That depends on what planet or moon you're standing on when you drop it.
If you're standing on Earth, the acceleration of the ball is about 9.8 m/s^2 downward.
1) How many valence electrons are in the alkaline earth metal family? Do
they form cations or anions?
A)
1 valence electron, cations
B)
1 valence electron, anions
C)
2 valence electrons, cations
D)
2 valence electrons, anions
Answer:
Below
Explanation:
Alkaline earth metals have 2 valence electrons, which means that when they react with other elements, they will lose rather than gain their 2 electrons making them positive ions or cations.
So the correct answer to your question would be....
C) 2 valence electrons, cations
Hope this helps! Best of luck <3
Determine the weight of an average physical science textbook whose mass is 3.1 kilograms. The
acceleration due to gravity is 9.8m/s2
.
A) 0.32 Newtons C) 6.82 Newtons
B) 3.1 Newtons D) 30.4 Newtons
Answer:
30.38 is the correct answer
Explain an experiment you could run to test the Big Bang theory, including the design and execution, and any observations you can make of the world around you related to the scientific theory. And explain how the observations support of refute the theory!!! Will mark branliest
The big bang theory or great expansion explains the formation of the universe from a point with very high density where matter and space were created, it can be observed in an experiment
The Big Bang theory that can be adapted with some home experiments, specifically the expansion can be measured using an experiment with inflating balloons.
Materials
deflated balloons
marker
thread
measuring tape
Description of the experiment
The stars or galaxies are marked repeatedly with an initial separation and this distance is measured by a thread the length and the thread with a meter, this is used as measured by the fact that the surface is curved.
The balloon is inflated and measurements of the separation are made, observing that as the volume of the balloon increases (time increase) the separation of the galaxies increases
The increase in distance is explained by the Big Bang theory or great expansion.
There is also astronomical evidence:
* The redshift of the hydrogen spectral lines that is explained by the Dopler effect, which is a move away from objects
* Background radiation in the microwave range that comes from everywhere and would be the residue of a large initial explosion.
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What is the velocity of a rocket that
goes 75 km north in 25 seconds?
Answer:
3
Explanation:
v/s
75km/25s
v=3 km/s
What is the correct definition of speed?
A. time (hours or seconds)
B. time per distance (hours per mile or seconds per meter)
C. distance per time (miles per hour or meters per second)
Answer:
C
Explanation:
The correct definition is distance / time, although teachers like to mix you up sometimes. A question like "How many minutes per mile does it take to go 3miles in 20 minutes?" In this question, the units are upside down.
The standard answer is what is the rate of speed when when 3 miles are covered in 2 hours.
Here the answer is 3/2 = 1.5 miles / hour which is the standard way of writing speed or rate. distance / time.
what is force (just trying this app)
Answer: F= force
m=mass of an object
a=acceleration
Explanation: Force is kinda like gravity, but the real noun would be “strength or energy as an attribute of physical action or movement.”
What simple machines combine to make a shovel which is a compound
machine?
A wheel and axle and lever
B. lever and pulley
C. inclined plane and wheel and axle
D. Wedge and lever
do all living cells require glucose for survival
Answer:
All living cells require glucose for survival
let me know if correct
Answer:
hmmmmmmmmmmmmmm
Explanation:
I think so
What is the relation between pressure and area?
Answer:
Pressure is inversely proportional to Area ...
P = F/A
Answer:
Hence, pressure is inversely proportional to the area of contact. Additional information: In the SI unit system, the unit of force is Newton and the unit of area is square-meter. Atmospheric pressure can be defined as the pressure given by the atmosphere of earth near the surface or at sea level.
Compare and Contrast the two main branches of physical science. How are they the same? How are they different?
I=2cm u=12cm o=0.5cm. What is the Focal length? and find u also
Answer:
Focal length is 4 cm
Explanation:
h2 = 2 cm (Erect image)
v = - 12 cm (Erect image)
h1 = 0.5 cm
m = v/u = h2/h1
-12/u = 2/0.5
u = -3 cm
lens formula : 1/v – 1/u = 1/f
1/-12 – 1/-3 = 1/f
(-1 + 4)/12 = 1/f
F = 4 cm
Raising the temperature of a gas will increase its pressure to
volume of the gas would do what
Answer: Boyle found that when the pressure of a gas at a constant temperature is increased, the volume of the gas decreases. When the pressure of a gas is decreased, the volume increases. This relationship between pressure and volume it's called Boyle's law.
Explanation: In the 1600s, Boyle measured the volumes of gases at different pressures. Boyle found that when the pressure of a gas at a constant temperature is increased, the volume of the gas decreases. When the pressure of a gas is decreased, the volume increases. This relationship between pressure and volume it's called Boyle's law.
Convert: 78 mg to cg
Answer:
7.8 cg
Explanation:
7.8 cg
Answer:
7.8
Explanation:
1 cg= 10 mg
divide 78 cg to 10
so your answer will be 7.8 cg
Which terms does velocity describe?
A. speed and momentum
B. gravity and direction
C. speed and direction
Answer:
c
Explanation:
An apple weighing 1 N falls through a distance of 1m. How much work is done
on the apple by the force of gravity?
Answer:
W = F × d
W = 1 × 1
W = 1 Joule
step by step explanation
An apple is having a force of 1 N and it travels to a distance of 1 m then the work done on the apple by the force of gravity will be equal to 1 J.
What is Work?Work is a physics term used to describe the transfer of energy that occurs when an object changes above a distance because of an external force, at least some of which is given in the vector of the dislocation. The element of the strong acting all along the path multiplied by the length of the path can be used to calculate work if the force is constant.
Mathematically, this idea is expressed as W = fd, where W is the effort and f is the force multiplied by d, the distance. Work is completed whenever the pressure is applied at an angle with regard to displacement.
