Due to the first strong commercial radio stations, our radio presence is now known out to over about 70 light years
Indicate whether the statement is true or false
TRUE
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A 2.0-kg particle has an initial velocity of 
m/s. Some time later, its velocity is
m/s. How much work was done by the resultant force during this time interval, assuming no energy is lost in the process?
A. 17 J B. 49 J C. 19 J D. 53 J E. 27 J
If a quasar has a recessional velocity of 2.7x 105 km/sec and is determined to be 3600 Mpc, what is the Hubble constant based on this quasar alone? Hint: Note that the units of your result should be (km/sec)/Mpc to see what arithmetic process you need to do on a calculator
a. 50 km/sec/Mpc b. 9.7x 108 (km/sec)Mpc c. 75 km/sec/Mpc d. 0.013 km/sec/Mpc e. 273,600 km/sec/Mpc
Springs: How much work is required to stretch an ideal spring of spring constant (force constant) 40 N/m from x = 0.20 m to x = 0.25 m if the unstretched position is at x = 0.00 m?
A. 0.45 J B. 0.80 J C. 1.3 J D. 0.050 J
A 7.0-kg rock is subject to a variable force given by the equation F(x) = 6.0 N - (2.0 N/m)x + (6.0 N/m2)x2 If the rock initially is at rest at the origin, find its speed when it has moved 9.0 m
What will be an ideal response?