A priest is in a rested motorcar, with a mass of 780 kg, at the top of a slope of 80%. When he releases the brakes of the motorcar, it moves freely down for 25m due to
gravitational force to the bottom of the slope and then immediately onto a horizontal road
till it comes to rest at the bottom of the slope.
Calculate the following:

1.1 The velocity of the motorcar at the bottom of the slope​
1.2 The declaration of the motor at the bottom of the slope
1.3 what is the kinetic energy of the motorcar atfer 12 seconds on the horizontal road

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =