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Physical Science - Difficult Round

Quiz by Mark Gerald B. Doblon

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10 questions
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  • Q1
    One mole of element A and two moles of element B are used to form product $AB_2$. How many moles of product $AB_2$ is formed in the reaction?
    three moles
    one mole
    four moles
    two moles
    120s
  • Q2
    Study this equation, $C_2H_2+O_2 \rightarrow CO_2+H_2O$. If there are 5 moles of oxygen, how many moles of carbon dioxide is released?
    3 moles $CO_2$
    1 mole $CO_2$
    2 moles $CO_2$
    4 moles $CO_2$
    120s
  • Q3
    A roller coaster was released from the top of an inclined plane. What happens to the speed of the coaster as it approaches the bottom?
    increases
    comes to a full stop
    stays the same
    decreases
    120s
  • Q4
    Which of the following statements best explains why you tend to move backward inside a car, which is initially at rest and then suddenly moves forward?
    You want to move in the same direction as the car due to your inertia.
    You want to move opposite the motion of the car due to your inertia.
    You want to remain in motion due to your inertia.
    You want to remain stationary due to your inertia.
    120s
  • Q5
    Which statement best describes the law of acceleration?
    The law of acceleration states that the acceleration of an object is proportional to the force acting on it.
    The law of acceleration states that the acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass.
    The law of acceleration states that the acceleration of an object is inversely proportional to its mass.
    The law of acceleration states that the acceleration of an object is proportional to and in the same direction as the net force acting on it.
    120s
  • Q6
    What is the net force acting on a 60.0 $kg$ object with an acceleration of 3.00 $m/s^2$?
    0.0500 N
    20.0 N
    180 N
    540 N
    120s
  • Q7
    A motorist with a mass of 70.0 kg rides a motorcycle with a mass of 50.0 kg. If the forward force on the bike is 200 N, calculate the bike’s velocity after 5.00 s if it started from rest.
    14.3 m/s
    8.30 m/s
    20.0 m/s
    3.00 m/s
    120s
  • Q8
    A bowling ball pushes the pins towards the left. What is the reaction force?
    The ball pushes the pins to the left.
    The pins pushes the ball to the left.
    The ball pushes the pins to the right.
    The pins pushes the ball to the right.
    120s
  • Q9
    According to Galileo’s experiment in motion, in the absence of friction, what happens to the ball rolling from an inclined plane going to a horizontal plane as shown in the figure?
    Question Image
    The ball will continue moving, but will curve as it reach the bottom of the inclined plane with constant speed.
    The ball will speed up while rolling before coming to a sudden stop.
    The ball will continue to move in a straight line with increasing acceleration.
    The ball will continue to move in a straight line with constant speed.
    120s
  • Q10
    What is the difference between Galileo’s and Newton’s findings regarding vertical and horizontal motions?
    Galileo stated that only objects moving horizontally have constant velocity while Newton believed that objects moving horizontally and vertically are moving with constant velocity.
    Galileo stated that objects moving horizontally and vertically are moving with constant velocity, while Newton believed that only objects moving vertically are moving with constant velocity.
    Galileo stated that only objects moving vertically have constant velocity while Newton believed that objects moving horizontally and vertically are moving with constant velocity.
    Galileo stated that objects moving horizontally and vertically are moving with constant velocity, while Newton believed that only objects moving horizontally are moving with constant velocity.
    120s

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