If the mass of the object is doubled and the speed is halved then kinetic energy will change by a factor of: 2
4
1/2
1/4

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:

radiation warms things up temp rises convection currents air circ windy weather

the higher the current the higher the mag field around it the higher the influence on the compass

d) physical means can be used to separate the components of air.