Answer:
Multiply the wavelength by the frequency.
Explanation:
The velocity of a wave is the frequency times the wavelength.
Answer:
B. Dust storm
Explanation:
A meteorologist would predict dust storm most likely. Before dust storm the air condition and air pressure reduces in the particular area which indicate towards a dust storm. As pressure of a region reduces the air of the neighboring area try to maintain that pressure and rush towards low pressure area and causes dust storm.
40% of the Earth's surface is covered by continental crust.
Answer:
Part a)

Part b)

Explanation:
Part a)
mass of the Falcon bird is given as

initial speed of the bird is

final speed of the bird is given as
(opposite direction)
So here the impulse given by falcon bird is given as



now the final momentum of Raven bird in perpendicular direction is given as



now the change in the angle of the raven bird is given as



Part b)
Final speed of the raven bird is given as



Work is (force applied) x (distance through which the force moves).
Since the suitcase doesn't move up or down during the 15 minutes,
no work is done ... zero, zip, nada ... according to the real Physics
definition of 'work'.