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A 1kg spring has an unloaded length 10cm and has an elastic constant of 100N/m. It is compressed to 6cm then placed facing upwards on the floor. When released it travels vertically upwards. How high does it jump? You may assume no energy is lost to heat o

This may at first look like a horrible SUVAT problem, but it is actually testing your ability to calculate energy transfers. It is helpful for these questions to first draw a diagram then work out what en...

Answered by Philip W. • Physics tutor

3373 Views

What is an ohmic resistor? How to check if a resistor is ohmic?

An ohmic resistor is a resistor that obeys Ohm's law V = IR (voltage = current x resistance). Therefore, if the voltage in such element is increased by n number of times, by the same number n has to incre...

Answered by Jonas V. • Physics tutor

32757 Views

What's the difference between velocity and speed?

Velocity and speed and vector and scalar quanities respectively. Vector quantities have both direction and magnitude (size), whilst scalars only have magnitiude. It is important to distinguish between the...

Answered by Mollie S. • Physics tutor

2330 Views

In a particle accelerator, you accelerate an electron. Afterwards, you measure it's energy to be 350 keV. Tell my why you can't find the speed from this energy using your knowledge of classical mechanics.

In order to see what the problem is, I will attempt to find this speed. 350keV=5.6110^-14 J E_k=1/2 * mv² => v=sqrt(2E_k/m) By plugging in numbers, we...

Answered by Cezar P. • Physics tutor

2069 Views

What is the mathematical relationship between the frequencies of musical notes that we perceive identical, but at different octaves?

Humans have a logarithmic perception of the majority of uncountable and some countable things. A₀, which is percieved as the basic note, has a frequency of 27.50 Hz. A₁=55 Hz, and A<...

Answered by Cezar P. • Physics tutor

2829 Views