A vector starts at coordinate (3.0, 4.0) and ends at coordinate (?2.0, 16.0). What are the magnitude and direction of this vector?
What will be an ideal response?
13.0 m, 113°.
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Which fundamental quantity does the average person measure most often every day?
a. Mass b. Length c. Time d. Electric charge
In Figure 9.5, for the temperature 973 K, the power of the stress term changes between the logarithm of stress of 7 and the logarithm of stress of 7.3. Determine the value of the power n at these two values of stress, using the data points given to either side of these stresses.
What will be an ideal response?
Two radio antennas are 130 m apart on a north-south line. The two antennas radiate in phase at a frequency of 3.6 MHz
All radio measurements are made far from the antennas. What is the smallest angle, reckoned east of north from midway between the antennas, at which constructive interference of two radio waves occurs? (c = 3.00 × 108 m/s) A) 50° B) 55° C) 45° D) 40° E) 35°
The electrical force between two charged objects depends on
A. the total number of protons in both objects. B. the sum of the net charges on the objects. C. the product of the net charge on each of the two objects. D. just the magnitude of the largest charge. E. the number of electrons in the objects.