Questions asked by hanen

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• Whats a vapor pressure?
  
• Find the value of k if the discriminant = 0?
  
• He won a nobel prize for chemistry or he won a nobel prize in chemistry ?
  
• How many moles of water are there in hydrated copper sulfate?
  
• How can i calculate distance and displacement here?
  
• Prove that ?
  
• Why do projectiles with angle 45 make the biggest range?
  
• We all expected that he would win the match or he will win the match?
  
• Car accelerates uniformly from rest to reach velocity (v) and covers distance (d) then the velocity of the car when it covers distance equal 2d ?
  
• Why does the momentum of the object increase when it falls freely ?
  
• If a body moves from rest in a straight line with nan acceleration (a) and another one with an acceleration (2a) covering the same distance ,the ratio between time of motion of the first body yo the second one is.....?
  
• The ratio between the centripetal force of body in (A) to that in (B) is.?
  
• What is sustainable development?
  
• If the ratio between the weight of an object on a planet to that on earth is 1:2 ,find the ratio between the mass of the planet to the mass of the earth knowing that the diameter of the planet is half that of the earth?
  
• Which is right have or had?
  
• Is or was?
  
• A car of mass 1130 kg moves with velocity 17.6 m\s then it collided with a tree and moved with uniform acceleration until it stopped through a distance of 0.77 m ,calculate the force affecting the car?
  
• What is the passive form of ?
  
• A worker does work of 360 J against a friction force of 20 N in pushing a body with a uniform velocity for 4.5 s find the value of velocity?
  
• A ball of mass 0.5 kg is projected vertically upwards if its velocity at 4m high is 3 m\s find the potential energy and kinetic energy given that the acceleration due to gravity =10 m\s^2?
  
• A plane of mass 50000 kg requires a path of 1500 m to reach 180 km\hr find: the acceleration the engine force?
  
• Is the word noise countable?
  
• He's giving a birthday party next week,he's; 1.having a lot of presents 2.will have a lot of presents 3.going to have a lot of presents??
  
• The bus (broke-was broken) down?
  
• The man asked if he (could-would ) help me? choose the right answer