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rick
Questions (107)
tell me about science apparatus
They are used in science. You need a much more specific question to get a useful answer. For
1 answer
444 views
wat is 45x320?
1 answer
295 views
How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.8 µC?
9 answers
2,483 views
An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together
2 answers
849 views
A car battery has a rating of 200 ampere·hours (A·h). This rating is one indication of the total charge that the battery can
1 answer
437 views
A car battery has a rating of 200 ampere·hours (A·h). This rating is one indication of the total charge that the battery can
3 answers
906 views
A toaster uses a Nichrome heating wire. When the toaster is turned on at 20°C, the initial current is 1.50 A. A few seconds
7 answers
2,264 views
The average power dissipated in a stereo speaker is 54 W. Assuming that the speaker can be treated as a 4.0- resistance, find
4 answers
826 views
There is a 0.225 T magnetic field directed along the +x axis and a field of unknown magnitude along the +y axis. A particle
4 answers
478 views
An electric power line carries a current of 1600 A in a location where the earth's magnetic field is 4.0*10-5 T. The line makes
2 answers
1,090 views
In a lightning bolt, 13 C of charge flows in a time of 1.5*10-3 s. Assuming that the lightning bolt can be represented as a
2 answers
743 views
A piece of copper wire has a resistance per unit length of 6.45*10-3 /m. The wire is wound into a thin, flat coil of many turns
4 answers
1,473 views
The average emf induced in the secondary coil is 0.10 V when the current in the primary coil changes from 3.2 to 2.0 A in 0.10
1 answer
473 views
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.5 m.
2 answers
632 views
Suppose you wish to make a solenoid whose self-inductance is 3.0 mH. The inductor is to have a cross-sectional area of 2.0*10^-3
2 answers
496 views
A generating station is producing 1.3*10^6 W of power that is to be sent to a small town located 7.0 km away. Each of the two
1 answer
519 views
If sin = 4/5 with A in QII, and sin B = -3/5 with B in QIV find cos(A-B)
4 answers
1,775 views
If sin = -3/5 with A in QIV, find cos A/2
2 answers
627 views
Prove the identity
sin (3 pi/2 + x) + sin (3 pi/2 -x) = -2 cos x
2 answers
959 views
In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year. The
3 answers
1,897 views
The human eye is most sensitive to light having a frequency of about 5.3*10^14 Hz, which is in the yellow-green region of the
4 answers
2,855 views
1.0 X 21 =
6 answers
287 views
1.0 X 21 = 21 or 210 because of the decimal point, I just don't remenber how the decimal point works.
2 answers
940 views
A person stands 4.4 m in front of a wall that is covered floor-to-ceiling with a plane mirror. His eyes are 1.9 m above the
4 answers
1,107 views
A camera is supplied with two interchangeable lenses, whose focal lengths are 35.0 and 150.0 mm. A woman whose height is 1.80 m
3 answers
1,031 views
From a distance of 60 m, a photographer uses a telephoto lens (f = 300.0 mm) to take a picture of a charging rhinoceros. How far
1 answer
490 views
A law enforcement officer in an intergalactic "police car" turns on a red flashing light and sees it generate a flash every 1.5
3 answers
918 views
An owl has good night vision because its eyes can detect a light intensity as small as 5.0*10^-13 W/m2. What is the minimum
3 answers
1,355 views
An electron and a positron each have a mass of 9.11*10^-31 kg. They collide and both vanish, with only electromagnetic radiation
2 answers
772 views
A laser emits 1.44*10^18 photons per second in a beam of light that has a diameter of 1.98 mm and a wavelength of 524.5 nm.
(a)
4 answers
758 views
this is a sped class. how or how is easiest to teach them?
5 answers
346 views
Which organ sterilizes ingested food?
A. Salivary glands C. Pancreas B. Stomach D. Liver (B)
3 answers
489 views
in a 4 1/2 mile relay race there were 9 runners what part of a mile did each run
1 answer
474 views
how many ounces in a cup?
1 answer
465 views
A 114g sample of sucrose undergoes incomplete combustion according to the reaction
C12H22011 + 5O2 ---> 4C + 6CO + 2CO2 + 11H2O
3 answers
785 views
propanoic acid ch3ch2cooh is a weak acid which has a value for dissociation content of ka = 6.3 x 10^-6 calculate the pH of an
6 answers
1,370 views
determine whether the following salts will form acidic, neutral or basic solutions in water.
Na2HPO4 CaNO2 NH4CH3COO Al2SO4 NaF
2 answers
921 views
Ok I have a bunch of questions, please bare with me and i'd appreciate it VERY much if you could help me with these!
1. Assume
1 answer
1,040 views
An architect is designing the floors for a hotel. Each floor is to be rectangular and is allotted 720 ft of security piping
2 answers
1,234 views
An object that is tossed downward with an initial speed (velocity) of will travel a distance of s meters, where and t is
1 answer
308 views
true or false. because resources are plentiful, people must make choices.
4 answers
377 views
14. Evolutionary theories often emphasize that humans have adapted to their physical
environment. One such theory hypothesizes
2 answers
905 views
A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 320 km/h in a semicircular arc with a
2 answers
733 views
Question: Use logical equivalnces to show that the propositions !p -> (q->r) and q -> (p v r) are logically equivalent.
I AM SO
1 answer
491 views
Question: Use logical equivalnces to show that the propositions !p -> (q->r) and q -> (p v r) are logically equivalent.
I AM SO
2 answers
530 views
waterline in my back yard is represented by the equation Y=-1/4x +8
What is the slope of the equation what is the Y intercept of
1 answer
381 views
Is this true or false?
