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A phone is knocked off a table 800cm of the ground. If the phone is 650g a) what is the gravational potential of the phone? b)what speed will the phone hit the floor at? c)How long will it take for the phone to hit the floor?

UNITS - SI UNITS: 800cm --> 0.8m 0.65kg a) Ep= mg(change) height Ep=0.65kg * 9.81m/s 2 * 0.80m Ep=5.10 Joules (J) b) Gravational Potential = Kinetic energy Ek = 1/2 mv 2 v=Sqrt(Ep/0.5m) v=sqrt(5.10/0.5*0....
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Answered by Julia J. • Physics tutor
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Name a product of photosynthesis?

Glucose Oxygen
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Find the exact solutions for 4 − x^2 = |2x − 1|

x=-1 x=-1+6 0.5
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Answered by Shroya V. • Maths tutor
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What is Pythagoras' Theory?

Pythagoras' Theory explains that the length of sides in a right angled triangle are related. This means we can use the length of two sides to find that of the third! The relationship he found is a 2 + b 2 = ...
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Answered by Alexander R. • Maths tutor
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What is a confidence interval?

Using the normal distribution, we can estimate a range of values which we expect to contain the mean. For example, if we take a sample of 30 students height, we can estimate the mean height of students in th...
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Answered by Alexander R. • Maths tutor
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