A 2.00-g bullet hits and becomes embedded in a 5.00-kg wood block which is hanging from a 1.20-m long string. This causes the block to swing through an arc of 3.50°. What was the speed of the bullet before it hit the block?
A) 16.7 m/s
B) 524 m/s
C) 25.3 m/s
D) 262 m/s
E) 789 m/s
B
You might also like to view...
A person throws a ball horizontally from the top of a building that is 40.0 m high. The initial velocity of the ball is 100 m/s. What is the horizontal distance that the ball travels before hitting the ground?
A) 100 m B) 286 m C) 325 m D) 367 m E) 572 m
A 1500 W portable heater is needed to replace the heat lost through a circular window in the wall of a home that is made of a single pane of glass 0.30 cm thick. Thermal conductivity for the glass is 0.63 W/mK. The temperature inside the house is 
and outside is 
What is the radius of the window?
A. 47 cm B. 53 cm C. 27 cm D. 7.1 cm E. 84 cm
Analyze the NASA sunspot image shown. Based on that image, what is (or was) the best year to go travel to high latitudes to see the Northern Lights?
a. 2001
b. 2009
c. 2012
d. 2014
Radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted. Why is this?
A) Radio waves are unpolarized, whereas light is normally polarized. B) The wavelength of light is much smaller than the wavelength of radio waves. C) The wavelength of light is much greater than the wavelength of radio waves. D) Radio waves are coherent and light is usually not coherent. E) Radio waves are polarized, whereas light is usually unpolarized.