In an experiment involving matched pairs, a sample of 13 pairs of observations is collected. The degree of
1 answer
458 views
Is this true or false?
In an experiment involving matched pairs, a sample of 13 pairs of observations is collected. The degree of
2 answers
672 views
how much money would have to be invested in an account at 3.98% annual interset to achieve a balance of 25,000 in 17 years if
a.
3 answers
714 views
A 3Kg projectile is fired straight upward from earth's surface with a speed that is one-fourth the escape speed. Neglecting air
3 answers
791 views
structured design (pseudocode only) driving a car
1 answer
342 views
Create a 6-slide Microsoft® PowerPoint® presentation, including speaker notes, tracing the nutrition needs of both a man and a
1 answer
466 views
a sample of a radioisotope had a mass of 100.0 grams. After exactly 24 days, 6.25 grams remained. The half life of the isotope
3 answers
1,479 views
a wheel makes 4 3/10 revolutions per minute. if it rotates for 95 minutes, how many revoltutions does it make?
1 answer
397 views
What is a u square?
1 answer
274 views
what is the concentration of a solution with 5 grams of HBr dissolved in 2 liters of water?
2 answers
968 views
what steps would you take to answer
2(x-3)-17=13-3(x+2)
3 answers
329 views
if 10.0g of NaF and 20.0 g of HF are dissolved in water to make one liter of solution, what will the pH be? For HF, Ka=6.8x10-4.
2 answers
853 views
Factor each of the following trinomials: (14 marks)
A)15s2 + 26s + 8 B) x4 – 5x2 – 36 (hint: let a = x2) C) t2 + 4t – 2 D)
1 answer
389 views
If (x – 3) divides evenly into x^3 – x^2 – kx + k, find k. (2 marks)
1 answer
310 views
When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.
(2 marks)
1 answer
277 views
When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.
1 answer
406 views
Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the
1 answer
350 views
Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the
2 answers
900 views
When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.
2 answers
790 views
Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the
1 answer
331 views
When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.
1 answer
311 views
Solve the following polynomial inequalities.
a) 4x - 5 ≤ 2(x - 7)
1 answer
368 views
Solve the following polynomial inequalities.
A) x^3 - 5x^2 + 2x ≥ -8 B)2(x3 - 2x2 + 3) < x(x - 1)(x + 1)
1 answer
393 views
Solve the following polynomial inequalities.
4x - 5 ≤ 2(x - 7)
3 answers
904 views
The Pythagorean Theorem gives the relationship between the sides of a right triangle. The following identities show the
1 answer
808 views
In a bird sanctuary 41 different special of birds are being studied. Three large bird feeders are constructed, each providing a
2 answers
592 views
The queen asked her cook how many guests had attended a recent banquet. “I do not know, my lady” he said, “but every two
4 answers
507 views
The queen asked her cook how many guests had attended a recent banquet. “I do not know, my lady” he said, “but every two
4 answers
439 views
Multiply using Area Models – Draw the model
a. 1/3 x 4/5 b. 3/4 x 1/5
1 answer
455 views
Whole numbers can be represented by rectangular arrays of tile.
What kind of numbers have more than one rectangular array?
2 answers
837 views
what volume of 1M NaOH is needed for the reaction with 1L of 1M HCl?
1 answer
331 views
The average middle-distance runner at a local high school runs the mile in 4.5 minutes, with a standard deviation of 0.3 minute.
4 answers
3,409 views
7/12, 14/30 approximation which is greater
1 answer
345 views
Final Global Business Plan Paper and Presentation for paraguau
1 answer
349 views
A projectile is shot straight up from the earth's surface at a speed of 1.50×104 .
4 answers
713 views
a state of indiana lotto ticket pays winners $0, $5, $25, and $200 with probabilities of 0.94, 0.03, 0.02, and 0.01
1 answer
393 views
which metal react most vigorously?
metals aluminum, copper, magnesium, lead, tin, zinc 1. which metal will react most quickly? 2.
2 answers
1,030 views
If the probability of an event happening is 2/5, then the probability of the event not happening is 3/5? This is False. The
2 answers
699 views
The marketing manager at Massimino & McCarthy, a chain of retail stores that sells men's clothing, is reviewing marketing
2 answers
1,334 views
15xy (x=y)
1 answer
323 views
The average temperature for the month of April is 65 degrees. The temperatures ranged from 12 degrees warmer or colder. Write
2 answers
621 views
A ball is thrown 107 m upward and then falls back to earth.
Neglecting air resistance, how long will it be in the air? The
3 answers
1,332 views
the slope of a mountain if 10, 560 feet lenghth and 5,280 feet widthe
1 answer
273 views
what is th value of 4!
3 answers
277 views
What is one way that “The Maori: Genealogies and Origins in New Zealand” contrasts with “The Raven and the First Men: The
4 answers
1,407 views
A theater that is rectangular in shape seats 720 people.The number of rows needed to seat the people would be 4 less if each row
2 answers
561 views
Pat worked 43 hours and received $7.25 per hour for regular pay and
time-and-a-half for all hours over 40 hours. What were her
2 answers
591 views
graph inequality k<-1
1 answer
421 views
I need an example how to graph for an
inequality solution. eq. 5<x+31
1 answer
334 views
solve inequality and graph
a-1/4 > 5 3/4
1 answer
309 views
-5+b<-19 solve inequality and graph
1 answer
318 views
a store manager is accipting applications for part time workers. He can hire no more than 14 people. So far he has hired 9
2 answers
610 views
-4x<-64
4/5h>-2 solve each inequality
1 answer
335 views
A box slides down a frictionless 35 degree incline. Determine its acceleration. If the incline is 10.0 m long and the box starts
3 answers
1,653 views
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