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Tim
Questions and answers by visitors named
Tim
, page 4
Questions (992)
There are two trains. The first train is travelling at 52 km/h. The second train is travelling at 68 km/h. It takes 9 seconds
1 answer
478 views
An electron with a speed of 1.9 × 107 m/s moves horizontally into a region where a constant vertical force of 5.4 × 10-16 N
1 answer
497 views
You have equally likely chance of choosing any number from 1 to 10. What is the probability that you choose a number greater
2 answers
952 views
The red laser light used in supermarket scanners has a wavelength of 633 x 10-9 m. (This is 633 nanometers, 633 nm). Find the
1 answer
493 views
A proton with kinetic energy 100 keV is moving in a plane perpindicular to a uniform magnetic field of magnitude 2.3 T. Find the
1 answer
350 views
A proton with kinetic energy 100 keV is moving in a plane perpindicular to a uniform magnetic field of magnitude 2.3 T. Find the
3 answers
366 views
Now calculate Kb the base dissociation constant for [C2H3O2-], acetate anion, for each of your trials from the concentrations of
3 answers
5,820 views
356 Cal to kilowatt-hours
1 answer
302 views
A gardener wants to fence in her plot in two equal rectangular sections. If she has 120 yards of fence and the area of the
3 answers
639 views
A system consists of two particles. Particle 1 with mass 2.0 kg is located at (2.0 m, 6.0 m) and has a velocity of (3.1 m/s, 2.6
2 answers
577 views
When viewing Angel Falls (the world's highest waterfall) from Observation Platform A, located on the
same level as the bottom of
1 answer
485 views
A thin uniform rod (length = 1.3 m, mass = 3.2 kg) is pivoted about a horizontal frictionless pin through one of its ends. The
2 answers
1,377 views
A trapdoor on a stage has a mass of 20.8 kg and a width of 1.58 m (hinge side to handle side). The door can be treated as having
14 answers
834 views
A carefully designed experiment can measure the gravitational force between masses of 9 kg. Given that the density of iron is
5 answers
671 views
A comet orbits the Sun with a period of 72.8 yr.
(a) Find the semimajor axis of the orbit of the comet in astronomical units (1
2 answers
536 views
which has the greater average speed: a car that travels from milepost 35 to milepost 40 in 5 minutes, or one that travels from
2 answers
517 views
This is a lab called Enthalpy and Entropy of Borax Dissolution and I just can't seem to get the right answers... Please help me
5 answers
2,563 views
A tower that is 65m high makes an obtuse angle with the ground. The vertical distance from the top of the tower to the ground is
3 answers
1,629 views
You've been assigned to invite a group of mechanical engineering professors to tour your facility. What type of language should
1 answer
451 views
A 15.2-F capacitor has an initial voltage of 2.00 V. It is charged with a current given by i=t�ã5=t^2. Find the voltage across
3 answers
528 views
Given the formula Xc=1/6.28fC, find C if Xc =500 and f=2000.
What are the rules that take me from 500/1 = 1/6.28*2000*C to the
3 answers
433 views
complete the square 16x-12y=4y^2+1
1 answer
449 views
Here's the question:
You are attending a very loud concert. To avoid permanent ear damage, you decide to move farther from the
1 answer
493 views
A man in an elevator is 79kg. The elevator itself is 860kg. As the elevator begins to move down, a scale the man is standing on
2 answers
595 views
A 25.00 mL solution of potassium nitrate (KNO3) was diluted to 125.0 mL, and 25.00 mL of this solution were then diluted to
2 answers
991 views
The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One
3 answers
905 views
The drawing shows two frictionless inclines that begin at ground level (h = 0 m) and slope upward at the same angle θ. One
3 answers
1,840 views
If half the batch of 6,000 vials are contaminated, what is the probability of finding no contaminated vials if only two vials
1 answer
325 views
Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic
2 answers
603 views
How do I begin to simplify this?
3x/(4x-5y)=6ay-14b
2 answers
921 views
An airplane has a mass of 2.04 × 104 kg and takes off under the influence of a constant net force of 2.18 × 104 N. What is the
1 answer
433 views
A 96.6-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with
2 answers
717 views
Traveling at a speed of 20.0 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The
2 answers
526 views
What is the slope of the line that passes through (5,8)(17,2)?
