Which describes the changes in Earth's motion? The speed increases from W to X because a
component of the gravitational force acts in the
direction opposite to the velocity
The speed increases from W to X because a
component of the gravitational force acts in the
direction of the velocity.
The speed increases from X to W because a
component of the gravitational force acts in the
direction opposite to the velocity.
The speed increases from X to W because a
component of the gravitational force acts in the
direction of the velocity.

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:

measuring things 1 litre of water

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me