How good or bad (in terms of pollution) the air is, is rated by a color-coded ________ Index
a. Irritant
b. Pollution
c. Air Quality
d. Pollen
c
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Mass on a Spring: A 2.0-kg block on a frictionless table is connected to two springs whose opposite ends are fixed to walls, as shown in the figure. The springs have force constants (spring constants) k1 and k2. What is the oscillation angular frequency of the block if k1 = 7.6N/m and k2 = 5.0 N/m?
A. 2.5 rad/s B. 3.5 rad/s C. 0.40 rad/s D. 0.56 rad/s
A 50-kg ice skater moving at 6 m/s collides with a second stationary skater with mass 70 kg. The skaters cling together after the collision and move without friction. Compute their speed after the collision
A proton is released such that it has an initial speed of 4.1 × 10^5 m/s from left to right across the page. A magnetic field of 0.8 T is present at an angle of 45° to the horizontal direction (or positive x axis). What is the magnitude of the force experienced by the proton? (qp = 1.6 × 10^?19 C)
a. 5.9E–33 N b. 9.3E–33 N c. 3.7E–14 N d. 4.5E–14 N e. 3.7E–14 N
A windowpane is half a centimeter thick and has an area of 1.10 m2 . The temperature difference between the inside and outside surfaces of the pane is 19.0 °C. What is the rate of heat flow through this window? (Thermal conductivity for glass is 0.840 J/s/m/°C.)
a. 7 020 J/s b. 3 510 J/s c. 4 180 J/s d. 1 850 J/s e. 2 200 J/s