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Luis
Questions and answers by visitors named
Luis
Questions (160)
A typical volume of a modern hot air balloon is 2500 cubic metres, and a typical maximum temperature of the hot air is 120
5 answers
asked by
Luis
7,382 views
The minute hand of a clock is 6in long. Starting from noon, how fast is the area of the sector swept by the minute hand
5 answers
5,524 views
a thimble is 32.0 cm from a spherical concave mirror. The focal point lenght of the mirror is 11.0 cm. What is the image
4 answers
2,777 views
Complete and balance each of the following equations. K2SO4(aq)+BaBr2(aq)→
Would it be K2SO4(aq)+BaBr2(aq)→K2Br2 +SO4Ba?
7 answers
8,096 views
You have two gas-filled balloons, one containing He and the other containing H2. The H2 balloon is twice the size of the He
3 answers
959 views
. State whether each of the following samples of matter is a gas. If there is not enough information for you to decide, write
1 answer
591 views
A rental cas cost a minimun charge plus a fixed chrger per mile drive. One customer drove 280 miles and paid (0$. Write an
1 answer
385 views
The population, P (in 100's), of a town can be modeled y P = 2 /t -5/ = 6, where t = 0 represents 1990. During whuch two years
1 answer
404 views
Did you hear about ... It's a novel
1 answer
280 views
Would someone please check my work. Thank you.
Rewrite each sentence in an active voice 1) Mistakes were made. A)He made
2 answers
904 views
if a spinning amusement-park ride has an angular speed of 1.2 rad/s, what is the centripetal acceleration of a person standing
3 answers
774 views
what is 44q to the power of -30?
1 answer
159 views
An inverted cone has a diameter of 42 in and a height of 15in. If the water flowing out of the container is 35pi in^3/sec , how
3 answers
421 views
A 6ft tall woman is walking away from a srteet lamp at 4 ft/sec that is 24ft tall. How fast is the length of her shadow
4 answers
1,396 views
The voltage,V, in an electrical unit is related to the current,I, and the resistance,R, by the equation V=IR. The current is
5 answers
4,985 views
Express the following in Sigma notation
2+8+18+32+50+72
4 answers
3,673 views
Express the following in Sigma notation
2+8+18+32+50+72
2 answers
954 views
the observing method in marketing research
1 answer
406 views
would it be possible to view your body from head-to-toe, while standing in front of a plane mirror that is only as tall as you?
2 answers
485 views
My son has a homework (Kindergarden) where he has numbers and next to it there are five square frames. The numbers are 3 and 4.
3 answers
498 views
My son has a homework (Kindergarden) where he has numbers and next to it there are five square frames. The numbers are 3 and 4.
2 answers
548 views
A baseball is thrown at an angle of 25 degrees relative to the ground at a speed of 23.0 m/s. If the ball was caught 42.0 m from
3 answers
2,752 views
Why does the Average Physical Product curve slope downwards so soon?
1 answer
266 views
2.-The longest one-word name of any place in America is Chargoggagoggmanchauggagoggchubunagungamaugg.This name for a lake near
6 answers
1,163 views
d:
2 2 3 4 10 5 3 x y x x z z − − +
1 answer
247 views
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at
2 answers
574 views
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at
2 answers
578 views
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at
2 answers
919 views
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45º
2 answers
504 views
two binary stars moving in a perfect circle orbit
The stars have the same mass, the distance between them is one billion km
2 answers
532 views
Water is lifted out of a well 25.0 m deep by a motor rated at 1.50 hp.
Assuming efficiency 90%, how many kilograms of water can
2 answers
508 views
A vertical spring with a force constant of 250 N/m is compressed 7.5 cm and a 0.30 kg ball placed on top. The spring is released
1 answer
421 views
Two identical springs (neglect their masses) are used to “play catch” with a small block of mass 200 g (see the figure).
Spri
2 answers
578 views
Two identical springs (neglect their masses) are used to “play catch” with a small block of mass 200 g (see the figure).
