A guitar string 0.650 m long has a tension of 61.0 N and a mass per unit length of 3.00 g/m
(a) What is the speed of waves on the string when it is plucked?
(b) What is the string's fundamental frequency of vibration when plucked?
(a) 143 m/s (b) 110 Hz
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The direction of an electric field is the direction of the force exerted on
A) a neutral test charge. B) an electron. C) an atom. D) a proton. E) a molecule.
The "giant impact hypothesis" refers to the idea that
a. our Moon formed when a Mars-size object collided with the young Earth. b. the planets formed when another star nearly collided with our Sun. c. dinosaur extinction was caused by the impact of an asteroid. d. large craters on the Moon were formed by large impacts.
A race car starts from rest on a circular track of radius 400 m. Its speed increases at the constant rate of 0.500 m/s2 . At the point where the magnitudes of the radial and tangential accelerations are equal, determine (a) the speed of the race car, and (b) the elapsed time
The variation in the pressure of helium gas, measured from its equilibrium value, is given by DP = 2.9 × 10^-5 cos (6.20x - 3 000t) where x and t have units m and s, and DP is measured in N/m2 . Determine the frequency (in Hz) of the wave
a. 1 500 b. 477 c. 1.01 d. 0.32 e. 239