Mechanics | Relativity Answers

a synchronous satellite circles the earth eastward above equator once every 24h and stays over the same spot on the earth because the earth is rotating at the same rate. what is the orbital radius of the synchronous satellite?

4.2×107m

6.4×107m

3.6×107m

Which of the following experimental techniques reduces the systematic error of the quantity being investigated?

A. timing a large number of oscillations to find a period
B. measuring the diameter of a wire repeatedly and calculating the average
C. adjusting an ammeter to remove zero error before measuring current
D. counting down to start the stop-watch at zero in timing oscillations

In an experiment to determine the surface tension of water by the capillary rise method, the surface tension depends on all of the following
EXCEPT------------

A. internal radius of the capillary tube
B. the height of the water column
C. density of water
D. compressibilty of water

particle 1 of mass 3 m initially moving with a speed vo in the positive x direction collides with particle 2 of mass m moving in opposite xirection with unknown speed v. Determine v and v'.

5 in the wave equation

y=asin(ωt+kx)

, the quantity

(ωt+kx)

represents.the symbols have the usual meaning.

phase

amplitude

frquency

period

The P.E of a system in one dimension is given by U= 5-x+3x^2-2x^3. What is the work done in moving a particle in this potential from x=1 m to x=2m ? What is the force on the particle in this potential at x=1andx=2 m? Locate the points of stable and unstable equilibrium for this system.

Which of the following is a set of vector quantities?
velocity and volume
weight and displacement
density and distance
mass and force

In an experiment to determine the surface tension of water, the travelling microscope is used to determine -------------

A. external diameter of the capillary tube
B. height of the capillary rise of water in the tube
C. surface tension of water
D. density of water

In recording measured values, a digit is significant if and only if it affects the -------------- of the measurement

A. absolute error
B. relative error
C. inherent error
D. truncation error

The resulting temperature when 1kg of ice at 0 degrees Celcius is mixed with 9kg of water at 50 degress Celcius is ----------------------- to the nearest whole number.The specific capacity of water is 4200J/kg/K,the specific latent heat of fusion of ice is 330 000J/kg

A. 24 degreees celcius
B. 37 degreees celcius
C. 46 degreees celcius
D. 56 degreees celcius