The capacitive reactance of a capacitor is very small at low frequencies
Indicate whether the statement is true or false
FALSE
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A ruby laser beam (? = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, 384,000 km away. What is the radius of the big red spot on the moon?
a. 500 m b. 250 m c. 120 m d. 1.0 km e. 2.7 km
An object moves with a constant speed of 30 m/s on a circular track of radius 150 m. What is the acceleration of the object?
A) 0 m/s2 B) 0.17 m/s2 C) 5.0 m/s2 D) 6.0 m/s2
What is Right-Hand Rule used to determine?
a) Given the directions of the magnetic field and the velocity of a charged particle, it is used to find the direction of the magnetic force on the particle. b) Given the directions of the magnetic field and magnetic force on a charged particle, it is used to determine the magnitude and sign of charge on the particle. c) Given the magnitude and sign of the charge on a particle and the direction of the magnetic force, it is used to determine the net force on the particle. d) It is used to determine the direction of the "reaction force" when applying Newton's third law of motion to the particle.
When water freezes, it expands about nine percent. What would be the pressure increase inside your automobile engine block if the water in there froze? (The bulk modulus of ice is 2.0 × 10^9 Pa, and 1 atm = 1.0 × 10^5 Pa.)
a. 18 atm b. 270 atm c. 1 080 atm d. 1 800 atm