How much kinetic energy does a 0.30-kg stone have if it is thrown at 44m/s
A) 290 J
B) 580 J
C) 440 J
D) 510 J
A
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A 2.00 kg mass is moving in a circular path with a radius of 5.00 cm. The mass starts from rest and with constant angular acceleration, obtains an angular velocity of 6.00 rad/sec in 3.00 sec. The mass then comes to a stop with constant deceleration in 4.00 sec. The centripetal component of acceleration of the mass at 2.00 sec is
A. 1.220 
B. 0.980
C. 0.806
D. 0.656
E. 0.520
A jumper in the long-jump goes into the jump with a speed of 12 m/s at an angle of 20° above the horizontal. How far does the jumper jump?
A) 3.4 m B) 6.2 m C) 9.4 m D) 15 m E) 18 m
A 1 000-V battery, a 3 000-? resistor, and a 0.50-?F capacitor are connected in series with a switch. The time constant for such a circuit, designated by the Greek letter, ?, is defined as the time that the capacitor takes to charge to 63% of its capacity after the switch is closed. What is the current in the circuit at a time interval of ? seconds after the
switch has been closed?
a.
0.14 A
b.
0.21 A
c.
0.12 A
d.
0.32 A
The meteorites that strike Earth are:
A) pieces of comets that fall to Earth. B) mostly made of iron. C) the oldest rocks known. D) the remains of the planet between Mars and Jupiter. E) material from outside our solar system.