A steel wire in a piano has a length of 0.700 m and a mass of 4.30 grams. To what tension must this wire be stretched to make the fundamental frequency correspond to middle C, (fc = 261.6 Hz)?
What will be an ideal response?
824 N
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A segment of a drive shaft (d2 5 200 mm, d1 5 160 mm) is subjected to a torque T 5 30 kN?m. The allowable shear stress in the shaft is 45 MPa. The maximum permissible compressive load P is approximately:
(A) 200 kN
(B) 286 kN
(C) 328 kN
(D) 442 kN
According to the principle of equivalence, observations made of falling objects at Galileo's Leaning Tower of Pisa are indistinguishable from observations made in
A) a spaceship orbiting in a gravitational field. B) a spaceship accelerating at g in deep space. C) any uniformly moving reference frame. D) all of the above E) none of the above
A ball is pushed downhill with an initial velocity of 3.0 m/s. The ball rolls down a hill with a constant acceleration of 1.6 m/s2 . The ball reaches the bottom of the hill in 6.0 s. What is the ball's velocity at the bottom of the hill?
a. 10 m/s b. 13 m/s c. 16 m/s d. 17 m/s
Neutron stars are 100,000 times denser than white dwarfs
Indicate whether the statement is true or false