Questions asked by Sundream

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• A body of 1 kg moves in a circle. At time=0 it moves with the velocity of 4 m/s and a force of 16 N is exerted on it. The force and the velocity share an angle of 60°. What is the velocity at t=1s and what is the radius of the circle?
  
• Two smaller spherical raindrops collide and merge into one larger spherical raindrop. What is the radius and surface energy of this larger drop, compared to the two smaller ones?
  
• How can you calculate solar luminosity of the Sun using Earth's solar constant?
  
• 2 litres of water have have reached the temperature of 103°C, without beginning to boil. However after throwing in a small piece of ice (with insignificant mass), the water began to boil. What is the mass of water that transformed into water vapor?
  
• Can you calculate the first and second derivative of #(x^3+1)/x^2# ?