Answer:
the answer is 14,700
Explanation:
hope this helps :))
Answer:
14,700
Explanation:
were using the potential energy equation.
P.E- (150 kg) (9.8m/s2) (25 m) = 14,700
An object is moving along a straight line. The graph shows the velocity of the object over
time.
What is the instantaneous acceleration of the object at time = 9.5 seconds?
A.-20 m/s2
B.0 m/s2
C.20 m/s2
D.-10 m/s2
Answer:
From 9 to 10 sec the velocity is decreasing at a constant rate.
Change in V = 20 m/s - 30 m/s = -10 m/s
Since acceleration is constant from point E to point F (straight line)
and t = 9.5 sec is on this line
a = (20 m/s - 30 m/s) / 1 sec = -10 m/s^2
The instantaneous acceleration of the object at time = 9.5 seconds is - 10 m/s².
What is acceleration?Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.
From t = 9 second to t =10 second the velocity of the object decreases at a constant rate.
Change in velocity of the object = final velocity - initial velocity
= 20 m/s - 30 m/s
= -10 m/s
time interval is = 10 sec - 9 sec = 1 sec.
Hence, acceleration of the object is: a = Change in velocity/ time interval
= - 10 m/s/1s
= -10 m/s²
Therefore, the instantaneous acceleration of the object at time = 9.5 seconds is - 10 m/s².
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Please Help! Im dumb.
Two completely different compounds may contain identical elements.
True or False
Which best describes internet wikis as a source of scientific information
Answer:
They are written or edited by anyone
Explanation:
In a science demonstration, a teacher mixed zinc (Zn) with hydrogen chloride (HCl) in a flask and quickly attached a balloon over the mouth of the flask. Bubbles formed in the solution and the balloon inflated.
What most likely occurred during this demonstration?
:The Zn and HCl both retained their identity.
:Either Zn or HCl, but not both, retained its identity.
:Evaporation of one of the substances occurred.
:One or more new substances formed.
Answer:
d
Explanation:
When a teacher mixed zinc (Zn) with hydrogen chloride (HCl), one or more new substances formed. Hence, option (d) is correct.
What is chemical reaction?A chemical reaction is a procedure that causes one group of chemical components to change chemically into another.
Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present).
The study of chemical processes involving unstable and radioactive elements, where both electronic and nuclear changes may take place, is known as nuclear chemistry.
When the teacher mixed zinc (Zn) with hydrogen chloride (HCl), chemical reaction happens and more than one new substances formed.
2Zn + 2HCl → 2ZnCl + H₂
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If a swimmer is traveling at a constant speed of 2 m/s, how long would it
take to swim the length of a 50-meter Olympic sized pool ?*
A snail can move app approximately 0.30 inches per minute. How many meters can the snail cover in 15 minutes
Answer:
4.5 because just do the math and its 4.5
A hot air balloon is traveling vertically upward at a constant speed of 7.0 m/s.
When it is 21 m above the ground, a package is released from the balloon. For
how long is it in the air?
Answer:
The time spent in air by the package is 1.5 s
Explanation:
Given;
speed of the balloon, v = 7.0 m/s
distance traveled by the balloon, d = 21 m
The time spent by the object in the air is give by;
d = vt + ¹/₂gt²
21 = 7t + ¹/₂(9.8)(t²)
21 = 7t + 4.9t²
4.9t² + 7t -21 = 0
solve this quadratic expression, and the value of t will be
t = 1.5 s
Therefore, the time spent in air by the package is 1.5 s
Solve.
(3.0 × 107)x (1.5 × 103)
Answer:49594.5
Explanation:
You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 29.7 N and the spring scale reads 17.6 N.
Hello. This question is incomplete. The full question is:
You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 29.7 N and the spring scale reads 17.6 N.
What is the magnitude of the force that Earth exerts on the bag?
Answer:
47.3 N
Explanation:
the entire system shown in the question above is at rest. Which greatly facilitates the calculation that we must do. In this case, to measure the magnitude that the force of the earth has on the backpack, you only need to add the two forces that you already know in the system.
