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1. When a rock thrown straight upwards gets to the exact top of its path, its
A) velocity is about 10 m/s and its acceleration is zero.
B) velocity is zero and its acceleration is zero.
C) velocity is zero and its acceleration is about 10 meters per second per second.
D) velocity is about 10 m/s and its acceleration is about 10 meters per second per second.
E) none of these
2. While a car travels around a circular track at a constant speed its
A) inertia is zero.
B) acceleration iszero.
C) velocity is zero.
D) none of the above
when you drop a .40 kg apple, Earth exerts a force on it that accerlerates it at 9.8 m/s/s toward Earth's surface. what is the magnitude of Earth's acceleration
a 2.50 kg firework shell is fired straight up from a mortar and reaches a height of 110 m. Neglecting air resistance, calculate the shell's velocity when it leaves the mortar
A satellite is in a circular orbit about the earth (M = 5.98 x 1024 kg). The period of the satellite is 6.84 x 104 s. What is the speed at which the satellite travels
A ray of one color, for which n=1.51, and a ray of another color, for which n=1.6, travel through a piece of glass. What is the angle between the two rays in the glass
The plates of a spherical capacitor have radii 34.0 mm and 50.0 mm. Calculate the capacitance.
A 190-?F capacitor and a 80m H inductor are in series with a 105 ? resistor. What is the impedance at the resonant frequency
q1. in a science fiction story a microscopic black hole is given an enormous positive charge by firing an
The angular momentum of a flywheel having a rotational inertiaof 0.200 kg·m2 about itscentral axis decreases from 3.20 to 1.200 kg·m2/sin 1.60 s. What is the average power of the flywheel?
A circular coil of 180 turns has aradius of 1.30 cm. (a) Calculate the current that results in a magnetic dipole moment of 2.30A·m2.(b) Find the maximum torque that the coil,carrying this current, can experience in a uniform 50.0 mT magnetic field
A car travels east at 77 km/h for 6.0 h. It then travels 40.0° east of north at 112 km/h for 6.0 h. What is the average velocity for the trip
consider two spheres with two masses and two charges. at a distance of 119.0 m the ratio of the electric force to the
At what temperature is the diameter of the hole equal.
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