The bond between carbon atoms in the molecule acetylene, HC=CH is referred to as
A) an ionic bond
B) a double bond
C) a single bond
D) a triple bond
D
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A ball is thrown with an initial speed of 60 m/s at an angle of 30° above the horizontal. What is the ball's horizontal displacement at the end of 4 seconds? Use g = 10 m/s2
A) 240 m B) 60 m C) 120 m D) 210 m E) 140 m
Solenoid: When you double the number of windings in an ideal solenoid while keeping all other parameters (radius, length and current) fixed, the magnetic field at the center of the solenoid will
A. double. B. triple. C. quadruple. D. be reduced by a factor of one-half. E. be reduced by a factor of one-fourth.
In a particle accelerator, protons are fired at a stationary target and collide elastically with the nuclei of the atoms in the target. In one such experiment, a beam of protons is fired with a speed of 2.10 × 107 m/s
The protons that undergo a collision rebound with a speed of 1.68 × 107 m/s. What is the mass of the nuclei that the protons are colliding against? A) 6.00 proton masses B) 7.00 proton masses C) 8.00 proton masses D) 9.00 proton masses E) 10.0 proton masses
A 60.0-Hz AC generator with a peak voltage of 110 V drives a series RC circuit with R = 10.0 ? and C = 300 ?F. The power factor, cos ?, is
A. ?1.00. B. ?0.749. C. +0.749. D. +0.834. E. +1.00.