Answers edited by Aritra G.

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• The position of an object moving along a line is given by #p(t) = sin(3t- pi /4) +2 #. What is the speed of the object at #t = (3pi) /4 #?
  
• Question #04863
  
• Question #d88fe
  
• Does the conservation of momentum really imply Newton's third law?
  
• What is integration by Parts?
  
• Question #e9899
  
• How do you solve the system of equations #x + y = - 3# and #x + 2y + 8= 0#?
  
• How do you solve quadratic inequalities #4x^2 - 5x < 6#?
  
• What does the second law of thermodynamics state?
  
• Why doesn't a heavy object accelerate more than a light object when both are freely falling?
  
• What is the angular momentum of an object with a mass of #5 kg# that moves along a circular path of radius #4 m# at a frequency of # 4 Hz #?
  
• What is the Dalton atomic model?
  
• What force is the weakest force in the atom?
  
• What is shielding effect of inner electrons?
  
• The velocity of an object with a mass of #3 kg# is given by #v(t)= sin 4 t + cos 4 t #. What is the impulse applied to the object at #t= pi /4 #?
  
• How are frequency and energy in electromagnetic waves related?
  
• What is the relationship between Charles law and the kinetic theory of gases?
  
• Question #05008
  
• Why is Gibbs free energy 0 at phase change?
  
• How was the second law of thermodynamics created?
  
• Question #553e0
  
• The average kinetic energy of the molecules of an ideal gas is directly proportional to what?
  
• What is vector projection?
  
• Question #a8471
  
• Question #a65c6
  
• Why is electric potential a more useful quantity for most calculations than electrical potential energy?
  
• Question #ec1b2
  
• Question #72ca9
  
• Do all stars radiate heat energy, light energy, and electromagnetic waves?
  
• The velocity function is #v(t)=-t^2+4t-3# for a particle moving along a line. Find the displacement of the particle during the time interval [0,5]?
  
• Question #0ad8d
  
• How do you simplify #sqrt(-52) #?
  
• How does force change the shape of an object?
  
• Question #015d1
  
• Red light has a wavelength of #7.0 times 10^-7# #m#, what is its frequency?
  
• Why is alternating current used to distribute electricity?
  
• Question #13005
  
• Are there limitations to Newton's third law? Why?
  
• Question #53f84
  
• How does a resistor affect an AC circuit?
  
• Question #7bdc8
  
• How can an electric field be produced in a metal?
  
• How do single double and triple bonds compare?
  
• Question #a90b7
  
• How does a vector differ from its projection?
  
• How is heat energy transferred?
  
• Question #6b809
  
• Question #87082
  
• Why is cyclohexanol a secondary alcohol?
  
• What is an electric current that reverses its direction in a regular pattern?
  
• Why do sound waves travel fastest in solids rather than in liquids or gases?
  
• How does the kinetic-molecular theory explain the pressure exerted by gases?
  
• What is an example of how a magnetic force can make an object move?
  
• How would you explain the photoelectric effect using quantum theory?
  
• What are electromagnetic waves?
  
• What are Helmholtz free energy and Gibbs free energy?
  
• What is the relative velocity equation?
  
• How do I use Frobenious' power series method to solve a Cauchy-Euler's equation ?
  
• Question #ca849
  
• How does particle physics explain fundamental forces?
  
• What are the similarities and differences between temperature and thermal energy?
  
• How are displacement, velocity and acceleration related?
  
• Is #x+sqrty=4# a linear function and explain your reasoning?
  
• Question #4730f
  
• What is the difference between physical optics and geometric optics?
  
• Did Ernest Rutherford's experiment establish the plum budding model of the atom?
  
• What does electromagnetic induction depend on?
  
• How did Coulomb study the repulsion and attraction forces of charged particles?
  
• What was Heisenberg's contribution to the atomic model?
  
• Is a metal's work function, #Phi# and first ionisation energy the same?
  
• How do you solve #-9x ^ { 2} - 5= - 77#?
  
• How are electric charges produced?
  
• What is the probability function for the Hydrogen atom?
  
• What is electric generators?
  
• Can absolute zero temperature be reached?
  
• How is the scalar product of vectors related to work?
  
• How do single, double, and triple bonds affect bond length?
  
• Question #23b7a
  
• What is meant by thermionic emission?
  
• What is the force, in terms of Coulomb's constant, between two electrical charges of #14 C# and #9 C# that are #4 m # apart?
  
• How are Stefan's law and Newton's law of cooling related?
  
• What is the String Theory?
  
• How are particle accelerators helping study and control particles?
  
• Question regarding light refraction?
  
• What are common mistakes students make with Cramer's rule?
  
• Why do batteries run down?
  
• Question #891a7
  
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