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David
Questions and answers by
David
, page 4
Questions (1,309)
3 There are two charges +Q and –Q/2 that locate at two positions with a separation of d as shown in Fig. 1. We
may put +Q at
4 answers
1,242 views
2d + 1
--- 5
3 answers
444 views
2d + 1 fifth
4 answers
248 views
An airplane flew a distance of 650 km at an average speed of 300km/h. How much time did the flight take?
5 answers
496 views
3m - 10 = 2(4m -5)
3 answers
277 views
Write each product in exponential form.
16 × 16 × 16 × 16 × 16 a.5^16 b.16^5 c.16^6 d.16^4 my answer 16^5
3 answers
663 views
Write an algebraic expression for the phrase.
the product of g and 4 a.4g b.g + 4 c.g/4 d.g – 4
10 answers
3,089 views
1. At 11:00 a.m. a one-meter-high mailbox casts a 0.7-meter shadow. If a pole beside the mailbox casts a 28-meter shadow, how
5 answers
552 views
3m - 10 = 2(4m -5)
5 answers
305 views
Which shows the expression below simplified?
(3.6 × 10^15) + (1.8 × 10^12) a. 3.60018 × 10^15 b. 3.902 × 10^14 c. 3.618 ×
5 answers
749 views
What is the definition of Mathematics?
a.adding and subtracting numbers b.the science of patterns and relationships c.the science
6 answers
574 views
The electric flux through the surface shown in Figure Ex27.10 is 15.0 Nm2/C, and the electric field makes an angle á = 70°
5 answers
6,229 views
A vehicle uses 1 tablespoon of gasoline to drive 125 yards. How many miles can the vehicle travel per gallon? Round your answer
3 answers
1,054 views
Donna and Sherman Terrel are preparing a budget for 2010. Donna is a systems analyst with an airplane manufacturer, and Sherman
2 answers
783 views
A rational number is ____ a real number.
a. always b. never c. sometimes its always ???????
3 answers
875 views
A certain can of iced tea contains 4% of the recommended daily allowance of sodium. The recommended daily allowance is 2500
2 answers
733 views
Eggs of Amphioxus is :
(a)alecithal (b)telolecithal (c)meiolecithal (d)mesolecithal is it A ?
2 answers
1,306 views
A graduated cylinder massed at 34.56g and then 8.6 ml was added of an unkonwn liquid this brought the mass to 45.87g. What is
5 answers
476 views
In a cyclotron (one type of particle accelerator), a deuteron (of mass 2.00 u) reaches a final speed of 8.4% of the speed of
4 answers
2,424 views
More oxygen will ___________ in colder water than in warmer water.
1 answer
391 views
A rectangle has a width of 6x+7,
a length of 13 How do I get the area?
5 answers
411 views
There are 50 members.
Melvin wants to collect some infromation from seven of them. Explain how he can do this using the following
5 answers
343 views
A superstore manager wishes to give out a survey to a sample of 25 of its workers. It wants the sample to be a good
3 answers
1,114 views
I need help with this question please. Draw the structure of triacylglycerol formed from oleic acid, linoleic acid, and stearic
2 answers
540 views
Hello. I am trying to figure out how to find the number of solutions in the following problem:
(x + 8) (x + 8) = 0
1 answer
304 views
CH3COOH + C5H12O -> C7H14O2 + H2O
If the yield for the reaction is 45%, how many grams of the product are formed when 3.58 g of
1 answer
1,080 views
CH3COOH + C5H12O -> C7H14O2 + H2O
If the yield for the reaction is 45%, how many grams of the product are formed when 3.58 g of
3 answers
1,375 views
how do seed banks preserve seeds for future generations?
4 answers
1,042 views
Factorise completely:
6x^2+10x-5= and 6x^2+8x-3=
1 answer
487 views
Why are so much niches available on so much recently devastated islands?
6 answers
409 views
What do engineers do?
1 answer
271 views
which of the following words cannot use the suffix -ive?
reveal- decis- conclus- impress-
3 answers
909 views
Water is flowing at 6 m/s in a circular pipe.
If the diameter of the pipe decreases to five-seventh its former value, what is the
4 answers
2,250 views
Why do magnesium, phosphorus, and zinc exhibit slightly higher first ionization energies than the general trend within each of
5 answers
3,926 views
write a function rule for each situation.
