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Add Math Differentiation

Calculate the rate of change of radius of the water surface at the instant when the height of the water level is 9.6cm

Diagram 8 shows a conical-shapred container with diameter 18cm and height 16cm. Water is poured into the container at a constant rate of 4π cm^3 s^-1.
Physics Forces and Motion

What is the frictional force acting on the trolley and his friend if the tension of the rope, T is 400 N?

A) 53.6NB) 306.4NC) 346.4ND) 400.0N
Add Math Simultaneous Equation

What is the perimeter of the board?

Thanks for helping.
Add Math Permutation & Combination

Six members of a committee of a school are to be selected from 6 male teachers, 4 female teachers and a male principal. Find the number of different committees that can be formed if

 (a) the principal is the chairman of the committee (b) there are exactly 2 females in the committee(c) there are not more than 4 males in the committee.
Chemistry Chemical Formulae and Equations

Day 1 - Q1

[Day 1 Q1] This question is part of Board Stoichiometry Mania 2020. Answer this question now and stand a chance to win a pair of Apple Airpods!
Chemistry Chemical Formulae and Equations

What is the maximum volume of acid that can be added to aqueous sodium thiosulfate?

[Day 1 Q2] This question is part of Board Stoichiometry Mania 2020. Answer this question now and stand a chance to win a pair of Apple Airpods!
Chemistry Chemical Formulae and Equations

What is the mass of sulfur formed?

[Day 1 Q3] This question is part of Board Stoichiometry Mania 2020. Answer this question now and stand a chance to win a pair of Apple Airpods!
Chemistry Chemical Formulae and Equations

What is the formula of the hydrocarbon?

[Day 1 Q4] This question is part of BoardStoichiometry Mania 2020. Answer this question now and stand a chance to win a pairof Apple Airpods!
Chemistry Chemical Formulae and Equations

What is the total volume of gas collected at the end of the reaction?

[Day 1 Q5] This question is part of BoardStoichiometry Mania 2020. Answer this question now and stand a chance to win a pairof Apple Airpods!
Chemistry Chemical Formulae and Equations

Which of the following quantities is the same?

[Day 1 Q6] This question is part of Board Stoichiometry Mania 2020. Answer this question now and stand a chance to win a pair of Apple Airpods!
Chemistry Chemical Formulae and Equations

What is the concentration of acid required to react completely?

[Day 1 Q8] This question is part of Board Stoichiometry Mania 2020. Answer this question now and stand a chance to win a pair of Apple Airpods!
Chemistry Chemical Formulae and Equations

What could be X?

[Day 1 Q9] This question is part of Board Stoichiometry Mania 2020. Answer this question now and stand a chance to win a pair of Apple Airpods!
Physics Electricity

Which statement is correct about internal resistance, r of a dry cell?

A) The internal resistance, r depends on the current flow.B) Internal resistance, r can be calculated by using the formula r = (V − E)/IC) The resistance against the moving charge due to the electrolyte in the cellD) The work done by a source in driving a unit charge around a complete circuitChoose one correct statement ONLY.
Math Bearing

Find the bearing of M from K.

A) 028°B) 152°C) 332°D) 250°
Add Math Vectors

Given mi + 4/5j is unit vector for ki + 8j , find the possible values of m and k.

What is the value of m and k?
Chemistry Manufactured Substances in Industry

What is the difference of adding distilled water to the mixture compared to without adding it?

This is with reference to the reaction between sodium thiosulfate and sulphuric acid.Reference paper: https://board-edu.s3.ap-southeast-1.amazonaws.com/past-papers/spm/2019_Terengganu_Chemistry_K1.pdfYou can find more SPM Chemistry past papers here: https://boardedu.org/spm/past-papers/subjects/5
Add Math Integration

Calculate the area of the shaded region

How to calculate area of shaded region between the line and the arc?
Chemistry Carbon Compounds

Which of the structural formula of compound J?

Compound J is propyl ethanoate.
Physics Waves

When wind is blown against the surface of the rotating disc, a sound is produced. If the speed of rotation is increased, the sound wave produced will have...?

A) a lower frequencyB) a higher speedC) a higher pitchD) a higher sound quality
Math Matrices

Calculate the values of x and of y by using matrix method.

How to use matrix to solve simultaneous equation?
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