PHYSICS
During a vertical throw, a ball slows down as it rises and speeds up as it falls. Explain how acceleration behaves throughout the motion and why this happens. (30 seconds)
Acceleration is constant downward (gravity) the entire time.
What is the name of the type of bond formed when electrons are shared between atoms? (30 seconds)
Covalent bond
What is the force per unit area called that stretches or compresses a material? (30 seconds)
Stress
Which country hosted the FIFA World Cup in 2022? (30 seconds)
Qatar
Which animal can be seen on the Ferrari logo? (30 seconds)
A Horse
A metal rod is heated at one end, and after a while, the other end gets warm. Explain why. (30 seconds)
Conduction transfers heat through collisions of particles within the solid, moving thermal energy from the hot end to the cold end.
What are the two main factors that affect the rate of a chemical reaction? (30 seconds)
Temperature and concentration
What is the process of heat transfer by the movement of fluid called? (30 seconds)
Convection
Which club did Cristiano Ronaldo win his first UEFA Champions League title with? (30 seconds)
Manchester United FC
What is the capital city of Canada? (30 seconds)
Ottawa
A wave on a string has a mass of 0.5 kg stretched over 2 m and a tension of 100 N. What is the wave speed along the string? (1 minute)
20 m/s
Why does decreasing pressure favor the side of a reaction with more gas molecules? (1 minute)
According to Le Chatelier’s principle, the system shifts to increase pressure by producing more gas particles.
A municipal water supply uses a 0.3 m diameter pipe carrying water at 2 m/s. To prevent sediment buildup in homes, a sediment trap removes 5% of the water flow. What is the volumetric flow rate of water after the trap? (1 minute)
≈ 0.134 m³/s
Name all the clubs that Pep Guardiola has managed in his career. (1 minute)
FC Barcelona, Bayern Munich, Manchester City FC
In the 19th century, a scientist conducted experiments with electricity and magnetism, rotating a conductor in a magnetic field. His discovery laid the foundation for all modern electric generators. Who was this scientist? (1 minute)
Michael Faraday
During a safety test, a 3 kg object is released from rest at a height of 25 m above the ground. Air resistance is negligible. Determine the velocity of the object just before impact. (1.5 minutes)
≈ 22.1 m/s
Hydrochloric acid is added to solid sodium carbonate in a beaker, and bubbles form. Write the balanced equation and identify the gas: Na₂CO₃ + 2 HCl → (1.5 minute)
Na₂CO₃ + 2 HCl → 2 NaCl + H₂O + CO₂; gas is carbon dioxide
A ceiling fan is designed with blades that are curved rather than flat. Engineers claim this shape improves efficiency. Why is a curved blade preferred? (1 minute)
To move air more effectively by generating lift
In what year did Chelsea FC last win the English Premier League (EPL)? (1 minute)
2017
This "thing", originally used by Native Americans as a natural resin from spruce trees, was later commercialized in 1848 by John B. Curtis, who created the first marketed version known as The State of Maine Pure Spruce. Chemically, it evolved from natural polymers to synthetic elastomers for improved texture and longevity. What is it? (1.5 minute)
Chewing gum
An engineering team tests a projectile launcher that fires at an angle of 45° with an initial speed of 60 m/s. Neglecting air resistance, determine the horizontal range achieved. (2 minute)
≈ 367 m
A solution is prepared by dissolving 0.547 of HCl in 4.6 kg of water. Calculate the pH of the solution. (density of water is 1.00g/mL) (2 minute)
2.49
A farming cooperative installs a pump to lift water from a river to an irrigation tank located 15 m above. The system must deliver 0.06 m³/s of water continuously. Due to pipe friction and minor losses, an additional 20% energy is required beyond the ideal lifting energy. The pump operates at 70% efficiency. What power (in kW) must the pump motor supply? (2 minute)
≈ 15.1 kW
In the 2006 FIFA World Cup, this Italian defender was captain of his national team, known for his leadership and tactical intelligence. Also he is known as one of the few defenders who won the Ballon D'or. He lifted the World Cup trophy and later won league titles in Italy and England. Who is he? (2 minute)
Fabio Cannavaro
Why does a wet road appear darker than a dry one, even though water itself is transparent? (1.5 minute)
Water reduces diffuse reflection by filling in tiny surface gaps, creating a smoother surface that allows more light to be refracted away instead of scattering toward your eyes. This makes the road appear darker.