A plasma state of matter is
a. a conducting solid
b. a part of the blood
c. an ionized gas
d. a conducting liquid
e. none of the above
C
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A force of 3.8N directed along the positive x-axis combines with a second force directed along the positive y-axis to produce a total force vector of magnitude 6.1N. What is the magnitude of the second vector?
A. 2.7N B. 9.5N C. 23.5N D. 4.8N E. Not enough information is given.
An elephant can hear sound with a frequency of 15.0 Hz. What is the wavelength of this wave? The speed of sound in air is 343 m/s
What will be an ideal response?
A sphere of radius 10.0 cm floats in equilibrium partially submerged in water with its lowest point 5.00 cm below the water's surface. (a) What is the buoyant force acting on the sphere? (b) What is the weight of the sphere?
What will be an ideal response?
An asteroid in orbit about the Sun has a linear speed of 4 km/s when at a distance of closest approach d from the sun. What is its linear speed when it is at its greatest distance from the sun, a distance 4d?
a. 1 km/s c. 8 km/s b. 2 km/s d. 16 km/s