The Galileo spacecraft dropped a probe into Jupiter's atmosphere that survived to a depth of about 200 kilometers, or 0.3% of Jupiter's radius. Which is the deepest layer in which this probe was able to make measurements?
A) the gaseous hydrogen layer
B) the liquid hydrogen layer
C) the metallic hydrogen layer
D) the core
A) the gaseous hydrogen layer
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A cyclotron is designed to accelerate protons (mass 1.67 x 10-27 kg) up to a kinetic energy of 2.5 x 10-13 J. If the radius of the dipole magnets is 96 cm, what is the magnetic field used in the cyclotron?
A. 35 mT B. 0.13 T C. 0.19 T D. 0.21 T
Energy in Capacitors: An air-filled capacitor has a potential difference between the plates of 80 V. If the charge on each of the plates of the capacitor has magnitude 8.0 ?C, what is the electrical energy stored by this capacitor?
A. 640 µJ B. 320 µJ C. 50 nJ D. 60 nJ E. 30 pJ
Answer the following statement(s) true (T) or false (F)
1. The current flow in the wire is constant in time. 2. The current is the same for any cross-sectional area spanning the wire at any point along the wire. 3. The electric field inside the wire is zero. 4. The net charge density in the wire’s interior is zero. 5. Excess charges may be found on the wire’s surface.
Imagine hitting a heavy anvil with a hammer. The hammer is in contact with the metal for a short period of time. How do you suppose the time of contact depends upon how hard you hit the anvil (i.e
, does a hard hit remain in contact much longer or shorter than a light tap?) [It is reasonable to assume Hooke's law of elasticity to hold.]