The kinetic energy of the car will be dissipated as heat due to the frictional forces. KE=(1/2)mV^2=1500*36/2=27000 J The work done by frictional forces=F*d Now, F*d=KE F=KE/d=27000/5=5400 N
Use PV=nRT to find the pressure of the gas in the container at 20 deg.C. All the variables except for P are given to you in the problem. The heating process is isobaric -so, the pressure would not change. But its volume would increase which you can find by using the equation: ...
(a) is correct. Force, momentum and velocity are vectors. Energy and work are scalar quantities.
i=q/t => q=i*t=5.5*120(sec) =660 Coul.
You have not mentioned the units in the problem - I trust the mass is 15.5 Kg and Force =38.0 N. Fx= 38*Cos42 .....in hor. direction Fy= 38*Sin42 .....in vertical downward direction For equilibrium in vertical dir.- Normal force N = mg+Fy N=15.5*9.8 + 38*Sin42 =151.9 + 25.4 =1...
Pressure at the bottom of a water column of height h = d*g*h where, d=density of water(1000Kg/m^3) g=9.8 m/s^2 & h=30 m Calculate P yourself.
Wi= 1200 rev/min = 20 rev/sec = 20*2*pi rad/sec Wf = 0; alpha= -1.5 rad/s^2 Wf = Wi + alpha*t 0 = 40*pi - 1.5*t t = 40*pi/1.5 = 84 sec Now, theta = Wi*t + (1/2)*alpha*t^2 Plug in the values in this eqn. to get theta - the rotation of the wheel (in radians)before it comes to ha...
physics constant angular acceleration
4 rev.= 4*2*pi radians use the formula for angular motion: theta = W0*t + (1/2)*alpha*t^2 .....(1) here theta = 4*2*pi W0 = 4.3 alpha = 3.75 Solve the quadratic eqn.(1)to get the value of t (time) The data on radius of the wheel has no use in solving this problem.
Assume a thermal equilibrium temp. T and find the heat absorbed by ice (say Q1)to raise its temp.from -35 deg. to T deg. Similarly, find heat released by water (say Q2) when its temp. lowers from 45 deg. to T deg. Putting Q1 = Q2 will give you T in deg. C. Note: Do not forget ...
Follow the following steps: 1. Calculate the ice block's mass from its volume and density. 2. Compute heat required to raise its temp. from -19.3 degC to 0 deg - Q1 3. Consider latent heat required to change the state from ice at 0 deg. to water at 0 deg. - Q2 3. Compute h...