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A magnetic field B= 0.6T is directed upward through a circular loop of diameter 7 cm and 500 turns. The loop is initially horizontal, so it is perpendicular to the magnetic field. It rotates through a horizontal axis so that the plane of the loop is at 74° with the horizontal axis within 1 second. What is the magnitude of the induced emf?
Activity 1: Draw Me
Directions: Given the following information, construct the rejection region. Show the solution in a step-by-step procedure.
1. H0 : = 84
Ha : 84
m= 87, s= 10, n = 35, alpha= 0.05
2. H0 : = 45
Ha : < 45
m= 40, s = 12, n = 32, alpha= 0.01
The average zone of inhibition (in mm) for mouthwash L as tested by the medical technology students has been known to be 9mm. A random sample of 10 mouthwash L was tested and the test yielded an average zone of inhibition of 7.5mm with a variance of 25 mm. Is there enough reason to believe that the anti-bacterial property of the mouthwash has decreased? Test the hypothesis that the average zone of inhibition of the mouthwash is no less than 9mm using 0.05 level of significance.
A. State the hypotheses.
B. Determine the test statistic to use.
C. Determine the level of significance, critical value, and the decision rule.
D. Compute the value of the test statistic.
E. Make a decision.
F. Draw a conclusion.
If the average time spent studying is 10 hours and the standard deviation is 4 hours, what it the probability that a student will spend more than 13 hours studying?
6. A piece of aluminum with mass 1.00 kg and density 2 700 kg/m³ is suspended from a string and then completely immersed in a container of water. Calculate the tension in the string (a)
before and (b) after the metal is immersed.
3. A 950-kg cylindrical can buoy floats vertically in salt water. The diameter of the buoy is 0.900m. Calculate the additional distance the buoy will sink when a 70.0-kg man stands on top of it.
9. A sealed tank containing seawater to a height of 11.0 m also contains air above the water at a gauge pressure of 3.00 atm. Water flows out from the bottom through a small hole. How fast is this water moving?
7. Water runs into a fountain, filling all the pipes, at a steady rate of 0.750 m³/s. (a) How fast will it shoot out of a hole 4.50 cm in diameter? (b) At what speed will it shoot out if the
diameter of the hole is three times as large?
5. A Ping-Pong ball has a diameter of 3.80 cm and average density
of 0.084 0 g/cm3. What force is required to hold it completely
submerged under water?
4. A frog in a hemispherical pod, as shown in the figure on the right, just floats without sinking into a sea of blue-green ooze with density 1,35 g/cm3. If the pod has radius 6.00 cm and negligible mass, what is the mass of the frog?
