Physics Answers

A proton is in moving in a circular orbit radius 14cm I a uniform 0.35T magnetic field perpendicular to the velocity and proton find speed of proton

Suppose you have a bridge rectifier built with Silicone diodes. This bridge is connected to a voltage source of Vin(sec) = (Last 2 digits of your Roll number) Vp Sinewave of frequency 25Hz and has a (your date of birth e.g. 09 of Jul) K ohm load resistor at DC side. 1.Draw the circuit diagram. 2. Draw the Vi on Graph Paper. 3. Draw the Current directions of each cycle on circuit diagram with different colours of pointers. 4. Find the V0ut. 5. Draw the Vout Graph paper. 6. Find the VAve 7. What is the output frequency fout? 8. What is the name of unfiltered DC at out of the rectifier circuit?

A small piston of a hydraulic press has an area of 20.0 cm2. If the applied force to the piston is

75.0 N, what must the area of the connected large piston be to exert a force of 6550 N?

A rocket has an initial mass of 2 x 104 kg, a mass ratio of 3, a burning rate of 100 kg/sec, and an exhaust velocity of 980 m/sec. The rocket is fired vertically from the surface of the earth. How long after ignition of the engines will the rocket leave the ground? (

A particle P moves on the plane. Position vector of P is "\\vec{r}". Angle "\\theta" measured from point O to OP. If "\\ddot{\\vec{r}}=(kr\\dot{\\theta}-\\mu r)\\hat{e}_r+k\\dot{r}\\hat{e}_\\theta" where "k" and "\\mu" are constant and "\\mu >\\frac{3}{4}k^2". Defining initial conditions at the time "t=0" ,"\\vec{r}=a\\hat{e}_r, \\dot{\\vec{r}}=\\frac{1}{2}ka\\hat{e}_\\theta" and "\\theta=0" find equation of motion of P"\\ddot{\\vec{r}}=(kr\\dot{\\theta}-\\mu r)\\hat{e}_r+k\\dot{r}\\hat{e}_\\theta)"

As shown in the figure below, two forces are applied horizontally to two blocks in contact. The horizontal surface on which the blocks slide frictionless. if F = 6.0N and M=1.0kg, what is the magnitude of the force exerted on the large block of mass 3M by the small block of mass 2M.

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1. A man drops a rock into a well. (a) The man hears the sound of the splash 2.40 s after he releases the rock from rest. The speed of sound in air (at the ambient temperature) is 336 m/s. How far below the top of the well is the surface of the water? (b) What If? If the travel time for the sound is ignored, what percentage error is introduced when the depth of the well is calculated?

 A rectangular window that is 1.2 m wide and 1.8 m high has a thickness of 6.2 mm, a thermal conductivity value of 0.27 W/m/°C. The temperature inside the home is 21°C and the temperature outside the home is -4°C. Calculate the rate of heat transfer. 

A particle has a velocity of v=(-2.0i +3.5j)m/s. The particle starts at r= ( 1.5i -3.1j)m at t=0. Give the position and acceleration as a function of time. What is the shape of the resulting path?

A rubber band has a force constant of 45 N/m. When the rubber band is pulled by a force of 9.8 N, how far will it stretch and what is its potential energy?