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A new process has been developed that transforms ordinary iron into a kind of super iron called metallic glass. This new product is stronger than steel alloys and is much more corrosion-resistant than steel. However, it has a tendency to become brittle at high temperatures. It is desired to estimate the mean temperature at which it becomes brittle. A random sample of 20 pieces of metallic glass is selected. The temperature at which brittleness is first detected is recorded for each piece. The summary results give a sample mean X of 600 °C and a sample standard deviation s of 15 °C. Find a 90% confidence interval for the mean temperature at which metallic glass becomes brittle.
If you were to build a pipe organ with open-tube pipes spanning the range of human hearing (20 Hz to 20 kHz), what would be the range of the lengths of pipes required
Show that, if the Kelvin thermoelectric effect did not exist (i.e., if τAB were zero), then the voltage produced by a thermocouple would always depend linearly on temperature.
Suppose you throw a rock from an initial height h0 at a speed v0 and angle ? from the horizontal. Neglect drag or friction, Determine the coordinate system and draw a diagram of the trajectory. Draw the free-body diagram and find the net force
Decide what you will test and how you will set-up your experiment include a list of materials you will need and what data you will need to collect.
A car traveling 94 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.84 m. What was the magnitude of the average acceleration of the driver through the collision?
At T = O degrees Celsius and p = 1000mb, 1g of dry air receives during an isochoric process an amount of heat. It is then observed that its pressure increases by 50mb. What is the change of temperature of the air and what is the amount of heat absorb..
a block of mass 3 kg is moved up an incline that makes an angle of 37 with the horizontal under the action of a
neutrons are slightly more massive than protons. if the mass of a neutron were smaller than its actual value yet still
An arrow of mass 20 gram is shot horizontally into a bale of hay, striking the hay with a velocity of 60 m/s. Obtain the average stopping force acting on the arrow
A 200-g mass resting on a horizontal frictionless surface is attached to a spring of spring constant 35 N/m. What is the angular frequency of the oscillations
The goal of Assignment 1 is to critically analyse the Self-Leadership and Positive Psychology literatures and apply them to your chosen career.
A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be cancelled. What current is needed in the solenoid's wires
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