It is useful to study the geology of Mars because:
What will be an ideal response?
Answer: It helps us understand the geology of the Earth. By studying what similar and different features occur on the planets of different size and mass, we can better understand the physical processes that make our world what it is.
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A coil is wrapped with 300 turns of wire on the perimeter of a circular frame (radius = 8.0 cm). Each turn has the same area, equal to that of the frame. A uniform magnetic field is turned on perpendicular to the plane of the coil. This field changes at a constant rate from 20 to 80 mT in a time of 20 ms. What is the magnitude of the induced emf in the coil at the instant the magnetic field has a magnitude of 50 mT?
A. 24 V B. 18 V C. 15 V D. 10 V E. 30 V
What evidence do we have that an impact played a role in the extinction of the dinosaurs?
A. The dinosaurs, as well as large numbers of other animals and plants, disappeared rather suddenly. B. Astronomers have found evidence for a 65-million-year-old impact crater in the Yucatán. C. There is iridium (rare on Earth, but abundant in meteors) and soot (evidence of widespread fires) in a layer of clay laid down 65 million years ago. D. All of these choices are correct.
Think about the diagram representing the 10 essential services of public health. What are the core functions of public health?
What will be an ideal response?
Faraday's Law: A flux of 4.0 × 10-5 T ? m2 is maintained through a coil of area 7.5 cm2 for 0.50 s. What emf is induced in this coil during this time by this flux?
A. 8.0 × 10-5 V B. 4.0 × 10-5 V C. 3.0 × 10-5 V D. 2.0 × 10-5 V E. No emf is induced in this coil.