Terminal velocity is the final velocity an object achieves during freefall through a medium under the influence of gravity and upthrust from the medium. For example, dropping a tennis ball …
Answer:Mass (m)= 0.05kgVolume = 25cm^3Density=mass/Volume= 0.05kg/25cm^3=2000kg/m^3
All radio active decay is random. In any radioactive substance each specific nucleus has a chance of decaying at one specific point in time. However we can't predict when this …
The initial velocity, u, is 50 ms-1 The final velocity, v, is 60 ms-1 The acceleration, a, is 0.5ms-2 The question is asking us to find the …
Geostationary satellites are objects (usually machines) that orbit the Earth at exactly the same velocity as the rotation of the Earth (strictly, the orbital period of the satellite is equal …
1/Rt=1/R1+1/R2R1=3+5=8R2=4Rt=1/(1/8+1/4)=8/3 Ohms = 2.67 Ohms (2 D.P.)
When the object is launched into the air it has a kinetic energy proportional to its velocity squared. As it travels its energy is converted into gravitational potential energy as …
Use SUVAT. Height is 20m, initial speed is 0m/s, acceleration is 10m/s^2, and you need to find time. Therefore use s = ut + 1/2 at^2, and rearrange to get …
2.5 m/s2
Q = mc(T2-T1) = 14200(100-21) =331800.p = Q/tt = Q/pt = 331800/4740 ( not forgetting to convert from kW to W)t=70 seconds
Alpha radiation isn't very penetrating and so is absorbed and stopped by smoke particles. This causes a change in count rate when there is smoke present. This change in count …
The system consists of 2 reservoirs at different elevations, where the water can flow between them but through a hydroelectric power station. The higher elevation reservoir releases its water at …
specific heat capacity = change in energy ÷ (mass × change in temperature) [1]= 5,250 ÷ (0.250 × 5) [1]= 4,200 J/kg°C [1]
For this question we solve it using Charles’ Law. Charles’ law states that the product of volume and temperature gives a constant value. This is illustrated by VT=C. This means …
methodical approach to answering the question step by step:1) The length of the wire needs to be measured and varied (this is order to get a complete set of results …
They travel at the same speed (speed of light) in vacuum, and they can both be polarised.
The resistance of a filament lamp increases as the potential difference increases because the filament becomes hot. The movement of electrons (which is what causes the current) makes the atoms …
A transverse wave is a wave where the direction of vibration is perpendicular (90 degrees) to the direction of travel (an example would be a wave in the sea), and …
Heat is lost in the fluid through Conduction convection radiation and evaporation. The silvered surfaces reflect infrared rays back into the liquid keeping heat in the fluid reducing heat lost …
Newtons first law states that is an object is moving it will continue to do so in a constant direction and uniform velocity unless acted upon by an external force.Newtons …