1. Scientists usually use the astronomical unit “au” to measure the distance inside our solar system. 1 au equals to 0.15 billion kilometers, which is the distance between the sun and the earth. In the movie “the Wandering Earth”, if our sun explodes, what would happen if we did not escape?

2. According to Einstein's special theory of relativity, the higher velocity of an object in space, the slower its time passes. Based on this information, how could you slow down your time the most?

3. A hydrogen bomb can release up to 240,000 TJ of energy (1 TJ = 1000,000,000,000 J). According to Einstein's Equation: E=mc², how many hydrogen bombs must explode to produce the same amount of energy as that is released by a person with mass of 60 kg annihilating with antimatter (annihilation happens when matter and antimatter collides and converts to 100% energy)?

4. The LHC is the world's largest and highest-energy particle accelerator. It contains a circular tunnel with a circumference of 26.7 kilometres. It uses electromagnetic field to accelerate the protons up to 99.999999% of the speed of light before collision. Which of the following statement is false about the LHC?

5. Wireless charging provides more convenience than traditional wired charging. However, there are also limitations. Which of the following statement is true about wireless charging?

6. A cylinder, a circular hoop, and a sphere, all of mass M and radius R, are placed at height h on a slope of angle θ. All three are released from rest simultaneously and roll down the ramp without slipping. Which one will win the race to the bottom of the hill?

7. Which type of heat transfer is via molecular collision?

8. If a gas is heated against a pressure in a container with constant volume, then the work done will be

9. Which of the following processes are thermodynamically reversible?

10. Center of buoyancy always