It's Friday night and Hector has been assigned the noble task of baby-sitting Jacob, his 2-year old brother. He puts a crash helmet on Jacob, places him in
a red wagon and takes him on a stroll through the neighborhood. As Hector starts across the street, he exerts a 58.2 N forward force on the wagon. There
is a 21.3 N resistance force against the wagon (due to friction) and the wagon and Jacob have a combined weight of 317 N. Determine the magnitude of
the net force, the mass of the wagon (with Jacob), and the horizontal acceleration of the wagon. (Note: acceleration due to gravity = 9.81 m/s/s)
Answer:
Explanation:
Net force = Forward push - frictional force
= 58.2 - 21.3 =36.9 N
weight of wagon + jacob = mass x g
317 = mass x 9.81
mass = 317 / 9.81 = 32.35 kg
acceleration of wagon = net force / mass
= 36.9 / 32.35
= 1.14 m /s²
who said an atom is like a ball with no charge?
Answer:
Thomson
Explanation:
Thomson in 1904 soon after the discovery of the electron, but before the discovery of the atomic nucleus, the model tried to explain two properties of atoms then known: that electrons are negatively-charged particles and that atoms have no net electric charge.
Are yall a Furry like me, if so what is you fursoina
Answer:nvm
Explanation:
Answer:
A furry and they cant spell god
Explanation:
!!!!help me asap pls<3
Answer:
lower hill would have more kinetic energy
40 POINTS!
Some kids are playing a game of marbles in which a large marble is flicked at smaller marbles to knock them out of a circle. Assuming that the collisions between the marbles are perfectly elastic, which of the following statements is true when a large marble collides with a smaller marble?
A. Both the kinetic energy and the momentum of the system are conserved.
B. Neither the kinetic energy nor the momentum of the system is conserved.
C. The momentum of the system is conserved, while the kinetic energy of the system is not conserved.
D. The kinetic energy of the system is conserved, while momentum is not conserved.
Both Kinetic energy and momentum of the system are conserved
a 540 kg satellite moves through deep space with a speed of 27m/s. a booster rocket on the satellite fir 1.4 s, giving the force to the satellite the speed if the rocket increase to 31 m/s calculate the force given by the booster rocket to the satellite
Answer:
Force = 1544.4N
Explanation:
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.
Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.
Mathematically, acceleration is given by the equation;
[tex]Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}[/tex]
[tex]a = \frac{v - u}{t}[/tex]
Where;
a is acceleration measured in [tex]ms^{-2}[/tex]v and u is final and initial velocity respectively, measured in [tex]ms^{-1}[/tex]t is time measured in seconds.Given the following data;
Mass, m = 540kg
Initial velocity, u = 27m/s
Final velocity, v = 31m/s
Time, t = 1.4 secs
To find the acceleration:
[tex]a = \frac{31 - 27}{1.4}[/tex]
[tex]a = \frac{4}{1.4}[/tex]
Acceleration, a = 2.86m/s²
Now to find the Force;
Force is given by the multiplication of mass and acceleration.
Mathematically, Force is;
[tex] F = ma[/tex]
Where;
F represents force measured in Newton.m represents the mass of an object measured in kilograms.a represents acceleration measured in meter per seconds square.Substituting into the equation, we have;
[tex] F = 540*2.86[/tex]
Force = 1544.4N
Therefore, the force given by the booster rocket to the satellite is 1544.4 Newton.
how would you find the displacement from t = 0.3 to t = 0.33 under this graph? would it be measured on the time axis?
Answer:
Explanation:
from t = .3 to t = .33 , velocity appears to be uniform .
uniform velocity = .22 m /s
displacement will be area of the v-t graph which is a rectangle .
= .22 x ( .33 - .3 )
= .22 x .03
= 66 x 10⁻⁴ m
= 6.6 mm .
what the difference between heat and temperature
Explanation:
hopefully this helps.
Generally, what happens to the energy from the sun once it passes into the Earth’s atmosphere?
When solar energy reaches the Earth's atmosphere, it undergoes reflection, scattering, absorption, and transmission. Some energy is reflected back into space, some is scattered, and some is absorbed by atmospheric constituents. The absorbed energy heats the atmosphere and drives atmospheric processes, while the transmitted energy reaches the Earth's surface and contributes to heating the land, oceans, and lower atmosphere.
When solar energy reaches the Earth's atmosphere, several processes occur that determine how the energy is distributed and absorbed. Here's an overview of what happens to the energy from the sun once it passes into the Earth's atmosphere:
1. Reflection: A portion of the incoming solar radiation is reflected back into space by clouds, atmospheric particles (aerosols), and the Earth's surface. The reflectivity, or albedo, of different surfaces and atmospheric components determines how much energy is reflected.
