Answer:
4 m/s in negative acceleration
Explanation:
Acceleration = V- U/t
Where V is the final velocity
U is the initial velocity and t is the time given.
U = 65 m/s
V= 25 m/s
T= 10 seconds
Acceleration= (25m/s - 65m/s)÷10secs
= - 40/10
= -4m/s^2
Hence, it has a negative acceleration.
Answer:
A. negative acceleration of 4 m/s2
Hope this helps!
Explanation:
What is true of a match burned in a closed system?
Answer:
The match is made of wood or paper, mainly cellulose, a carbohydrate. When it burns, carbon and hydrogen combine with oxygen in the air and go off into the atmosphere. The match loses mass, but the mass goes somewhere else—in this case, the atmosphere. When a match burns, its mass decreases
Explanation:
PLEASE GIVE ME BRAINLIEST IF NEW IT SHOULD SAY NEAR MY ANSWER MARK AS BRAINLIEST IF NOT YOULL HAVE TO WAIT A DAY AND BRAINLY WILL REMIND YOU
How many windows should the real tree house have
Answer:
88
Explanation:
Answer:
2
Explanation:
88 was wrong and the answer then said 2
Which is a unit of volume?
A) centimeter
B) meter
C) milligram
D) milliliter
Answer:
I think milligram is the correct answer.
Answer:
D. milliliter
Explanation:
Took it on usatestprep
A car slows down from 27.7 m/s
to 10.9 m/s in 2.37 s.
What is its acceleration?
Answer:
a = (Vf - Vi) / t = (10.9 - 27.7) / 2.37 = -16.8 / 2.37 = -7.09 m/s/s
negative means slowing down
Explanation:
1. You are floating in a canoe in the middle of a swimming pool. Your friend is at the edge of the pool, carefully noting the level of the water on the side of the pool. You have a bowling ball with you in the canoe. If you carefully drop the bowling ball over the side of the canoe and it sinks to the bottom of the pool, does the water level in the pool rise or fall?
Answer:
lower
Explanation:
When you move the ball from your canoe to the water causes the water level to fall
If you carefully drop the bowling ball over the side of the canoe, and it sinks to the bottom of the pool, the water level in the pool will fall.
How to measure water level?Both the bowling ball and the canoe will float on top of the water when they are in a canoe because they will displace more water than they can hold. However, if dropped, the ball will plummet to the bottom of the pool.
The bowl sinks because it is denser than water. The ball will in this scenario move less water than its own volume.
Therefore, when the ball is with you in the canoe in the second scenario, the volume of water displaced will be less than in the first example. Consequently, lower volume
Therefore, the water level in the pool will drop if you carefully toss the bowling ball over the side of the canoe and let it land at the bottom of the pool.
To learn more about the water level, refer to the link:
https://brainly.com/question/17750427
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mix 4 L of 30°C water is 6 L of 40°C water and you’ll have water at what temperature?
Answer:
dont know
Explanation:
need points
Which of the following is a conversion from light energy to chemical energy?
a. turning on a stove to heat dinner
b. growing an apple tree
c. turning on a lamp
d. Turning on a blender
Answer:
A
Explanation:
turning on a stove to heat dinner because it undergoes a chemical reaction to transform into other substance
Growing up a tree is a conversion from light energy to chemical energy.
What is law of energy conservation?Energy can neither be created nor be destroyed , it gets only transferred from one form to another.
What is photosynthesis?The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.In simple words by the process of photosynthesis a tree makes food for itself.What happens when a tree grows?Tree makes food by absorbing the sunlight.The energy of the sunlight is used in making of ATPs in trees.ATP ( Adenosine triphosphate ) is used in various operations in trees.So, the sunlight is light energy which get converted into ATPs , which is chemical energy.
Thus, Growing up a tree is a conversion from light energy to chemical energy.
Learn more about Photosynthesis here -
https://brainly.com/question/19160081
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How did Confucius believe that kings should behave? (Site 1) HURRY!!!!!
Answer:
Confucius believe that kings should behave RIGHTLY
Explanation:
CONFUCIUS believe that kings are supposed to behave rightly and rule justly ( according to the codes of ethics ) of the land and also live a right and just life.