I think the answer is: -1/2 (1 over 2)
4 answers
322 views
What is the slope of the line that passes through (-12.5,3.2)(-15.5,-7.2)?
I think the answer is: -10.4/-3.5. Not sure on this
2 answers
826 views
What is the slope of the line that passes through (3/5,-2)(-6,2/9)?
I don't even have a good guess at this one. Thanks.
2 answers
560 views
What is the slope of the line that passes through (3/5,-2)(-6,2/9)?
I don't even have a good guess at this one. Thanks.
1 answer
610 views
What is the slope of the line that passes through (-12.5,3.2)(-15.5,-7.2)?
I think the answer is: -10.4/-3.5. Not sure on this
2 answers
893 views
You are the designer of a school bus and would like to know what the maximum stopping distance is that will ensure the students
1 answer
468 views
Carrying household appliances can be very difficult due to the weight and size. Some movers place the appliance on a dolly and
2 answers
509 views
Police examine the scene of an accident involving two cars, which is parked. The skid marks of the moving car, which nearly came
2 answers
1,005 views
Two people push on a box that has a mass of 10kg, the person on the right has a mass of 86kg and applies a horizontal force of
1 answer
424 views
Two blocks, (Mass of block 1 = 2.3kg, Mass of block 2 = 1.2kg), are in contact on a frictionless table. If a horizontal force of
1 answer
1,135 views
You have setup an experiment with two 50g masses attached to strings that are connected on opposite sides of a scale that
1 answer
1,013 views
You are the designer of a school bus and would like to know what the maximum stopping distance is that will ensure the students
1 answer
388 views
Two blocks, (Mass of block 1 = 2.3kg, Mass of block 2 = 1.2kg), are in contact on a frictionless table. If a horizontal force of
1 answer
867 views
Two people push on a box that has a mass of 10kg, the person on the right has a mass of 86kg and applies a horizontal force of
1 answer
905 views
Carrying household appliances can be very difficult due to the weight and size. Some movers place the appliance on a dolly and
1 answer
461 views
Kathy's mom has made a batch of lemon bars. Her treats are in a rectangular pan that measures 12" x 8". She will cut a vertical
2 answers
482 views
How would you go about doing this problem? I've tried and with the answer given I still can't figure it out. If anyone could
4 answers
414 views
A 10 ohm resistor is connected in series with a 15 ohm resistor. If this circuit is connected to a 9 volt battery, what will be
2 answers
788 views
A race car travels 110 m/s around a circular track of radius 197 m. The track is banked at 22 degrees from the horizontal with a
1 answer
861 views
Factor: 12x^2+13x-35
I need help on how you would go about doing this. I only understand when 1 is the coefficient for the x^2
1 answer
480 views
An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. How much work is done by the lifting
5 answers
3,774 views
Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same
4 answers
2,734 views
An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. If the object is released from rest
4 answers
1,051 views
An ice skater of mass m is given a shove on a frozen pond. After the shove she has a speed of 2m/s. Assuming that the only
3 answers
1,013 views
What is the predicate of this sentence,Henry and Mudge hear something.Is hear something the predicate
5 answers
1,675 views
A car (mass = 1080 kg) is traveling at 25.4 m/s when it collides head-on with a sport utility vehicle (mass = 2750 kg) traveling
2 answers
531 views
A 48.8-kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a
2 answers
1,150 views
A block of mass m = 3.40kg and charge q = 1.50C is on an incline plane that makes an angle è = 33.0o with the horizon. An
1 answer
348 views
Suppose that there is a partial blockage of the aorta, which normally pumps about 5 L of blood per
minute. If the diameter of the
3 answers
1,752 views
Can a triangle have parallel line segments. And is any line segment in the drawing parallel to the line segment AB? The figure
2 answers
550 views
Eric sold 16 more tickets then Albert. Together they sold 100 tickets. How many did each person sell?
1 answer
335 views
Eric and Albert won prizes for selling the most raffle tickets. Together they sold 100 tickets. Albert sold 16 tickets more than
1 answer
375 views
There were 20 more fifth graders then fourth graders. 140 students from both grades. How many fifth graders were there?