As per the given information in the question,
Force, f = 1 N
Distance, d = 1 m
Then, the work done will be,
W = fd
W = 1 × 1
W = 1 J.
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What phrase describes a scientific law
if you know the time it took an object to travel between two points and the position of the object at the points, can you determine the object's instantaneous velocity
Answer:
Yes
Explanation:
[tex]v = \frac{ds}{dt} \\ where \: we \: need \: to \: know \\ \: change \: in \: displacement \\ \: and \: the \: time \: taken[/tex]
if you know the time it took an object to travel between two points and the position of the object at the points, then we can determine the object's instantaneous velocity by using the differential rate of the displacement function with respect to the time.
Instantaneous velocity = [tex]\frac{dS}{dt}[/tex]
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.
velocity= displacement / time taken
for instantaneous velocity = [tex]\frac{dS}{dt}[/tex]
Thus, If you know how long it took an item to go between two places and where it was when it got there, you can use the differential rate of the displacement function with respect to time to calculate the object's instantaneous velocity.
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(c) What are the factors of work? Also write their relation with work.
Answer:
Explanation:
Appreciation for your work.Good relationships with colleagues.Good work-life balance.Good relationships with superiors.Company's financial stability.Learning and career development.Job security.Attractive fixed salary.Good relationships with colleagues. Good work-life balance. Good relationships with superiors. Company's financial stability.
A wooden cylinder has a density of 4 g/cm3 and a mass of 48 cm3. What is the volume of the wooden cylinder?
Answer:
Volume is 12 cm³
Explanation:
[tex]volume = \frac{mass}{density} \\ [/tex]
mass » 48 g
density » 4 g/cm³
[tex]volume = \frac{48}{4} \\ \\ = 12 \: {cm}^{3} [/tex]
what do you understand by 'weightlessness due to freefall'?
Answer:
Weightlessness is simply a sensation experienced by an individual when there are no external objects touching one's body and exerting a push or pull upon it.
Answer:
Weightlessness is simply a sensation experienced by an individual when there are no external objects touching one's body and exerting a push or pull upon it. ... When in free fall, the only force acting upon your body is the force of gravity - a non-contact force.
1. °C= (°F-32) X 5/9. what will be the answer?
2. °F= 9/5 (°C)+32
3. °K= °C+273
4. D= m/V
Answer:
F=9/5(°C)+32
Explanation:
Let's take an example
Take 100°C.[tex]\\ \sf\longmapsto \dfrac{9}{5}(100)+32[/tex]
[tex]\\ \sf\longmapsto 9(20)+32[/tex]
[tex]\\ \sf\longmapsto 180+32[/tex]
[tex]\\ \sf\longmapsto 212°F[/tex]
Why is the perfect mechine is not possible in the real life?
Answer:
Because the mechanical advantage of the machine is affected by friction and weight but velocity ratio is not. So, mechanical advantage is less than velocity rate. Thus, the machine's efficiency is less than 100% and can't be a perfect machine
What is the final velocity of a dragster that travels 400 meters from the start line
to the finish line in 5 seconds? *
Answer:
80m/s
Explanation:
The formula for velocity is [ v = s/t ] where s = displacement and t = time.
= 400/5
= 80m/s
Best of Luck!
velocity of car is 500 m/s and train 200 m/s when will they meet.
Answer:
If they are start traveling in opposite direction from a point then they will never meet
two spherical objects one an insulation conductor and the other a conductor.negative charges are introduced at point A in each case .which would be the position of the charges.explain your observation.
Answer:
The charge move closer to conductor it it has any charge otherwise it remains at its place
an aircraft is traveling along a runway at a velocity of 25m/s. It accelerates at a rate of 4m/s for a distance of 750m before taking off. calculate it's take-off speed.
Answer:
v = 81.394102980499 m/s
Explanation:
v = sqr(u^2 + 2as)
v - final velocity
u initial velocity
a acceleration
s displacement
which unit of measure is the correct SIunit to use in measuring the mass of a boulder?
o tons
o kilograms
o pounds
o ounces
Answer:
tons
Explanation:
A liquid has a
constant temperature
definite shape
crystal structure
definite volume
The right answer is : Definite Volume
You must be the change you wish to see in the world
Wan and Nurul sat on a see-saw. The see-saw is imbalanced because Wan’s mass is 45 kg while Nurul’s mass is only 30 kg. Suggest how Nurul can balance the see-saw.
We have that the see-saw will be balance if a weight of [tex]x=15kg[/tex] is added to Nural's side of the see-saw
[tex]x=15kg[/tex]
From the Question we are told that
Wan’s mass is [tex]M_w=45 kg[/tex]
Nurul’s mass is [tex]M_n= 30 kg.[/tex]
Generally
The Will be balance when the weight on both sides of the see-saw are equal
[tex]M_w=M_n+x[/tex]
[tex]45=30+x[/tex]
[tex]x=45-30[/tex]
[tex]x=15kg[/tex]
In conclusion
The see-saw will be balance if a weight of [tex]x=15kg[/tex] is added to Nural's side of the see-saw
[tex]x=15kg[/tex]
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What does the term "heat capacity" refer to? Question 2 options: The amount of heat energy needed to raise the temperature of a unit mass of a material one degree A ratio of the amount of heat a material will absorb to the amount of heat it immediately releases The amount of heat that must be applied to a solid to convert it to a liquid The amount of heat that a liquid can absorb until the particles speed up enough to become a gas
Answer:
Heat capacity is the ratio of the amount of heat energy transferred to an object to the resulting increase in its temperature. Molar heat capacity is a measure of the amount of heat necessary to raise the temperature of one mole of a pure substance by one degree K.
Explanation:
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