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3 years ago

Calculate mass of the apple

Physics

1 answer:

Naya [18.7K]3 years ago

5 0

Answer:

m = 0.20g

Explanation:

m = GPE / g x h

m = 6 / 9.81 x 3

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Calculate the standard emf of a cell that uses the Mg/Mg2+ and Cu/Cu2+ half-cell reaction at 25°C. E o = V Write the equation fo

Alina [70]

Answer with Explanation:

We have to calculate the standard emf of a cell.

Consider $E^0_{Mg/Mg+2}=-2.37 v$

$E^0_{Cu/Cu+2}=0.34 V$

T= $25^{\circ}=25+273=298 K$

Anode half reaction: $Mg(s)\rightarrow Mg+2(aq)^+2e-$

Cathode half reaction: $Cu+2(aq)+2e-\rightarrow Cu(s)$

Overall reaction of cell :

$Mg(s)+Cu+2(aq)\rightarrow Mg+2(aq)+Cu(s)$

Cathode :The electrode which gains electrons.

Anode: The electrode which losses electrons.

We know that standard emf of the cell

$E^0_{cell}=E_{cathod}-E_{Anode}$

$E^0_{cell}=0.34+2.37=2.71 V$

Hence, the standard emf of a cell=2.71 V

6 0

4 years ago

What is the climate of Central America?<br>hot<br>tropical<br>temperate<br>arctic

shtirl [24]

the answer is temperate

6 0

3 years ago

A cat runs and jumps from one roof top to another which is 7.22 meters away and 5.97 meters below. Calculate the minimum horizon

liraira [26]

Height of one roof is 5.97 m below the other roof

now its displacement in vertical direction is given as

$y = v_i t + \frac{1}{2} at^2$

$5.97 = 0 + \frac{1}{2}\times 9.8 (t^2)$

solving above for time

$t = 1.10 s$

now in the same time cat has to cover the distance between two buildings

so here we can say

$d = v_x \times t$

$7.22 = v_x \times 1.10$

solving above for speed

$v_x = 6.54 m/s$

so speed of cat is 6.54 m/s

8 0

4 years ago

The speed of the cart after 3 seconds of Low fan speed is

jonny [76]

The speed of the cart after 3 seconds of Low fan speed is (2) cm/s. This is further explained below.

<h3>What is speed?</h3>

Generally, speed is simply defined as the rapidity of movement or efficiency of operation.

In conclusion, After 8 seconds with the fan set at Low, the cart will have traveled 1 cm/s. After three seconds at medium fan speed, the cart travels at a velocity of two centimeters per second.