Uniform Circular Motion: A Ferris wheel has radius 5.0 m and makes one revolution every 8.0 s with uniform rotation. A person who normally weighs 670 N is sitting on one of the benches attached at the rim of the wheel. What is the apparent weight (the normal force exerted on her by the bench) of the person as she passes through the highest point of her motion?
Fill in the blank(s) with the appropriate word(s).
460 N
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The position of an object is given by 
where t is in seconds. At t = 2.0 s, what is the magnitude of the particle's acceleration?
A. 0 m/s2 B. 2.0 m/s2 C. 17 m/s2 D. 36 m/s2 E. 72 m/s2
How do we know the mass of Neptune?
A) the period and size of Neptune's orbit around the Sun B) the orbital speed of Neptune moving around the Sun C) the size and density of Neptune D) the distance of Neptune from the Earth and its rotation period E) the periods and sizes of the orbits of the moons around Neptune
True or False: A photon is reflected from a mirror. Because a photon has zero mass, it does not exert a force on the mirror
1.True 2.False
The specific of ice is 2.10 kJ/kg 
the heat of fusion for ice at 0
is 333.7 kJ/kg, the specific heat of water 4.186 kJ/kg 
and the heat of vaporization of water at 100
is 2256 kJ/kg. What is the final equilibrium temperature when 10.0 grams of ice at -15.0
is mixed with 3.00 grams of steam at 100
A. 60.2
B. 65.0
C. 70.2
D. 76.4
E. 80.3