Foucault's pendulum:
a. continues to swing back and forth in the same fixed direction relative to the ground.
b. keeps swinging faster because the centrifugal force of Earth's rotation affects its weight.
c. changes how far it goes on each swing because of Earth's motion around the Sun.
d. changes the direction of its back and forth swing because Earth rotates beneath it.
e. changes the direction of its back and forth swing because of gravity.
d
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An ideal solenoid 20 cm long is wound with 5000 turns of very thin wire. What strength magnetic field is produced at the center of the solenoid when a current of 10 A flows through it? (?0 = 4? × 10-7 T ? m/
A) A) 0.0063 T B) 0.20 T C) 3.2 T D) 4.8 T E) 0.31 T
Newton concluded that some force must act on the Moon because ____
a. a force is needed to pull the Moon away from straight-line motion b. a force is needed to pull the Moon outward c. a force is needed to keep the Moon in motion d. the Moon has at a constant velocity e. the Moon has a constant acceleration
A car that travels twice as fast as another car when braking to a stop will skid
A) twice as far. B) four times as far. C) depends on the mass of the cars.
Design a composite material made of epoxy and uniaxial E-glass fibers that has an axial elastic modulus of 50 GPa. The epoxy resin has an elastic modulus of 5 GPa, and the E-glass fibers have an elastic modulus of 72.4 GPa.
(a) What is the volum fraction of fibers and matrix in this composite? (b) What is the transverse elastic modulus of this material?