A 20-g bullet moving at 1 000 m/s is fired through a one-kg block of wood emerging at a speed of 100 m/s. If the block had been originally at rest and is free to move, what is its resulting speed?

A 20-g bullet moving at 1 000 m/s is fired through a one-kg block of wood emerging at a speed of 100 m/s. What is the change in the kinetic energy of the bullet-block system as a result of the collision assuming the block is free to move?

At liftoff, the engines of the Saturn V rocket consumed 13 000 kg/s of fuel and exhausted the combustion products at 2 900 m/s. What was the total upward force (thrust) provided by the engines?

A bucket of water with total mass 23 kg is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. A crank with a turning radius of 0.25 m is attached to the end of the cylinder. What minimum force directed perpendicular to the crank handle is required to just raise the bucket? (Assume the rope’s mass is negligible, that cylinder turns on frictionless bearings, and that g = 9.8 m/s2.)

A 50-N crate is pulled up a 5-m inclined plane by a worker at constant velocity. If the plane is inclined at an angle of 37° to the horizontal and there exists a constant frictional force of 10 N between the crate and the surface, what is the force applied by the worker?

A model rocket sits on the launch pad until its fuel is ignited, blasting the rocket upward. During the short time of blast-off, as the ignited fuel goes down, the rocket goes up because:

A 20-g bullet moving at 1 000 m/s is fired through a one-kg block of wood emerging at a speed of 100 m/s. What is the kinetic energy of the block that results from the collision if the block had not been moving prior to the collision and was free to move?

Gramática; Actividad B B. Los verbos irregulares del pretérito: Tadeo visitó Puerto Rico. You will read Tadeo’s blog about his last trip home to Puerto Rico to visit his family and friends. First, review his blog. Then, for each blank, determine which verb is missing. Lastly, conjugate it in the preterit tense. [Note: If you cannot insert an accent, you will not lose points.] (2 pts. each: 1 pt. correct verb, 1 pt. correct conjugation in the preterit; 12 pts. total) MODELO: Intenté surfear pero no (1) pude [poder / decir / traer] porque las olas (waves) no estaban muy grandes. ¡Que lástima!  Hola, soy Tadeo. Nací en Puerto Rico pero vivo en Columbus, Ohio y estudio en la Universidad Estatal de Ohio (OSU). Quisiera (I would like) contarles sobre mi último viaje a Puerto Rico. Decidí viajar en marzo de 2019. ¡(1) [1] [Ir / Hacer / Estar] una semana en San Juan y una semana en Ponce. ¡Fueron dos semanas increíbles!   Primero, (2) [2] [poner / poder / ver] a mi familia y a mis amigos. La primera noche mi mamá invitó a toda la familia a la casa y ella nos (3) [3] [hacer / ir / poder] una cena grande. Comimos, charlamos y bailamos hasta la madrugada (dawn). Fue bueno ver a mi familia, especialmente a mi mejor amigo de la infancia, Rogelio. ¡Él y yo salimos casi todas las noches!   Una noche Rogelio y yo (4) [4] [ir / querer / tener] a una discoteca que estaba cerca de la casa de mis papás. En la discoteca conocimos a Olivia, una chica simpática. Ella nos (5) [5] [decir / ser / poder] que era su cumpleaños así que Rogelio la invitó a bailar. Todos nos divertimos mucho en la discoteca pero a la una de la mañana Rogelio y yo (6) [6] [ser / tener / poder] que irnos. ¡Al día siguiente íbamos a ir a la playa con mi familia y no queríamos estar muy cansados! 

A titanium sample contains half the number of atoms found in one mole of titanium. How many atoms are in the sample?

Which of the following is considered to be a Small Volume Nebulizer?I. Jet NebulizerII. Ultrasonic NebulizerIII. Vibrating Mesh NebulizerIV. Breath Enhanced NebulizerV. Aerogen Nebulizer