3. A hydrogen-filled balloon that weighs 10 N must displace_ N of air in order to float in air. Ifit displaces less than _N it will be buoyed up with less than N and sink.
Ifit displaces more than
N of air it will move upward.
RATS TO YOU TOO,
DANIEL BERNOULLI!
4. Why is the cartoon more humorous to physics
types than to non-physics types? What physics
has occurred?

Astring that is fixed at both ends has a length of 1.05 m. when the string vibrates at a frequency of 91.0 hz, a standing wave with five loops is formed. (a) what is the wavelength of the waves that travel on the string? (b) what is the speed of the waves? (c) what is the fundamental frequency of the string?

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.

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration