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Consider three ants each clinging for dear life to the top surface of an ordinary compact disc and not moving with respect to the labelling. The ants are at distances 3, 4, and 5 cm away from the axis of rotation of the CD which is spinning at a constant angular velocity because music on the other side is being played. Rank, from largest to smallest, both the speed and acceleration of each ant. Explain your answers.
A gray kangaroo can bound across level ground with each jump carrying it 8.1m from the takeoff point. What is its maximum height above the ground
A building made with a steel structure is 650 m high on a winter day when the temperature is 0°F. How much taller (in cm) is the building
An airplane propeller is 2.38m in length (from tip to tip) and has a mass of 117kg. What is the angular acceleration of the propeller
The force of gravity acting on the arm acts through point A. Identify the magnitudes of the tension force t in the deltoid muscle and the force s of the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown.
a cube of wood floating in water supports a 200g mass at the centre of its top face. when the mass is removed, the cube rises by 2cm. determine the volume of the cube
A hydrogen atom initially in the ground state absorbs a photon, which excites it to the n = 12.0 state. Determine the frequency of the photon
The velocity of an object undergoing linear drag and no other forces can be described as: v(t)=v0e^t/?, Calculate the position x(t), and acceleration a(t) of the particle as a function of time t
A sphere of mass 3.00 g is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 28.0° with the vertical. Determine the tension in the cord
A tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 52.5 m/s and returns the shot with the ball traveling horizontally at 38.5 m/s in the opposite direction
An athlete at the gym holds a 1.2 kg steel ball in his hand. His arm is 64 cm long and has a mass of 4.0 kg. Evaluate the magnitude of the torque about his shoulder if he holds his arm straight, but 30 degrees below horizontal?
A lead block is suspended from the underside of a 0.8 kg block of wood of density of 720 kg/m3. determine the mass of the lead block
An upright object is placed a distance in front of a converging lens equal to twice the focal length (f1) of the lens. On the other side of the lens is a converging mirror of focal length f2 separated from the lens by a distance 2(f1+f2).
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