True or false 1. The tropical cyclone track forecasting involves predicting where a tropical cyclone is
going to track over the thirty days, every 6 to 12 hours.
2. The Philippine Atmospheric, Geophysical and Astronomical, Services Administration
(PAGASA) tracks the tropical cyclone in the Philippines.
3. PAGASA means Philippine Atmospheric, Geophysical and Astronomical, Services
Agency.
4. Accurate track prediction depends on determining the position and strength of high-and
low-pressure areas, and predicting how those areas will migrate during the life of a tropical system.
5. The forces that affect tropical steering are the higher-latitude westerlies, the subtropical
ridge, and the beta effect caused by changes of the coriolis force within fluids such as atmosphere.

What is the frequency of a light wave with a wavelength of 620nm

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?