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Questions (48)
What mass of methane is burnt off completely by 224cm3 of oxygen?
0 answers
364 views
A meter rule AB of mass 0.2kg was balanced horizontally on a single support when loads of 0.1kg and 0.08kg were placed at a
0 answers
759 views
when the temperature of 4 dm3 of an ideal gas is increased from 200K to 400K and the pressure is halved, caculate the volume of
1 answer
2,268 views
If in an investment, a man can make profit of 5,000 with probability of 0.8 or loss 1,000 with probability of 0.2, what is the
0 answers
461 views
1. Expand and simplify
a) (2-x)^-2 b) (2+x)^-2 c) General formula for i) (x+y)^-n ii) (x-y)^-n iii) (x+y)^1/n iv) (x+y)^n/m v)
2 answers
502 views
A cuboid has a diagonal of length 9 cm and a square base of side 4cm. What is its height?
1 answer
1,025 views
Solve the inequality: 3(x+1) < 5(x+2) = 15?
1 answer
965 views
1 + root 2/ 2- root 3?
1 answer
374 views
A solid weighs 10.5N in air and weighs 55N when immersnd in a liquid of density 900kgm-3. calculate the volume of the solid.?
1 answer
635 views
A man spend 3/4 of his salary on food,rent and transport and 1/10 of the remainder on clothes.what percentage of his salary is
1 answer
850 views
1) the 1st digit of the square of the second digit
2) the sum of the 2nd and the 3rd digit is 4 3) if the 4th digit is equal to
1 answer
1,710 views
A ship,A moves due north at a speed of 30km/h while a second ship B moves at a speed of 20km/h on a bearing of 300' determine
(a)
4 answers
659 views
"What is the phase difference of a progressive wave [y=0.5sin(2πx-60t] with a phase shift from (-2,0)to(1.5,0)"?
2 answers
531 views
In a certain university,the faculties A , B , C , D and E account for 15%, 20%, 25%, 10%, and 30%,respectively ,for the total
1 answer
465 views
1. The equilibrium constant for a certain system is 50 at 25 celsius. Calculate the free energy change
2. When the fee energy
0 answers
521 views
Solve the equation 17=3x(x-5) correct to 2d.p?
1 answer
482 views
A piece of copper of mass 40g at 200°C is placed in a copper calorimeter of mass 60g containing 50g of water at 10°C. Ignoring
3 answers
3,070 views
4 ways of reducing/preventing heat losses from a liquid in a calorimeter?
0 answers
405 views
What is the percentage by mass of water of crystallization in a molecule of Na2co3.10h2o?
1 answer
733 views
how many moles of ammonia are produced by 2.8mol of hydrogen?
1 answer
855 views
The binding energy of helium 4 He is
2 [atomic mass of proton = 1.00783U, atomic mass of neutron = 1.00867U] how do you calculate
0 answers
563 views
a bullet of mass 120g is fired horizontally into a fixed wooden block with a speed of 20 m/s. If the bullet is brought to rest
5 answers
2,597 views
Find the volume of R if logR+logR^2+LogR^4+LogR^8+LogR^16+LogR^32=63?
1 answer
380 views
"What can we do to improve sanitation and clean water for those who lack access to a plumbing system?"Content should be more
1 answer
468 views
A curve y has gradient Dy/dx=3x^2-6x+2a)if the curve passes through the origin find it equation b)Find the area of the finite
2 answers
1,260 views
water is pump from lake by an engine at a height of 5m above the lake surface.
if the water is discharged through a nozzle of
1 answer
584 views
A ball is moving at 18ms -1 in a direction inclined at 60° to the horizontal. the horizontal componet of its velocity is?
1 answer
721 views
A B & C contributed #8000, #6000, #4000 respectively as capital to an enterprise. Out of the total profit, C received #500 for
1 answer
557 views
As the molecular complexity of the homologues increases
a) the boiling point decreases in the same direction b) the density
0 answers
473 views
out of 72 students on a track team, 34 are boys what fractional past of the team are girls?
1 answer
824 views
calculate the energy stored in a stretched spring constant 10000Nm-1(newton per metre)when a force of 200N is applied to it's
1 answer
558 views
vector + vector?
1 answer
406 views
solve the equation 35x-2x^2=0?
1 answer
478 views
In a class of 20 students, 8 drink cocoa, 13 drink fanta and 5 drink cocoa only, how many do not drink cocoa fanta.?
3 answers
813 views
Indicate which type of reaction this belongs to
1) interaction of iron and steam in a closed solution 2) the action of chlorine
0 answers
610 views
1. Solve 5x*6×5*3*x-4
2. 3*4y*5 ×9*-2y*-2 3. 16x*5-4*-2x*3×(2x*2)*-3?
3 answers
624 views
A string under tension produces a note of frequency 14Hz. Determine the frequency when the tension is quadrupled????
1 answer
806 views
(1).The resistance of wire is giving by the relation Rt=Ro(1 alpha t Bt^2)
T is the temperature alpha & Bt^2(beta) are constant
0 answers
929 views
Using the simultaneous or matrix method to solve the following:
(1) 450alpha 4500B(beta).......eqn(2) (2) 2000.7alpha
0 answers
736 views
What is the least active excretory organ in mammals?
please give the reason for your answer.
2 answers
694 views
The maximum permissible current through a galvanometer (G) of resistance 10ohmams is 0.05A. A resistance (R) is used to convert
2 answers
739 views
You may not have heard the last word on the matter ...... ?
A. may you have B. haven't you C. have you D. mayn't have you just
1 answer
426 views
Choose the option that has the same vowel sound as the one represented by the letters underlined.
boat? A. board B. bought C. go
3 answers
976 views
which of the following is the entropy change positive?
A. Thermal dissociation of ammonium chloride B. Reaction between an acid
2 answers
1,021 views
(1) define the term metallic lustre and nonmetallic lustre ?
(2) highlight the different between them as well as given two
1 answer
417 views
an ammeter of resistance 0.1ohms has a full scale deflection of 50mA .
Determine the resultant full scale deflection of the meter
2 answers
1,405 views
please answer these question and explain.
One of the women who ...... in the premises ...... been ordered to quit? A. sells /
2 answers
495 views
solve these
⅛ /¾?
1 answer
366 views
Answers (2)
x is just the normal x while the * is multiplication.
thanks.
