What is the jet stream and how does it separate cold air to warm air?

Acricket ball of 70g moving with a velocity of 0.5 m/s is stopped by a player in 0.5s what is the force applied to stop the ball

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.

In an experiment, a die is rolled continually until a 6 appears, at which point the experiment stops. what is the sample space of this experiment. let en denote the even that n rolls are necessary to complete the experiment. what points of the sample space are contained in en? describe the event (∪ ∞ n=1en) c .