A car travels a distance of 80 km. for the first 30 minutes it is driven at a constant speed of 80 km/hr. the motor begins to vibrate and the driver reduces the speed to 40 km/hr for the rest of the trip. the average speed for the entire trip is?

In which sound wave application are sound waves absorbed? - echolocation - ultrasonic cleaners - ultrasound imaging

Match each projection to its description. A. Cylindrical projection B. Planar projection 1. Often, the center of the map is either the North or South Pole. 2. The map is distorted near the poles.

Which ionic compound is used as a building material?

20. Consider a model steel bridge that is 1/100 the exact scale of the real bridge that is to be built. a. If the model bridge weighs 50 N, what will the real bridge weigh? b.

How do cranial nerves transmit information to the senses?

Why is flammability a chemical property?

Luke pulls a sled using a force of 65 N for a distance of 25 m across level ground. The rope Luke pulls forms an angle of 25° with the ground. About how much work does Luke do on the sled? 250 J 690 J 1,500 J 1,600 J

Intramolecular and intermolecular forces hold together which of the following? A. atoms within a molecule B. molecules within an object C. charged particles within a salt crystal D. the atoms within compounds E. all of the above

Why is it that a football does not stay in motion at a constant speed when thrown, as the First Law of Motion suggests that it would? 1) Air resistance and acceleration 2) Gravity and mass 3) Distance, mass and gravity 4) Air resistance and gravity

A student pulls a box across a horizontal floor at a constant speed of 4.0 meters per second by exerting a constant horizontal force of 45 newtons. approximately how much work does the student do against friction in moving the box 5.