The position of an object at equal time intervals is shown below:
Which graph below correctly represents position versus time for this object?
a.
e
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The region on the H-R diagram where pulsating variables occur is called the:
A) period-luminosity relation. B) mass-luminosity relation. C) instability strip. D) horizontal branch. E) main sequence appendix.
A car travels in a due northerly direction at a speed of 55 km/h. The traces of rain on the side windows of the car make an angle of 60 degrees with respect to the horizontal. If the rain is falling vertically with respect to the Earth, what is the speed of the rain with respect to the Earth?
A. 48 km/h B. 95 km/h C. 58 km/h D. 32 km/h E. 80 km/h
What is the force per meter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T so that the wire makes an angle of 27° with respect to the magnetic field lines
A) 0.045 N/m B) 0.26 N/m C) 0.022 N/m D) 0.17 N/m
A 280-lb linebacker running down the field at 7 m/s tackles a 240-lb halfback running up the field at 9 m/s. Will the halfback gain or lose yards after he is tackled?
A. gain B. lose C. neither gain nor lose