Most millisecond pulsars are found in ________ star clusters
Fill in the blank(s) with correct word
globular
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A neutral atom always contains
a. the same number of protons as it does neutrons. b. the same number of electrons as it does neutrons. c. the same number of protons as it does electrons. d. twice as many protons as it does neutrons. e. twice as many neutrons as it does protons.
If the initial interstellar cloud in star formation has a mass sufficient to form hundreds of stars, how does a single star form from it?
A) One star forms at its center and blows the rest of the matter back into space. B) The cloud fragments into smaller clouds and forms many stars at one time. C) One star forms and the rest of the matter goes into making planets, moons, and other objects of a solar system. D) The cloud is disrupted by rotation so that it reduces its mass down to that of a typical star. E) A supernova blows the cloud up and dissipates the majority of the gas.
A circular coil (radius = 0.40 m) has 160 turns and is in a uniform magnetic field. When the orientation of the coil is varied through all possible positions, the maximum torque on the coil by magnetic forces is 0.16 N / m when the current in the coil is 4.0 mA. What is the magnitude of the magnetic field?
a. 0.37 T b. 1.6 T c. 0.50 T d. 1.2 T e. 2.5 T
A 100 g glass container contains 250 g of water at 
A 100 g piece of unknown material at 
is added to the water in the container. The final temperature of the mixture is 
What is the specific heat of the unknown material in 
(specific heat of water 
specific heat of glass
A. 245 B. 387 C. 412 D. 558 E. 674