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Phy
Questions and answers by
Phy
Questions (25)
A point charge Q1=-2 microcoulomb is located at x=0, and a point charge Q2=+8 microcoulomb, is placed at x=-0.5 on the x axis of
1 answer
859 views
An electron is projected, with an initial speed of v= 2.18e+05 m/sec, directly towards a proton that is essentially at rest. If
3 answers
583 views
Two conducting thin hollow cylinders are co-aligned. The inner cylinder has a radius R1 , the outer has a radius R2 . Calculate
4 answers
937 views
Prove that the triangle formed by the points of contact of the sides of a given triangle with the excircles corresponding to
4 answers
798 views
Consider a capacitor made of two square plates of side 'l' . The distance between the two plates is 'd'.
a) We insert a
1 answer
393 views
A charge of q1=1×10−6 C is located at corner A of an equilateral triangle. A charge q2=4×10−6 C is located at corner B and
4 answers
1,645 views
A current I travels counterclockwise through a closed copper wire loop which has the shape of a rectangle with sides 'a' and
1 answer
353 views
A long coaxial cable consists of two concentric conductors. The inner conductor is a cylinder with radius R_1, and it carries a
4 answers
696 views
(a) In the diagram above the small semi-circle in the wire above R_1 indicates that it is not in contact with the horizontal
36 answers
572 views
The equation describing the (r, \theta ) coordinates of points along a single field line of a magnetic dipole is r=R_0 \sin
1 answer
435 views
A simple motor has N=250 turns of wire on a coil measuring 12 cm \times \, 4 cm. It's resistance is R=10 ohms. The magnetic
3 answers
469 views
Consider the following circuit. We have R_1=7 Ohms, R_2=17 Ohms, R_3=11 Ohms, V=9 Volts, L=0.09 H.
At t=0 the switch is closed.
4 answers
517 views
A coil consists of N=10^5 turns of wire wrapped uniformly around a plastic torus. The inside radius of the torus is r0=0.15 m
1 answer
432 views
A spherical shell of radius R carries a uniform surface charge density (charge per unit area) \sigma. The center of the sphere
10 answers
787 views
In the following circuit R_1=3 Ohm, R_2=10 Ohm, C=0.003 Farad, V=5 Volts.
At time t =0 we connect the power supply to the
2 answers
555 views
If f(2)=1 and f(2+h)=(h+1)3, compute f′(2).
If f(−1)=5 and f(−0.9)=5.2, estimate f′(−1). If the line y=−3x+2 is
3 answers
458 views
A body of mass m= 1 kg is moving along the x-axis. Its potential energy is given by the function
U(x)=2*(x^2−1)^2 Suppose the
1 answer
390 views
A woman weighs Fg= 600 N when standing on a stationary scale. Now, the woman is riding an elevator from the 1st floor to the
4 answers
963 views
An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position.
2 answers
511 views
A block of mass m=2 kg on a horizontal surface is connected to a spring connected to a wall (see figure). The spring has a
1 answer
478 views
An object of mass m=80 kg moves in one dimension subject to the potential energy
U(x)=λ/4*(x2−a2)2+(b/2*x2) a) How many
80 answers
1,222 views
Consider 2 kg of an ideal gas (R=300 J/(kg.K) and Cp=1000 J/(kgK)) contained in a piston cylinder arrangement. The cylinder has
1 answer
812 views
Steam in a cylinder-piston arrangement expands from an initial condition of 5 bar, 80% dry to a final state of 2 bar, dry
3 answers
701 views
An insulated rigid tank contains 1.5 kg of helium at 30∘C and 500 kPa. A paddle wheel with a power rating of 0.1 kW is
5 answers
1,698 views
A car of mass 1200kg is moving on a road at the speed of 60km/hr.if coefficient of friction is 38, and Normal force is 50N. The
2 answers
590 views
Answers (77)
The pressure is 0.2526 atm
The pressure is 0.2526 atm
Didn't get the solution for b) and c) of 1st problem, please help me
BW please tell me solution for the 1st problem, my beta is 0.8 and mass is 3kg
bw did u find f_y?
Can someone please tell me the solution for b) part?
I got c) part, the angle is 48.18 for all values
Please help me, my beta is 0.8 and mass is 3 kg, I got only the a) part correct, b) and c) are wrong :(
How to calculate M initial and M final?
Yes, try it yourself, I got a green tick!
Yes yes, even I got the same result, but solved it a little differently
I think i have got how to work for t12, let me try first.
@ mouse, in the airliner's problem, what units do we have to keep? I converted kN to kg and tonnes to kg as well.
@ mouse, I read the airliner prob properly, I solved it but got it wrong. I am confused in the equations. Their equation is F(t)=-F0+Bt , whereas ours is F(t)=-F0+(t/ts-1)*F1. What is B? I have only 1 try left now :(
Thanks a lot mouse, I could solve the pendulum problem. But, in the mass spring problem, I got x1=0.5714 , so mod(x2-x1) should also be equal to x1, correct? But when i typed in the value, it showed that x1 was correct but mod(x2-x1) was wrong :( Also, I
ss01, can you please tell me the solution for the airliner problem?
Thanks a lot mouse and KS, Did anyone get the airliner and the pendulum problem?
@ KS, can you please tell me how you got the solution for Double Well potential? I am not getting the value for k.
Please help me mouse
Thats what I am not getting! My x0 is 2, so F(x)= !@#$%^&(x-2), when i type this in taylor series calculator of wolframalpha, i get a huge equation!
Yes i got x0, but i didn;t get k, can you please tell me how to calculate k for those values?
@ mouse, my x_0 is 2, lambda is 5, a=4, b=60 and mass is 80kgs. Please tell me the value of K, i tried to solve it by your method, but i got it wrong.
ss01, can you please tell me a,b,c parts?
I didn't get the 2nd part, If I plug in 50*10*cos(30) , i get the answer wrong.
And also for sliding down the dome's 2nd part
I need help for airliner and double well potential ( K=? T=? )
I couldn't understand part c. In wolframalpha, what do we have to enter as the order of the taylor series and the point?
What about the remaining parts??
Yes, this method is not working
What is the distance here?
Thanks. Did you get Stone On Roof Find Distance problem?
Can you tell me how to calculate distance of the particle to the origin at time, speed of the particle and the smaller angle? I got the acceleration. Thanks
Well, I don't know how to differentiate, can you explain it to me.
I didn't get you, can you explain it properly how to do the 1st problem
kyle and ss01 can you please tell me how to solve the 1st problem?
Even I wanted to know how to solve this problem. Can any one tell me how to solve the first problem of the exam? I got the answers of all problems except these 2.
Thanks, can you tell me the rest?
Q3, 3rd and 4th I=V/R
Thanks, can u tell me the solutions of 1,4,6,9,10,11,12?
P, these are the answers- 1.2133e-8 1.21845e-7
No i didn't get them yet, I'll tell you when i get those, can u tell me the solutions of 1,4,6,9,10,11,12?
What is di/dt ??
B=n*E_0/c wavelength= 2*pi*c/(n*omega) Direction -z and -y
I got 4th problem
No, do you have any idea for others problems?
b) 0
6_2A= -t_0*x 6_2B= -t_0*(x^2-L^2)/(8*pi*G_0*R^4) 6_2C= -L^2*t_0/(8*pi*G_0*R^4) 6_2D= 5*t_0*L/(4*pi*R^3) 6_3= 8*psi*G*I_o/(L^2) i need 6_1B
anyone got the 2nd answer???
Period (P) = 1/F
Do you know 1st c) and d) ?? And 3rd problem??
