A 1000 kg car is travelling at 72 km/h when the brakes are applied. It comes to a stop in a distance of 40m. What is the average braking force of the car?
I seriously have no idea how to do this. Any
The intensity level in a truck is 93.0 dB. What is the intensity of this sound? ___mW/m2
A pair of in-phase stereo speakers is placed side by side, 0.58 m apart. You stand directly in front of one of
a boy on a bike ROLLS down a hill to a cliff over water. the hilltop was 50 meters above the cliff and the cliff was 25 meters above the water. how far away does he land in the water?-the hilltop was
background info...an intro into electrical safety-Too much current through a conductor generates heat faster than the conductor can dissipate it.
So the conductor gets hotter and hotter and hotter...
A 5.00A current runs through a 12 gauge copper wire (diameter 2.05 mm) and through a light bulb. Copper has8.5*10^28 free electrons per cubic metre.
a) How many electrons pass through the light bulb
the speed of waves travelling along a wire under tension is 450ms-1. if the wire is fixed at ends 0.75m apart, what is the lowest standing wave-frequency that can be heard? (in Hz)
please explain you
Two gases A and B are held at the same temperature. One of the gases is diatomic, and the other is not. It is found that the ratio of the rms speeds of the two gases is:
V(a)/V(b) = 0.7143
Find the m
The main particles (that can contaminate beings and things) produced in a nuclear reactor are as follows;
(In decreasing order of weight)
(1) Trtium particle;
(2) Alpha Particle;
(3) Neutrons;
(4
Sodium-24 has a half-life of 15 hours. How much of a 30g sample will remain undecayed after one day?
I know its really easy but have completely forgotten how to do these, working out would be apprec
So far I think the smallest proven particle is a Neutrino.
It is so small that it can pass through the entire earth without colliding with any of the atoms because atoms are so large in comparison.
Ok I know what Im about to say is dumb but here it goes. Can a roller coaster G forces destroy a cameras lens? I mean my leans has optical stabilizations, so that might get ruined. Any body know what
If so, how?-Its one the equivalence principles of Relativity. No physical experiment can be done by someone on one of the two situations that permits to find in which situation he really is.-If gravit
a train starts from rest and travels for 1km with uniform acceleration. It travels a further 2km at uniform speed, and is then uniformly retarded to rest in the next kilometre. If the total time taken
