Stored chemical energy from food is converted into kinetic energy (ke) as the person runs. As they are running uphill, the chemical energy is also converted into gravitational potential energy …
The force of resistance should be taken away from the driving force to result in a total force of 900N driving forwards.Then use F=ma, rearranged so that a = F/m, …
First, we need to see what the important information in this problem is: the mass of the student is irrelevant as the problem focusses on the ball. So we now …
Radio waves
I will draw this on the whiteboard function.
When the skydiver first steps out of the plane, she accelerates downwards at a high rate. At first the resultant force on her is large since gravity pulls her down, …
This is the amount of energy needed to heat 1kg of the material by 1 degree: ENERGY to heat a MASS by a TEMPERATURE INCREASE.Usingstandard units:Energyis in Joules [J]Massis …
Kinetic energy is given by the equation:K.E. = 0.5mv2Therefore Matt has Kinetic energy:K.E. (Matt) = 0.5*(60)(5)2 = 750JAnd Rob has Kinetic energy:K.E. (Rob) = 0.5(30)*(5) …
To answer this question we need to know what makes glass different to air. The main difference is their refractive index. For air it's 1 and for glass it's anywhere …
The moderator material is generally graphite or water. These materials do not absorb or react with the neutrons, they simply act to slow down fast moving neutrons. If neutrons are …
Conduction, where particles within a conductor gain energy as they heat up and vibrate more vigorously passing energy onto adjacent particles as they collide. Convection, which only occurs in fluids, …
First, we resolve the forces. So, if we take the positive direction to be the direction in which it is pulled, we get a force of +50N, and the friction …
For this, we use the conservation of energy. We know that loss of kinetic energy = gain in potential energy, so KE = PE. Our equation is 0.5mv …
Absorption spectra from distant galaxies consist of bands of coloured light crossed with black lines. The wavelengths of these black lines are shifted towards the red end of the spectrum …
Note consider what type of heat loss is occurring1a) key word suggest Runner covered in sweat, when this evaporates it will reduce surface temperature (1)b) key word explain, remember …
The fusing red giant shell drifts away form the core forming planetary nebula. Leaving only very hot core (white dwarf) (1) The core is hotter than the shell , the …
Cobalt and Nickel
To answer this, you need to pick up on the clues in the question. "Ohmic conductor" is explicitly mentioned twice, so this is likely to be important. You should know …
Red-shift is the increase in wavelength emitted from distant objects moving away from the observer, making them appear more red.The Big Bang Theory states that the universe began from a …
The kinetic energy of the moving car will be converted to gravitational potential energy as it travels up the ramp. At the point that the car will jump, KE = …