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A certain star exhibits a parallax angle of .016 arc seconds. What is the distance to the star in parsecs? If this star was located at a distance of 800 parsecs, what parallax angle would the star now exhibit?
The magnetic component of an electromagnetic wave in vacuum has an amplitude of 85.8 nT and an angular wave number of 4.40 rad/m. What is the rms value of the electric component
A spaceship and an asteroid are moving in the similar direction away from Earth with speeds of 0.76c and 0.40c, respectively. What is the relative speed between the asteroid and the spaceship?
Resistivity measurements on the leaves of corn plants are a good way to assess stress and overall health, What is the resistivity of the leaf tissue
Ideal incompressible water flows through a horizontal pipe of cross-sectional area 10.0 cm^2 at a pressure of 0.250 atm with a volume flow rate of 1.00 x 10^-3 m^3/s. What is the pressure at the valve
a person with a remote mountain cabin plans to install her own hydroelectric plant. a nearby stream is 3.00 m wide and
A place kicker should kick a football from a point 35m (about 38.0 yd) from the goal, and the ball should clear the crossbar, which is 3.05 m high. When kicked, ball leaves the ground with a speed of 21.0 m/s at an angle of 55° to the horizontal.
A radioactive atom at rest in the lab decays, sending two smaller nuclei in opposite direction. One fragment has a mass of 8.35 x 10-26 kg and moves at speed 0.770 c. what is its speed
Suppose a carbon atom is ionized and given a net positive charge of 1 elementary charge. What is the speed of the carbon after it has been accelerated in the potential
In an experiment on standing waves, a mechanical vibrator drives a string. Both ends of the string are fixed. The distance between the fixed ends is 80.0 cm. how much mass is hanging over the pulley
The average density of the planet uranus is 1.27 x 10^3 kg/m^3. The ratio of the mass of neptune to that of Uranus is 1.19. Find the average density of Neptune
a 0.30-kg puck initially at rest on a frictionless horizontal surface is struck by a 0.20-kg puck that is initially
An 8.70kg block slides with an initial speed of 1.66m/s up a ramp inclined at an angle of 27.4 degrees to the horizontal. The coefficient of kinetic friction among the block and the ramp is 0.3. Use energy conservation to discover the distance the bl..
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