Answer:
The answer is 40 NExplanation:
The force acting on an object can be found by using the formula
force = mass × accelerationFrom the question
mass = 4 kg
acceleration = 10 m/s²
So we have
force = 4 × 10
We have the final answer as
40 NHope this helps you
What is the density of 244 grams of aluminum that has a volume of 90 ml?
Answer:
The answer is 2.71 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 244 g
volume = 90 mL
So we have
[tex]density = \frac{244}{90} = \frac{122}{45} \\ = 2.71111111...[/tex]
We have the final answer as
2.71 g/mLHope this helps you
Change in speed = 14 m/s, time taken = 2 seconds. Calculate the acceleration.
A thin plastic rod of length 2.5 m is rubbed all over with wool, and acquires a charge of 75 nC, distributed uniformly over its surface. Calculate the magnitude of the electric field due to the rod at a location 7 cm from the midpoint of the rod. Do the calculation two ways, first using the exact formula for a rod of any length, and second using the approximate formula for a long rod.
Answer:
find out the le
Explanation:
what are the types of energy sources based on the time of replacement ?
Answer:
In general there are three sub-segments of "alternative" energy investment: solar energy, wind energy and hybrid electric vehicles
A proposed solution to a scientific prob-
lem is called a
A hypothesis and/or theory is s a proposed solution to a scientific problem.
A hypothesis is an assumption based on some basic, limited evidence for further investigation. A proposed solution to a scientific problem is called a hypothesis.
What is scientific hypothesis ?The scientific hypothesis is defined as the relationship between two or more variables or a proposed explanation for some observed process. The scientific hypothesis can happen during scientific experiment.
The good scientific hypothesis may possess a hypothesis must be testable and falsifiable. Someone must be able to test a given hypothesis through scientific experimentation.
A hypothesis is an assumption based on some basic, limited evidence for further investigation. A proposed solution to a scientific problem is called a hypothesis.
Thus, A proposed solution to a scientific problem is called a hypothesis.
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List three examples of familiar organisms known as plants as used in the cell
Answer:
rose
sunflower
seaweed
In a balanced chemical reaction, the total mass of the products always equals the
a.molar mass of the reactants.
c. total mass of the reactants.
b. atomic mass of the reactants.
d. proportional masses of the reactants.
Answer:
A balanced chemical reaction preforms the law of conservation of mass, when the total mass of the products always equals the total mass of the reactants.
Explanation:
In a balanced chemical reaction, the total mass of the products always equals the total mass of the reactants. Thus the total mass of the system is conserved.
What is mass conservation?According to the law of conservation of mass, mass can neither be created nor be destroyed. Hence, the total mass of the system is conserved. However, mass can be transformed into equivalent energy.
The balanced chemical equation of a reaction represents the perfect stoichiometric ratios of each reactants and products. The number of each elements in the product side must be equal to their number in the reactant side.
Therefore, the total mass of a products in a reaction is always equal to the total mass of reactants and no new atoms are created or any reactant elements are destroyed.
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Which statement about mass and inertia is not true?
A. Both mass and inertia play a role in Newton's first law.
B.Mass is a quantitative measurement of inertia.
C. The tendency of an object to remain at rest results from a property called inertia.
D.Newton's first law is sometimes called the relative inertia law.""
Answer:
D. Newton's first law is sometimes called the relative inertia law.
Explanation:
Newton's first law of motion states that an object at rest will stay at rest and that in motion will stay in motion with same speed and in the same direction unless an unbalanced force acts on it. It is also called the law inertia. Mass and inertia play a role in this law because mass is a quantity that mainly depends on inertia in that a body with more inertial will exhibit more mass.
Stars and planets form when dust and gas from space is pulled together by.. what?
Answer:
gravity?
Explanation:
i dont have a lot of context but this is what i thought of so...
Stars and planets form when dust and gas from space is pulled together by gravitation.
What is gravitation?In mechanics, gravity, often known as gravitation, is the force of attraction that acts on all matter. It has little impact on determining the intrinsic characteristics of common stuff because it is by far the weakest known force in nature.
