Saturday
May 25, 2013

# Posts by Janice

Total # Posts: 223

Physics
So I did in an experiment and the results I got were the potential energy when the spring compresses is 0 and when it stretches is 1.42. This spring is vertical and has a 250 gram spring attached to it. I was very confused when i got these results because I thought the potenti...

Physics
okay thanks

Physics
okay so the mechanical energy is AlWAYS constant?

Physics
How will mechanical energy affect different points of oscillation on a vertical spring? Well i know that mechanical energy is PE and KE...So when the spring is compressed the mechanical energy will equal the PE and when extended or stretched it will equal KE. Does that answer ...

Physics
A CAR HAS A MASS OF 1200KG TRAVELLING ON A LEVEL ROAD. THE CAR DECELERATED AT A RATE OF 10M/S^2 TILL THE CAR STOPPED. iT HAS TO OVERCOME A TOTAL RESISTANCE OF 400N WHILE BRAKING. (I) CALCULATE THE BRAKING FORCE OF THE CAR (II) WHAT WAS THE DRIVING OF CAR OF THE CAR?

math
What is the interest owed if the principle is 56,950. at 11 4/5 % interest for 155 days, using the 365 day calendar?

Physics
Hot air rises and cold air sinks. So in which condition will a switch of a fan heater be open or close ? Thanks (:

PhysicS
Physics, sorry and thanks !

Physic
Fan -- 15W Heating elements -- 1.2kW Mains -- 240 A) calculate the weekly cost of having the fan heater with the warm air setting on for 3hours each day. Assume that the cost of electricity is 0.25 cents per kWh.

Physic
These three are connected to 240V main supply : Grill = 6A Desk lamp = 0.6A Convector heater = 4.5 a(ii) which of these has the greatest resistance ? Explain how you can tell. (ii) calculate the resistance of the grill (iii) calculate the power rating of the convector heater (...

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