The correct option is A.
Speed is the ratio of the distance an object moves from a reference point to the amount of time it takes to travel the distance.
For a fixed distance, if the time required to travel the distance is less than the speed is high. However, if time to cover the same amount of distance is more than the speed is low. Therefore, the measurement of speed distance and time has an inverse relationship.
Answer:
i think i had the same question as you, I put "A car driving on a straight freeway at 60 miles per hour" which was correct for me.
Explanation:
Answer: There are 
atoms of hydrogen are present in 40g of urea, 
.
Explanation:
Given: Mass of urea = 40 g
Number of moles is the mass of substance divided by its molar mass.
First, moles of urea (molar mass = 60 g/mol) are calculated as follows.
According to the mole concept, 1 mole of every substance contains 
atoms.
So, the number of atoms present in 0.67 moles are as follows.
In a molecule of urea there are 4 hydrogen atoms. Hence, number of hydrogen atoms present in 40 g of urea is as follows.
Thus, we can conclude that there are atoms of hydrogen are present in 40g of urea, .
To go from grams to atoms, you first have to convert to moles and them to atoms. To do that, divide the amount in grams by the atomic weight (141.95 in this case) and then multiply by avagadros number (6.022×10^23). After you do all of this, you should get 8.06×10^20.
The statement a) it orbits around the nucleus of an atom. does not describe a proton.
- Protons is known as nucleon and Is found in the nucleus. It doesn't revolve around nucleus of atom.In circular orbits, electrons move around the nucleus.
- In his well-known gold foil experiment from 1911, Ernest Rutherford made the discovery of the atom's nucleus.
- He came to the conclusion that the majority of an atom's volume was empty and that all of the positively charged particles in it were concentrated in a single core.
- The mass of a proton is around 1835 times that of an electron.
- The atomic number is the quantity of protons in an element's nucleus.
- The mass of a proton is 1.6726219 × 10^-27 kilograms.
Proton is embedded inside the nucleus of atom along with neutron and electron revolve around the nucleus in fixed orbit.
Learn more about proton here: brainly.com/question/28023882
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