OLYMPHYSICS (SIMULATION 1)

If the mass of one object doubles, the mass of the other object is quadrupled and the distance between the two object is halved, how does the gravitational force change?

• Increases 16 times

• Increases 32 times

• Increases 2 times

• Increases 4 times

Two objects, A and B, have masses of 1500 g and 8750 g, respectively. The gravitational force between these two objects is 0.2189 nanoNewtons. Calculate the distance between these two objects.

• 1 m

• 2 m

• 1000 m

• 2000 m

A hydraulic lift is used to raise a heavy object weighing 2000 Newtons. The input piston has a diameter of 0.02 meters, while the output piston has a diameter of 0.2 meters. Calculate the force required to exert on the smaller piston to lift the object using Pascal's principle.

• 400,000 N

• 300,000 N

• 100,000 N

• 200,000 N

A cube has a density of 650 kg/m³ and a buoyant force of 15 N is fully submerged in water. Find the dimension of the cube.

• 0.0024 m

• 0.0015 m

• 0.12 m

• 0.11 m

Two balloons attract each other with a force of 4.05 µN at a separation distance of 5 meters. If one balloon has a charge of +2.5 nC, then find the charge of the second balloon.

• • - 4.5 nC

• 4.5 nC

• 4.5 µC

• -4.5 µC

An object has a resistance of 25 kOhms at 25 degrees Celsius. What is the final temperature if the resistance of an object increased to 25.105 kohms. (use: resistivity = 5.6x10^-5 ohm-meter)

• 125 degrees C

• 0 degrees C

• 75 degrees C

• 100 degrees C

Find the total current of the circuit.

(Clue: 10 ohms and 20 ohms are in series)

• 0.6 A

• 0.29 A

• 0.33 A

• 0.21 A

 A metal rod with an original length of 2 meters undergoes temperature changes. If the rod experiences a temperature increase from 25 degrees C to 38 degrees Celsius and a change in length of 5 mm, then determine the coefficient of area expansion.

• 1.92 x 10 ^ -4 per degree Celsius

• 3.85 x 10 ^ -4 per degree Celsius

• 5.77 x 10 ^ -4 per degree Celsius

A Carnot heat engine with an efficiency of 62% is operating a hot reservoir at 900 K. Determine the operation of the engine on a cold reservoir.

• 271 K

• 900 K

• 342 K

• 2369 J

A scientist is conducting an experiment involving water weighing 250 grams at 25°C. The goal is to raise the temperature of the water to 100°C, and then completely evaporate it into water vapor at 100°C. Given the specific heat of water is 4.18 J/g∘C and the latent heat of vaporization for water is 2265 J/g, calculate the total heat energy required for this entire process.

• 644,625 J

• 696,875 J

• 42,469,795 J

• 70,782,295 J