Answer: buzzer.

The working principle of a buzzer is the conversion of electrical energy to sound energy.

The switch just cuts or permits the flow of current, the motor convertes electrical or other kind of energy into mechanical energy, a bulb converts electrical energy into light and a battery converts chemical energy into electrical energy.

4 0

3 years ago

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The record time for a Tour de France cyclist to ascend the 1100-m-high Alpe d'Huez is 37.5 min. The rider and his bike had a mas

Leni [432]

Answer

given,

height of Alpe d'Huez = 1100-m

time = 37.5 min

mass of the rider and his bike = 65 Kg

the metabolic power to ride = 700 W

U = m g y

U = 65 x 9.8 x 1100

U = 700700 J

since efficiency is 25%

$E_{chem} = \dfrac{U}{e}$

$E_{chem} = \dfrac{700700}{0.25}$

$E_{chem} = 2802800$

$E_{chem} = \dfrac{2802800}{4.19 \time 10^3}$

$E_{chem} =668.9\ cal$

b) $P = \dfrac{E_{chem}}{t}$

$P = \dfrac{2802800}{37.5\times 60\ s}$

P = 1245.68 W

8 0

3 years ago

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This experiment deals with the relationship between volume and temperature for a fixed amount of gas at constant pressure. Desig

creativ13 [48]

Your experiment should keep one thing constant and measure the other. So vary the temp and measure the pressure. You will get a set of data that relates pressure with temp.
<span>PV = nRT
So
P and T are directly proportional.
</span>These experiments are one of either Boyle-Mariottte's, Gay-Lussac'a or Charles' law.

8 0

3 years ago

A normal blood pressure reading is less than 120/80 where both numbers are gauge pressures measured in millimeters of mercury (m

KIM [24]

The pressure value is given by the equation,

$P= \rho gh$