Recent content by kalupahana

Homework Statement A balloon with a constant volume is in 1000C. The fraction of gas flow out of balloon when temperature increased by 20C is nearly equal to (consider pressure and the gas in balloon is ideal) a. 2/373 b. 2/375 c. 2/100 d. 373/375 e. 100/102 Homework Equations...

Homework Statement [FONT="Courier New"]A battery if emf E0=12v connected across a 4m long uniform wire having resistance 4Ω. The cells of small emf E1=2v and E2=4v having internal resistance 2Ω and 6Ω respectively, are connected as shown in figure below. If galvanometer shows no deflection at...

Ok thanks for help, i got it

Homework Statement The Cells in a circuit has 2V and 4V emfs and 2Ω and 6Ω internal resistance respectively. Find the potential difference between AB Homework Equations V=IR Kirchoff's Laws The Attempt at a Solution The attempts are in image

I got triangle like this then tan60 = VRG /4 4√3 = VRG

:eek: oh, sorry tiny tim, i posted two posts at one time. When I check them, I reply a 2nd questions tags in here. okk, i can understand it thnx a lot

To horizontal 4km/h. VRG is constant. Therefore The VRG of both triangles are equal. VRM is 60o inclined downwards from VMG to opposite direction. tan60o = x/4 4√3 = VRG cos60 = 4/y 1/2 = VRM Now its okay?

Homework Statement A meri go round is rotating it vertical axis through center with a diameter 4.5m. It's moment of inertia is 1750 kg m2 and angular velocity is 0.70 rad/s. 4 men with mass 65 kg instantly enter the the edge of the meri go round. Calculate the angular velocity of meri go round...

In both instance VRM is constant. then sin60 = 2/x x = 4/√3 = 2.3 km/h is this right

Then it come as 1/2 = u/v v/2u = tanα α = tan-1(v/2u) is it come like this

Relative motion prob, please help Homework Statement A man walk at a rate of 2 km/h; A rain appears to fall vertically. when he doubled his speed it appears to fall at 30o vertical. Find the real speed of the rain. Homework Equations The Attempt at a Solution Help me to do this...

Homework Statement A girl swim one bank of a river with 100m when she swims perpendicular to the water current. She reaches the other bank 50m down the stream. The angle at which she should swim ti reach a point directly opposite on the other bank of the river is? (Velocity of girl=u...

thnx, i got it, the answer come

Homework Statement The sum of two forces is 24N. There resultant is act right angle to the smaller of the two forces which is 12N. Find the magnitudes of the two forces & the angle between them. Homework Equations R2 = P2 + Q2 + 2PQcosΘ tan α = QsinΘ/ (P+QcosΘ) The Attempt at a...

that means the radius is 1/2m. Then velocities are come like 15.2 x 2 & 22.2 x 2. Ok I understand. I'll try from it