In that case, it would be, you should calculate:
F= 29.7 N+ 17.6 N
F= 47.3N
Study habits include
a.
How you prepare for assignments
c.
What questions you ask your teacher
b.
How you take tests
d.
All of these
Please select the best answer from the choices provided
A
B
C
D
Answer:
D
Explanation:
Study habits include, how you prepare for assignments, what questions you ask your teacher, and How you take tests, all of these come under study habits, therefore the correct answer is option D.
What is science?The deliberate evidenced based quest and application of information and comprehension of the natural implications for society is what is known as research.
Science is a methodology of discovering more about the world.
People may contribute to the development of new knowledge through science and utilize it to promote their objectives.
A student's study habits include factors like how they approach tasks, questions they ask their professors, and how they prepare for the exam
Thus, the correct answer is option D.
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The second image !!!!!!
Answer:
Explanation:
No, not any of these substance will float in Methanol , simply because Methanol has a density of 0.79 g, if you put any substance that weighs more than 0.79 g, it will sink, it all depends on the weight if it is more or less than methanol
2: D=m/v
D=135/50 = 2.7 g/cm³ ( Aluminum)
D=M/V
if two objects has the same mass but one has larger volume, then te one with larger volume has less density
example : 2 objects
mass of both=350
volume of the first one=500 and the other 750
D1=M1/V1 = 350/500 =0.7
D2 = M2/V2 = 350/750 = 0.4666
D1 is larger than D2( with larger volume )
A force of 200N is creating a pressure of 50Pa on a surface. Calculate the area of the surface.
Answer:
4kg
Explanation:
pressure=50pa
force=200N
Area=?
now,
pressure=force/area
50=200/area
area=200/50
area=4kg
The pressure is the forces acting on a given area. Hence, the area of the surface with a pressure of 50 Pa by a force of 200 N is 4 m².
What is force?Force is an external agent acting on a object to deform it or to change its state form motion or rest. Force is a vector quantity and it is characterised by its magnitude and direction. The unit of force is Newton (N).
Pressure is the force applied on unit area. Thus, as the force increases, pressure increases. Pressure can have the units in atm, pa, N/m² etc.
Pressure = Force / area.
Given that force = 200 N
pressure = 50 Pa = 50 N/m²
Therefore, area = force/pressure
= 200 N / 50 Pa
= 4 m²
Therefore, the area of the surface is 4 m².
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What do the planets have in common and how are they different?
Answer:
They vary quite a lot, yet there are some similarities
Explanation:
With Mercury, you have a hot and barren expanse of rock
With Venus, you also have a fairly hot and barren expanse of rock, with a molten core
With Earth, you have a warm/cool variant with water and a full atmosphere
With Mars, you have a colder and barren expanse of valleys and rock, with a rather paste-like ground
With Jupiter, we have our first gas giant, covered in clouds with a thick atmosphere
With Saturn, it is yet another gas giant, with rings of gas and rock and a dense core of metals, such as iron and nickel
With Uranus, it is also rather gas-full with a fair amount of water and methane, which results in its bluish color (an ice giant)
And finally with Neptune, it is the other ice giant, consisting of water, methane, and ammonia
So there are some similarities (gases, water, land formations, etc.) and some differences (rings, temperature, structure, etc.). Our planets are very unique to one another and continue to engage and surprise us.
Which explains how to calculate the average acceleration of a moving object?
1.Divide the change in velocity by the change in time.
2.Multiply the change in time by the change in velocity.
3.Divide the change in time by the change in velocity.
4.Subtract the velocity from the change in time.
Answer Multiply the acceleration by time to obtain the velocity change: velocity change = 6.95 * 4 = 27.8 m/s . Since the initial velocity was zero, the final velocity is equal to the change of speed.
v, start subscript, a, v, g, end subscript, equals, start fraction, delta, x, divided by, t, end fraction, equals, start fraction, minus, 4, start text, space, m, end text, divided by, 5, start text, space, s, end text, end fraction, equals, minus, 0, point, 8, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction
The minus sign indicates the average velocity is also toward the rear of the plane.
