Two particles (m1 = 0.20 kg, m2 = 0.30 kg) are positioned at the ends of a 2.0-m long rod of negligible mass. What is the moment of inertia of this rigid body about an axis perpendicular to the rod and through the center of mass?
a. 0.48 kg/m2
b. 0.50 kg/m2
c. 1.2 kg/m2
d. 0.80 kg/m2
e. 0.70 kg/m2
a
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A charged particle (m = 5.0 g, q = ?70 ?C) moves horizontally at a constant speed of 30 km/s in a region where the free fall gravitational acceleration is 9.8 m/s2 downward, the electric field is 700 N/C upward, and the magnetic field is perpendicular to the velocity of the particle. What is the magnitude of the magnetic field in this region?
a. 47 mT b. zero c. 23 mT d. 35 mT e. 12 mT
In the case of alpha decay, the atomic number of the nucleus increases
Indicate whether the statement is true or false
What is the total electric flux through a closed surface containing a 2.0 ?C charge?
a. 
b. 
c. 
d. 
e. 0
Runaway convection in Earth's atmosphere can lead to a. snow.
b. destruction of ozone. c. auroras. d. acid rain. e. violent storms.