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Shane
Questions and answers by
Shane
, page 2
Questions (271)
A light air craft takes off flying die north then turns and flies 11 000 metres due west.The plane then has a bearing of 340
5 answers
1,356 views
Name three environmental conditions that increases the rate of transpiration in plants,explaining how they operate:
2 answers
963 views
Explain why it is necessary for phloem to be alive to be functional,whereas xylem can function as dead tissue:
5 answers
6,264 views
Explain what is meant by source to sink flow in phloem transport.
2 answers
959 views
In angle ABC,angle A=angle B=32degree and AB=108 mm,find the perpendicular height from C to the baseAB.
3 answers
512 views
Describe two features of internal anatomy that distinguish monocot and dicot roots.
2 answers
605 views
Describe one benefit of the transpiration stream of a plant:
1 answer
402 views
After walking due west,turning and walking due south a man is 900 metres from his starting point and bearing 205 degrees from
4 answers
821 views
Two patrol boats M3 and M7 leave port at the same time.M3 heads due west and M7 on a bearing 227 degrees.After 30 minutes M7 has
5 answers
698 views
Explain what is meant by source to sink flow in phloem transport.
2 answers
516 views
Explain why a plant needs to move food around,particularly from the leaves to other regions:
3 answers
622 views
Mature phloem is a live tissue,whereas xylem is dead when mature.Explain why it is necessary for phloem to be alive to be
1 answer
1,123 views
Describe one benefit of the transpiration stream of a plant:
1 answer
422 views
Two walkers set off at the same time from a crossroad and walk along flat straight roads inclined to each other at 68 degrees.If
3 answers
1,147 views
A tourist viewing Sydney Harbour from a building 180 metres above sea level observes a ferry which is 850 metres from the base
4 answers
655 views
From an aircraft flying at 8000 metres above sea level the angle of depression of a ship is 36 degree15 minutes.How far is the
1 answer
393 views
The top of a T .V .tower casts a shadow 35 metres long when the angle of elevation of the sun 57 degree40 minutes.How high is
2 answers
563 views
A surveyor finds two points A and B on a hillside to be 114.6 metres apart(measured along the line of sight) and finds the angle
1 answer
410 views
From a point on a lighthouse 76 metres above sea level,the angle of depression of a fishing boat 28 degrees.How far is the boat
2 answers
485 views
(1) Use the thermodynamic values to (a) deduce the enthalpy change of each reaction (b)state if the reaction is exothermic,or
2 answers
558 views
An observer on top of a building 66 metres high,finds the angle of elevation to the top of a taller building to be 34
4 answers
1,186 views
A sample of 50 people in Harrisburg indicates that 10 people of them know the name of the mayor of their neighboring city. Out
2 answers
212 views
Using the exact trigonometric ratios of 45 degree,30 degree and 60 degree,evaluate the following,leaving where necessary your
2 answers
640 views
An aeroplane flies due north for 200 km and then turns due east and flies for a further distance of 325km. Find the bearing,to
2 answers
770 views
An airplane is flying at an altitude of 10,000m. The pilot sees two ships A and B. Ship A is due south of P and 22.5km away (in
2 answers
527 views
Using the complementary angle ratio results,find the value of x for the following. (a) cos(x+35)degree=sin x degree (b) sec x
1 answer
457 views
From an observer 0, the angles of elevation to the bottom and top of the flag pole are 36 degree and 38 degree respectively. The
4 answers
1,528 views
From an observer 0, the angles of elevation to the bottom and top of the flag pole are 36 degree and 38 degree respectively. The
1 answer
666 views
Explain the role of white blood cells in the body's defense against foreign substances.
3 answers
708 views
Explain what happens when a person with AB+ donates blood to a patient with A+ blood type?
1 answer
431 views
What are some of the treatments for coronary artery disease?
