GGR270H1 Lecture 9: lecture 9 note fall 2017

An ideal gas confined in a box initially has pressure p. If theabsolute temperature of the gas is doubled and the volume of thebox is quadrupled, the pressure is

a) p/8 b) p/4 c) p/2 d) p e) 2p

explain

<p>A cart is propelled over an xy plane w/ accelerationcomponents ax=4.0 m/s^2 and ay=-2.0 m/s^2. Its initial velocity hascomponents vox=8.0 m/s and voy=12 m/s. In vector unit notation whatis the velocity of the cart when it reaches its greatest ycoordinate?</p>
<p>From:</p>
<p>Fundamentals of Physics 9th edition</p>
<p>Halliday &amp; Resnick</p>
<p>chapter 4, pg79, problem 17</p>

<p>At this moment, my leg is 1.2 m away from a power cordcarrying 2.8 Amps of current. How does the magnetic field createdby this wire compare to the Earth's magnetic field of 0.5 G (5 x10^-4 T)?</p>
<p>a. More than a factor of 10 smaller that Earth's magneticfield</p>
<p>b. More than a factor of 10 larger than Earth's magneticfield</p>
<p>c. A similar order of magnitude</p>
<p>d. GOODNESS NO, GET OUT OF THERE! THAT FIELD ISLETHAL!</p>
<p>Please show steps to solve.</p>