A heavy object falls with the acceleration as a light object during free fall. Why?
Answers
A heavy object falls with the acceleration as a light object during free fall because of acceleration due to gravity.
Explanation:
A motion can be termed as free fall when the object is completely under the influence of gravity. So in this case, no other force will be acting on the object other than the gravitational force. As the gravity influences the object in free fall, the acceleration attained by any object in free fall is same. And this acceleration is termed as acceleration due to gravity. Since, the gravity gives the acceleration to every object experiencing free fall, then the acceleration should be constant. Thus, a heavy object and a light object will have same acceleration during free fall.
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Warm blooded or cold blooded Animals are warm when their surroundings are warm and cool when their surroundings
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What are cirrus.cirrostratus. And cirrocumulus clouds made up of
Gas pressure within a fixed container will increase when _____.1) gas is cooled2) gas is heated4) gas volume changes5) mass of a gas is increased
Answers
Answer:
The acceleration of this helicopter is
Explanation:
In this question the velocity changes from 30 m/sto 40 m/s in 5 seconds.
Initial velocity u=
Final velocity u=
Time t=
Acceleration is defined as the rate of change of velocity. It is given by the equation
=
=
=
All moving bodies aren’t necessarily accelerated. To be identified as accelerating, a body should have its velocity changing. Thus a body in uniform motion is not accelerating since its velocity is constant.
Answer:
A helicopter’s speed increases from 30 m/s to 40 m/s in 5 seconds.
What is the acceleration of this helicopter?
2
m/s2
Explanation:
Correct on egde
Answers
The dog whistle is manipulating frequency. This is further explained below. Option B is correct.
What is a high-pitched noise?
The sound of a high-pitched sound is harsh and has a high pitch. Examples are:
- On the blackboard.
- The school bell rings.
- Whistle.
- The sound of rubber sneakers squeaking on a basketball court.
In conclusion, for a high pitch, we alter the frequency.
Read more about frequency
Answer:
Frequency
Explanation:
(I believe don't count me on this) Amplitude is the wave height otherwise known as how loud it is or the maximum displacement of vibrating particles
Answers
Answer:
2019?
Explanation:
Answer:
6.7 N
Explanation:
The force exerted by the 4.0 kg block on the 5.0 kg block will be 6.7
Fnet = 16 N (since it is applied only to the 3.0 kg block)
Total mass of the system, m = 3.0 kg + 4.0 kg + 5.0 kg = 12.0 kg
Fnet = ma16 = 12aSolving for a,a = 16/12 = 4/3 m/s²
m is the mass of the 5.0 kg block and a is the acceleration of the system.F = 5.0 kg x 4/3 m/s² = 6.666 N
Therefore, the force exerted by the 4.0 kg block on the 5.0 kg block is 6.7 N.
3. How does an atom differ from a molecule?
4. How do protons, neutrons, and electrons differ?
5. The element lithium (Li) has 3 protons and 3 electrons. The element fluorine (F) has 9 protons and 9 electrons. An atom of the element lithium (Li) transfers an electron to an atom of the element fluorine (F). Which type of bond results between the atoms, and what happens to the charges in each of the atoms?
6. Why do the minerals graphite and diamond look different even though they’re made from the same element, carbon (C)?
Answers
Answer:
Explanation:
Answer:
Explanation:
1. Atomic mass of silver:
Atomic mass of an atom is the sum of all the subatomic particles: protons, neutrons and electrons in the atom.
We know that electrons have very negligible mass and the bulk of the mass of an atom is concentrated in the small nucleus which contains protons and neutrons.
Therefore, we can calculate the atomic mass of such element such as Silver by adding the number of Protons and Neutrons together.
Atomic mass = Proton + Neutron
2. Number of electrons = 17
Number of protons = 17
If this atom of chlorine gains an electron more, the number of protons increases by 1 and we then have 18 electrons.
For this atom, it becomes negatively charged as the number of electrons is now greater than that of protons by 1.
3. An atom is the smallest unit of matter that can take part in chemical reaction e.g Na, K etc.
A molecule is a chemical combination of atoms.
Atoms - - - - molecules - - - - matter
4. Protons are positively charged particles in an atom
Neutrons are neutrally charged ie 0 charge
Electrons are negatively charged particles on an atom.
5. We have two elements:
Lithium and fluorine
For chemical combination to occur, there must be gain or loss of electron in such a way that the atom mimics group 8 elements.
Lithium has a configuration of 2,1
It has a valency of 1
The loss of one electron in its outermost shell makes it looks like an helium atom, a noble gas.
Flouirne has a configuration of 2,7
It would require an electron to complete its octet.
The combination Li and F would result into a loss of an electron by Li and it would become psotively charged
Flourine would gain the electron and becomes a posively charged atom.
The compound resulting is LiF: Lithium Fluoride
There is thus a net transfer of electrons. This is an electrovalent bond being created.
6. Graphite and diamond are allotropes of carbon.
Graphite is made up of carbon atoms that are arranged layers on top of one another. They look like sheet.
The carbon atoms on diamond are crosslinked to one another. Each atom bonded to one another in a cubic form.
Answer:
To determine the atomic mass of silver, or any other element, add the number of protons and the number of neutrons together.
If a chlorine atom gains an electron, it will have an unequal number of protons and electrons, which makes it an ion. Because electrons are negatively charged, the ion will be negatively charged, also called an anion.
An atom is the smallest component of an element that retains all of the chemical properties of that element. A molecule is two or more atoms that have bonded together.
Protons and neutrons are found in the nucleus of an atom, while electrons are found in the area surrounding the nucleus of an atom. Protons have a positive charge, electrons have a negative charge, and neutrons have no charge.
Because the lithium atom loses a negatively charged electron, it becomes a positively charged ion, or cation. Because the fluorine gains a negatively charged electron, it becomes a negatively charged ion, or anion. A bond between an anion and a cation is an ionic bond.
Graphite and diamond look different because the carbon atoms bond to one another in different ways in the two minerals. This gives each mineral a unique lattice structure and, as a result, a different physical appearance.
Explanation:
Answers
2 is Constructive Interference
3 is longitudinal
4 is first choice
5 is first choice
b. Phosphorus P4
c. Glucose C6H12O6
d. Sulphur dioxide SO2
e. Ethanol C2H5OH
Answers
B) 15
C) 6 c, 12 h, 6 o
D) o-8
S-16