The three types of nuclear radiation are
A. gamma, beta, alpha.
B. radiation, convection, conduction.
C. protons, electrons, neutrons.
D. electrical, strong nuclear, weak nuclear.
Answer: A
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For general projectile motion if we neglect air, the horizontal component of a projectile's velocity
A) remains zero. B) remains a non-zero constant. C) continuously increases. D) continuously decreases. E) first decreases and then increases.
A metal cylinder of radius 2.0 mm is concentric with another metal cylinder of radius 5.0 mm. If the space between the cylinders is filled with air and the length of the cylinders is 50 cm, the capacitance of the arrangement is
A) 33 pF. B) 60 pF. C) 22 pF. D) 30 pF. E) 11 pF.
An inventor develops a stationary cycling device by which an individual, while pedaling, can convert all of the energy expended into heat for warming water. What minimum power must be generated if 300 g of water (enough for 1 cup of coffee) is to be heated in 10 min from 30°C to 90°C? (1 cal = 4.186 J, the specific heat of water is 4 186 J/kg • °C)
a. 9400 W c. 160 W b. 590 W d. 130 W
When a ball undergoes a one-dimensional elastic collision with a wall, the velocity of the ball is reversed, while the wall remains stationary. Explain why this does not violate conservation of momentum
What will be an ideal response?