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What causes or reduces resistance in a material?

Resistance can be thought of as the amount of distruption to the flow of electrons. If we look at the equation for resitivity:R=kl/A,where k is the resistivity of the material (and is dependant on the mat...

Answered by Daniel G. Physics tutor
1279 Views

16cos30° - 5tan60° = √x. Find the value of x.

Split up the two terms: cos30° = (1/2)√3 and tan60° = √3 (from memorised values of cos and tan)Therefore 16cos30° = 8√3 and 5tan60° = 5√3 8√3 - 5√3 = 3√3 = √9 x √3 = √27x=27

Answered by David G. Maths tutor
2442 Views

Raúl sent an e-mail to his friend Silvia with some tips for her trip to London. Unfortunately, the email had some problems when sent and consequently, some words disappeared. Help Silvia understanding the tips for her trip by completing the missing words.

Querida amiga: Estoy muy contento (adjetive) de que hayas decidido visitar la ciudad de Londres. El tiempo por aquí es bastante lluvioso (weather condition), pero cuando ...

Answered by Carolina V. Spanish tutor
1340 Views

largior ... dicunt (lines 1–5): how does Virgil present Elysium as an attractive and appealing place? Make three points, each referring to the Latin.

The use of the comparative adjective 'largior' to describe 'aether' creates a vivid description of the vast expanse of sky. The comparative heightens the scale of this place, showing that Elysium is not o...

Answered by Olivia B. Latin tutor
1143 Views

A particle is projected from the top of a cliff, 20m above the sea level at an angle of 30 degrees above the horizontal at 20m/s. At what vertical speed does it hit the water?

Using SUVAT equations:s = -20mu = 20sin(30) = 10m/sv = ?a = -9.8m/s^2t = ?v^2 = u^2 + 2asv = sqrt(100 + 40x9.8)= 22.2m/s

Answered by Adam R. Further Mathematics tutor
1798 Views

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