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If a machine performs 1000 J of work in 50 seconds, its power is:
The force of friction always acts in a direction:
A projectile is thrown at an angle of 45 degrees with the horizontal. What is the time of flight if the initial speed is 20 m/s? (Assume g = 10 m/s²)
Which unit is commonly used to measure angles?
A. Degree
B. Meter
C. Radian
D. Newton
Answer: Degree
Subjects: Physical Quantities and Measurement, Physics
The ‘Schwarzschild Radius’ relates to:
A. The size of a black hole's event horizon
B. The wavelength of X-rays
C. The energy levels of electrons in an atom
D. The charge of a proton
Answer: The size of a black hole's event horizon
Subjects: Modern Physics, Physics
The ‘Quantum Zeno Effect’ describes:
A. The suppression of quantum state transitions due to frequent measurements
B. The interaction of light with matter
C. The effect of gravitational fields on quantum particles
D. The behavior of particles in high-energy collisions
Answer: The suppression of quantum state transitions due to frequent measurements
Subjects: Modern Physics, Physics
The ‘Superconductivity’ phenomenon is characterized by:
A. Zero electrical resistance and exclusion of magnetic fields
B. The emission of photons at high frequencies
C. The interaction of electrons with photons
D. The quantization of energy levels in solids
Answer: Zero electrical resistance and exclusion of magnetic fields
Subjects: Modern Physics, Physics
The ‘Quantum Teleportation’ involves:
A. The transfer of quantum information between distant particles
B. The transmission of photons through a vacuum
C. The measurement of particle velocities
D. The entanglement of particles in a single location
Answer: The transfer of quantum information between distant particles
Subjects: Modern Physics, Physics
The ‘Wavelength’ of a particle is related to:
A. Its momentum
B. Its mass
C. Its charge
D. Its temperature
Answer: Its momentum
Subjects: Modern Physics, Physics