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A stone was thrown with velocity 20m/s at an angle of 30 degrees from a height h. The stone moves under gravity freely and reaches the floor 5s after thrown. a) Find H, b)the horizontal distance covered

To find the height we first need to find the initial vertical velocity of the stone. This will be equal to 20 * sin(30) = 20 0.5 = 10m/s. From here we can use SUVAT. In this case s=-h,u=10m/s, v is unknown, ...
DH
Answered by Dominic H. • Maths tutor
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Outline Bowlby's theory of infant attachment (6 marks)

Bowlby studied infant attachment systems and was a key figure in developmental psychology. As an evolutionary psychologist he believed attachment was based on innate systems. One good example of a mechanism ...
ML
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express the following fraction in the form of m + (n)^1/2. the fraction is ((3*(5)^1/2)^2 - 7)/(3 + 7*(5)^1/2). where m,n are real numbers.

first of all you would see that at the bottom of the fraction it is not an integer so first of all you would need to rationalise the denominator. the denominator is the bit at the bottom of the fraction. You...
HC
Answered by Hugh C. • Maths tutor
3828 Views

Why does my set work only partially conform to Sonata Form?

Sonata form is so ubiquitous throughout GCSE and A level studies than many students misunderstand—or are never taught—that it is but one example of multiple ways to analyse any piece of music. This might see...
LL
Answered by Lazar L. • Music tutor
3988 Views

Suppose that you go to a party where everyone knows at least one other person, you get a bit bored and wonder whether there are at least two people which know the same number of people there.

To get our head around a problem like this is always very useful to think of a few examples. First supposed that this party is a bit borining and there are only 2 people, then by assumption they know each ot...
AS
Answered by Andrea S. • Maths tutor
4256 Views