CIE Mock Exam: Subatomic Particles and Physics
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Questions and Answers

Which of the following statements is NOT true about subatomic particles?

  • Protons and neutrons are found in the nucleus
  • Protons and electrons attract each other
  • The mass of an electron is equal to the mass of a proton
  • Electrons have a positive charge (correct)

    • What is the significance of the number of significant figures in a measurement?

  • It indicates the type of measurement
  • It indicates the precision of the measurement (correct)
  • It indicates the unit of the measurement
  • It indicates the accuracy of the measurement

    • What is the weight of 100 million atoms of gold, given its molar mass is 196.97 g/mol?

  • 4 x 10^(-14) g (correct)
  • 3 x 10^(-14) g
  • 2 x 10^(-13) g
  • 5 x 10^(-14) g

    • What volume is equal to 40 mL?

    <p>40 cm^3</p> Signup and view all the answers

    In a reaction, 35.0 grams of C6H10 and 45.0 grams of O2 are involved. How many grams of the excess reagent will remain after the reaction ceases?

    <p>19.9 g</p> Signup and view all the answers

    Miguel's grandfather will be six times as old as Miguel was last year in three years. If the sum of their present ages is 68, what is Miguel's grandfather's present age?

    <p>Between 58 and 61</p> Signup and view all the answers

    What is the percentage abundance of 35Cl if the atomic mass of chlorine is 35.453?

    <p>74.3 %</p> Signup and view all the answers

    How did Mendeleev arrange the elements?

    <p>atomic weight and chemical reactivity</p> Signup and view all the answers

    What is the magnitude of the force exerted by support B?

    <p>1.5 kN</p> Signup and view all the answers

    What is the force on the member CD?

    <p>318 lb (T)</p> Signup and view all the answers

    What is the acceleration of the train?

    <ul> <li>4 m/s2</li> </ul> Signup and view all the answers

    What is the velocity of the missile when it hits the ground?

    <p>150 m/s</p> Signup and view all the answers

    If Liu completes the task alone in x minutes, how is x related to the time taken by the initial two workers?

    <p>x is three times the time taken by the initial two workers</p> Signup and view all the answers

    What is the constraint for the rancher's rectangular region?

    <p>The perimeter of the region is fixed</p> Signup and view all the answers

    What is the derivative of the function f(x) = 2x + x^2 at x = 3?

    <p>12</p> Signup and view all the answers

    What is the value of a12 in the matrix A?

    <p>-2</p> Signup and view all the answers

    What is the volume of the gas at STP, given that it occupies 2.00 L at 25.0°C and 745.0 mmHg?

    <p>1.9 L</p> Signup and view all the answers

    What is the molality of ethanol in the solution, given that it is made by dissolving 14.6 g of ethanol in 53.6 g of water?

    <p>5.92 m</p> Signup and view all the answers

    What is the direction of the friction force on the table by block A?

    <p>To the left</p> Signup and view all the answers

    What can be said about the horizontal component of velocity of the ball?

    <p>It is constant through time</p> Signup and view all the answers

    What is the maximum value of kinetic energy of the ball?

    <p>Just before it hits the floor</p> Signup and view all the answers

    What is the resultant force acting on the parachute?

    <p>Zero</p> Signup and view all the answers

    What is the time for which the force by the book on the bullet lasts?

    <p>around 0.020 s</p> Signup and view all the answers

    What is the minimum force required to lift the stone door?

    <p>20,000 N</p> Signup and view all the answers

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