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A ball, dropped vertically, falls d metres in t seconds. d is proportional to the square of t. The ball drops 45 metres in the first 3 seconds. How far does the ball drop in the next 7 seconds?

First we form equations from the information given in the question. The first equation we can form is that d is directly proportional to the square of t. This means that d = kt2 ,where k is a ...

Answered by Maths tutor
5468 Views

What do we mean by the phrase "être verbs" when using the perfect tense in French?

When using the perfect tense in French, there are three components to a phrase. The first is the pronoun (I, you, he/she, we, they). The second is the auxiliary verb, and the third is the past participle....

KB
Answered by Kathryn B. French tutor
2215 Views

Explain why the velocity of a car moving at a constant speed around a bend changes.

Velocity is a vector quantity, that is, it is fully described by magnitude and direction. Even though the car moves at a constant speed, its direction varies as it moves around the bend. Since there is a ...

NA
Answered by Nicholas A. Physics tutor
11544 Views

If 350gNaCl is dissolved in water and made up to a volume of 3dm^3, calculate the concentration of the solution.

Moles= Mass/Mr Mol (NaCl)= 35/(23+35.5)=350/58.5=0.6Concentration= Moles/volumeConc(NaCl)= 0.6/3=0.2mol/dm3

LP
Answered by Lucy P. Chemistry tutor
2808 Views

The perimeter of a right-angled triangle is 60 cm. The lengths of its sides are in the ratio 3 : 4 : 5. Calculate the area of the triangle.

We are given ratios of side lengths and the total perimeter. The perimeter of the triangle is simply the sum of the side lengths. Imagine that the sides are made up of "units": 3 times a unit + ...

VN
Answered by Viktoria N. Maths tutor
3151 Views

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