A car accelerates from rest to a speed of 19.0 m/s in 6.00 seconds. If the car weighs 16,000 N, what average power must the motor produce to cause this acceleration? Use g = 10 m/s2
A) 128 kW
B) 15.0 kW
C) 49.1 kW
D) 219 kW
E) 393 kW
C
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Which is the smallest particle?
A) molecule B) atom C) proton D) neutron E) quark
Which one [or ones] of the following is a possible final state for a star that has come to the end of its "lifetime" by running out of fuel and then gravitationally collapsing?
A) neutron star B) white dwarf C) black hole D) All of the above. E) None of the above.
Two long parallel wires that are 0.30 m apart carry currents of 5.0 A and 8.0 A in the opposite direction
Find the magnitude of the force per unit length that each wire exerts on the other wire and indicate if the force is attractive or repulsive. (?0 = 4? × 10-7 T ? m/A) A) 7.2 × 10-5 N attractive B) 2.7 × 10-5 N repulsive C) 3.4 × 10-5 N attractive D) 2.7 × 10-5 N attractive E) 7.2 × 10-5 N repulsive
A gun with a muzzle velocity of 100 m/s is fired horizontally from a tower. Neglecting air resistance, how far downrange will the bullet be 1 second later?
A) 50 m B) 98 m C) 100 m D) 490 m E) none of the above