Spri
1 answer
445 views
A string is tied to a 4.4 kg block and a 120 g hanging bucket. students add 20 g washers one at a time to the bucket. the
4 answers
1,931 views
By looking at the chemical structures of acetaminophen, aspirin, caffeine, ibuprofen, and naproxin sodium, how are you able to
2 answers
571 views
solve equation exactly over interval (0, 2ð)
sin(x)= 1-2sin^2(x)
1 answer
439 views
Hello,
I am asking for these to be reviewed. I do not want answers; I just want to know if these answers look good. If you would
2 answers
696 views
Can anyone help me with these. I need to
eliminate unnecessary shifts in tense, mood, voice, or person. 1)The greed of the
2 answers
529 views
I need to double check my work please.
Revise to create pronoun-antecedent agreement and eliminate the generic he and any awkward
3 answers
618 views
Can anyone help me check my work please. I need to revise the paragraph to establish a clear antecedent for every pronoun that
2 answers
682 views
Would someone please check my work. I need to combine the following sentences into one by using a semicolon.
1)Abalone fishing in
5 answers
774 views
I need to make sure I understand this. I need to rewrite each sentence twice, once as a periodic sentence and once as a
6 answers
668 views
When 3.00 g potassium carbonate (K2CO3 ) was mixed with 20.0 mL of hydrochloric acid (HCl, 4.0M) in a calorimeter, the
2 answers
584 views
Currently in school we're learning about proving identities and for extra credit I got this problem.
cosB= -8/17 in quad II and I
1 answer
484 views
2. We ultimately want to find the amount of solar energy that hits the observer on the planet. Energy is usually measured in
3 answers
582 views
3. Now wait until the planet is at the summer solstice (to the far left). Here the sunlight arrives perpendicular to the
1 answer
397 views
Now let us consider the length of time that the Sun is visible. Wait until the planet is at the summer solstice (12:00am). a)
3 answers
426 views
5. Now, wait until the planet is at the winter solstice (12:00am). a) How many hours of daylight are there on the winter
1 answer
441 views
Before continuing we need a little more information about the angle factor given in the formula above. It turns out that the
1 answer
439 views
How can we describe some object in astronomy?
How can we interpret data? Can we either prove or disprove a hypothesis? If not,
1 answer
320 views
How can we describe some object in astronomy?
Can we either prove or disprove a hypothesis? If not, what can we do? How have
1 answer
330 views
big bang theory define
3 answers
942 views
Calculate the average speed of an oxygen molecule (with a mass of 5.3e-26 kg) at room temperature (300 Kelvin)show your work
1 answer
468 views
While surface conditions differ greatly, name the three ways that Venus and Earth are indeed sister planets.
2 answers
992 views
The tidal interaction between the Earth and the Moon has caused:
1 answer
293 views
You must show your work for full credit.) Calculate the average speed of an oxygen molecule (with a mass of 5.3e-26 kg) at room
1 answer
381 views
A battery has an internal resistance of 0.42. A number of identical light bulbs, each with a resistance of 31.500, are connected
2 answers
608 views
A beam of protons is moving toward a target in a particle accelerator. This
im trying to study for my exam by doing problems,
3 answers
1,540 views
Arrange the different types of forces in order of increasing energy. Covalent, Hydrogen
Bonding, Ion-Dipole, Dipole-Dipole,
2 answers
658 views
operational planning sets up work schedules, routine work procedures, and timetable
1 answer
299 views
How do I find the exact value of sin (pi/24)?
7 answers
2,240 views
How do I find the exact value of sin (pi/24)?I am crying
1 answer
299 views
If 9m+5=2m+26, what is the value of m?
