Total distance traveled = 1,223 miles
For a speed of 460 mph and for 75 minutes, distance traveled = 460*75/60 = 575 miles
Distance remaining = 1223-575 = 648 miles
Time taken at 439 mph to cover this distance = 648/439 = 1.476 hours ≈ 88.56 minutes
Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
Answer:
Explanation:
Atomic mass of hydrogen is 1 . so 1 g of hydrogen will have 6.02 x 10²³ atoms
3 g of hydrogen will have 3 x 6.02 x 10²³ atoms . This will give 3 x 6.02 x 10²³ protons and same number of electrons
So number of protons at north pole = 3 x 6.02 x 10²³
charge on these protons = 1.6 x 10⁻¹⁹ x 3 x 6.02 x 10²³ C
= 28.9 x 10⁴ C
similarly total charge on electrons at south pole = 28.9 x 10⁴ C
distance between them = diameter of the earth = 2 x 6356 x 10³ m
= 12712 x 10³ m
Attractive force between these charges
= k q₁q₂ / r² , q₁ ,q₂ are charges and r is distance between charges.
= 9 x 10⁹ x (28.9 x 10⁴)² / (12712 x 10³ )²
= 4.6517 x 10⁻⁵ x 10¹¹
= 4.6517 x 10⁶ N
A. They have negative feelings about the skateboarders. -apex
A pallet of 500 sheets for $3,500 is the correct answer