In contrast, it governs the formations and evolution of stars, galaxies, and the entire cosmos by its extensive and ubiquitous action, which affects the trajectories of objects in the solar system and beyond the universe. All objects on Earth experience weight, or a gravitational pull that is proportionate to their mass and is imposed by the planet's mass.
Hence, the stars and planets form when dust and gas from space is pulled together by gravitation.
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Please help me
1. Rank the following items from MOST
inertia to LEAST inertia: Chick Fil A
Biscuit, Feather, Elephant, a 1st grader.
Answer:firt answer corrcect who answerd
Explanation:
Feather, Biscuit, a 1st grader, Elephant is order of LEAST inertia to MOST inertia.
What is inertia?
Inertia is the resistance of an object to any change in motion. Inertia is proportional the mass of the object: in fact, as we experience in common situations, the larger the mass of an object, the more difficult it is to change its motion.
Inertia of an object is its inherited property. It is the measure of its mass. It is clear that the inertia of an object depends directly on its mass. Mass of an object is the amount of matter contained in it. It is same at every location.
Given that in the case four thing Biscuit, Feather, Elephant, a 1st grader out of which Feather, Biscuit, a 1st grader, Elephant is order of LEAST inertia to MOST inertia.
Feather, Biscuit, a 1st grader, Elephant is order of LEAST inertia to MOST inertia.
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What speed should a spaceship of mass 5.21 x 107kg moving around a planet
only by the gravitational force be, if the distance between them is 6.27 x 108 m
and the mass of the planet is 4.76 x 1026 kg? Estimate G as 6.67 * 10-11 N (m/kg)
A. 7.12 x 103 m/s
B. 6.23 x 103 m/s
С. 4.25 x 103 m/s
D. 7.43 105 m/s
E. 7.25 x 103 m/s
Answer: A
Explanation:
The speed of the spaceship moving around a planet only by the gravitational force is 7.12 × 10³ m/s.
What is centrifugal force?A fictitious force that moves in a circle and is directed away from the center of the circle is called centrifugal force. When measurements are taken in an inertial frame of reference, the force does not exist. It only becomes relevant when we switch from a ground/inertial reference frame to a rotating reference frame.
The centrifugal force's unit is newton.
As the gravitational force is balanced by centrifugal force is orbital motion:
Gravitational force =centrifugal force
GMm/r² = mv²/r
v² = GM/r
v = √( GM/r)
= √(6.67×10⁻¹¹ ×4.76 ×10²⁶/6.27 ×10⁸)
= 7.12 × 10³ m/s.
Hence, The speed of the spaceship is 7.12 × 10³ m/s. Hence, option (A) is correct.
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a hypothesis is
a- an experiment
b - a question
c - an educated guess ( an ' inference ;)
d - a conclusion
Answer:
D a conclusion
Explanation:
The definition of hypothesis is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation
Which type of investigation is lised to compare two subiects?
Comparative
Experimental
Descriptive
In recent years, assistive technologies have been developed to give people with disabilities equal access to resources. Apex
Answer:
as businesses became aware of the demand for equal access, they began t invest in research and development to meet the desires of their costumers.
Explanation:
just took the test, still failing :D
How does a transistor work?
i need three examples !
Answer:
A transistor works when the electrons and the holes start moving across the two junctions between the n-type and p-type silicon. ... By turning a small input current into a large output current, the transistor acts like an amplifier. But it also acts like a switch at the same time.
Explanation:
A man is riding his 4-wheeler at 60 km/hr. If he is riding it constantly at
this rate for 1.5 hours, how far did he ride?
Answer: 90 km
Explanation: 60 * 1.5
2. The Himalayas in central Asia are the tallest mountains in the world. But fossils of seashells can be found high in these mountains, far from any ocean.
How do you think they got there?
Answer:
The sea level could have been much higher in the past.
Explanation:
The tectonic plates shifted and the mountain rose from there.
They are trapped throughout the rock whereas the seashells have been on the floor of a modest seafloor.
These same containers dropped down on the base of the silt level or sheet, as well as those layering finally became rock.Few more million generations previously, the Indian civilization or the subcontinent crashed well with the continents of Asia, making the Himalayan mountains rock which thus previously were such a sea level.
Thus the above response is appropriate.
