1 answer
378 views
use diagram and text to explain how junction diode is able to conduct an electric current in one direction. use each of the
1 answer
446 views
a spinner wheel with 3 color choices red, blue, and yellow) is spun and a 4 sided die I rolled. list the possible outcomes
7 answers
3,944 views
Upon reaching a speed of 215 km/h on the runway, a jet raises its nose to an
angle of 18º with the horizontal and begins to lift
3 answers
799 views
Find any vector w that is perpendicular to both u = 3j + 4k and v = 2i.
i, j, k are basis vectors. Textbook answer: (0,4,-3) My
5 answers
1,686 views
Express the unit vectors iˆ, jˆ, and kˆ as ordered triples and show that:
a) iˆ x� jˆ = �kˆ b) kˆ x� jˆ� = -�iˆ To
3 answers
2,395 views
Suppose that the microwave radiation has a wavelength of 12 cm . How many photons are required to heat 295 mL of coffee from
3 answers
1,540 views
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