Questions from College Physics


Q: In free fall, we assume the acceleration to be constant.

In free fall, we assume the acceleration to be constant. Not only is air resistance ignored, but the gravitational field strength is assumed to be constant. From what height can an object fall to Eart...

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Q: Naturally occurring carbon consists of two different isotopes (excluding 14C,

Naturally occurring carbon consists of two different isotopes (excluding 14C, which is present in only trace amounts). The most abundant isotope is 12C. When carbon is placed in a mass spectrometer, 1...

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Q: An electromagnetic flowmeter is used to measure blood flow rates during surgery

An electromagnetic flowmeter is used to measure blood flow rates during surgery. Blood containing Na+ ions flows due south through an artery with a diameter of 0.40 cm. The artery is in a downward mag...

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Q: After being accelerated through a potential difference of 5.0 kV

After being accelerated through a potential difference of 5.0 kV, a singly charged 12C+ ion moves in a circle of radius 21 cm in the magnetic field of a mass spectrometer. What is the magnitude of the...

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Q: A sample containing 12C, 16O, and an unknown isotope is

A sample containing 12C, 16O, and an unknown isotope is analyzed in a mass spectrometer. As in Fig. 19.17(a), the ions move around a semicircle before striking a photographic plate. The 12C+ and 16O+...

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Q: A rectangular loop of wire, carrying current I1 = 2.

A rectangular loop of wire, carrying current I1 = 2.0 mA, is next to a very long wire carrying a current I2 = 8.0 A. (a) What is the direction of the magnetic force on each of the four sides of the r...

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Q: A boy of mass 60.0 kg is rescued from a

A boy of mass 60.0 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 8.0 m above the net. The firefighters lower their arms as he lands in the net...

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Q: Radium-226 decays as /. If the

Radium-226 decays as /. If the / nucleus is at rest before the decay and the / nucleus is in its ground state, estimate the kinetic energy of the alpha particle. (Assume that the / nucleus take...

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Q: A battery charger delivers a current of 3.0 A for

A battery charger delivers a current of 3.0 A for 4.0 h to a 12 V storage battery. What is the total charge that passes through the battery in that time?

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Q: Peggy drives from Cornwall to Atkins Glen in 45 min. Cornwall

Peggy drives from Cornwall to Atkins Glen in 45 min. Cornwall is 73.6 km from Illium in a direction 25° west of south. Atkins Glen is 27.2 km from Illium in a direction 15° south of west. Using Illium...

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