2. Scattering: The atmosphere contains molecules and particles that scatter the incoming solar radiation in different directions. This scattering is responsible for the blue color of the sky during the day. While scattering redistributes the energy, it does not change its overall amount.
3. Absorption: Various atmospheric constituents, such as water vapor, ozone, and greenhouse gases like carbon dioxide, absorb specific wavelengths of solar radiation. This absorption leads to an increase in the internal energy of the molecules, heating the atmosphere.
4. Transmission: Some solar energy passes through the atmosphere without being absorbed or scattered. This energy reaches the Earth's surface and can be absorbed by land, water, and vegetation.
The distribution of energy absorption and heating within the atmosphere and at the Earth's surface is influenced by factors such as solar zenith angle (the angle between the sun and the observer's vertical axis), cloud cover, and the composition of the atmosphere.
The absorbed solar energy plays a crucial role in driving atmospheric processes, including the formation of weather systems, circulation patterns, and the hydrological cycle. At the Earth's surface, the absorbed energy contributes to heating the land, oceans, and the lower atmosphere. This absorbed energy is eventually released back into the atmosphere through processes like evaporation, conduction, and convection, influencing weather patterns and climate.
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PLZ HELP!!!!!!!!!!!!!
Answer:
The answer is D
Explanation:
Because the car is accelerating (moving) south at a speed of 45. Hope this helps for you. :)
A person weighs 167 lb. The acceleration of gravity is 9.8 m/s 2 . Determine her weight in newtons and her mass in kilograms
Explanation:
Weight (N) = Mass * Acceleration
75.74 kg = Mass * 9.8 m/sec^2
Mass = 7.72 kg
Weight = 75.74 N
Considering the change of units and the definition of weightm the weight is 742.8494 N and the mass is 75.80kg
On one side, 1 lb equals 4.4482 Newtons. So, to determine the weight in Newtons you can apply the following rule of three: if 1 lb equals 4.4482 Newtons, 167 lb equals what amount in Newtons?
[tex]weight=\frac{167 lbx 4.4482 Newtons}{1 lb}[/tex]
weight= 742.8494 N
On the other side, mass is the amount of matter that a body contains and weight is the action exerted by the force of gravity on the body.
The mass of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.
Weight is calculated as the product of the object's mass and the value of the gravitational acceleration:
W= m×g
In this case, you know:
W=742.8494 Ng= 9.8 m/s²Then:
742.8494 N= m× 9.8 m/s²
Solving:
m=742.8494 N÷ 9.8 m/s²
m= 75.80 kg
Finally, the weight is 742.8494 N and the mass is 75.80kg
Learn more:
https://brainly.com/question/15566515?referrer=searchResultshttps://brainly.com/question/15271930?referrer=searchResultshttps://brainly.com/question/4735812?referrer=searchResultsCaregivers should begin reading to children:
When they are babies.
When they can talk.
When they show an interest.
When they are two.
When they are preschoolers.
Answer:
When they are babies. to get them familar with it
Explanation:
Pls choose brainliest.
Answer:
When they are babies
Explanation:
Because they could hear the words and laern them.
At a specific location, a 25.0-kg mass has a weight of 40.5 newtons. What is the acceleration due to gravity at this location?
A.) 0.617 m/s2
B.) 1.62 m/s2
C.) 9.81 m/s2
D.) 1010 m/s2
Answer:
The answer is option AExplanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the Force
m is the mass
From the question we have
[tex]a = \frac{25}{40.5} \\ = 0.617283950...[/tex]
We have the final answer as
0.617 m/s²Hope this helps you
PLEASE HELPPP ASAP !!!!!!!!!!!!
Answer:
The answer would be the last option (the one with the arrow pointing sideways)
Explanation:
The arrow lost it's acceleration and is starting to go downwards but it isn't a straight slope down
Determine the acceleration of a boat with a final speed of 120 m/s after 30 seconds.
Answer:
ehehehshehehehhehesh
Explanation:
ehehehehheheheeheh
How much net force must Mrs. McD’s 30,000 kg jet plane develop to achieve an acceleration of 1.5 m/s2?
Answer:
F = 45000 [N]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration.
ΣF = m*a
Where:
F = force [N] (units of Newtons)
m = mass = 30000 [kg]
a = acceleration = 1.5 [m/s²]
[tex]F = 30000*1.5\\F = 45000 [N][/tex]
give some names of vector quantities?
Answer:
In contrast to vectors, ordinary quantities that have a magnitude but not a direction are called scalars. For example, displacement, velocity, and acceleration are vector quantities, while speed (the magnitude of velocity), time, and mass are scalars.
