QUESTIONS Lab Determine the work and the power developed when we walk up the stairs. Will...

QUESTIONS Lab Determine the work and the power developed when we walk up the stairs.

Will the work increase, decrease or stay the same if we increase the number of steps in the stairs? Please explain.
Will the work increase, decrease, or stay the same if the student carries heavy boxes
What can you tell about the energy the student has before and after walking up the stairs? Is it increased, decreased, or stays the same? If the energy changes, can you tell by how much is the minimum change?
Will the work performed increase, decrease, or stay the same if the student runs instead of walking up the stairs? Please explain.
What will happen to the power developed if the student runs instead of walking up the stairs? Will the power increase, decrease, or stay the same?

Expert Solution

Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The change in the energy can be expressed for a mass m and height difference as

(a) If you increase the number of steps in the stairs, the work done by you will be the change in gravitational potential energy. It will increases as the value of h increases.

(b) if the student carries heavy boxes, the change in gravitational potential energy increases as the value of m increases.

(c) The energy the student after walking up the stairs is equal as before if you consider there is no loss of energy. Because the student did some work which will converted to the gravitational potential energy according to conservation of mechanical energy.

The minimum change in energy will be the change of potential energy = mgh.

(d) The work performed stay the same if the student runs instead of walking up the stairs. Now the kinetic energy will convert to the gravitational potential energy according to conservation of mechanical energy.

(e) The power (P) is expressed by the equation as

The student climb a fixed height by running or by walking. Therefore, the power is inversely proportional to time. The time required during running is less than walking. Therefore, the power increases if the student runs instead of walking up the stairs.

genius_generous answered 8 months ago

When we are studying capital budgeting, we go through a lot of work to come up...

When we are studying capital budgeting, we go through a lot of work to come up with an investment decision. However, we have made many assumptions along the way to form what seems like a value-maximizing decision. Choose an assumption that we make and discuss the risks associated with that assumption.

We conducted a lab in which we had to determine the molecular weight of a volatile...

We conducted a lab in which we had to determine the molecular weight of a volatile liquid. My professor wants us to explain why Graham's Law of Effusion works for this procedure? The experiment consisted of us heat up a test tube with a volatile liquid. The lid of the test tube was covered in tin foil with a pin hole to allow for the gas to escape. Please don't just define Graham's Law. Tell me why it works here.

Carefully work through the sample calculations for this lab ON PAPER. Then, set up the same...

Carefully work through the sample calculations for this lab ON PAPER. Then, set up the same equations on a separate sheet of paper, but replace the values in the ‘Sample Calculations’ folder with the ones provided below and complete the calculations: Mass of Zinc = 0.0928 g H2 volume reading from the eudiometer tube = 35.98 mL Water bath temperature = 19.9 °C Barometric pressure = 768.2 mm Hg Level (pressure) difference from the meter stick = 41.20 cm H2O...

What does it mean when we say an interface is 'Up-Up'?

1. When reaction mass was added in the lab, the rocket went higher, up to a...

1. When reaction mass was added in the lab, the rocket went higher, up to a point. But if there is less compressed air space, there is less total energy, e.g. with 400 ml there is air energy to LIFT the rocket to 203 feet. Explain. (Hint, what is heavier, water or air? Does mass stay constant?) 2. FINALLY, when you hold your thumb over the end of a garden hose, the jet goes farther. Based on what you learned...

In this lab, we will titrate NaOH into Binegar (acetic acid) to determine its concentration. These...

In this lab, we will titrate NaOH into Binegar (acetic acid) to determine its concentration. These are the principle questions: - What is the reaction that occurs in this titration? - What does a titration measure, and how does it measure this quantity? - What is a titration curve? How would it differ for diprotic of triprotic acids? - What is an equivalence point? - How do you select an indicator?

I am working on a lab practical write up in which we have to measure the...

I am working on a lab practical write up in which we have to measure the acceleration due to gravity by observing carts rolling down an incline. I have to plot a scatter plot and use a program with Linear Least Squares Fit to calculate the gradient of the graph and uncertainty for this value. This program works but I don't know how to combine the uncertainty given for the Linear Fit with the uncertainties associated with my input x...

Heat of Vaporization Questions We did a lab where we placed a graduated cylinder upside down...

Heat of Vaporization Questions We did a lab where we placed a graduated cylinder upside down in a beaker to observe the air bubble and how it was affected by temperature. There are a few questions I need help with: 1. You have assumed the vapor pressure of water below 5 degrees Celsius to be negligible. How would the inclusion of its actual vapor pressure affect your results? 2. Assume the graph of ln(P) versus 1/T results in a curved...

Very short answer questions: The IR Detector that we tested in the lab was essentially a...

Very short answer questions: The IR Detector that we tested in the lab was essentially a photo diode. What quantity was the light (from the infra-red source) converted into. Is this the same as a pn-junction diode? Sketch the I-V characteristics of the photodiode. Derive the gain expression for a non-inverting amplifier setup and for an inverting amplifier setup. Both 741 and 311 can be used as a comparator. Which one is better? Justify by explaining their output voltage waveforms....

When we experiment, we always want to think about sources of experimental uncertainty. In the lab...

When we experiment, we always want to think about sources of experimental uncertainty. In the lab "Measurement and Uncertainty" you learned about random errors and systematic errors. Let's think about some potential sources of uncertainty in this experiment. If the uncertainty is random, fill in R. If it is systematic, fill in S. In every trial, a student holds the picket fence so that it is tilted slightly to the left as it drops through the photogate. In the course...

Question