p3(5).png A torque of 1.20 N m is applied to a thin rod of mass 2.50 kg and length 50.0 cm pivoted about one end and at rest.  How fast is the rod spinning after 4.25 s?

p5(1)(1).png For the Atwood’s machine above the masses start from rest a distance d = 50.0 cm apart as shown.  m1 = 60.0 g,  m2 = 20.0 g,  M = 80.0 g, and R = 25.0 cm.  Determine the speed of m1 and m2 when they pass each other.  Treat the pulley as a uniform, frictionless, disk and the connecting string as massless.

A mass of 2.00 kg connected to a spring of spring constant 500.0 N/m undergoes simple harmonic motion with an amplitude of 30.0 cm. If the mass is at its amplitude x = A at time t = 0.00 s, what will be its acceleration at time t = 0.150 s?

How much heat does it take to vaporized 50.0 g of ice starting at a temperature of the melting point of ice (0 0C)?  Assume the ice does not sublimate.  (LF)water = 79.8 cal/g, (LV)water = 539 cal/g

p3(5).png Determine the angular momentum of a thin rod of mass 2.50 kg and length 50.0 cm rotating with and angular speed of 30.0 rad/s about an axis though one end.

A mass of 2.00 kg connected to a spring of spring constant 500.0 N/m undergoes simple harmonic motion with an amplitude of 30.0 cm. What is the angular frequency of oscillation?

A wave has a period 2.00 s, an amplitude 20.0 cm, and a wavelength 3.00 m. What is the speed of the wave?

5.  Política y estereotipos. In the article, “Hay un largo camino por recorrer: Tres mujeres comparten sus historias de superación de la violencia política en Colombia”, we read about stereotypes and politics. Think about the relationships between stereotypes, politics and what you learned by reading the article, and answer the following questions with a COMPLETE sentence (or two) in Spanish. Each answer must have at least 25 words. (10 points each answer, 30 points in total).   1. En tú opinión, ¿la identidad de una persona debe tener mucha importancia en la política?  Explica por qué sí o por qué no. 2. ¿Crees que las mujeres tienen que superar más desafíos que otras personas cuando quieren hacer política en los Estados Unidos? ¿Por qué sí o por qué no? 3. ¿Qué características son importantes para que una persona sea un buen político/una buena política/une buene polítique?   En caso de que los necesiten (copiar y pegar): á  é  í  ó  ú  Á É Í Ó Ú   ñ  ¿ ?  ¡  !

A sound source emits 30.0 W of sound power spread equally in all directions. What is the sound intensity level 30.0 m from the source?

50.0 g of superheated steam at 375 0C flows into a container holding 725 g of water at 20.0 0C.  Assuming no energy was lost, what was the equilibrium temperature of the mixture? (LV)water = 539 cal/g, csteam = 0.363 ca/g 0C