2 answers
628 views
Find all the values of theta between 0 degree and 360 degree, and state the quadrants in which they exist. (a)cos theta=-0.71
2 answers
704 views
Iam stuck with this question.Please anyone help me. An airplane is flying at an altitude of 10,000m.The pilot sees two ships A
2 answers
587 views
The average rate at which energy is conducted outward through the ground surface in a certain region is 30.9 mW/m2, and the
2 answers
931 views
A tower T is observed from two points A and B which are 240 metres apart. The angle TAB is found to be 57degree and the angle
4 answers
541 views
Please help me. P and Q are two gun placements 1250m apart. T is a target. The angles TPQ and TQP are 73 degree 24' and 68
3 answers
331 views
Please I need help.Iam stuck with this question.Using sine and cosine rule: A rocket launced vertically from L is observed from
2 answers
957 views
An aircraft which is maintaining a constant altitude of 1000 metre is travelling directly away from an observer. At a particular
1 answer
407 views
Find the area of the triangle with sides 8.6 cm, 9.1cm and 9.7cm. First find the size of one of the angles.
1 answer
348 views
AB is a 12 metre flagpole on top of a building. Given angle QPB=56 degree 37' and angle QPA=43 degree 19',find the distance of
1 answer
425 views
Please help me.Iam stuck. Find all the possible values of theta between 0 degree and 360 degree for the following quadratic
1 answer
405 views
Please help me.Iam stuck. Find all the possible values of theta between 0 degree and 360 degree for the following quadratic
1 answer
423 views
Ship A is 18.5km from a port P on a beearing of 045 degree and ship B is 26.4km from point P on a bearing of 105 degree.
3 answers
599 views
Please help me simplify this and show full working out. (a) (2x^3 divide 3y^4)^2 multiply (x divide 3y)^-2 (b) a-a^-1 divide a^2
2 answers
553 views
Please I need help.Show full working out. (a) sin x cot x= cos x (b) (1 + tan theta)^2 + (1- tan theta)^2 = 2sec^2theta
2 answers
1,049 views
Proof this identities. (a) sin x cot x = cos x
1 answer
339 views
Solve this equation. 3^2x - 3^x+2 = 3^x - 9
1 answer
265 views
Solve this logarithmic equation. 3 log 2 base x + log 18 base x = 2
1 answer
369 views
Solve this logarithmic equation. 3 log 2 base x + log 18 base x = 2
1 answer
353 views
solve this equation. log (2x + 1) base 2 = -3
1 answer
251 views
I have no more than five books in my bag.
I need to write an inequality for this, x<5 ?
10 answers
1,935 views
Write the expression in terms of sine only.
8(sin 2x − cos 2x)
3 answers
2,748 views
When 9.08 times 10^5 grams (one ton) of sodium chloride are electrolyzed in the commerical production of Chlorine, 5.24 times
1 answer
362 views
When 9.08 times 10^5 grams (one ton) of sodium chloride are electrolyzed in the commerical production of Chlorine, 5.24 times
1 answer
428 views
One step of the Ostwald process for manufacturing nitric acid involves making nitrogen monoxide by oxidizing ammonia in the
2 answers
984 views
Find two geometric progression having: 2 as second term and 1458 as eight term,
3 answers
760 views
If the nth term of a sequence is 3 x 2^n-1, Write down the first three terms.
3 answers
486 views
Given the f (x) =2x^3 + ax^2 + bx - 9. (a)Find the value of a and b if f (x) has a factor x -3 but leaves a reminder of 8 when
1 answer
334 views
The third term of a sequence is 2(2/3) and the sixth term is 9. Find the first six terms when the sequence is; (a) arithmetic
1 answer
682 views
Find the total amount required to pay off a loan of 16000 plus interest at the end of 8 years if the interest is compounded
2 answers
500 views
Find two geometric progressions having: 54 as third term and 27/32 as ninth term.
3 answers
909 views
The position vector of the point A(3,4) relative to an origin O is a. (a) Express vector a or (OA) in terms of i and j. (b) Find
3 answers
818 views
Calculate the [H], [OH], pH and the pOH of this solution; 0.0025 M NaOH
2 answers
992 views
A surveyor measures the angle of elevation of the top of the mountain from a point (P) at sea level as 30 detre along a track
1 answer
752 views
ABC is the segment of a circle with center O. This segment is enclosed in a rectangle APQC. Given that AC = 32 cm and AP = 8 cm,
3 answers
1,106 views
Determine the [H+] when [OH-] is 2.0 times 10^-2 mole.dm-3.