Confucianism is an ancient philosophy established as far back as the fifth century by Confucius it's main aim was to guide the ancient and modern systems of government in the whole of Asia. it is called a religion by some while some call it a code of ethics and way of leadership
Answer:
CONFUCIUS believe that kings are supposed to behave rightly and rule justly ( according to the codes of ethics ) of the land and also live a right and just life.
Confucianism is an ancient philosophy established as far back as the fifth century by Confucius it's main aim was to guide the ancient and modern systems of government in the whole of Asia. it is called a religion by some while some call it a code of ethics and way of leadership
Explanation:
he functional unit of the kidney is the .
Answer:
maintaining overall fluid balance regulating and filtering minerals from blood filtering waste materials from food, medications, and toxic substances.
Explanation:
Answer: Nephrons
Explanation: The structural and functional unit of the kidney is known as nephrons. These are microscopic structures found in the kidneys.
A healthy adult has 0.8 to 1.5 million nephrons in the kidney of a adult. Its main function is filtration of the blood.
Blood is filtered and the impurities are collected to excrete out of the body in the form of urine.
When a feather and coin are dropped towards the surface of the earth , do they reach ground together
Answer:
The coin will reach the ground first.
Explanation:
Because feather's mass is very low in comparison to a coin and due to air present in earth's atmosphere it will come down slowly.
hope it helps!
Answer:
The coin
Explanation:
Because the coin is heavier than the feather
is hydrogen good conductor or poor conductor
Answer:
Good one
Explanation:
Hydrogen has the highest thermal conductivity of any gas.
What is the density of the object that has a mass 13.87g and a volume of 31.75cm3?
Answer:
d=0.4368 g/cm³
Explanation:
Density of an object is defined as the ratio of its total mass to the mass volume.
So that it is
d= m/V
d= (13.87g) / (31.75cm³)
d= 0.4368g/cm³
Heat pumps move heat from __________ to __________ areas & REQUIRES energy. *
A. cold, hot
B. hot, cold
What is the electrical power when the current is 20 amps and the voltage is 15 volts? *
A. 35 watts
B. 1.33 watts
C. 300 watts
Work is a transfer of matter. *
A. True
B. False
explain how muscles and bones work together to help bend the arm.
Answer:
Bones make sure the arms structure is stable while the muscle is the one actively moving it and carrying out actions.
A cooker has a resistance of 100 Ohms and a power rating of 0.5KW. What potential difference would be needed to run the
cooker
Answer:
The potential difference is 224V .
Explanation:
Given that the formula of power is P = I×V and formula of voltage is V = I×R where both I represents current.
Given that the formula of power is P = I×V and formula of voltage is V = I×R where both I represents current. Then you have to use voltage formula to make I the subject :
[tex]v = i \times r[/tex]
[tex]i = \frac{v}{r} [/tex]
So that you can substitute it into the formula of power :
[tex]p = i \times v[/tex]
[tex]p = \frac{v}{r} \times v[/tex]
[tex]p = \frac{ {v}^{2} }{r} [/tex]
Let p = 500W,
Let r = 100Ω,
[tex]500 = \frac{ {v}^{2} }{100} [/tex]
[tex]500 \times 100 = {v}^{2} [/tex]
[tex] {v}^{2} = 50 \: 000[/tex]
[tex]v = \sqrt{50000} [/tex]
[tex]v = 224 \: \: (3s.f)[/tex]
Name one benefit and one risk of each biotechnology practice:
Genetic engineering:
Cloning:
Artificial selection:
PLEASE!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Genetic Engineering:
Benefits: More nutritious food, less use of pesticides, increased supply of food with reduced cost and longer shelf life, faster growing plants and animals
Risk: Creating foods that can cause allergic reaction or that are toxic, Unexpected ir harmful genetic changes, genes moving from one GM plant or animal to anotherplant or animal that is not genetically engineered
Cloning:
Benefits: accelerated reproduction of farmers productive livestock to better produce safe and healthy foods, reproduction of the healthiest animals, minimizing the use of antibiotics, growth hormones and chemicals
Risks: Unwantedhealty effects, defects, premature aging and problems with the immune system
Artificial Selection:
Benefits: no safety issues as those brought by genetic engineering, cheap for agricultural businesses, morally accepted, produce crops with higher yield
Risks: Removes variation, makes organism susceptible to diseasesor changes in environment, unable to control genes inherited by offspring
Answer:
Genetic Engineering
Benefits
-Ability to create food that is resistant to pests, cold, and disease.
