A scale from which a rock is suspended reads 5 N when the rock is out of water and 3 N when the rock is submerged. Buoyant force on the rock is
A) 2 N.
B) 3 N.
C) 4 N.
D) 5 N.
Answer: A
You might also like to view...
A flat plate is in a solar orbit 150,000,000 km from the sun. It is always oriented normal to the rays of the sun and both sides of the plate have a finish which has a spectral absorptance of 0.95 at wavelengths shorter than 3 ?m and 0.06 at wavelengths longer than 3 ?m. Assuming that the sun is a 5550 K blackbody source with a diameter of 1,400,000 km, determine the equilibrium temperature of the plate.
GIVEN
• A flat plate in solar orbit oriented normal to the rays of the sun
• Distance from the sun (R) = 150,000,000 km = 1.5 × 1011 m
• Spectral absorplatace (??) of both sides ??1 = 0.95 for ?1 < 3 ?m ??2 = 0.06 for ?1 > 3 ?m
FIND
• The equilibrium temperature of the plate (Tp)
ASSUMPTIONS
• The sun is a black body at Ts = 5550 K
• Sun diameter (Ds) = 1,400,000 km = 1.4 × 109 m
SKETCH
A newton is larger than a pound
a. True b. False Indicate whether the statement is true or false
Which of the following has the most kinetic energy?
A) a 4-ton truck moving 20 km/hr B) a 3-ton truck moving 30 km/hr C) a 2-ton truck moving 40 km/hr D) a 1-ton truck moving 50 km/hr E) A, B, C, and D all have the same kinetic energy.
A 1.00-kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position. The spring constant of the spring is 1.00 N/cm. The mass is pulled downward 2.00 cm and released
What is the speed of the mass when it is 1.00 cm above the point from which it was released? A) 0.0443 m/s B) 1.67 m/s C) 0.0201 m/s D) 1.73 m/s E) The mass will not reach the height specified.