What is the smallest number of whole logs ( ρρ = 725 kg/m3, radius = 0.80 m, length =

A mass of 81.0g is placed on the end of a 4.5cm vertical spring. This causes the spring to extend to 10.3cm. If we then change the mass to 191.0g, what is the measured length of the spring (in m)?

What is the approximate mass of air in a living room 4.3 m x 3.4 m x 2.8 m? The density of air is 1.29 kg/m³. Express your answer to two significant figures and include the appropriate units. HẢ ? Value Units т

There are three cylindrical vases on the table, none of them is taller than 40 cm. The firstvase can be filled with 2 dl of water, the second one with 3 dl, and the third with more than 6 dl water. The area of the cross section of the first vase is 10 cm^2, the area of the cross section of the other two vases is 20 cm^2. There is the same amount (volume) of water in each vase. It can be observed that if a specific tuning fork is placed just above the vases, its sound is getting louder. The width of the bottom of each vase is 1 cm, the speed of sound in air is 340 m/s, and the frequency of the tuning fork is less than 1 kHz. a) What is the volume of water in the vases? b) What is the frequency of the tuning fork? c) What is the height of the third vase?

You have been given a small rock sample to identify based on its density. Suppose that you use the displacement method to determine the volume of the rock sample to be 95 cm³ . The mass of the sample is 285 g. Which of the following is the most likely composition of this sample? Granite: density = 2650 kg/m³ O Limestone: density = 1978 kg/m³ Iron-Nickel Alloy: density = 9900 kg/m³ Basalt: density = 3000 kg/m³ Granite: density = 2150 kg/m³ Peridotite: density = 3300 kg/m3

mass (g) diameter (cm) height (cm) volume (cm^3) 16.20 1.21 5.30 ? 43.98 1.80 6.41 ? 79.49 2.11 8.49 ? 139.1 2.59 9.69 ? 1. The slope of your line is the density of the material of which your cylinders are made. What is this value, including units? 2. Table 2 contains a list of materials, along with their densities/ Based on your value in Question 1, what is your cylinder material? Material                                                     Density (g/cm^3) maple 0.77 polypropylene 0.90 polystyrene 1.03 polyamide  1.15 acrylic 1.17 polyurethane 1.23 phenolic 1.32 polyvinylchloride 1.37 poly tetrafluoroethylene (teflon) 2.20 aluminum 2.71

An object has density ρoriginal�original. Suppose each of the object's three dimensions is increased by a factor of 2 without changing the object's mass. By what factor will the density change?

the average density of an atom is approximately 103 kg/m3. The nucleus of an atom has a radius about 10-5 times that of the entire atom, and contains nearly all the mass of the atom.  What is the approximate density, in kilograms per cubic meter, of a nucleus?

A weight lifter can bench press 191 kg. How many milligrams (mg) is this? O a) 1.91 × 108 mg b) 1.91 x 10° mg O c) 1.91 × 10’ mg O d) 1.91 × 106 mg

An automobile tire is shown in the figure below. The tire is made of rubber with a uniform density of 1.10 x 103 kg/m3. The tire can be modeled as consisting of two flat sidewalls and a tread region. Each of sidewalls has an inner radius of 16.5 cm and an outer radius of 30.5 cm as shown, and a uniform thickness of 0.620 cm. The tread region can be approximated as having a uniform thickness of 2.50 cm (tha inner radius is 30.5 cm and outer radius is 33.0 cm as shown) and a width of 19.6 cm. What is the moment of inertia (in kg · m2) of the tire about an axis perpendicular to the page through its center? Sidewall 33.0 cm 16.5 cm 30.5 cm Tread kg • m2