do blood cells have a rigid cell wall

Why do surfers like water waves with high amplitudes

What does it mean to say that electricity is a secondary energy source?

Which of these is an example of a scientific theory? A. "We saw a raccoon last night." B. "I think I left my notebook in science class." C. "The blue whale is the largest type of whale." D. "The farther away a galaxy is, the faster it is moving."

How scientists determined that the moon has no tectonics?

In certain martial arts, people practice breaking a piece of wood with the side of their bare hand. Use your understanding of impulse to explain how this can be done without injury to the hand.

How would life on earth be different if earth's axis were not tilted with respect to its orbit? A. There would be no seasons. B. There would be no day and night. C. All places would have the same climate. D. The seasons would be much shorter.

What will a spring scale read for the weight of a 75.0-kg woman in an elevator that moves upward with constant speed of 5.8 m/s?

What's the definition of: • cellular respiration • photosynthesis

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?