The volume V(n) of a cube when you know the length n of a side.
3 answers
490 views
Name these compounds
(^these are symbolize subscripts) 1. CoCl^3 2. CrF^6 3. AgBr 4. Fe^20^3 5. CrF^3 6. TiCl^4
1 answer
327 views
Writing in math, how can estimating help you add two-digit numbers?
4 answers
1,126 views
Hi there,
I am doing some data calculations for my lab, but I'm having some trouble. Given: Mass of ferrous ammonium sulfate=4.0g
2 answers
722 views
While on his way to school, Norman saw that the cost of gasoline was $2.50 per
gallon. Write a direct variation equation to
2 answers
566 views
Where would I find a great video resource for learning Visual C++ for beginners? I'm a newbie and I'm looking in some code for a
3 answers
416 views
For this problem, tell whether each relationship is a direct variation. Explain.
x | -3 | -6 | -9 | y | 18 | 36 | 54 | My teacher
1 answer
978 views
This is question 2 about direct variation
For this problem, tell whether each relationship is a direct variation. Explain. x | 8
1 answer
424 views
This is my third question about direct variation.
For this problem, tell whether each relationship is a direct variation.
2 answers
660 views
This is about direct variation.
The area a painter can paint varies directly with the amount of time he works. One morninig, he
2 answers
1,118 views
An aluminum cylinder with a density of 2.70 g/cm3 has a volume of 3.8 ¡¿ 10-5 m3. If the cylinder is suspended from a scale
2 answers
518 views
Which of the following electron configurations is not consistent with Hund's rule?
1) 1s^2 2s^2 2p^2 3s^1 2) 1s^2 2s^2 2p^6 3s^2
4 answers
1,134 views
Which of the following electron configurations is not consistent with Hund's rule?
1) 1s^2 2s^2 2p^2 3s^1 2) 1s^2 2s^2 2p^6 3s^2
3 answers
432 views
what is a slope intercept?
1 answer
305 views
The power in a resistor RLOAD of 10 Ω when connected to a 100 volt
supply is measured using a voltmeter and ammeter. There are
1 answer
430 views
1.) A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is
1 answer
491 views
The length of a simple pendulum is 0.79m and the mass of the particle at the end of the cable is 0.24 kg. The pendulum is pulled
3 answers
3,489 views
1.) The average sound intensity inside a busy neighborhood restaurant is 3.*10^-5 W/M^2. How much energy goes into each ear
2 answers
561 views
A string has a linear density of 8.5*10^-3 kg and is under the tension of 280 N. The string is 1.8 m long, is fixed at both
2 answers
1,207 views
1.) A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is
4 answers
4,581 views
Slove each system by substitution.
4x = y - 1 6x - 2y = -3 I have already attempted this problem and couldn't figure out what I
5 answers
585 views
Suppose you are managing 25 employees, and you need to form three teams to work on three different projects.
Assume that all
3 answers
728 views
when you put something in parenthesis like C(25,8) what does that mean or how do you solve it?
4 answers
300 views
Nick had 1 3/4 gallon of milk. How many pints of milk does Nick have.
4 answers
258 views
Hi. I am having some problems with substitution method and i just can't seem to get these right. I have
1. 2x - 3y = -1 with y =
2 answers
612 views
Hi. I am having some problems with substitution method and i just can't seem to get these right. I have
1. 2x - 3y = -1 with y =
1 answer
432 views
You place a box weighing 302.1 N on an in-
clined plane that makes a 35.6� angle with the horizontal. Compute the component of
1 answer
471 views
A certain spring stretches 5.3 cm when it
supports a mass of 0.65 kg . If the elastic limit is not reached, how far will it
1 answer
669 views
Some enterprising physics students working
on a catapult decide to have a water balloon fight in the school hallway. The ceiling
1 answer
863 views
Some enterprising physics students working
on a catapult decide to have a water balloon fight in the school hallway. The ceiling
3 answers
1,176 views
A certain spring stretches 5.3 cm when it
supports a mass of 0.65 kg . If the elastic limit is not reached, how far will it
4 answers
1,790 views
Two cars start from rest at the same location
and at the same instant and race along a straight track. Car A accelerates at 6.6
1 answer
754 views
The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec.
(a)Starting with [IBr] = 1.50M,
1 answer
439 views
An airplane must reach a speed of 185 mi/h to take off. If the runway is 467 m long, what is the minimum value of the
2 answers
1,094 views
The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec.
(a)Starting with [IBr] = 1.50M,
1 answer
456 views
The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec.
(a)Starting with [IBr] = 1.50M,
3 answers
683 views
A right triangle has one angle that measures 16 degrees. What are the measures of the other two angles?
5 answers
1,105 views
The angle bisector of one angle of a triangle forms two angles that measure 27 degrees. The angle bisector of another angle
2 answers
690 views
On a trip from Lousiana to Flordia, your family wants to travel at least 420 miles in 8 hours of driving. Write and solve an
4 answers
578 views
Use the bisection method or a graphing calculator to find the coordinates of the two points on the graph of that lie r = 1 unit
1 answer
411 views
Use the bisection method or a graphing calculator to find the coordinates of the two points on the graph of that lie r = 1 unit
1 answer
441 views
Arrows disappeared from below added them back to the equations.
The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order
1 answer
499 views
Arrows disappeared from below added them back to the equations.
??(a) I don't understand ln(No/N)=akt The decomposition of
1 answer
497 views
I am trying to solve
(2*(c^4)*2*(a^6))/(2*(a^10)) but the answer I am getting is 2c^4a^4. Do you know if this is correct?
3 answers
273 views
How does the author of “A Nation Apart” organize information to build his argument?
He organizes the information by first
2 answers
477 views
Arrows disappeared from below added them back to the equations.
??(a) I don't understand ln(No/N)=akt Is (a) -3.77 The
1 answer
481 views
An electron (mass m = 9.11e-31 kg) is accelerated in the uniform field E (E = 2.00e4 N/C) between two parallel charged plates.
2 answers
692 views
Fish-liver oil is a good source of Vitamin A. When 0.1232 g of fish liver oil is dissolved in 500. mL of solvent, an absorbance
3 answers
557 views
Fish-liver oil is a good source of Vitamin A. When 0.1232 g of fish liver oil is dissolved in 500. mL of solvent, an absorbance
3 answers
2,269 views
The area of a rectangular playground is 2,700 ft2. The length is 3
times the width.What are the dimensions of the playground?
2 answers
823 views
Explain the similarities and differences in the way the US and Canada gained independence
3 answers
489 views
How much potential energy does a 60kg skater have before she starts her ride, 12m above the ground?
1 answer
770 views
Doubling the voltage across a parallel plate capacitor does not double which of the following?
a. the charge b. the electric
2 answers
1,296 views
If all the wealth in the world were distributed evenly, how much money would each person have? How would this affect the
1 answer
375 views
If all the wealth in the world were distributed evenly, how much money would each person have? How would this affect the
2 answers
504 views
If a student's percentile rank in a class of 400 students is 87, how do I find the student's class rank.
3 answers
634 views
Could someone please help me to identify what type of misrepresentation or misuse have demonstrated by the statement below. Here
5 answers
483 views
What's the function?
x= 2, y=14 x=10, y=54 x=8, y=44 x=?, y=34 x=?, y=104 x=?, y=31 I thought it was multiply by 5, add 4 but
2 answers
908 views
In an experiment conducted by Young using sodium light with λ=589 nm, the slits are 1 μm wide. You notice that every fourth
2 answers
521 views
Are these examples of elastic/inelastic supply products correct?
Plane tickets: A plane ticket is an example of inelastic supply.
2 answers
680 views
Black southerners sought respect, land, and the rights of citizenship. What did freedom mean?
1 answer
350 views
Given the larger population runs in The States than in Canada, the costs are spread over more units. In fact in The States a
1 answer
389 views
Given the larger population runs in The States than in Canada, the costs are spread over more units. In fact in The States a
1 answer
429 views
Given the larger population runs in The States than in Canada, the costs are spread over more units. In fact in The States a
1 answer
442 views
These three questions I am having difficulty in solving. Can you help me here.
Question 1 - a) Whenever children in the United
4 answers
999 views
I have this one question that is giving me some trouble trying too figure out. Could one please help me with this one question.
B
3 answers
522 views
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