Staring from rest, an Apache helicopter’s rotors undergo an angular acceleration of 0.75 rad/s2. a. How fast will they be traveling in 60 seconds?
b. How many radians have they rotated through?
c. What is the linear velocity of the tip of the rotors (R = 7.3 m)?

How many neutrons does element x have if it’s stormy umber is 33 and it’s mass number is 95?

Air is held within a frictionless piston-cylinder container, which is oriented vertically. the mass of the piston is 0.45 kg and the cross-sectional area is 0.0030 m2. initially (state 1) the pressure of the gas is sufficient to support the weight of the piston as well as the force exerted by the atmospheric pressure ( 101.32 kpa). the volume occupied by the air within the cylinder in state 1 is 1.00 liter. one end of a spring (with spring constant k = 1000 n/m) is attached to the top of the piston, while the other end of the spring is attached to a stage that can move vertically. initially the spring is undeflected and therefore exerts no force. then the stage is then moved quasistatically downward a distance of 10.0 cm, at which point the system reaches state 2. the piston-cylinder is not insulated; rather it remains in diathermal contact with the surroundings, which are at a constant temperature of 300 k. what is the change of pressure within the container?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain