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Alex

Questions and answers by Alex, page 9

Questions (2,580)

What are the x-intercepts of the circle with center (0, −2) and radius 3?
1. 1 answer
2. 369 views
Simplify (3^−2 − 2^−2)^−1The answer is -36/5 I just need to know how to do it.
1. 1 answer
2. 288 views
The decomposition of KClO3 produces oxygen gas and solid KCl. What mass of KClO3 must be decomposed to produce 126 L of oxygen
1. 4 answers
2. 2,744 views
A person is pushing on a refrigerator that sits on a level floor. Use Newton's third law along with his second law to find the
1. 3 answers
2. 1,459 views
A car is moving with a velocity of 16 m/s when the brakes are applied and the wheels lock (stop spinning). The car then slides
1. 2 answers
2. 619 views
A squirrel is resting in a tall tree when it slips from a branch that is 40 m above the ground. It is a very agile squirrel and
1. 2 answers
2. 839 views
You work for a moving company and are given the job of pulling two large boxes of mass m1 = 115 kg and m2 = 286 kg using ropes
1. 1 answer
2. 938 views
A crate is placed on an inclined board as shown in the figure below. One end of the board is hinged so that the angle θ is
1. 3 answers
2. 1,847 views
You work for a moving company and are given the job of pulling two large boxes of mass m1 = 115 kg and m2 = 286 kg using ropes
1. 2 answers
2. 577 views
A horizontal rifle is fired at a target 47 m away. The bullet falls vertically a distance of 8 cm on the way to the target.(a)
1. 3 answers
2. 1,262 views
A sled is pulled with a horizontal force of 17 N along a level trail, and the acceleration is found to be 0.40 m/s2. An extra
1. 3 answers
2. 752 views
There are two forces acting on an object. One force has a magnitude of 39 N and is directed along the +x axis. The other force
1. 3 answers
2. 498 views
A compact disc spins at 2.8 revolutions per second. An ant is walking on the CD and finds that it just begins to slide off the
1. 3 answers
2. 863 views
A car of mass 1670 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's
1. 1 answer
2. 433 views
A car of mass 1670 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's
1. 3 answers
2. 1,015 views
What was one reform the Progressive movement achieved?direct election of U.S. senators reduction of government regulation
1. 3 answers
2. 922 views
One more question:Why did the Progressive movement want the direct election of senators? Senators elected indirectly made little
1. 4 answers
2. 1,716 views
An electric motor is rated to have a maximum power output of 0.72 hp. If this motor is being used to lift a crate of mass 188
1. 3 answers
2. 1,270 views
A car engine is initially rotating at 180 rad/s. It is then turned off and takes 1.20 s to come to a complete stop. What is the
1. 2 answers
2. 497 views
An open railroad car of mass 2445 kg is coasting with an initial speed of 22 m/s on a frictionless, horizontal track. It is
1. 2 answers
2. 624 views
Project U onto V. U=(4,2) V=(1,-2)?? Is there a formula for this?
1. 3 answers
2. 333 views
Halley's comet moves about the Sun in a highly elliptical orbit. At its closest approach, it is a distance of 8.90 1010 m from
1. 4 answers
2. 1,798 views
A CD (radius 6.0 cm) is spinning freely with an angular velocity of 450 rpm when a bug drops onto the CD a distance 4.6 cm from
1. 1 answer
2. 433 views
The blood flow rate through the aorta is typically 103 cm^3/s, and a typical adult has about 4.9 liters of blood.(a) How long
1. 4 answers
2. 930 views
The displacement of a harmonic oscillator is given by y = 8.4 sin(14t), where the units of y are meters and t is measured in
1. 4 answers
2. 486 views
If a spherical glass marble has a radius of 0.00665 m at 1.02×105 Pa, at what pressure will it have a radius of 0.00650 m?Thank
1. 1 answer
2. 331 views
A wave on a string has a speed of 400 m/s. If the tension in the string is 131 N and its length is 3.5 m, what is the mass of
1. 1 answer
2. 408 views
me teacher has asked us to make some questions on guru nanak and i am not sure what to put so i was wondering is someone can
1. 1 answer
2. 412 views
A pot contains 243 g of water at 78°C. If this water is heated and all evaporates to form steam at 100°C, what is the change
1. 1 answer
2. 408 views
1. Jacksonville Technical College received $3,445,553 in state aid on September 15 for the fall academic semester. The
1. 2 answers
2. 651 views
When two identical ions are separated by a distance of 5.9 multiplied by 10-10 m, the electrostatic force each exerts on the
1. 2 answers
2. 549 views
. Jacksonville Technical College received $3,445,553 in state aid on September 15 for the fall academic semester. The
1. 4 answers
2. 1,402 views
A business issued a $9000, 120-day note to a supplier which discounted the note at 9%. The proceeds are:
1. 1 answer
2. 370 views
A pulley system os being used to raise a load. The rope begins at the ceilings, goes down, round a pulley on the load, up to a
1. 2 answers
2. 577 views
A horse pulls upon a wagon, but according to Newton’s third law the wagon pulls back with an equal and opposite force upon the
1. 2 answers
2. 1,272 views
A horse pulls upon a wagon, but according to Newton’s third law the wagon pulls back with an equal and opposite force upon the
1. 2 answers
2. 549 views
Mckenzie's age is 3 years less than 4 times Alec's age. Lily is 1 year less than Mckenzie. If Alec is 2, how old is Lily?