What is diffusion in flower plant
Answer:
drop of food coloring in a glass of watercolors the water through diffusion. ... At night, however, the stomata simply remain open and CO2 enters the plant through diffusion. Flower Feathers
Explanation:
Cells are the basic building block that makes up all living things. Cells are microscopic. What does this mean?
Answer:
microscopic means that they are very very tiny, you cannot see them with the human eye, you have to use a tool like a microscope
Explanation:
All things are made of cells or are a cell, and they are microscopic meaning you can't see them with only the human eye.
What is muscle memory?
five or more sentences.
Answer:
Muscle memory is a form of procedural memory that involves consolidating a specific motor task into memory through repetition. This has been used synonymously with motor learning. These motions become instinctive, something we do without planning. This allows us to move and play smarter and faster over time. Muscle memory really has to do with the nerves that communicate with the muscle to allow them to move in the proper sequences for certain movements.
If the mass of each object is the same, 18 g, which object will have the largest density? *
When representing waves in two dimensions, a ray can be drawn parallel to the crests of the waves
True False
Answer:
I think its true
Explanation: hope it helps
Which refers to the rate of change in velocity?
speed
O acceleration
O direction
O magnitude
3. As the ice melts into liquid water, what happens to the kinetic energy of the particles in the sample?
4. How does the kinetic energy of the particles in the sample relate to the sample’s temperature?
Answer:
As ice melts into water, kinetic energy is being added to the particles. This causes them to be 'excited' and they break the bonds that hold them together as a solid, resulting in a change of state: solid -> liquid.
Explanation:
As the ice melts into liquid water, the kinetic energy of the particles in the sample increase. The temperature of the sample is directly proportional to the kinetic energy of the particle.
What is Kinetic energy?The kinetic energy of an object is the energy which it possesses due to the motion of the object. Kinetic energy is defined as the work which is needed to accelerate a body of a given mass from the rest position to its stated velocity. The body of an object maintains the same amount of kinetic energy which it gained during its acceleration unless its speed changes.
The temperature is directly proportional to the kinetic energy of the object. As the temperature of the object increases the phase of the object changes from solid to liquid.
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Can anyone please help me put
Answer:
Bulb a
Explanation:
Babies typically say their first words:
Around six months old.
Between six months and one year old.
Around one year old.
Between one year and 18 months old.
Between 18 months and 24 months old.
Answer:
2nd one if you ask me
almost every baby stats to talk after their a year old
An initially stationary object experiences an acceleration of 6 m/s2 for a time of 15 s. How far will it travel during that time?
But use this formula with the steps: x = xo + vo t + ½ a t 2
Answer:
675m
Explanation:
Given parameters:
Initial velocity = 0m/s
Acceleration = 6m/s²
Time = 15s
Unknown:
Distance traveled by the body = ?
Solution:
To solve this problem; we use the expression;
S = ut + [tex]\frac{1}{2}[/tex]at²
Where u is the initial velocity
t is the time
a is the temperature
Insert the parameters and solve;
S = 0 x 15 + [tex]\frac{1}{2}[/tex] x 6 x 15²
S = 675m
A force of 8.00 newtons acts on a block across a horizontal frictionless surface for 12.0
seconds.
The block travels 4.00 meters. What is the change in kinetic energy during these 12.0
seconds?
The required value of the change in kinetic energy during the given time interval is 32 J.
Given data:
The magnitude of force is, F = 8.00 N.
The time interval is, t = 12.0 s.
The distance covered by the block is, s = 4.00 m.
Here we can easily obtain the required result by applying the Work - Energy theorem. As per the work - energy theorem, the work done due to the applied force is equal to the change in kinetic energy.
Therefore,
W = ΔKE
And the work done is, W = Fs.
F× s = ΔKE
8.00 × 4.00 = ΔKE
ΔKE = 32 J
Thus, we can conclude that the required value of the change in kinetic energy during the given time interval is 32 J.
Learn more about the work energy theorem here:
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HELP!! An illustration of a pendulum at 3 positions of a pendulum. The equilibrium position is labeled B. The other two positions are the maximum displacement of the pendulum labeled A and C. In between A and B are 3 lighter colored pendulum sketches equally spaced. In between B and C are 3 lighter colored pendulum sketches equally spaced.
At which point(s) does the pendulum have the greatest potential energy?
A only
B only
C only
both A and C
Answer
the answer is A and c
Explanation:
i got it right on edge
Answer:
Both A and C is correct
Explanation:
8. What is the yellow powder in plants that contains sperm cells called?
c. seed coat
a. pollen
d. conifer
b. embryo
Answer:
Its called pollen. Pollen is a powdery substance consisting of pollen grains which are male microgametophytes of seed plants, which produce male gametes (sperm cells).
Hope this helps, have a great day/night and stay safe!
