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Two students on roller skates stand face-to-face, then push each other away. One student has a mass of 99 kg and the second student 68 kg. Find the ratio of the magnitude of the first student's velocity to the magnitude of the second student's velocity.
You are listening to a pure tone of A440 (440. Hz). Without realizing it, you are doing this by noticing the time interval between the firing of the hair cells in your basilar membrane, What is this interval
The angular resolution of a radio telescope is to be 0.100 degrees when the incident wave has a wavelength of 3.00mm. What minimum diameter is required for the telescope's receiving dish
an object is shown next to a lens of focal length 50cm. Given that the image is also shown on the right side of the lens, determine the image location
An object of mass m = 5.45kg is suspended from the ceiling of an accelerating truck by a string. What is the magnitude of the tension in the string
Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.77x1011 m apart. The larger of the two stars has a mass of 3.63x1030 kg, and its center is 2.03x1011 m from the system's center of mass. What is the ma..
A light bulb is placed 22.3 cm in front of a concave mirror. Calculate the focal length of the concave mirror
A 10 m platform diver during his diving can increase his rotation rate from an initial rate of 1.2 rev/s to a maximum of 3.1 rev/s. what is his moment of inertia at his maximum rotation rate
The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 9.00 s, how many revolutions does the tub turn while it is in motion
A long solenoid has 140 turns/cm and carries current i. An electron moves within the solenoid in a circle of radius 2.60 cm perpendicular to the solenoid axis. Find the current i in the solenoid
initially a yoga ball is partially blown up and its surface area measured. afterwards it is filled completely and its
A Carnot engine whose high-temperature reservoir is at 680{\rm K} takes in 530{\rm J} of heat at this temperature in each cycle, What is the temperature of the low-temperature reservoir
In an experiment, 210 g of aluminum (with a specific heat of 900 J/kg·K) at 100°C is mixed with 48.0 g of water (4186 J/kg·K) at 20°C, What is the entropy change of the aluminum
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