1. 3 answers
2. 396 views
A. Westside v. MergensB. Texas v. Johnson C. Roe v. Wade D. Bethel v. Fraser E. Dennis v. U.S. F. Lemon v. Kurtzman G. Wallace
1. 4 answers
2. 551 views
A. general electionB. propaganda C. conventions D. open primary E. soundbite F. interest group G. trade union H. grassroots I.
1. 10 answers
2. 1,752 views
A baseball teams ace pitcher throws fast balls at a velocity of 160kmh, the balls are released at a height of 1.6m from the
1. 1 answer
2. 434 views
A Football player on team a is movin gat a velocity of 8ms at an angle of 49 below the x axis. He collides with a player on team
1. 3 answers
2. 547 views
A motorcycle stuntman must jump from a ramp to a platform. The platform is located 15M away and is 2M higher then the tip of the
1. 5 answers
2. 502 views
A proposed interstellar space vehicle comprises an accommodation unit of mass 690 Tons at the front, separated by a light tube
1. 1 answer
2. 393 views
A crate slides down a ramp at angle 48 degree to horizontal. The coefficient of limiting friction is 0.48. Find the options for
1. 1 answer
2. 389 views
I need help on how to solve this type of problem please.29.)Solve the inequality and express the solution in terms of intervals
1. 1 answer
2. 360 views
Solve the inequality and express the solution in terms of intervals whenever possible.| x+3 | < 0.01 I know the answer is :
1. 2 answers
2. 689 views
Find all intervals on which the given expressions are positive.(x-1)(x+2) I know the answer is : x<-2, x>1 please show me the
1. 2 answers
2. 473 views
Find k, given that (2,k) is equidistant from (3,7) and (9,1).The answer is : k=0 How do I solve this problem?
1. 5 answers
2. 5,027 views
Buoyancy.A Team of 6 scouts plan to cross a lake on a raft they designed. The dimensions of each plank is 30 cm x 30 cm x 3m.
1. 1 answer
2. 430 views
Imagine that you are sitting 6 feet away from a television that is hung on a wall. The top of the TV is 8 feet off the ground.
1. 2 answers
2. 732 views
x+1/3=5/6
1. 1 answer
2. 303 views
In a fairground ride a child of mass 37 kg stands against the inside surface of a circular cylinder of radius 3.9m that rotates
1. 2 answers
2. 730 views
The drag coefficient = 0.354The mass of car = 1200 kg rolling resistance = 180 N Air density = 1.181 kg m^-3 Frontal area = 1.88
1. 2 answers
2. 1,139 views
Block A of mass 115 kg rests on a table with which it has a coefficient of limiting friction of 0.37. A light cord passes
1. 2 answers
2. 576 views
At a certain temperature, .5 mol of PCl5 was placed in a .25 L vessel and permitted to react as shownPCl5 (g) --> PCl3 (g)+ Cl2
1. 2 answers
2. 601 views
I have been stuck on this for a while now and cant figure out what it is i am doing wrong HELP!!!A tennis ball with a velocity
1. 2 answers
2. 1,131 views
A rok is thrown 24 meters/sec upward and lands in a 10 meter deep hole. How long is the rock in the air until it reaches the
1. 1 answer
2. 355 views
A hill that has a 31.4 % grade is one that rises 31.4 m vertically for every 100.0 m of distance in the horizontal direction. At
1. 4 answers
2. 731 views
A hill that has a 31.4 % grade is one that rises 31.4 m vertically for every 100.0 m of distance in the horizontal direction. At
1. 3 answers
2. 494 views
Solve 3.3= 1.005^n
1. 1 answer
2. 274 views
A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two
1. 2 answers
2. 483 views
A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two
1. 2 answers
2. 542 views
Jarrod wants to save $245 to buy a Wii gaming system. If he was saving $35 each month, how long would it take him to have the
1. 1 answer
2. 425 views
John runs on a daily basis. He jogs 5 miles every day except Saturday. On that day he jogs 9 miles. How many miles will he jog
1. 7 answers
2. 1,229 views
Find the density in g/cm3 of a 800 cm3 piece of metal having a mass of 4 kg.
1. 1 answer
2. 402 views
Jim is paid for overtime when he works more than 40 hours per week. Write an expression for the number of hours he works
1. 3 answers
2. 744 views
You are on a hike in the mountains. You have 4.92 km left to go before your next campsite.The sun will set in 6.6 h. What
1. 2 answers
2. 480 views
Both car A and car B leave school at the sametime, traveling in the same direction. Car A travels at a constant speed of 78
1. 1 answer
2. 451 views
If a solution A has 10,000 times as many H+ ions as solution B, what is the difference in pH units between the two solutions?