-Greater food production volume and increased vitamins.
Risks
-Concerns about long-term health risks.
-Lack of regulation.
Cloning
Benefits
-Ability to increase endangered animal populations.
-Possibility of eliminating diseases and defective genes.
Risks
-Shorter lifespan for cloned animals.
-Greater chance of health issues for cloned animals.
Artificial Selection
Benefits
-Allows for selection of desired traits.
-Ability to create better versions of organisms.
Risks
-Loss of genetic diversity.
-Increased chance of diseases that can shorten lifespan.
Explanation:
The graph to the right represents the change in velocity of four cars over a period of 10 hours. Which line represents the car with the greatest acceleration?
A. A C. C
B. B D. D
Please help me
Answer:
there is an option for uploading the pic of a diagram while posing any question on brainly. hope you use that feature of the app to upload graph of your question so that it can be well answered
Answer: It’s A!
Explanation: I took the test
A potential difference of 24 V is applied to a 150-ohm resistor. How much current flows through the resistor?
Given :- A resistor of 150 ohm, hence Resistance (R) = 150 ohm
Potential Difference (v) = 24 V
Current (I) = ?
V = IR
24 = I × 150
I = 24/150
I = 0.16 ampere
hope it helps!
Refer to the model below. A science student is camping with her family for one month at Stone Mountain Park. In a journal she records a model of the moon phases she observes. If she began recording the moon phases at position X, which sequence of Moon phase models could be seen by her during the 4-week period?
Answer:
New Moon - Crescent Moom ---- Full Moon ---- Waning Quarter
Explanation:
The Moon revolves around the Earth in a 28 day period, which is approximately one Earth month, therefore S the student has been recording the movement of the Moon for 4 Earth weeks this is a period of complete revolution of the Moon .
Consequently you must register the following phases
New Moon - Crescent Moom ---- Full Moon ---- Waning Quarter
in the period where it begins, it must go through the cycle in an orderly way to the right.
What type of phase change occurs when water vapor in the atmosphere changes to liquid water in clouds?
Answer:
condensation, the process of changing from a gas to a liquid
- Un automóvil parte del reposo y acelera uniformemente hasta alcanzar una rapidez de 0,255km/h en un tiempo determinado de 3/4 min. Determinar su aceleración y la distancia recorrida.
Answer:
a). la acelaración del automóvil es [tex]1.574x10^{-6}km/s^{2}[/tex]
b). la distancia recorrida por el automóvil es [tex]1.59x10^{-3}km[/tex]
La aceleración puede ser encontrada por medio de la ecuación cinemática que corresponde a un movimiento rectilíneo uniformemente variado.
[tex]a = \frac{v_{2}-v_{1}}{t}[/tex] (1)
Donde [tex]v_{2}[/tex] es la velocidad final y [tex]v_{1}[/tex] es la velocidad inicial.
La velocidad inicial del automóvil sera cero ([tex]v_{1} = 0[/tex]) ya que parte del reposo.
Antes de remplazar los valores en la ecuación 1 es necesario expresar el tiempo en unidades de segundos.
[tex]t = 0.75min \cdot \frac{60s}{1min}[/tex] ⇒ [tex]45s[/tex]
La rapidez final puede ser expresada en unidades de [tex]km/s[/tex]:
[tex]v_{2} = 7.083x10^{-5}km/s[/tex]
[tex]a = \frac{7.083x10^{-5}km/s - 0km/s}{45s}[/tex]
[tex]a = 1.574x10^{-6}km/s^{2}[/tex]
Por lo tanto, la acelaración del automóvil es [tex]1.574x10^{-6}km/s^{2}[/tex]
Luego para calcular la distancia se puede utilizar la siguiente ecuación.