1 answer
304 views
How much farther did chris run on thursday than on wednesday? If he run 3 5/8 on thursday an 1 1/4 on wednesday
1 answer
263 views
Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by
3 answers
438 views
(cosx - sinx)^2 + (cosx + sinx)^2 = 2
Iam in this step: 2cos^2(x) + 2sin^2(x) = 2 How can I make the equation on the right equal
3 answers
494 views
How does:
sin^2(x) - cos^2(x) = 1 - 2cos^2(x)
1 answer
372 views
Can someone please explain how to simplify this proiblem:
cotx/sec^2 + cotx/csc^2
3 answers
464 views
The one-pod condition (P) is dominant to the three pod condition (p). Normal leaf (L) is dominant to wrinkled leaf(l). Determine
2 answers
517 views
An airplane travels 330 m down the runway before taking off. Assuming that it has constant acceleration, if it starts from rest
4 answers
1,907 views
A car entering the freeway accelerates from 10.2 m/s with a constant acceleration of 4.4 m/s2. What is the car’s final
3 answers
1,435 views
For the most part, will a law of cosines always be one triangle? As in one triangle to solve?
2 answers
477 views
P=(-2,2) Q=(3,4) S=(2,-8)
PS-3PQ Find the component form and magnitude of the vector.
5 answers
1,466 views
Find a unit vector in the direction of the given vector.
v=(1,-1)
4 answers
447 views
Find a unit vector in the direction of the given vector.
w=-1-2j
4 answers
723 views
A total solar eclipse occurs when the moon passes between the earth and the sun, and the darkest shadow cast by the moon, called
4 answers
1,992 views
A piece of a broken wheel is shown. It was taken to a machine shop to be replaced with a new “whole” wheel. Find the radius
1 answer
502 views
The percent grade of a highway is the amount that the highway raises or falls in a given horizontal distance. For example, a
2 answers
610 views
What is the purpose of using a plasmid containing an antibiotic resistance gene in the transformation process?
1 answer
461 views
Why are Eukaryotes more difficult to Transform than Prokaryotes? What methods can be used to transform Eukaryotes?
1 answer
626 views
Show 2/4 of the set. How many counters?
2 answers
636 views
Frank is traveling the posted speed limit of 36 mi/hr in a school zone. A deer darts out between two cars. He instantly hits the
1 answer
482 views
June stands on the roof of the house which is 22.8 m high and she throws the ball at an initial speed of 4.90 m/s downward at
1 answer
399 views
The following equation is used to find c, the total cost for printing a quantity of high school yearbooks, b.
c=5b+200
2 answers
515 views
A red ball is thrown down with an initial speed of 1 m/s from a height of 27 meters above the ground. Then, 0.6 seconds after
2 answers
582 views
How many grams of Cl are in 38.0g of CF2Cl2? I really want to figure out how to do it. I can't seem to understand any of this
4 answers
asked by
Luis
10,001 views
A 4.78-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide Use this data to calculate the mass
3 answers
1,811 views
Becka borrowed $100 from her cousin at the rate of 6% per year. If the inflation rate was 2% that year, what is her cousin's
3 answers
2,111 views
How long does it take light to travel each of the following distances
2462 mi, the distance between Los Angeles and New York. How
4 answers
2,527 views
Calculate the theoretical yield of alum if 0.200g of Aluminum was reacted with excess KOH and H2SO4?
I don't even know how to
3 answers
2,071 views
Ho w much water would you need to add to 500 mL of a 0.3 M calcium nitrate solution to make
1 answer
426 views
Imagine that you have an ideal gas in a 8.00L container, and that 2850 molecules of this gas collide with a square-inch area of
3 answers
1,025 views
V1= 38.8
n1= 1.60*10^-3 V2= 49.9 n2= ? How do we solve for n2 using avogadro's law?
2 answers
904 views
What is the molarity of ZnCl2(aq) that forms when 18.0g of zinc completely reacts with CuCl2(aq) according to the following
2 answers
651 views
Calculate the freezing point of a water solution at each concentration.
1.40m? What are the steps to calculate this?
4 answers
1,098 views
Magnesium has three naturally occurring isotopes: Mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, Mg-25 with
6 answers
2,527 views
A 27.00mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1422M KOH solution. A volume of 40.22mL of
3 answers
1,112 views
I would appreciate it if someone would be willing to look over my essay real quick. I just would like to know if I made any
1 answer
954 views
Putting objects together in a group based on a common criterion such as color or shape is called
A. the same name. B.
6 answers
1,303 views
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