Recent content by ColdRifle

you want have any wave where the two waves which are coherent meet out of phase and cancel each other out... so from the given data we can see that lambda=2.5cm, D=200cm, x=5cm So you can find the separation the first "dark" fringe has with the central one. 2.5=5y/200 So y=100cm Although I...

Thats because no force acts on the ball but on the cloth. So th ball is moved only by the act of friction by the movement of the cloth.Since it tell you to calculate the speed of the ball when it reaches a state of rolling without slipping(act of frictions) the answer is that it doesn't have any...

Answer explanation thats because the ball when dropped will have the same velocity as the elevator & you who dropped it and its 20m/s. In relation to you the ball is moving downwards but in relation to the stationary washer its moving upwards. Thats because as the car moves it moves you AND...

First of all efficiency=1-T2/T1*100%=1-273/303*100%=9.9% Then efficiency=usefuloutput/Inputbythemachine=(3*338700)/input So work needed as I calculated is 102.64KJ AND you are both wrong (if I am not wrong...) Thats because what you have to calculate is the input the machine needs since it...

can you give us a little more details about the exercise?? .Does it have a initial velocity or its velocity its due to gravity only??what its mass does the exercise gives any other data??

1st 2 in taxi1 4 in Taxi2 and 4 in taxi3 2nd 2 in Taxi1 5 in taxi3 and 3 in Taxi2 3rd 1 in taxi1 5in taxi3 and 4 in taxi2 so there are 3 possible ways...thats because you have only one spare seat in all three taxis so the spare seat can be in all three taxis

i got it right then...:)

m1V1=m2V2 where m1=2.5Kg V1=0.8m/s m2=1.5+2.5=4Kg V2=? i suppose this is the answer because there is no vertical component of the bricks force acting on the truck...

I have no idea...maybe they made a mistake or I did one...lol

Tis is true only if at BD no current passes. moreover Vad=vdc and Vab=Vbc. the special about that is that Iab=Ibc+Ibd and Iad=Idc+Idb. The one red is positive and the other negative...Since you find the total current that passes through bd you can measure the voltage across it :approve:

m1u1=m2u2 Since we want the ratio of m1 and m2 we make m2=m1*k(a constant) m1(9m/s)=m1*k*5m/s k=9/5 So the ratio of the two masses is that the 1st has the 5/9 of the seconds mass

I cannot download the attachment.Fix it pls

Accelerations will be the same only if both have the same mass and whether the force applied is the same to both...

Use g as 9.81m/s^2 and not 9.8m/s^2 and you might get the right answer