A flatbed truck is carrying a 20.0-kg crate down a sloping road inclined 15.0° below the horizontal. The coefficient of static friction between the crate and the bed is 0.400
What is the maximum acceleration that the truck can have if the crate is to stay in place? A) 1.25 m/s2
B) 0.625 m/s2
C) 2.50 m/s2
D) 3.16 m/s2
E) 6.33 m/s2
E
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Volcanism can occur in a midocean rift, above a hot spot in the mantle, or where one tectonic plate slides below another
Indicate whether the statement is true or false
If the relative magnetic permeability of a material is equal to 0.99999, this material is
(a) Diamagnetic. (b) Paramagnetic. (c) Ferromagnetic. (d) Antiferromagnetic.
A car of mass 1100 kg that is traveling at 27 m/s starts to slow down and comes to a complete stop in 578 m. What is the magnitude of the average braking force acting on the car?
A) 410 N B) 340 N C) 550 N D) 690 N
Two radio antennas are 10 km apart on a north-south axis on high mountain tops at the seacoast. The antennas broadcast identical AM radio signals,
in phase, at a frequency of 4.70 MHz. A steamship, 200 km offshore, travels toward the north at 15 km/h and passes east of the antennas. A radio on board the ship is tuned to the broadcast frequency. The reception of the radio signal on the ship is a maximum at a given instant. How much later until the next occurrence of maximum reception? (c = 3.00 × 108 m/s) A) 5.1 min B) 3.8 min C) 6.4 min D) 7.7 min E) 8.9 min