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Physical Science Data Science

06/24/25

pivot_wider() in {tidyverse}

I have a project where I need to restructure my dataframes. I am using pivot_wider but I cannot produce what I need. I need more columns to appear in the output (nut_w). Happy to hire a tutor is... more

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Physical Science Physics Sat Math Electrical Engineering

02/20/25

Use junction rule and loop rule.

Here is the link to the question: https://ibb.co/fzm7920d Would you please be able to make a video on it since I have no idea how these currents flow and how to use the junction and loop rule... more

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Physical Science Astronomy Geology

02/06/25

What is the difference between a solar and lunar eclipse?

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Answers •2

Physical Science Math Physics Electrical Engineering

01/26/25

Find the total electric flux through the cylinder.

A uniformly charged, straight filament 7.10 m in length has a total positive charge of 2.00 µC. An uncharged cardboard cylinder 4.30 cm in length and 10.0 cm in radius surrounds the filament at its... more

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Physical Science Physics Psat Ssat

12/10/24

What is the difference between speed and velocity.

Speed only measures how fast an object is moving regardless of its direction.Example: We can say a boat is moving with an average speed of 50 miles/hr.Because speed only cares about the magnitude... more

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Physical Science Science Chemistry

11/06/24

Hess' Law & Calorimetry

If 3.000 g of iron metal are reacted in a calorimeter with a heat capacity of 350.0 J/°C, what would be the final temperature of the calorimeter if its initial temperature were 20.0°C?

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Physical Science

10/11/24

What is the difference between terrestrial and Jovian planets

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Physical Science Chemistry Physics

09/28/24

Introduction to Spectrochemical Methods

Convert the accompanying transmittance data toabsorbances.*(a) 27.2%

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Physical Science Chemistry Physics

09/28/24

Introduction to Spectrochemical Methods

Calculate the wavelength and the energy in joules associated with a signal at 220 MHz.

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Physical Science Science

08/06/24

What are four methods that can be used to address Hazardous Algae Blooms (HABs)?

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Answers •2

Physical Science Science

08/06/24

What is eutrophication?

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Answers •1

Physical Science

06/29/24

How to calculate how much base to add to a solution get a desired pH

If a 1.0L solution has an initial pH of 6.70 how much KOH do i need to add to get a desired pH of 6.80?The solution will react 1:1 with the KOH: H+ + OH- --> H2O

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Physical Science Chemistry Physics Chemical Engineering

05/13/24

Thermodynamics problem

We solved this task in the class, but I don't understand it. I would be very happy if someone could explain it in general terms. I can write the basic equations for the adiabatic change of state,... more

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Physical Science Chemistry Physics Chemical Engineering

05/13/24

Thermodynamics problem

We solved this task in the class, but I don't understand it. I would be very happy if someone could explain it in general terms. I can write the basic equations for the adiabatic change of state,... more

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Answers •1

Physical Science

05/03/24

physics of matter

An empty storage tank has a volume of 1,190 ft3. What is the buoyant force exerted on it by the air? (Assume the air is at 0°C and 1 atm.)

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Physical Science

04/25/24

Can you explain the difference between solar and lunar eclipses?

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Physical Science Math Science Physics

04/15/24

Doppler-effect problem

Please help.I found this interesting problem on the internet, but I don't know how to start it:These are the questions:At what frequency do astronauts hear the hum?What frequency should the radio... more

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Physical Science Math Physics Sat Math

03/25/24

What is the magnitude of the induced emf (in V) in the loop 1.00 s after it begins to move?

Can anyone help me with letter D? I keep getting the wrong answer. Here's the link to the picture of the full question. https://ibb.co/7WymLCZ

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Physical Science Math Science Physics

03/17/24

Please help with this magnet physics problem

On the internet, I came across an interesting physics problem. Can you help with this:The weight of a small, flat refrigerator magnet is "M". We place the magnet on the refrigerator's vertical... more

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Physical Science Science Biology Ecology

03/16/24

Why do we assume that oxygen was not present in the original atmosphere?

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Answers •2

Physical Science Math Science Physics

03/16/24

Please help with this magnet physics problem

On the internet, I came across an interesting physics problem. Can you help with this:The weight of a small, flat refrigerator magnet is "M". We place the magnet on the refrigerator's vertical... more

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Answers •1

Physical Science Math Science Physics

03/14/24

Coaxial cable-physics problem

Please help with this problem.Problem:Power P is transmitted over a distance D on a coaxial cable. The radius of the cable's inner conductor with negligible resistance is Ri, and the radius of the... more

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Physical Science Math Physics Electrical Engineering

03/02/24

Movement of charged particles in a magnetic field-physics problem

I found this interesting physics problem on the internet:An electron-positron pair is created from a photon with an energy of 2 MeV passing by a nucleus with a high atomic number. In the Wilson... more

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Physical Science Math Physics Mechanical Engineering

02/15/24

Please help- heat conduction and Newton's law of cooling

Criterion: The heat transfer coefficient is the same for the freezer and the refrigerator.Two bowls of the same size are filled with room-temperature coffee and then placed one in the freezer and... more

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Physical Science

02/07/24

find the acceleration rate if the force is 200N and the mass object is 150kg

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Answers •1

pivot_wider() in {tidyverse}

Use junction rule and loop rule.

What is the difference between a solar and lunar eclipse?

Find the total electric flux through the cylinder.

What is the difference between speed and velocity.

Hess' Law & Calorimetry

What is the difference between terrestrial and Jovian planets

Introduction to Spectrochemical Methods

Introduction to Spectrochemical Methods

What are four methods that can be used to address Hazardous Algae Blooms (HABs)?

What is eutrophication?

How to calculate how much base to add to a solution get a desired pH

Thermodynamics problem

Thermodynamics problem

physics of matter

Can you explain the difference between solar and lunar eclipses?

Doppler-effect problem

What is the magnitude of the induced emf (in V) in the loop 1.00 s after it begins to move?

Please help with this magnet physics problem

Why do we assume that oxygen was not present in the original atmosphere?

Please help with this magnet physics problem

Coaxial cable-physics problem

Movement of charged particles in a magnetic field-physics problem

Please help- heat conduction and Newton's law of cooling

find the acceleration rate if the force is 200N and the mass object is 150kg

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