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A particle is moving along a straight line. The displacement of the particle from O at time t seconds is s metres where s = 2t^3 – 12t^2 + 7t. Find an expression for the velocity of the particle at time t seconds.

To find the velocity function of a particle when given its displacement function, you must differentiate the given function. v = 6t^2 - 24t + 7 .Similarly, to get the displacement function from the veloci...

AL
Answered by Andrew L. Maths tutor
6299 Views

David left his basketball outside overnight. At 1am the volume of air within the ball was 1.2m^3 and the outdoor temperature was 5 degrees Celsius. At 3am the temperature was -7 degrees Celsius. What is the volume of air inside the ball at 3am?

For this question we solve it using Charles’ Law. Charles’ law states that the product of volume and temperature gives a constant value. This is illustrated by VT=C. This means that volume and temperature...

SK
Answered by Skye K. Physics tutor
1905 Views

"The main reason for the Norman victory at Hastings was their superior tactics." How much do you agree with this argument? Explain your reasoning

Always be sure when approaching these questions to know a few things of what the question wants. "Main reason", "Norman victory", "superior tactics". By brea...

QG
Answered by Quinn G. History tutor
5062 Views

Solve the simultaneous equations: x^2 + y^2 = 5 and y = 3x + 1

x2 + y2 = 5 1y = 3x + 1 2Inserting 2 into 1: x2 + (3x +1)2 = 5 Expanding the brackets: x2 + 9x2 + 3x +...

SB
Answered by Sophie B. Maths tutor
5820 Views

A jug containing 0.250 kg of liquid is put into a refrigerator. Its temperature decreased from 20°C to 15°C. The amount of energy transferred from the liquid was 5,250 J. Calculate the specific heat capacity of the liquid.

specific heat capacity = change in energy ÷ (mass × change in temperature) [1]= 5,250 ÷ (0.250 × 5) [1]= 4,200 J/kg°C [1]

BP
Answered by Benjamin P. Physics tutor
1627 Views

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