Sérgio Fernandes

@Afghan_Engineer Regardless of whether boots or gloves are used, both are at risk. In any work involving electrical systems, the power source must be switched off.

Which one is safer when working with electricity, A or B?

@MonicaM5859 @cazij Caffeine may reverse memory impairment caused by lack of sleep, study suggests. medicine.nus.edu.sg/news/caffeine-…

☕️ #GoodMorning friends #Coffee ?

@MathMath901 Sorry.

@fernandes_s_r y=3/x ( you wrote y=x/3)

#math problem 12-05-2026 Differential Calculus / Analytic Geometry.

@MathGuyTFL No solution !!!

Find the value of K.

@renabaddie_ A, C and D ➡️ acids

Chemistry Trivia Challenge! 🧪 Which chemical formula is a Base?

A, B, C or D? Two batteries of emf 18V and 2 ohm's internal resistance and other emf 12V and 1 ohm's internal resistance, are connected as shown. What will be the voltage V reading by the voltmeter?

@Afghan_Engineer I = 10/(50 + 50 + 150) = 0.04 A

A, B, C or D? Assume that each diode has a forward bias resistance of 50 ohm's and infinite reverse bias resistance as shown. Find the current i through 150 ohm's resistance.

@MathMath901 h ➡️ 30° - a° m➡️ 270° - 2a° m°/h° = 12 (270 - a)/(30 - 2a) = 12 ➡️ a = 9° 270 - 2a = 270 - 18 = 252° 360° ➡️ 60 m ➡️ 252° ➡️ 42 m 5h 42m ✅

#math problem 10-05-2026 Time is the same in a relative way,but you're older.

For #ManholecoverMonday 🕳️ there be Yorkshire water below 😉

@Cmdr_Hadfield Complementing, this is the SLAMMD (Linear Acceleration Mass Measurement Space Device). This device also has applications on Earth, in areas such as physiology, industry... As for quality and technology, there is no doubt, the ISS is a "multi-star" SPA...

Do you gain weight in space? How would you know? Obviously a weigh scale won't work when we're weightless. So we climb on an oscillating spring, and time the change in speed. From that, we can calculate our weight (or 'mass'). After 6 months I stayed the same mass, but lost fat & gained muscle with the healthy diet (no beer or pizza) and daily exercise. The most exclusive of all health spas :) image: @Astro_Cady @nasa

@Afghan_Engineer 20 + 30 = 50 ohms

What's the total resistance between points A and B?

RT @MonicaM5859

@_Do_ityourself That's FAKE. It's impossible to increase pressure without adding energy.

You can create your own water pump with this amazing trick

@H0H0v (h-4)/6 = 2/3 ➡️ h = 8 m

What is the height of the red bar?

The green shaded circle with center at (3,3) is inscribed in a square. Solve for the length of its chord AB.

@PythagorasLab 64 + 16 = 80✅

The rule of BODMAS

@Friyaneb X = 1/2, just taking a look. To clarify, I'm far from being a genius.

Only for genius people ...?

@Cmdr_Hadfield The Spitfire's engine, a true monster of mechanical engineering, V12, 27 liters, and 1700 HP!!