#1. a car moving at the rate of 65 miles per hour passes a truck moving in the same direction at 38 miles per hour . what is the speed of the car to the nearest mile per hour from the truck frame of reference ? #2. the x-43 is the fastest aircraft ever. it flew a distance of 3,961 km from los angeles to new york at the speed of 11,265 km/h . how long did it take the x-43 to fly that distance? #3. a mail carrier walked six blocked to the north one block to the east , and then six blocks to the south. what is the mail carriers displacement ?

Which describes an image that can be produced by a concave lens? the image is real and smaller than the object. the image is virtual and larger than the object. the image is virtual and smaller than the object. the image is real and larger than the object.

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.