TutorMe homepage

SIGN IN

Start Free Trial

Frank H.

TUTOR ALL MATH FOR HIGH SCHOOL AND 2 YEAR OF COLLEGE

Tutor Satisfaction Guarantee

Spanish

TutorMe

Question:

Can anyone explain to me the difference between Ser and Estar?

Frank H.

Answer:

Both ser and estar are translated as to be (you probably knew that) I'll make some questions: Who ARE you? i AM a 21 years old guy What ARE you? i AM a doctor Where ARE you? i AM at school How ARE you? i AM sad. In Spanish: Quien ERES tu? yo SOY un chico de 21 años Que ERES tu? yo SOY un doctor Donde ESTAS tu? yo ESTOY en la escuela Como ESTAS tu? yo ESTOY triste As you can see in English it's the same.... In Spanish it's quite diferent for WHO/WHAT questions/answers we use SER for WHERE/HOW questions/answers we use Estar

Calculus

TutorMe

Question:

Worked solution to differentiation of: (e^x - e^-x)/(e^x + e^-x)

Frank H.

Answer:

You need to use the quotient rule: {f/g}' = {g*f' - f*g'}/g^2 In your case, f =(e^x - e^-x), g = (e^x + e^-x) {f/g}' =[(e^x + e^-x)*(e^x - e^-x)' - (e^x - e^-x)*(e^x + e^-x)']/(e^x + e^-x)^2 {f/g}' =[(e^x + e^-x)*(e^x - e ^-x(−1)) - (e^x - e^-x)*(e^x + e ^-x(−1))]/(e^x + e^-x)^2 {f/g}' =[(e^x + e^-x)*(e^x + e^-x) - (e^x - e^-x)*(e^x - e^-x)]/(e^x + e^-x)^2 {f/g}' = [(e^x + e^-x)^2 - (e^x - e^-x)^2]/(e^x + e^-x)^2 Multiply out [(e^2x + 2e^x*e^-x + e^-2x) - (e^2x -2e^x*e^-x +e^-2x)]/(e^x + e^-x)^2 (e^2x + 2e^x*e^-x + e^-2x - e^2x + 2e^x*e^-x - e^-2x)/(e^x + e^-x)^2 {f/g}' = 4e^x*e^-x /(e^x + e^-x)^2 Solution is {f/g}' = 4/(e^x + e^-x)^2

Physics

TutorMe

Question:

Pat accidentally drops his cell phone (0.25kg) out of a window 10m above the ground.?

Frank H.

Answer:

Strangely you need a spherical phone for this to work out. If a normal phone hits the trampoline one edge hits first and a fair bit of energy goes into spinning the phone. But don't take my word for it. Throw your phone onto a trampoline from 10 m and see how many times it comes straight back to you and how many times it fires off at some weird angle. If all the energy goes into the trampoline then kinetic energy -> potential ( spring) energy m g h = 1/2 k x^2 2mgh / k = x^2 x = sqrt( 2mgh / k ) = sqrt(2* 0.25 * 9.8 * 10 / 500) = 0.31 m approx.

Send a message explaining your

needs and Frank will reply soon.

needs and Frank will reply soon.

Contact Frank

Ready now? Request a lesson.

Start Session

FAQs

What is a lesson?

A lesson is virtual lesson space on our platform where you and a tutor can communicate.
You'll have the option to communicate using video/audio as well as text chat.
You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.

How do I begin a lesson?

If the tutor is currently online, you can click the "Start Session" button above.
If they are offline, you can always send them a message to schedule a lesson.

Who are TutorMe tutors?

Many of our tutors are current college students or recent graduates of top-tier universities
like MIT, Harvard and USC.
TutorMe has thousands of top-quality tutors available to work with you.

Made in California

© 2019 TutorMe.com, Inc.