The average velocity of an object does not tell us anything about what happens to it between the starting point and ending point, however. For example, we cannot tell from average velocity whether the airplane passenger stops momentarily or backs up before he goes to the back of the plane. To get more details, we must consider smaller segments of the trip over smaller time intervals. For instance, in the figure below, we see that the total trip displacement,
Answer:
bdjdiosfjigjdigjtrht <3
Explanation:
What is the smallest part of a chemical compound that has all the properties
of that compound
A. A nucleus
B. A mineral
C. An atom
D. A molecule
Answer:
D. A Molecule
Explanation:
The smallest particle of a compound that still has the properties of the compound is a molecule. It is composed of two or more bonded atoms.
The smallest part of a chemical compound that has all the properties of that compound is a molecule (option d)
In the world of chemistry, substances are composed of tiny units called atoms, and these atoms bond together to form chemical compounds.
Option A, a nucleus, refers to the central core of an atom and consists of protons and neutrons. While essential for an atom, a nucleus alone does not represent a complete chemical compound.
Option B, a mineral, is a naturally occurring inorganic substance with a specific chemical composition and a definite atomic structure. However, minerals are not the smallest parts of a chemical compound.
Option C, an atom, is the fundamental building block of matter. It consists of a nucleus (containing protons and neutrons) surrounded by electrons. While atoms are crucial for forming compounds, they are not the smallest unit that retains all the properties of a compound.
Therefore, the correct answer is Option D, a molecule. A molecule is a group of two or more atoms bonded together, representing the smallest part of a chemical compound that possesses all the characteristics and properties of that compound.
Hence the correct option is (d).
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A 3.00 kg mass is traveling at an initial speed of 25.0 m/s. What is the
magnitude of the force required to bring the mass to rest in a distance of 62.5m?
Answer:
The magnitude of the force required to bring the mass to rest is 15 N.
Explanation:
Given;
mass, m = 3 .00 kg
initial speed of the mass, u = 25 m/s
distance traveled by the mass, d = 62.5 m
The acceleration of the mass is given as;
v² = u² + 2ad
at the maximum distance of 62.5 m, the final velocity of the mass = 0
0 = u² + 2ad
-2ad = u²
-a = u²/2d
-a = (25)² / (2 x 62.5)
-a = 5
a = -5 m/s²
the magnitude of the acceleration = 5 m/s²
Apply Newton's second law of motion;
F = ma
F = 3 x 5
F = 15 N
Therefore, the magnitude of the force required to bring the mass to rest is 15 N.
A car accelerates from rest at 7.2 m/s 2 . How much time does it need to attain a speed of 4 m/s? Answer in units of s.
Answer:
The time is 0.6 sec.
Explanation:
Given that,
Acceleration of car = 7.2 m/s²
Speed = 4 m/s
We need to calculate the time
Using equation of motion
[tex]v=u+at[/tex]
Where, u = initial velocity
v = final velocity
a = acceleration
t = time
Put the value in the equation
[tex]4=0+7.2\times t[/tex]
[tex]t=\dfrac{4}{7.2}[/tex]
[tex]t=0.6\ sec[/tex]
Hence, The time is 0.6 sec.
GO
10 20
What is one standard kilogram define in Si system
Answer:
The mass of cylinder made up of alloy of platinum iridium that is kept at international bureau of weights and measures is called one standard kilogram.
The system of seven fundamental quantities is called SI system .
A jet plane acceleration along a straight run way from rest to a speed of 140 m/s in 50 seconds when it took off. Calculate:
1- it’s change of velocity
2- it’s acceleration
Please help me it’s emergency
Answer:
Vf=140 m/s
Vi=0
t=50s
Explanation:
1. Acceleration is called change of velocity.
2. a=Vf-Vi/t
a=140-0/50
a=140/50
a=2.8m/s^2
Ten Seconds after starting from rest, a car moving at 40 m/s what is the cars average acceleration
Answer:
[tex]4ms {}^{ - 2} [/tex]
Explanation:
We can use equation of motion to solve this
[tex]v = u + at \\ 40 = 0 + a(10) \\ a = 4m {s}^{ - 2} [/tex]
The graph shows the motion of a lift starting at rest and initially moving upwards: What is the acceleration of the lift between 0 and A?
