Answer:
True
Explanation:
Are acceleration and force proportional or inversely proportional values?
Answer:
Yes, acceleration and force are directly proportional to each other.
Explanation:
The force acting on an object is given by :
F = ma
Where
m is mass
a is acceleration
It can be clear from the above formula that the acceleration and the force are directly proportional to each other.
I got stuck on this question
Answer it 2n
Explanation:
A rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. Which statement
correctly describes the momentum of the rubber ball?
a. Its magnitude increased and its direction changed.
b. Its magnitude increased but its direction remained the same.
c. Its magnitude remained the same but its direction changed.
d. Its magnitude and its direction both remained the same.
Answer:
d. Its magnitude and its direction both remained the same.
Explanation:
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
[tex] Momentum = mass * velocity [/tex]
The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.
This ultimately implies that, the law of conservation of momentum states that if objects exert forces only on each other, their total momentum is conserved.
In this scenario, a rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. Thus, the statement which correctly describes the momentum of the rubber ball is that its magnitude and its direction both remained the same because its velocity didn't change while returning to the thrower.
The correct statement should be "Its magnitude remained the same but its direction changed". Option C is correct.
Given information:
A rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s.
Now, the mass of the ball doesn't change and the magnitude of the velocity is also the same.
Momentum can be defined as the product of mass and velocity. It is a vector quantity because velocity is also a vector quantity, and it has magnitude and direction.
Now, the magnitude of momentum will be the same because mass and velocity don't change in magnitude.
The direction of velocity will be reversed. So, the direction of momentum will also be reversed.
Therefore, the correct statement should be "Its magnitude remained the same but its direction changed". Option C is correct.
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Which of the following accurately describes how scientists use models?
A. To make science seem more complex and inaccessible
B. To take measurements of an object, process, or system as it is in
nature
C. To make direct observations of a natural object, process, or
system
D. To represent objects, processes, and systems that are too large,
too small, or too complex to study directly
Answer:
D
Explanation:
To represent objects, processes, and systems that are too large, too small, or too complex to study directly
The correct option is (d) To represent objects, processes, and systems that are too large, too small, or too complex to study directly.
Scientists employ models to comprehend phenomena they are unable to directly observe. Models aid scientists in their understanding of phenomena, no matter how big or little they may be, such as the universe or an atom. Additionally, they can aid in their understanding of systems like weather patterns.In a range of scientific disciplines, from physics and chemistry to ecology and the Earth sciences, scientific models are employed to explain and forecast the behavior of real things or systems.Models can aid in scientific prediction, understanding of processes, and communication of ideas.
The 4 types of scientific models -
Analogies diagrams, Physical replicas, Mathematical representations.Simulations on a computer.Learn more about scientific models brainly.com/question/14250312
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A force of 900 N pushes a wedge 0.10 m into a log. If the work done on the log is 50 J, what is the efficiency of the wedge?
HELPPPP
Answer:
55.56%
Explanation:
We'll begin by calculating the work done in pushing the wedge. This can be obtained as follow:
Force (F) = 900 N
Distance (s) = 0.1 m
Workdone (Wd) =..?
Wd = F × s
Wd = 900 × 0.1
Wd = 90 J
Finally, we shall determine the efficiency. This can be obtained as follow:
Work output = 50 J
Work input = 90 J
Efficiency =?
Efficiency = work output / work input
Efficiency = 50 / 90 × 100
Efficiency = 55.56%
Thus, the efficiency is 55.56%
Why does the plane, tied on a string onto the ceiling, move in a horizontal circle, and why doesn’t the plane move up and down?
Answer:
There’s a tangential velocity and centripetal force. The object moves in a circle because it’s falling towards the center of the circle (point directly under string) but the velocity is such that the object never gets closer to the center
Explanation:
If a ball that is 10 meters above the ground is thrown horizontally at 5.51 meters per second. a. how long will it take for the ball to hit the ground? b. how far will the ball travel in the horizontal direction before it hits the ground?
Answer:
a. t = 1.43 s
b. d = 7.88 m
Explanation:
a. The time of flight can be found using the following equation:
[tex] y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} [/tex]
Where:
[tex]y_{f}[/tex]: is the final height = -10 m
[tex]y_{0}[/tex]: is the initial height = 0
[tex]v_{0_{y}}[/tex]: is the initial speed in the vertical direction = 0
g: is the acceleration due to gravity = 9.81 m/s²
By solving the above equation for "t" we have:
[tex] t = \sqrt{\frac{2y_{f}}{g}} = \sqrt{\frac{2*10 m}{9.81 m/s^{2}}} = 1.43 s [/tex]
Hence, the ball will hit the ground in 1.43 s.
b. The distance in the horizontal direction can be found as follows:
[tex] x_{f} = x_{0} + v_{0}t + \frac{1}{2}at^{2} [/tex]
Where:
x₀: is the initial position in the horizontal direction = 0
a: is the acceleration in the horizontal direction = 0 (it is moving at constant speed)
[tex] x_{f} = 5.51 m/s*1.43 s = 7.88 m [/tex]
Therefore, the ball will travel 7.88 m before it hits the ground.
