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Why are values of gravitational potential negative?

One way of defining potential is:The GPE per unit massWe define an infinite distance from the centre of our field to have zero potential, this means that energy needs to be provided to an object for it to...

HT
Answered by Harry T. Physics tutor
1434 Views

If you have 1.33g of oxygen (Mr = 32) in a container of volume 1000cm^3 at atmospheric pressure (101.3*10^3 Pa), what is the temperature of the gas in Celsius? R=8.314

T=20.2 degrees Celsius. Start by finding number of moles using n=mass/Mr so n=1.33/32=0.0416. Find the volume in m^3 using 1cm^3=110^-6 m^3 giving V=110^-3 m^3 then rearrange PV=nRT to get T=PV/n...

ET
Answered by Ethan T. Physics tutor
1200 Views

Why does the thermal stability of Group 2 carbonates increase down the group?

Going down the group, Group 2 carbonates decompose at increasingly higher temperatures.This is because the Group 2 metal ion radius/size increases down the group while the charge stays the same.This means...

SB
Answered by Saibhan B. Biology tutor
12471 Views

Integrate xsin(x) with respect to x

For this use integration by parts, letting the integral = T. Let u = x and dv/dx = sin(x). Differentiating u with respect to x gives du/dx = 1. Integrating dv/dx with respect to x gives v = - cos(x). Now,...

EM
Answered by Ethan M. Maths tutor
2691 Views

In mutations, what are the possible ways in which the DNA can be modified to make the proteins from which it is produced, non-functional or inactivated?

Protein production by the ribosome ultimately depends on the triplet sequence of DNA. Each triplet codes for one amino acid, thus, alterations in this triplet code will change the amino acid if it codes f...

Answered by Biology tutor
1664 Views

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