Answer:
0.67 m/s²
Explanation:
The following data were obtained from the question:
Initial velocity (u) = 0 m/s
Final velocity (v) = 2 m/s
Time (t) = 3 secs
Acceleration (a) =?
Acceleration can be defined as the rate of change of velocity with time. It can be represented mathematically as:
Acceleration = change in velocity /time.
a = (v – u) /t
With the above formula, we can calculate the acceleration of the lift as shown below:
Initial velocity (u) = 0 m/s
Final velocity (v) = 2 m/s
Time (t) = 3 secs
Acceleration (a) =?
a = (v – u) /t
a = (2 – 0) /3
a = 2/3
a = 0.67 m/s²
Thus, the acceleration of the lift between 0 and A is 0.67 m/s².
Subduction occurs when:
-a plate with continental crust sinks beneath a plate with
oceanic crust
-a plate with oceanic crust sinks beneath a plate with
continental crust
-two plates move apart from one another
two plates slide past one another
Explanation:
a plate with oceanic crust sinks beneath a plate with
continental crust is the answer
A cyclist must travel 800 kilometers. How many days will the trip take if the cyclist travels at an average speed of 16 km/h
Answer:
2 days 2 hours or 50 hours
Explanation:
800/16=50
When your body takes the chemical energy in food and transforms it so you can move, what type of energy did it transform it into?
Radiant energy
Chemical energy
Thermal energy
Mechanical energy
Answer:
chemical I think
Explanation:
hope this helps
Answer:
its actually mechanical energy
Explanation:
i took my quiz
What do all of the elements in group 13 have in common?
human activities can have positive and negative effects on the environment. Humans can benefit natural areas by
A. throwing waste products in these areas.
B. removing all the vegetation from theses areas.
C. polluting the areas by burning fossil fuels.
D. preserving the natural resources that they provide.
A toy car has an initial velocity of 5 m/s and experiences a constant acceleration of 2.0 m/s2. How far does the toy car travel before reaching a velocity of 11 m/s? Write your answer to one decimal place.
Answer:t would be 17 m/s
If we use V2 = V1 + a*t
Sub in 5 for v1
2m/s*2 for a
And
6 for t
That should give you the answer.
Matter is all around us and is made of atoms. How are atoms of different elements different from each other? How do these differences relate to their properties?
Answer:
it all depends on the protons and the neutrons of that element.
_________________ are labels for ranges of weight that are greater than what is generally considered healthy for a given height.
A. Overweight and obesity
B. Overweight and morbidity
C. Obesity and diabetes
D. Obesity and heft
Answer: A. Overweight and obesity
Explanation:
Overweight and obesity are labeled for ranges of weight that are greater than what is generally considered healthy for a given height. Hence, option A is correct.
What are Overweight and obesity?Overweight and obesity are calculated by Body Mass Index (BMI). BMI is a person's weight in kilograms divided by the square of height in meters. The healthy adult human BMI ranges from 18.5 to 25.
If BMI is less than 18.5, it falls within the underweight range. If the BMI ranges from 25.0 to 29.9, it falls within the overweight range. If the BMI is greater than 30, it comes under the obesity range. A high BMI indicates high fatness.
Obesity and overweight are determined as an abnormal growth or excessive fat accumulation in the healthy range. It is caused by an energy imbalance between calories consumed and calories expended.
Obesity and Being overweight can cause certain diseases and health issues. It increases the risk of high blood pressure, heart disease, diabetes, and stroke.
It is important to maintain a healthy range BMI. Obesity and overweight are reduced by making the choice of healthier foods and regular physical activities like yoga and exercise.
Hence, The correct option is A) Overweight and Obesity.
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What is the velocity of the object moving from 3 - 7 seconds?
O m/s
-6 m/s
6 m/s
That's the flat-top marked ' B '.
It's 6 m/s.