Answers created by Dr.Z

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• Question #4802e
  
• If mass and distance from earth to r is half then what will happen to Gravitational potential energy?
  
• What does the slope of velocity-time graph represent?
  
• Why some impurities are used with semi conductors in the solar panel?
  
• A wrench with a length of `10 cm` is used to unscrew a `5/2 cm` bolt. If a torque of `18 Nm` is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?
  
• How does looking at a spectrum tell us what a star is made of?
  
• How do you calculate the resultant of the following vectors 4.0N and 10.0N with an angle of 90 degrees between them?
  
• How does static electricity related to the net charge of an object?
  
• What is the function of the split ring commutator and carbon brushes in an electric motor?
  
• Question #a6948
  
• How do you write and graph a function that translates `y=sqrtx` by shifting 7 units up?
  
• An object with a mass of `9 kg` is on a plane with an incline of `- pi/4`. If it takes `24 N` to start pushing the object down the plane and `5 N` to keep pushing it, what are the coefficients of static and kinetic friction?
  
• A truck pulls boxes up an incline plane. The truck can exert a maximum force of `5,700 N`. If the plane's incline is `(2 pi )/3` and the coefficient of friction is `8/5`, what is the maximum mass that can be pulled up at one time?
  
• Question #3b038
  
• Question #feb3b