I hope it helps you!
Explain the difference between velocity and acceleration.
Answer:
velocity has direction and acceleration doesn't
An object in motion stays ___ at a constant ___ and in a straight line.
a. in motion, acceleration
b. in motion, speed
c. at rest, speed
Answer:
Answer is A
Explanation:
the answer is A
Explain in detail what you would experience
throughout the year if the axis of the Earth was not
tilted.
Explanation:
Scientists think an Earth without a tilt would be stratified into climate bands that would get progressively colder as you moved away from the equator. Humans would never survive the continuous winter of the high latitudes, and so we would likely congregate in the planet's tropical midsection.
I hope it's helpful!
A 24 kg object, initially moving at 20 m/s, is slowed by an applied force of 20 N to a final velocity of 16 m/s. How much time did this take?
Answer:
Explanation:
Turtle ba lls
Answer:
4.8 seconds
Explanation:
Ft=change in momentum
Initial momentum=mv=24*20=480 kg*m/s
new momentum=mv=24*16=384 kg*m/s
change in momentum=96 kg*m/s
Ft=change in momentum
20(t)=96
t=4.8 seconds!
How would a weaker jet stream help to cause extreme flooding?(1 point)
Answer:
It would allow storm systems to stall in an area.
Answer: A weaker jet stream would allow storm systems to stall in one area.
A 5 kg object is moving downward at a velocity of 12 m/s and is
currently 2.6 meters above the ground.
calculate its kinetic energy
calculate its potential energy
calculate its mechanical energy
Answer:
the first one i think
Explanation:
What type of tool would best be used to map a section of the ocean floor?
Echo sounding is the key method scientists use to map,uses sound waves bounced off the ocean bottom.
What latitudes experience both summer and winter?
There are only two times of the year when the Earth's axis is tilted neither toward nor away from the sun, resulting in a equal amount of daylight and darkness at all latitudes. These events are referred to as Equinoxes.The word equinox is derived from two Latin words - aequus (equal) and nox (night). At the equator, the sun is directly overhead at noon on these two equinoxes. How do the climatological temperature patterns follow the four seasons? The temperatures are pretty much the same when comparing early winter to late winter and pretty much the same when comparing early summer to late summer. However, late Fall is much colder than early Fall and late Spring is much warmer than early Spring. Why is that? The reason is linked to the changing of the solar sun angle during each season. In the Fall, the sun angle is always getting lower and in the Spring it is always getting higher. From this it would make sense that late Fall is much colder than early Fall and late Spring is much warmer than early Spring. In the winter, the sun angle is INCREASING and in the summer the sun angle is DECREASING. This fact causes temperatures to be pretty much the same when comparing early winter to late winter and pretty much the same when comparing early summer to late summer. The cumulative cooling of the ground and ocean is partially offset by an increasing sun angle in the winter and the cumulative warming of the ground and ocean is partially offset by a decreasing sun angle in the summer. This causes the Spring and Fall seasons to seem much quicker in duration than the Summer and Winter seasons.
I know this is long... but does this help??name one material through which continuous flow of charge can be produced from chemical energy
Answer:
Battery.
Explanation:
A battery is a device that stores chemical energy, and converts it to electricity. This is known as electrochemistry and the system that underpins a battery is called an electrochemical cell. A battery can be made up of one or several (like in Volta's original pile) electrochemical cells
when you blow across the top of a soda bottle, it acts like a closed pipe. If the inside of the bottle is 0.150 m long, what is the fundamental frequency you hear?
(speed of sound=343 m/s)
(unit=hz)
Answer:
The new fundamental frequency will be 598.7Hz. The length of the soda bottle is 0.173 meters. Thus, the new fundamental frequency is 598.7Hz.
Explanation:
Please give me brainlist
Answer:2860 hz
Explanation:
Trust me
Your personal hygiene is more important to avoid you becoming ill, more so than spreading germs.
True
False
Help Easy Question and Brainly. What's the answer?????
Answer:
negatively
Explanation:
Answer:
Negatively charged
Explanation:
PLS ANSWER MY QUESTION TOO
Help pwease and tanks >:|
Answer:
B
Explanation:
Cause I think it is
Which is heavier , a kilogram of lead or a kilogram of a polystyrene beads ?
Answer:
They weight the same, they're both 1 kilogram
The weight of the given objects is the same since they have equal mass.
Weight of object
The weight of an object is the gravitational pull of earth on the object. Weight is vector quantity because it varies from place to place due to difference in acceleration due to gravity.
