.) At the average density of the interstellar medium, 1 atom per
cm3, how big a...
.) At the average density of the interstellar medium, 1 atom per
cm3, how big a volume of material must be used to make a star with
the mass of the Sun? What is the radius of a sphere this size?
Express your answer in light-years.
In outer space the density of matter is extremely low, about one
atom per cm3. The matter is mainly hydrogen atoms (m = 1.67 × 10-27
kg) whose rms speed is 260 m/s. A cubical box, 1.70 m on a side, is
placed in outer space, and the hydrogen atoms are allowed to enter.
(a) What is the magnitude of the force that the atoms exert on one
wall of the box? (b) Determine the pressure that the atoms exert....
The density of a certain metal is 3.594 g/cm3 and the metal atom
radius is 217.3 pm. If the metal crystallizes in a body-centered
cubic structure, which choice is closest to the atomic mass?
(a) 136.8 g/mol
(b) 273.5 g/mol
(c) 164.2 g/mol
(d) 184.9 g/mol
(e) 181.1 g/mol
The energy density of starlight in interstellar space is 10–15
J/m3. If the average wavelength of starlight is 500 nm, what is the
corresponding density of photons per cubic meter of space?
(photons/m3)
If you add a 1 cm3 (1 ml) cube of salt (density 2.16
g/cm3) to 10 ml of water (1 g/cm3) what is a
reasonable total volume?
If you add a 1 cm3 (1 ml) cube of salt (density 2.16
g/cm3) to 10 ml of water (1 g/cm3) what is a
reasonable final density?
If you add a 1 cm3 (1 ml) cube of salt (density 2.16
g/cm3) to 10 ml of water (1 g/cm3) what is a
reasonable final...
The average density of planet earth is 5.52 g/cm3. Knowing that
Earth has a mass of 5.97*10^27g, determine the earth radius in
miles. ( 1 mile = 1609 meters).
1. Calculate the approximate density of nuclear matter in g/cm3
. What would be the diameter of a neutron star with the mass of two
solar mass (2M)?
2. Calculate the binding energy of the last neutron in 4He and
the last proton in 16O. What does this tell you about the stability
of 4He relative to 3He, and of 16O relative to 15N?
Question:1
Calculate the density, in g/cm3, of a metal that has
a volume of 41.3 L and a mass of 70.05 kg.
Question:2
You have 20.0 L of a 8.18% by volume (% v/v), water-based dye
solution. Calculate the volume of pure dye and water that were used
to prepare the solution. You may assume that volumes are
additive.
Question:3
How many mL of pure (100.0%) food dye are needed to prepare
437.4 mL of 34.8% by volume (%v/v) food...
Liquid 1: Water (density: 1g/cm3)
Water displaced = 156 mL
mass of object was found to be 156 g
Liquid 2: Saltwater (density: 1.02 g/cm3)
water displaced: 158.4 mL
Mass of object was found to be 161.568 g
Use what you know about Archimedes’ Principle: specifically the
equations and , where the wsubscript refers to
the liquid the object floats on and the o subscript refers
to the object itself. Derive a formula that relates the densities
of the object and...