1 answer
447 views
What fraction is half of the fraction that is half of 1/2?
6 answers
1,371 views
What fraction of a circle is 33-1/3% of a circle?
4 answers
2,450 views
Sue and bob both jumped rope to raise money. Together they earned $24. Sue earned twice as much as bob. How much money did each
1 answer
336 views
The burning if 18.0 g of carbon produces 55.0 g of carbon dioxide. What is the theoretical yield of CO2? Calculate the percent
3 answers
817 views
Emil had great luck at the game,but Kim did not. Together they won 16 prizes. Emu won 10 more than Kim. How many did each win?
1 answer
364 views
What can I use as key words to search for information regarding REI's SCM?
I have been on this assignment forever and trying to
3 answers
508 views
What are ways that animals can help each other
1 answer
319 views
Shirley and Amy painted faces at the fair for an hr. sixteen children had their faces painted. Shirley was able to paint 3 times
1 answer
401 views
The school has raised $1,200 over the last 2 years. This year the school raised $200 more then last year. How much money did the
1 answer
385 views
33 1/3%+16 2/3%=
4 answers
210 views
If the diameter of a circle is 5 in., what is the radius?
What is the relationship of the diameter of a circle to radius?
5 answers
1,209 views
What number is 3/5 of 65?
6 answers
302 views
A string is fixed at both ends and vibrating at 120 Hz, which is its third harmonic frequency. The linear density of the string
3 answers
1,424 views
A string has a linear density of 6.2 x 10-3 kg/m and is under a tension of 250 N. The string is 1.2 m long, is fixed at both
2 answers
549 views
If a string fixed at both ends is vibrating at a frequency of 4.61 Hz and the distance between two successive nodes is 0.293 m,
1 answer
436 views
If a string fixed at both ends is vibrating at a frequency of 4.61 Hz and the distance between two successive nodes is 0.293 m,
1 answer
372 views
Two out-of-tune flutes play the same note. One produces a tone that has a frequency of 242 Hz, while the other produces 288 Hz.
4 answers
1,138 views
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1390 Hz. The bird-watcher, however, hears a
3 answers
1,891 views
The distance between a loudspeaker and the left ear of a listener is 2.19 m. (a) Calculate the time required for sound to travel
5 answers
1,637 views
A string has a linear density of 6.2 x 10-3 kg/m and is under a tension of 250 N. The string is 1.2 m long, is fixed at both
2 answers
834 views
The mass of a string is 6.8 x 10-3 kg, and it is stretched so that the tension in it is 210 N. A transverse wave traveling on
4 answers
508 views
A woman is standing in the ocean, and she notices that after a wave crest passes by, five more crests pass in a time of 68.0 s.
4 answers
3,269 views
A woman is standing in the ocean, and she notices that after a wave crest passes by, five more crests pass in a time of 68.0 s.
2 answers
599 views
In a room that is 2.69 m high, a spring (unstrained length = 0.28 m) hangs from the ceiling. A board whose length is 2.22 m is
2 answers
854 views
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of
3 answers
857 views
A horizontal spring is lying on a frictionless surface. One end of the spring is attaches to a wall while the other end is
1 answer
957 views
Mr lopez is putting up fence around his garden that is the shape of a rectangle,if the longer sides is 14 feet and the shorter
6 answers
447 views
A pad of loose-leaf paper is $0.40 less than a notebook. Together they cost $1.80. How much does the loose-leaf paper cost?? The
5 answers
373 views
You have 12 square tiles,each tile measures 1 foot on each side,how many non congruent rectangles can you make ?,each rectangle
1 answer
428 views
If you add enough water to 175.0 mL of a .15 M NaCl solution until the final volume is 350.0 mL, what will the molarity of the
3 answers
384 views
If the molality of a CaCl2 solution is .100 mol/kg, and was made from 500.0 mL of water, how many grams of CaCl2 were needed to
4 answers
1,178 views
Three machines turn out all the products in a factory, with the first machine producing 40% of the products, the second machine
1 answer
844 views
If gasoline costs $0.42 a liter, approximately how much will it cost to fill a 40 gallon tank?
1 answer
391 views
I have two separate questions that I am having trouble answering...
Why is Roman law often considered to be the greatest
3 answers
569 views
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