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"Los jóvenes pasan demasiado tiempo en las redes sociales." Estás de acuerdo? Explica tus razones.

El mundo ha cambiado muchísimo en los últimos diez años. Las redes sociales casi no existían hace diez años y han tenido un impacto profundo en nuestro estilo de vida. Ahora hablamos más en internet que cara...
HB
Answered by Harry B. • Spanish tutor
5129 Views

Why doesn't the magnetic force change the velocity of a particle?

Well actually, it does. Remember that the velocity is a vector and so is the force. Since F=ma, the acceleration due to a given force points in the same direction as the force itself. The magnetic force is p...
AS
Answered by Ana S. • Physics tutor
4405 Views

Solve the simultaneous equations x^2 + y^2 = 9 and x+ y = 2. Give your answer to 2.d.p

Label your two equations 1 and 2 respectively. Make x the subject of the second equation, so x=2-y. Substitute x=2-y into x^2+y^2=9, to give (2-y)^2+y^2=9. Expand the brackets using FOIL to give 4-4y+y^2+y^2...
GS
Answered by Georgia S. • Maths tutor
33568 Views

Solve the following quadratic equation: x^2 + 3x + 2 = 0

Step 1: Find factors of the constant (The number with no x attached to it), In our case this is 2. The factors of 2 are: 1 & 2 and -1 & -2. Step 2: The sum of the factors from step 1 must equal the n...
JS
Answered by Jack S. • Maths tutor
4967 Views

Discuss how X-rays and Ultrasound can be used for medical purposes, including their advantages and disadvantages.

Uses for x-rays: Detecting broken bones, Cancer treatment, CT scans._ Uses for Ultrasound: Pre-natal scanning, Destruction of kidney stones/plaque on teeth, Internal imaging of body parts._ Advantages of X-r...
IF
Answered by Isaac F. • Physics tutor
10481 Views