The weight of 1 kg leadW = mg
W = 1 x 9.8
W = 9.8 N
The weight of 1 kg polystyreneW = mg
W = 1 x 9.8
W = 9.8 N
Thus, the weight of the given objects is the same since they have equal mass.
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How do plants obtain the carbon dioxide required for photosynthesis?
Answer:
Explanation:
Carbon dioxide in photosynthesis Plants get carbon dioxide from the air through their leaves. The carbon dioxide diffuses through small holes in the underside of the leaf called stomata . (singular: stoma. plural: stomata) The lower part of the leaf has loose-fitting cells to allow carbon dioxide to reach the other cells in the leaf.
Answer:
Plants get the carbon dioxide they need from the air through their leaves. It moves by diffusion through small holes in the underside of the leaf called stomata These let carbon dioxide reach the other cells in the leaf, and also let the oxygen produced in photosynthesis leave the leaf easily.
Hope I can help you
Which of these actions would increase heat transfer between two objects?
establishing their thermal equilibrium
increasing the area of their contact
using objects with similar specific heats
reducing the time of their contact
Answer:
b
Explanation:
increasing the area of their contact.
BTS ARMY
Answer: B.) increasing the area of their contact
Explanation: i hope this helps :)
Newton's Laws
Bode made a rocket using an empty plastic bottle and fins made out of cardboard. After partially filling the bottle with water, he
pumps air into the bottle using a pump attached to the rocket with plastic tubes. When the pressure in the bottle becomes high
enough the water gushes out and launches the rocket into the air, as shown in the diagram below.
Rocket
Pressurized Air
Water
Pump
-Launch Tube
Image modified courtesy of NASA
How does the force that causes the water to leave the rocket compare to the force that causes the rocket to launch?
They are ental
Answer:They are equal and act in opposite directions.
Explanation:Newton's third law of motion states that for every action there is an equal and opposite reaction. In the case of Bode's rocket, the pressurized air in the bottle forces the water to gush downward out of the bottle, causing the rocket to launch upward into the air. The force of the water gushing downward is equal to the upward force on the rocket. So, the two forces are equal and act in opposite directions.
The force that causes the water to leave the rocket compared to the force that causes the force to launch is equal but opposite in direction.
What is Newton's law?There is a threes law given by the scientist newton in relation to the motion. The first law tells that if a body is in stop mode, then they become in motion once an external force is applied to them. The second law tells that force is equal to the product of mass and acceleration of the body. The third law tells that if you apply force to an object, then the object also applies force in reaction.
According to Newton's third law, the rocket applies force to the water, then the water also exerts a force on the rocket.
In the instance of Bode's rocket, the bottle's pressured air causes the water to pour out of the bottle downward, which causes the rocket to shoot upward into the air. The upward force on the rocket is equivalent to the force of the water pouring down. Therefore, the two forces are equivalent and exert opposing forces.
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Science Question: why do astronauts wear organge suits vs white suits
Follow answer please...
A liquid has a specific heat of 9 J/g • °C and a solid has a specific heat of 3 J/g • °C. Which
substance, the solid or liquid will heat up faster? Which will cool down faster?
Explanation:
substances have been in direct sunlight for up to 60 minutes. ... cool the fastest? ... 0.60 J/g °C. Match & then label each substance with its specific heat capacity ...
What is the speed of a 180 g ball if its kinetic energy is 100 J?
Answer:
Velocity, V = 33.33 m/s
Explanation:
Given the following data;
Mass = 180grams to kilograms = 180/1000 = 0.18 kg
Kinetic energy = 100J
To find the speed;
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex]
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
Substituting into the equation, we have;
100 = ½*0.18*V²
Cross-multiplying, we have;
200 = 0.18*V²
V² = 200/0.18
V² = 1111.11
Taking the square root of both sides, we have;
Velocity, V = 33.33 m/s
An ohm is best described as a unit of measure for...
A. electrical resistance
B. electrical current
C. electrical potential difference
D. magnetic field strength
A 12 kg object is moving at 10 m/s to the right. It collides with a 20 kg object moving at 7
m/s to the right. What speed will the objects move together after they collide and stick
together?*
a) 5.27 m/s
b) 08.13 m/s
c) 3 m/s
d) 17.23 m/s
Answer:
Change in velocity
−2−10=−12
Time required is 4 seconds
a=Δv/t
=−12/4
=−3m/s²
Hence,
option C is correct answer.
In which beaker were the particles moving the most slowly?
O A. Beaker C: 15°C
B. Beaker D: 18°C
C. Beaker B: 9°C
O D. Beaker A: 3°C
Answer:
It might be wrong but d? i think
Answer:
B. Beaker D: 18°C
Explanation:
Test approved