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#### Resources tagged with physics similar to The Knapsack Problem and Public Key Cryptography:

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##### Other tags that relate to The Knapsack Problem and Public Key Cryptography
chemistry. Mathematical modelling. physics. biology. Place value. Divisibility. Modulus arithmetic. Real world. Index notation/Indices. Number bases.

### There are 81 results

Broad Topics > Applications > physics

### Big and Small Numbers in Physics - Group Task

##### Stage: 5 Challenge Level:

Work in groups to try to create the best approximations to these physical quantities.

### Physnrich

##### Stage: 4 and 5 Challenge Level:

PhysNRICH is the area of the StemNRICH site devoted to the mathematics underlying the study of physics

### Chemnrich

##### Stage: 4 and 5 Challenge Level:

chemNRICH is the area of the stemNRICH site devoted to the mathematics underlying the study of chemistry, designed to help develop the mathematics required to get the most from your study. . . .

### Ramping it Up

##### Stage: 5 Challenge Level:

Look at the calculus behind the simple act of a car going over a step.

### Guessing the Graph

##### Stage: 4 Challenge Level:

Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?

### The Not-so-simple Pendulum 1

##### Stage: 5 Challenge Level:

See how the motion of the simple pendulum is not-so-simple after all.

### Neural Nets

##### Stage: 5

Find out some of the mathematics behind neural networks.

### Moving Stonehenge

##### Stage: 5 Challenge Level:

A look at the fluid mechanics questions that are raised by the Stonehenge 'bluestones'.

### Core Scientific Mathematics

##### Stage: 4 and 5 Challenge Level:

This is the area of the advanced stemNRICH site devoted to the core applied mathematics underlying the sciences.

### Engnrich

##### Stage: 5 Challenge Level:

engNRICH is the area of the stemNRICH Advanced site devoted to the mathematics underlying the study of engineering

### Whose Line Graph Is it Anyway?

##### Stage: 5 Challenge Level:

Which line graph, equations and physical processes go together?

##### Stage: 4 and 5 Challenge Level:

Advanced problems in the mathematical sciences.

### Go Spaceship Go

##### Stage: 5 Challenge Level:

Show that even a very powerful spaceship would eventually run out of overtaking power

### Drug Stabiliser

##### Stage: 5 Challenge Level:

How does the half-life of a drug affect the build up of medication in the body over time?

### Reaction Types

##### Stage: 5 Challenge Level:

Explore the rates of growth of the sorts of simple polynomials often used in mathematical modelling.

### New Units for Old

##### Stage: 5 Challenge Level:

Can you match up the entries from this table of units?

### Universal Time, Mass, Length

##### Stage: 5 Short Challenge Level:

Can you work out the natural time scale for the universe?

### Mach Attack

##### Stage: 5 Challenge Level:

Have you got the Mach knack? Discover the mathematics behind exceeding the sound barrier.

### Escape from Planet Earth

##### Stage: 5 Challenge Level:

How fast would you have to throw a ball upwards so that it would never land?

### Whoosh

##### Stage: 5 Challenge Level:

A ball whooshes down a slide and hits another ball which flies off the slide horizontally as a projectile. How far does it go?

### Stemnrich - Technology

##### Stage: 3 and 4 Challenge Level:

This is the technology section of stemNRICH - Core.

### Lunar Leaper

##### Stage: 5 Challenge Level:

Gravity on the Moon is about 1/6th that on the Earth. A pole-vaulter 2 metres tall can clear a 5 metres pole on the Earth. How high a pole could he clear on the Moon?

### Which Twin Is Older?

##### Stage: 5

A simplified account of special relativity and the twins paradox.

### Constantly Changing

##### Stage: 4 Challenge Level:

Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.

### Cannon Balls

##### Stage: 5 Short Challenge Level:

How high will a ball taking a million seconds to fall travel?

### A Question of Scale

##### Stage: 4 Challenge Level:

Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

### Cobalt Decay

##### Stage: 5 Challenge Level:

Investigate the effects of the half-lifes of the isotopes of cobalt on the mass of a mystery lump of the element.

### The Lorentz Force Law

##### Stage: 5 Challenge Level:

Explore the Lorentz force law for charges moving in different ways.

### Levels of Bohr

##### Stage: 5 Challenge Level:

Look at the units in the expression for the energy levels of the electrons in a hydrogen atom according to the Bohr model.

##### Stage: 5 Challenge Level:

A look at a fluid mechanics technique called the Steady Flow Momentum Equation.

### Striking Gold

##### Stage: 5 Challenge Level:

Investigate some of the issues raised by Geiger and Marsden's famous scattering experiment in which they fired alpha particles at a sheet of gold.

### Lennard Jones Potential

##### Stage: 5 Challenge Level:

Investigate why the Lennard-Jones potential gives a good approximate explanation for the behaviour of atoms at close ranges

### Ideal Gases

##### Stage: 5 Challenge Level:

Problems which make you think about the kinetic ideas underlying the ideal gas laws.

### Big and Small Numbers in Chemistry

##### Stage: 4 Challenge Level:

Get some practice using big and small numbers in chemistry.

### Gravity Paths

##### Stage: 5 Challenge Level:

Where will the spaceman go when he falls through these strange planetary systems?

### Pumping the Power

##### Stage: 5 Challenge Level:

What is an AC voltage? How much power does an AC power source supply?

### The Amazing Properties of Water

##### Stage: 4 and 5 Challenge Level:

Find out why water is one of the most amazing compounds in the universe and why it is essential for life. - UNDER DEVELOPMENT

### Diamonds Aren't Forever

##### Stage: 5 Challenge Level:

Ever wondered what it would be like to vaporise a diamond? Find out inside...

### The Power of Dimensional Analysis

##### Stage: 4 and 5

An introduction to a useful tool to check the validity of an equation.

### Ancient Astronomical Terms

##### Stage: 3, 4 and 5

Some explanations of basic terms and some phenomena discovered by ancient astronomers

### Sweeping Satellite

##### Stage: 5 Challenge Level:

Derive an equation which describes satellite dynamics.

### Eudiometry

##### Stage: 5 Challenge Level:

When a mixture of gases burn, will the volume change?

### Ideal Axes

##### Stage: 5 Challenge Level:

Explore how can changing the axes for a plot of an equation can lead to different shaped graphs emerging

### The Not-so-simple Pendulum 2

##### Stage: 5 Challenge Level:

Things are roughened up and friction is now added to the approximate simple pendulum

### The Ultra Particle

##### Stage: 5 Challenge Level:

Explore the energy of this incredibly energetic particle which struck Earth on October 15th 1991

##### Stage: 5 Challenge Level:

Can you arrange a set of charged particles so that none of them start to move when released from rest?

### Modelling Assumptions in Mechanics

##### Stage: 5

An article demonstrating mathematically how various physical modelling assumptions affect the solution to the seemingly simple problem of the projectile.

### Pack Man

##### Stage: 5 Challenge Level:

A look at different crystal lattice structures, and how they relate to structural properties