If the speed of a wave doubles while the wavelength remains the same, what happens to the frequency? 1. the frequency doubles. 2. cannot be determined 3. the frequency remains the same. 4. the frequency reduces by half.

Every ___ nerve impulses stimulate the breathing process or ventilation which moves air through a series of passages into and out of the lungs a. 5 to 7 seconds b. 3 to 5 seconds c. 1 to 3 seconds d. 7 to 9 seconds

How often should cardio exercises be performed? A. Never B. Three to five times a month C. Three to five times a week D. Three to five times a day

What is the role of a neutrons in the nucleus?

Which of the following cycles tracks the movement of the hydrosphere? A. the rock cycle B. the hydrogen cycle C. the water cycle D. the nitrogen cycle

Which condition is necessary for a standing wave? A) two interfering waves of the same frequency must travel in opposite directions B) two interfering waves of the same frequency must travel in the same direction C) two interfering waves of the same

Suppose a large truck on a hydraulic lift exerts 7,000 N of force on a piston with an area of 0.4 m2. The piston can only support 16,000 Pa of pressure. How much pressure is exerted by the truck on the piston?

A lamp hangs vertically from a cord in a descending elevator that decelerates at 1.7 m/s2. (a) if the tension in the cord is 63 n, what is the lamp's mass? (b) what is the cord's tension when the elevator ascends with an upward acceleration of 1.

A possible means of space flight is to place a perfectly reflectingaluminized sheet into orbit around the Earth and then use the lightfrom the Sun to push this "solar sail." Suppose a sail of area5.

Why must indirect evidence be used to study the structure of atoms?

Which of the following refers to the change in wavelength that occurs when an object moves toward or away from a source? A) Doppler effect B) Chromatic aberration C) Spectroscopy D) Wave theory of light