Three different-mass projectiles are launched at different angles of elevation from the top of a building. Each particle has the same initial kinetic energy. Which particle has the greatest speed just as it impacts with the ground?
a. The one launched at the highest angle of elevation.
b. The one with the highest mass.
c. The one with the lowest mass.
d. They all will have the same speed on impact.
C
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The present atmospheres of the terrestrial planets probably originated from their internal activity.
Answer the following statement true (T) or false (F)
A parallel plate capacitor is charged to voltage V and then disconnected from the battery. Leopold says that the voltage will decrease if the plates are pulled apart. Gerhardt says that the voltage will remain the same. Which one, if either, is correct, and why?
A. Gerhardt, because the maximum voltage is determined by the battery. B. Gerhardt, because the charge per unit area on the plates does not change. C. Leopold, because charge is transferred from one plate to the other when the plates are separated. D. Leopold, because the force each plate exerts on the other decreases when the plates are pulled apart. E. Neither, because the voltage increases when the plates are pulled apart.
What are the mass number and the atomic number for each of the following:
(a) beta+? (b) beta-?
The position of an object that is oscillating on an ideal spring is given by the equation x = (12.3 cm) cos[(1.26s-1 )t]. At time t = 0.815 s,
(a) how fast is the object moving? (b) what is the magnitude of the acceleration of the object?