A horizontal uniform bar of mass 2.4 kg and length 3.0 m is hung horizontally on two vertical strings. string 1 is attached to the end of the bar, and string 2 is attached a distance 0.74 m from the other end. a monkey of mass 1.2 kg walks from one end of the bar […]
A beam of sound arrives perpendicular to your abdomen from the air. what’s the percentage of sound energy density enters your body (regard as water)? (speed of sound in air and water is 340m/s and 1,500m/s; density of air and water is 1.2kg/m3 and 1,000kg/m3).
(a) find the potential at point p. (q = 2.5 x 10-9c, a = 50 cm) (b) how much work by an external force is required to move a charge of – 3 µc to point p. (c) if the particle (mass = 5.0 µg) were released from rest at point p, what would be […]
The gravitational acceleration on a planet’s surface is 16.0 m/s2. what is the gravitational acceleration at an altitude of one planet diameter above the surface of the planet?
At a pressure of one atmosphere oxygen boils at −182.9°c and freezes at −218.3°c. consider a temperature scale where the boiling point of oxygen is 100.0°o and the freezing point is 0°o. determine the temperature on the oxygen scale that corresponds to the absolute zero point on the kelvin scale.
The desk has a weight of 75 lb and a center of gravity at g. determine its initial acceleration if a man pushes on it with a force f = 60 lb. the coefficient of kinetic friction at a and b is mk = 0.2.
Consult concept simulation 6.1 in preparation for this problem. a golf club strikes a 0.065-kg golf ball in order to launch it from the tee. for simplicity, assume that the average net force applied to the ball acts parallel to the ball’s motion, has a magnitude of 6170 n, and is in contact with the […]
Calculate wa, the work done by the gas as it expands along path a from v0 to va=rvv0. express wa in terms of p0, v0, and rv.
68 kg tennis ball is given an angular momentum of .00272 kgm2/s when struck by a racquet. if its radius of gyration is 2 cm, what is its angular velocity
A 129-kg astronaut (including space suit) acquires a speed of 2.30 m/s by pushing off with her legs from a 1850-kg space capsule. use the reference frame in which the capsule is at rest before the push. part a what is the velocity of the space capsule after the push in the reference frame?
