The EPA primary standards guarantee that no person can be harmed by air pollution
What will be an ideal response?
Because the standards do not eliminate the pollutants, it is not possible that harm
to people's health can be eliminated.
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Rotational Dynamics: The drive chain in a bicycle is applying a torque of 0.850 N ? m to the wheel of the bicycle. You can treat the wheel as a thin uniform hoop (or ring) with a mass of 0.750 kg and a radius of 33.0 cm. What is the angular acceleration of the wheel?
A. 10.4 rad/s2 B. 20.8 rad/s2 C. 5.20 rad/s2 D. 3.43 rad/s2 E. 1.06 rad/s2
A star cluster with a lot of hot, blue stars must be relatively young
Indicate whether the statement is true or false
What are the dimensions of the diffusion constant?
A. 
B. 
C. 
D. 
E. 
A step-up transformer doubles a primary voltage 110 V (ac). What is the ratio of the number of turns in its primary coil to those in the secondary coil?
A) 1:4 B) 4:1 C) 2:1 D) 1:2 E) 1:8