[tex]d = v_{1}t + \frac{1}{2}at^{2}[/tex] (2)
[tex]d = (0km/s)(45s) + \frac{1}{2}(1.574x10^{-6}km/s^{2})(45s)^{2}[/tex]
[tex]d = 1.59x10^{-3}km[/tex]
Por lo tanto, la distancia recorrida por el automóvil es [tex]1.59x10^{-3}km[/tex]
How is a problem and solution text
structure different from a cause and
effect text structure?
Choose all the answers that apply.
Power is calculated using ___.
time
work
friction
horsepower
efficiency
Answer:
Work
Explanation:
A light ray has an angle of incidence of 34º. The reflected ray will make what angle with the reflecting surface?
Answer:
Angle of incidence = Angle of Reflection
34° = Angle of Reflection
So, Angle of Reflection is equal to 34°
hope it helps!
Answer: 56 degrees
Explanation:
The angle of incidence is equal to the angle of reflection, but it is not asking us for the angle of reflection. It is asking us for the angle with the reflected SURFACE. It is 90-34= 56. Look at the pic attached if you need a labelled diagram
What is thermal energy
Answer:
Thermal Energy. Thermal energy is the internal energy of an object due to the kinetic energy of its atoms and/or molecules. The atoms and/or molecules of a hotter object have greater kinetic energy than those of a colder one, in the form of vibrational, rotational, or, in the case of a gas, translational motion.
Explanation:
Jada’s family pulls into a gas station. Her mother fills up the car’s tank with fuel from a pump. Jada notices this symbol on the pump.
Image shows a pump at a gas station with a symbol of corn on it.
What do you think the symbol indicates?
A. This gasoline is to be used only in farm vehicles.
B. It is not safe to have gasoline around food products.
C. This gasoline can also be used as a fertilizer to help plants grow.
D. A biomass has been used as part of the fuel.
Answer:
D- a biomass has been used as a part of the fuel.
what is force derived from
Answer:
Force can also be described intuitively as a push or a pull. ... It is measured in the SI unit of newtons and represented by the symbol F. The original form of Newton's second law states that the net force acting upon an object is equal to the rate at which its momentum changes with time.
Explanation:
hope this helps : )
Nitrogen-14 has 7 protons. How many neutrons does it have?
Answer:
7
Explanation:
Using information found on the Periodic Table of Elements:
Nitrogen contains 7 protons, 7 neutrons, and 7 electrons.
..
Atomic number is 7
Atomic mass is 14
The mass number is the sum of protons and neutrons in the nucleus.
=> You can subtract the atomic number from the mass number to find the number of neutrons.
Two water waves meet at the same point, one having a displacement above equilibrium of 60 cm and the other having a displacement above equilibrium of 80 cm.
Answer:
The resultant displacement is 140 cm
Explanation:
say first displacement d₁ is 60 cm
and second displacement d₂ is 80 cm
Resultant displacement = d₁ + d₂
= 60 + 80
= 140 cm
Answer:
Explanation:
To solve this problem it will be necessary to apply the interference principle.
Under this principle interference is understood as a phenomenon in which two or more waves overlap to form a resulting wave of greater, lesser or equal amplitude. In this case, if both are at the same point, the result of the total displacement will be the sum of the individual displacements, therefore
[tex]x = \sum h_i\\\\x = 60cm + 80cm\\\\x =140cm[/tex]
Therefore the resulting displacement above equilibrium is 140cmA paint brush is dropped from the top of a tall ladder and free falls to the ground. What changes, if any, would be observed of the velocity and the acceleration of the brush as it falls? Pick the two answers. The velocity increases. The velocity decreases. The velocity remains a constant value. The acceleration increases. The acceleration decreases. The acceleration remains a constant value.
Answer:
Explanation:
As the paint brush is dropped from the top of a tall ladder it started free falling
i.e. velocity of brush increases as it falls down due to the acceleration provided by gravity.
We know acceleration due to gravity is the attraction experienced by the object due to earth attraction
Value of acceleration due to gravity is constant i.e. [tex]9.8\ m/s^2[/tex]
Therefore the correct choice is
velocity is increasing and acceleration is constant
