Questions from Modern Physics

Q: The icecaps of Greenland and Antarctica contain about 1.75%

The icecaps of Greenland and Antarctica contain about 1.75% of the total water (by mass) on the earth’s surface; the oceans contain about 97.5%, and the other 0.75% is mainly groundwater. Suppose the...

Q: The longest pipe found in most medium-size pipe organs is

The longest pipe found in most medium-size pipe organs is 4.88 m (16 ft) long. What is the frequency of the note corresponding to the fundamental mode if the pipe is (a). open at both ends, (b). ope...

Q: As a physicist, you put heat into a 500.0

As a physicist, you put heat into a 500.0-g solid sample at the rate of 10.0 kJ/min while recording its temperature as a function of time. You plot your data as shown in Fig. P17.111. (a). What is the...

Q: At a chemical plant where you are an engineer, a tank

At a chemical plant where you are an engineer, a tank contains an unknown liquid. You must determine the liquid’s specific heat capacity. You put 0.500 kg of the liquid into an insulated metal cup of...

Q: During your mechanical engineering internship, you are given two uniform metal

During your mechanical engineering internship, you are given two uniform metal bars A and B, which are made from different metals, to determine their thermal conductivities. Measuring the bars, you de...

Q: Estimate the number of atoms in the body of a 50-

Estimate the number of atoms in the body of a 50-kg physics student. Note that the human body is mostly water, which has molar mass 18.0 g/mol, and that each water molecule contains three atoms.

Q: A person at rest inhales 0.50 L of air with

A person at rest inhales 0.50 L of air with each breath at a pressure of 1.00 atm and a temperature of 20.0°C. The inhaled air is 21.0% oxygen. (a). How many oxygen molecules does this person inhale...

Q: You have two identical containers, one containing gas A and the

You have two identical containers, one containing gas A and the other gas B. The masses of these molecules are mA = 3.34 × 10-27 kg and mB = 5.34 × 10-26 kg. Both gases are under the same pressure and...

Q: A sealed box contains a monatomic ideal gas. The number of

A sealed box contains a monatomic ideal gas. The number of gas atoms per unit volume is 5.00 × 1020 atoms/cm3, and the average translational kinetic energy of each atom is 1.80 × 10-23 J. (a). What i...

Q: Helium gas is in a cylinder that has rigid walls. If

Helium gas is in a cylinder that has rigid walls. If the pressure of the gas is 2.00 atm, then the root-mean-square speed of the helium atoms is vrms = 176 m/s. By how much (in atmospheres) must the p...