1st Law - a body will move with constant velocity or remain at rest unless acted on by a resultant force2nd Law - F = ma. The rate of …

They're both the same. The feathers would take up a lot more space though! Feathers have a lower density than lead (i.e. for the same volume, feathers are less heavy). …

They would hit to ground at the same time. This is because they would both accelerate to the ground at 10m/s^2 due to gravity regardless of what their mass is. …

Kinetic Energy, EK=(1/2)mv^{2}. Energy is conserved, so the work done by the brakes, W, must be equal to the change in kinetic energy of the car, ∆EK. Therefore: …

The three main types of radiation are alpha, beta and gamma radiation. Alpha particles are the largest, two protons and two neutrons bound together (so they have a +2 positive …

First, we must calculate the amount of time spent using the whisk in one week:4 x 7 = 28 hours a weekNext we calculate the power used; as the whisk …

Consider an object in free fall through the atmosphere. Firstly, we need to consider the forces acting on the object. A force diagram will help here. Weight acts from the …

When the string is cut:Gravitational potential energy is converted to kinetic energy.Kinetic energy is converted to elastic potential energy.Elastic potential energy is converted to kinetic energy (and heat energy)Kinetic energy …

Both the speed and the velocity show us how fast something is moving (the rate at which it changes its position). However, velocity is a vector quantity, which means it …

total resistance for resistors in series is the addition of the resistances therefore the two 3 ohm resisters in series totals 6 ohms resistors in parallel follow the equation : …

Cosmic microwave background is a very faint level of microwave radiation filling all of space, and coming from all directions. The cosmic microwave background is useful to physicists as it …

This is a question relating to turning forces, known as moments. For the seesaw to be balanced the moment caused by the 50kg boy must be equal and opposite …

Ohms law establishes a relationship between resistance, voltage and current, saying that V/I = R. The traditional graph given for ohmic resistors is:An increasing line with gradient x starting at …

1.Moment=Force x Distance2.Convert mass into weight (x9.81)3.Times the weight by the distance from the pivot point.4.If done correctly the answer should be 49.06NKg …

Ohms law establishes a relationship between resistance, voltage and current, saying that V/I = R.

Let's suppose tomorrow we want to go to the Moon. There's many different paths that we can choose from to get there: we can depart from Earth, go around the …

Either from memory or using the formula booklet provided we know Work Done = Force x Distance Moved (in the direction of the force). Therefore we can use the values …

Refraction is what occurs when light passes from one medium to another (for example, air to water) and because of the difference in the medium, the speed changes. This change …

Evaporation occurs when the most energetic particles in a liquid have enough energy to overcome the attractive intermolecular bonds and leave the liquid. Because only the hughest energy particles evaporate …