2 answers
723 views
A solution container was only label 0.005M. When phenolphthalene was added onto the solution, the color of the solution turned
1 answer
456 views
1. In the following reactions, identify which reactants are the oxidizing agent and which are the reducing agents.
a. 2S2O32-
2 answers
671 views
Pls help me to show that (1+root x)^5= 10 root x + 20x root x + 2x^2 ]oot x.
1 answer
338 views
Obtain the binomial expansion of (2-x) (1+1/2x)^8 in ascending powers of x as far as the term in x^3. Use your result to
4 answers
1,223 views
Expand (1+2x)^20 - (1-2x)^20) in ascending powers of x up to the term in x^5 and use this result to evaluate (1.02)^20 -
3 answers
482 views
Expand (1-6x)^4 (1+2x)^7 in ascending powers of x up to and includeing the terms in x^3.
3 answers
664 views
In the expansion of (1-2x)^11 the coefficient of x^3 is k times the coefficient of x^2. Evaluate k.
1 answer
432 views
Expand (1-x)^4. Hence find S if S = (1-x^3)^4 - 4(1-x^3)^3 + 6 (1-x^3)^2 - 4(1-x^3) + 1.
3 answers
537 views
Find the expansions of (1-x)^6 and (1+2x)^6 as far as the terms in x^3. Hence expand (1+x-2x^2)^6 up to the terms in x^3.
1 answer
321 views
This balance equation shows the burning of octane in air. 2C8H18 + 25O2 ----> 16CO2 + 18H2O. How many grams of carbondioxide
2 answers
807 views
Find the ratio of the coefficients of the 4th and 6th terms in the expansion of (1 + 2x)^16
3 answers
484 views
Find the indicated term for (1-2x)^10, middle term.
3 answers
412 views
Find the course and ground speed if Track 150 degree, airspeed 400km/h; wind 040degree, 30km/h.
1 answer
273 views
Find the wind velocity if course 060 degree, airspeed 250km/h; track 040 degree, ground speed 260km/h.
1 answer
297 views
What would be the product formed for electrolysis of copper sulphate between the electrodes (a) Platinum (b) Copper and NaCl
1 answer
440 views
0.2 Faradays of electricity were passed through solutions of sulphuric acid. Calculate the volume of hydrogen evolved at s.t.p
2 answers
527 views
A circle x^2 + y^ + 2x - 2y -1 = 0 expressed in the following form (x-h)^2 + (y-k)^2 = r^2 where h, k are the coordinates of the
1 answer
380 views
A circle x^2 + y^ + 2x - 2y -1 = 0 expressed in the following form (x-h)^2 + (y-k)^2 = r^2 where h, k are the coordinates of the
1 answer
411 views
Find the two stationary points on the curve when y = 2x/x^2 + 1
3 answers
1,626 views
Sine and Cosine rule are both used in solving trigonometry problems.Give an example of when the cosine rule is more appliciable
2 answers
1,136 views
Find the line that is perpendicular to y = -3/4 x + 2 and passes through (3,4).
2 answers
911 views
Does the parabola y = -3x^2 + 2x - 1 have a maximum or minimum value?
2 answers
1,010 views
Find dy/dx if y = 1/8.
1 answer
290 views
The length of a rectangle is 10cm greater than its width. The perimeter of the rectangle is 1m. Find the simplest expression for
1 answer
489 views
The relationship between the vertical height and the horizontal distance of a ball thrown at 45 degree is given by the equation
2 answers
974 views
Calculate the arc length that subtends an angle of 55 degree at the centre of a circle with radius r = 5cm.
4 answers
1,964 views
When the function f(x) is equal to 2xn + ax2 - 6 is divided by (x-1), the reminder is -7 and when divided by (x+3), the reminder
1 answer
363 views
One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take two pumps,
1 answer
441 views
If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will
3 answers
702 views
Construct the table of values for the following equation 1 - 3x = 2y for -4<x <4. Use the answer to sketch the graph.
2 answers
661 views
Show by calculations weather the following lines are parallel or not.. y + 5x = 1 and 0.2 = y - 5.
1 answer
394 views
Solve 2y - 5x = 3 and x + y = 5 using substitution.
1 answer
398 views
What is the value of p if the line (3p + 1)x - 2y = 6p is perpendicular to the line 2x - y + 1 = 0
1 answer
307 views
What is the equation of the line which has gradient 2, and passes through midpoint of (3,4) and (5,6)
1 answer
456 views
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