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An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a concave spherical mirror having a radius of curvature of 22.0 cm. (a) Draw a principal-ray diagram showing the formation of the image. (b) Determine the position, size, orientation, and nature (real or virtual) of the image.
A pencil that is 9.0 cm long is held perpendicular to the surface of a plane mirror with the tip of the pencil lead 12.0 cm from the mirror surface and the end of the eraser 21.0 cm from the mirror surface. What is the length of the image of the pencil that is formed by the mirror? Which end of the image is closer to the mirror surface: the tip of the lead or the end of the eraser?
Carbon dioxide flows steadily at 1 kg/s through a device where the pressure, specific volume, and velocity of the gas are tripled according pVn = C. The inlet conditions are p1 = 200 kPa, v1 = 0.4 m3/kg, and v1 = 100 m/s. Determine (a) n; (b) the initial and final temperatures; (c) the change of enthalpy; (d) the power; (e) the heat.
A person wanted to have a warm bath at 40°c and placed 5.0kg of water in a basin at 85°c. What mass of cold water at 25°c must be added to the hot water to obtain the choice of bath. Neglecte heat losses and take specific heat capacity of water as 4200J/ kg/ k
What is the density of water when:
The weight of an empty cylinder was 50 g, 20 mL of water was placed in the graduated cylinder, and the weight of the cylinder and water was 70 g.
Density is a measure of the mass per unit of volume for a material. Mathematically, this can be expressed in units of kg/m3. Given that the equation for the volume of sphere is based on radius, the density of Earth is ___x103 kg/m3
Question 2 options:
Given the value for the universal gravitational constant, the average value for the acceleration due to gravity at the surface of Earth, and the radius of Earth, Earth’s mass is ____x1024kg.
The mass of each lead ball in Cavendish’s experiment was 195 kg. Given the value of G, the magnitude of the expected force of attraction between two of these balls if their centres were separated by 1.0400 m is ___x10-6 N.
Two thermometers in degrees Celsius and degrees Fahrenheit are both immersed in a fluid. If the reading in degrees Fahrenheit is thrice that of the degrees Celsius reading, what is the equivalent reading in degrees Rankine?
A river flows due south with a
speed of A man steers a motorboat across the river; his
velocity relative to the water is due east. The river is 800 m
wide. (a) What is his velocity (magnitude and direction) relative to
the earth? (b) How much time is required to cross the river?
(c) How far south of his starting point will he reach the opposite
bank?
