A tsunami originatig near the Alaska coast had a wavelength of 470 miles and traveled 2300 miles in 5.3 h. Determine the wave’s (a) speed in miles/hour and in m/s, (b) frequency and (c) period (in seconds and in minutes).

a) 433.96 miles/hr

   193.98 m/s

b) 3899.3 Hz

c) 2.56 x 10^-4

   0.015

Explanation:

wavelength of the tsunami = 470 miles

Distance traveled = 2300 miles

time taken to travel this distance = 5.3 h

a) wave's speed = distance/time

==> 2300/5.3 = 433.96 miles/hr

1 miles/hr = 0.447 m/s

433.96 miles/hr = 433.96 x 0.447 = 193.98 m/s

b) frequency of a wave f = speed/wavelength

for wavelength, 470 miles = 470 x 1609.34 = 756389.8 m

frequency = 756389.8/193.98 = 3899.3 Hz

c) Period T = 1/frequency

T = 1/3899.3 = 2.56 x 10^-4

60 sec = 1 min

Period T in sec = 2.56 x 10^-4 x 60 = 0.015

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation: