1. The stack of magnets works as one big bar magnet. Do the poles change when you divide the magnet into pieces?

A shot-putter throws the “shot” (mass = 7.3 kg) with an initial speed of 14.7 m/s at a 34.0 ∘ angle to the horizontal.

Since the Sun is shining, and yet it changes very little over time, what does this tell us is going on inside the Sun?

A sump pump (used to drain water from the basement of houses built below the water table) is draining a flooded basement at the rate of 0.55 L/s, with an output pressure of 2.9 × 105 N/m2.

A 1.00-mol sample of an ideal diatomic gas, originally at 1.00 atm and 25 ∘C, expands adiabatically to 1.80 times its initial volume. What are the final pressure for the gas? (Assume no molecular vibration.) What are the final temperature for the gas? Express your

Fresh water flows horizontally from pipe section 1 of cross-sectional area A1 into pipe section 2 of cross-sectional area A2. The figure gives a plot of the pressure difference p2 – p1 versus the inverse area squared A1 -2 that would be expected for a

A baseball is hit with a speed of 30 m/s at an angle of 45.0∘ . It lands on the flat roof of a13.0-m-tall nearby building.

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Which of the following statements are true for an atom with 3 energy levels?

An oil gusher shoots crude oil 24.0 m into the air through a 0.100 m diameter pipe. Neglecting air resistance but not the resistance of the pipe, and assuming laminar flow, calculate the pressure at the entrance of the 45.0 m long vertical pipe. Take