1. 1 answer
2. 425 views
make a statement relating hydrogen ion concentration to the acidity and basicity of solutions
1. 1 answer
2. 480 views
5. You have made the following two solutions: X) hydrogen ion concentration = 1 x 10-5M Y) pH = 4State which statements below
1. 2 answers
2. 871 views
If a solution A has 10,000 times as many H+ ions as solution B, what is the difference in pH units between the two solutions?
1. 1 answer
2. 371 views
make a statement relating hydrogen ion concentration to the acidity and basicity of solutions
1. 3 answers
2. 1,046 views
A projectile is fired straight up at a speed of 13 m/s.How long does it take to reach the top of its motion? The acceleration
1. 2 answers
2. 529 views
An urn contains a red ball, a blue ball, an orange ball, and a yellow ball. A ball is chosen one at a time then replaced. This
1. 1 answer
2. 379 views
C2H4(g) + H2O(l)→ C2H5O(l) what is the rendition percentage if 4.50g of C2H4 produce 4.7g of ethyl alcohol?
1. 2 answers
2. 511 views
A particle with a charge of -1.4 μC and a mass of 2.9 x 10-6 kg is released from rest at point A and accelerates toward point
1. 4 answers
2. 2,356 views
A sprinter explodes out of the starting block with an acceleration of + 2.02 m/s2, which she sustains for 1.12 s. Then, her
1. 2 answers
2. 699 views
A jogger accelerates from rest to 5.78 m/s in 3.51 s. A car accelerates from 19.7 to 32.1 m/s also in 3.51 s. (a) Find the
1. 1 answer
2. 403 views
A factory can produce two products, x and y, with a profit approximated by P =I think it's b but I'm not really sure. Can
1. 12 answers
2. 8,236 views
An athlete springs a circular 400.0 m track in 50.0 s. Asume he runs a constant speed.a. What is his speed over the entire
1. 3 answers
2. 1,061 views
A truck driver attempting to deliver somefurniture travels 5 km east, turns around and travels 5 km west, and then travels 12 km
1. 3 answers
2. 1,552 views
a solution is 0.0300 m in Sodium. How many grams of sodium carbonate are necessary to prepare 900.0 ml of this solution?I don't
1. 1 answer
2. 324 views
Two charges are placed on the x axis. One of the charges (q1 = +8.71C) is at x1 = +3.00 cm and the other (q2 = -28.6C) is at x2
1. 1 answer
2. 510 views
Two charges are placed on the x axis. One of the charges (q1 = +8.71C) is at x1 = +3.00 cm and the other (q2 = -28.6C) is at x2
1. 1 answer
2. 505 views
Prove (by using a point and a normal vector) that the plane whose intercepts with the coordinate axes are x=1, y=1, and z=1 is
1. 1 answer
2. 304 views
Calculate the pH and the pOH of an aqueous solution that is 0.025 M in HCl(aq) and 0.075 M in HBr(aq) at 25°C.
1. 5 answers
2. 7,292 views
If the Kb of a weak base is 2.6 × 10-6, what is the pH of a 0.24 M solution of this base?
1. 2 answers
2. 856 views
Find the limit of(2cosx+3cosx-2)/(2cosx-1)as x tends to pi/3.
1. 2 answers
2. 536 views
Two cars pass each other traveling at the same speed. One car has a constant velocity of 18.0 m/s east. The other car has a
1. 3 answers
2. 1,607 views
We will calculate the amount of acid to use in each titration. Assume that you are using 0.0512 M NaOH(aq). A good volume of
1. 1 answer
2. 848 views
A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west,and the acceleration of
1. 1 answer
2. 1,035 views
A crank of length 190mm is initially at 65 degree above the horizontal, and rotates through 35 degree towards the horizontal. A
1. 2 answers
2. 499 views
A 0.395-kg blue bead slides on a frictionless, curved wire, starting from rest at point in the figure below, where h = 1.50 m.
1. 4 answers
2. 5,185 views
A uniform rectangular bar with cross-section 66 mm x 54 mm and of length 1.7 m has mass 16kg. It pivots about an axis
1. 3 answers
2. 388 views
Given the length an athlete throws a hammer is a normal random variable with mean 50 feet and standard deviation 5 feet, what is
1. 4 answers
2. 1,557 views
5 countries in Africa with coastlines on the Atlantic Ocean and lie between 20 degrees n and 10 degrees n? I think they are
1. 3 answers
2. 493 views
A 2.42kg block starts from rest at the top of a 22.9◦ incline and accelerates uniformly down the incline,moving 2.41m in
1. 4 answers
2. 439 views
Find the derivative of y with respect to x. y=(x^6/6)(lnx)-(x^6/36)So far this is what I've gotten: y=(x^6/6)(lnx)-(x^6/36)
1. 2 answers
2. 688 views
Sare estimated 32x45 by using 30x40. How could Sara make a more accurate estimate?
1. 4 answers
2. 497 views

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