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Unlike secondary pollutants,
pollutants are
released directly into the air by natural processes or by human
activities
Answer:
True
Explanation:
Why is there no up and down in space
Answer:
Because there is no gravity determining where you are.
Explanation:
I hope this helps
have a good day :)
A student ties a ball at the end of a string and whirls the string at a constant speed. If the radius of the circle along which the ball moves is 1.2 m and the acceleration is 7.5 m/s2what is the speed of the ball?
a = v ² / R
where a is acceleration, v is speed, and R is the radius. So
7.5 m/s² = v ² / (1.2 m)
v ² = (7.5 m/s²) / (1.2 m)
v ≈ 6.8 m/s
What did scientists create using scientific measurements?
Answer:
lines?
Explanation:
A fish is swimming around the 720-meter perimeter of her pond. If she swims 10 laps in 120 minutes, what is her average speed in m/min
Answer:
60
Explanation:
scientific findings that prove the strong nuclear force exsist
Answer: The strong nuclear force is one of the four fundamental forces in nature; the other three are gravity, electromagnetism and the weak force. As its name implies, the strong force is the strongest force of the four. It is responsible for binding together the fundamental particles of matter to form larger particles
Q7 Describe two types of atomic change that produce electromagnetic
waves.
Tim was recently released from his last job. He was very rigid and would not change a product design once he began a project. He is now working for a new engineering firm and has learned from his last mistake. He is willing to meet with clients to change the needs of each and every situation. As a result, his work is now .
Answer:
Flexible and responsive to the clients requests
Explanation:
Change in design is the alteration of the specification of a product based on present or current requirements, as such change in design can take place at any stage of a product life cycle.
However, it is more cost effective to make changes to the design at the early stages of a product than at the later stages, due to the cost incurred in making adjustments and the previous expenses incurred if the design that was later changed had moved into more advanced stages.
The image below shows the same egg in water (on the left) and in seawater (on the right). What must be true about these liquids?
a
The seawater is less dense than the plain water
b
The seawater is denser than the plain water
c
The plain water and the seawater have equal densities
d
It is impossible to tell which liquid is denser
Answer:
C
Explanation:
the correct answer is C
At $0.095/kwh, what does it cost to leave a 25 w porch light on day and night for a year?
Answer:
It will cost $20.81
Explanation:
Cost of Electricity
The rate of the cost of electricity is usually expressed in $/KWH because the consumption of electricity is measured in Kilowatts-hour.
If a 25W porch light is on day and night for a full year, the electricity consumption is:
25W*24 H/Day*365 Day/year* 1 year=219,000 WH
converting to KWH: 219,000 WH = 219,000 /1000 KWH = 219 KWH
The rate is $0.095/KWH, thus:
The cost of electricity is 219 KWH*$0.095/KWH= $20.81
It will cost $20.81
Noah Formula is in airplane which is flying at constant speed in a circular course of radius 5000 m., circling O'Hare Airport prior to landing. Noah observes that the plane completes each round trip in 400 seconds. What is the speed of the airplane? What is centripetal acceleration?
Answer:
(a). The speed of the airplane is 78.53 m/s.
(b). The centripetal acceleration 1.234 m/s².
Explanation:
Given that,
Radius = 5000 m
Time = 400 second
We need to calculate the speed of the airplane
Using formula of speed
[tex]v=\dfrac{d}{t}[/tex]
[tex]v= \dfrac{2\pi r}{t}[/tex]
Put the value into the formula
[tex]v=\dfrac{2\times\pi\times5000}{400}[/tex]
[tex]v=78.53\ m/s[/tex]
We need to calculate the centripetal acceleration
Using formula formula
[tex]a=\dfrac{v^2}{r}[/tex]
Put the value into the formula
[tex]a=\dfrac{78.53^2}{5000}[/tex]
[tex]a=1.234\ m/s^2[/tex]
Hence, (a). The speed of the airplane is 78.53 m/s.
(b). The centripetal acceleration 1.234 m/s².
Need help with this ! ————————————
Explanation:
i think the answer is displacement
Someone please help me!!!
Answer:
i don’t understand
Explanation:
Answer:
There's no question-
