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A 0.50 kg ball that is tied to the end of a 1.2 m light cord is revolved in a horizontal plane with the cord making a 30° angle, with the vertical. a) Determine the ball's speed.
What is the velocity (magnitude and direction) of train A as seen by the passengers in train B? (b) What is the velocity (magnitude and direction) of train B as seen by the passengers in train A?
The only colors that are absent from the reflected light are blue (458nm) and red (687nm). Estimate the thickness of the oil film.
Summarize the four major theories of emotion. Identify which theory of emotion you think is the most valid. What makes this theory more valid to you than the others?
How are thinking, intelligence, and creativity related? Does one's creativity illustrate anything about his or her thinking processes or level of intelligence?
Loudspeaker are connected in paraelle across the terminals of an amplifier. assuming the speakers behave as resistors, calculate the equivilent resistance of the two speakers.
Calculate g for space shuttle territory, 280 kilometers above the Earth's surface (dashed line in sketch). Earth's mass is 6 1024 kg, and its radius is 6.38 106 m (6380 km).
The initial and final velocities of the car are vi=-15i m/s and vf=2i. If the collision lasts for 0.15 s, find the average force exerted by the car.
A hurricane at latitude 30° N has a velocity within 25 km of the eye of 50m s-1, and a velocity around the outer edge (radius 400km) of 10 m s-1. By calculating the pressure gradient and the con
A 27.5 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley. Calculate the mass of sand added to the bucket.
Fnd (a) the number of revolutions the tire makes during this motion, assuming that no slipping occurs. (b) What is the ?nal rotational speed of a tire in revolutions per second?
A block of mass M hangs from a rubber cord. The block is supported so that the cord is not stretched. Determine the tension in the cord when the block is at this lowest point.
A single 1.1 mu F capacitor is connected across the terminals of a 60-{rm Hz} voltage source, and a current of 2.0 {rm mA} is measured on an ac ammeter. What is the capacitive reactance of the capac
A 3.9 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 18 N. Find the speed of the block after it has moved 4.9m.
Determine the centripetal force acting on the ball, and (b) If the speed is doubled does the centripetal force double? If not, by what factor does the centripetal force increase?
How many rotations per minute is the sample making if it is located 5.00 centimeters from the axis of rotation of the centrifuge?
A rectangular coil in the plane of the page has dimensions a = 46.00 m and b = 80.00 m. A long wire that carries a current I = 4.50 A is placed directly above the coil. For what value of x is magni
A metal rod 40.0000-cm long at 40 °C is heated to 60 °C. The length of the rod is then measured to be 40.0105 cm. What is the coefficient of linear expansion of the metal?
Determine the speed and centripetal acceleration of a person situated (a) at the equator, and (b) at a latitude of 30.0 degrees north of the equator.
A circular loop of wire with a diameter of 0.626 m is rotated in a uniform electric field to a position where the electric flux through the loop is a maximum. At this position, the electric flux is
An 9.0 kg mass, m(sub)1, on a frictionless table is accelerated by a 3.0-kg mass, m(sub)2, hanging over the edge of the table. What is the acceleration of the mass along the table?
The spring sends the bearing to a height of 1.43 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 29.0 deg from the horizontal.
A uniform non-conducting ring of radius 2.92 cm and total charge 3.49 μC rotates with a constant angular speed of 5.2 rad/s around an axis perpendicular to the plane of the ring that passes thro
If the loop is placed in a uniform magnetic field of magnitude 0.300 T, what is the maximum torque that can act on it? The resistivity of copper is 1.7 10-8 · m.
What is the value of R4 for balance? If R4 = 200 ohm and the bridge is driven with a source of 200 V. What is the open circuit voltage?