Simple!
Depending on the subject, if it's Microsoft drawing, say "It's the same way" but if it's with coding, that is a whole other can of worms
a criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 5.3 m/sec, hoping to land on the roof of an adjacent building. the horizontal distance between the two buildings is d, and the roof the adjacent building is 2.0 m below the jumping-off point. find the maximum value of d.
A criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 5.3 m/sec, hoping to land on the roof of an adjacent building. The maximum horizontal distance that the criminal can jump is approximately 1.077 meters.
We can use the equations of motion to solve this problem. Let's assume that the criminal jumps off the roof at time t=0.
In the horizontal direction, there is no acceleration, so the distance traveled is given by
d = vx*t
Where vx is the horizontal velocity (5.3 m/s) and t is the time of flight.
In the vertical direction, we can use the equation
y = y0 + vyt + 1/2a*\(t^{2}\)
Where y is the vertical displacement (negative because the roof of the adjacent building is below the jumping-off point), y0 is the initial height (0 m), vy is the vertical velocity (0 m/s), a is the acceleration due to gravity (-9.8 m/\(s^{2}\)), and t is the time of flight.
We can solve for t by setting y equal to -2.0 m
-2.0 m = 0 + 0t - 1/29.8*\(t^{2}\)
Solving for t, we get
t = \(\sqrt{0.4/4.9}\) = 0.203 s
Now we can substitute this value of t into the equation for d
d = 5.3 m/s * 0.203 s = 1.077 m
Therefore, the maximum horizontal distance that the criminal can jump is approximately 1.077 meters.
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.Choose the best answer to the following:
Pumice is a volcanic rock that floats in water. The density of pumice compared with water is
(a) less.
(b) equal.
(c) more.
(d) none, for it sinks.
The correct answer is (a) less.
The correct answer is (a) less. Pumice is a type of volcanic rock that is formed when volcanic gases are rapidly released from molten lava, resulting in a frothy, porous texture.
The porosity and low density of pumice give it the ability to float in water, unlike most other types of rock.
Density is a measure of how much mass is contained within a given volume of a substance. It is calculated by dividing the mass of an object by its volume. For example, the density of water is about 1 gram per cubic centimeter (g/cm3).
The density of pumice, on the other hand, is much lower than that of water. Depending on the specific type of pumice, its density can range from about 0.25 to 0.65 g/cm3, which is much less than the density of water. This is why pumice can float on the surface of water.
It's important to note that density is a property of matter that can vary depending on temperature, pressure, and other factors. However, in general, the density of pumice is much less than that of water, which allows it to float and makes it useful for a variety of industrial and horticultural applications.
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What is a DNA fingerprint? (FORENSICS)
Answer:
here you go. My dad is a docter
Explanation:
DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation. A DNA sample taken from a crime scene is compared with a DNA sample from a suspect. ... DNA fingerprinting is also used to establish paternity.
A man lifts a 5 Newton bag of groceries
from the floor to the top of the countertop,
which is 1.1 meters tall. What is the work
done by this person in lifting groceries?
5
5.5
4.5
6
Answer:
5.5 J
Explanation:
W=F*D=5*1.1=5.5 J
aaaaaaaaaaaaaaaaaa pls help
Answer:
a. is correct answer dear
Pablo lifts a bag of flour 0.8 m from the floor to a table. He lifted the bag using a force of 20 N. How much work did Pablo do on the bag of flour?
The amount of work done by Pablo is 16 J.
Work done problemThe work done by Pablo on the bag of flour is given by the formula:
work = force x distance x cos(theta)
where force is the magnitude of the force applied, distance is the distance moved by the object, and theta is the angle between the direction of the force and the direction of the displacement. In this case, the angle between the direction of the force and the direction of the displacement is 0 degrees (since Pablo lifted the bag straight up), so cos(theta) = 1. Substituting the given values, we get:
work = 20 N x 0.8 m x 1 = 16 J
Therefore, Pablo did 16 J of work on the bag of flour.
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with no friction, does the final speed depend on the mass of the car?
In physics, the final speed of an object in freefall (with no friction) depends only on the initial height from which it falls and the acceleration due to gravity, not on its mass.
According to the equation of motion, the final velocity of an object in freefall is given by v = sqrt(2gh), where v is the final velocity, g is the acceleration due to gravity (approximately 9.8 m/s^2 on the Earth's surface), and h is the initial height.
In this scenario, all objects, regardless of their mass, will reach the same final velocity if they are dropped from the same height. This is because the force of gravity acting on an object is proportional to its mass, but the acceleration due to gravity is the same for all objects. So, the final velocity of an object in freefall is not affected by its mass.
It's important to note that this is true only in the absence of friction and air resistance. In real-world scenarios, friction and air resistance can affect the final velocity of an object, and the mass of an object can affect its final velocity to some extent through air resistance
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What is the density of a 500 g rectangle block with the following dimensions: Length = 8.0 cm, Width = 6.0 cm,
and Height = 5.0 cm. I
Explanation:
Density = mass / volume
ρ = (500 g) / (8.0 cm × 6.0 cm × 5.0 cm)
ρ = 2.1 g/cm³
The volume of the block the product of its dimensions that is 240 cm³. Then density of the block weighing 500 g is 2.08 g/ cm³.
What is density ?Density of a substance is the measure of its mass per unit volume. It describes how closely its particles are packed within a given volume. It is the ratio of mass to the volume.
Volume of an object is the space occupied by the object. For a rectangle block, volume is the product of length, width and height.
Given, l = 8 cm
width = 6 cm
h = 5 cm
volume = l w h = 6 cm × 5 cm × 8 cm = 240 cm³
Mass of the block = 500 g
density = mass/ volume
d = 500 g/240 cm³
= 2.08 g/cm³
Therefore, the density of rectangular block is 2.08 g/cm³.
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An object weighs 100 newtons on earth.What is its weight on the moon?
Answer:
a) The gravitational acceleration at the surface of the Moon is g moon=1.67 m/s
2
The ratio of weights (for a given mass ) is the ratio of g-values, so
W
moon
=(100N)(1.67/9.8)=17N.
(b) For the force on that object caused by Earth's gravity to equal 17 N, then the free fall acceleration at its location must be
ag
=1.67m/s
2
. Thus , .
ag
= r 2
Gm
E
⇒
a
g
Gm
=1.5×10
7
m
So the object would need to be a distance of r/R
E
=2.4 "radii" from Earth's center.
Answer:
20 N
Explanation:
Consider that earth's acceleration due to gravity is approximately 9.81 m/s^2. Also consider that the moon's acceleration due to gravity is about 1.62 m/s^2. Using these two values, we can easily find the weight of the object on the moon, given that the object weighs 100 N, and that F = ma.
First, let's break it up.
100/9.81 =
10.193679918450561 kg
10.193679918450561*1.62 =
16.513761467889908 N
≈ 20 N (with one significant digit, since that is the least amount of sig figs in the problem)
plastic straws that quickly biodegrade in the ocean? not quite, scientists say
According to my knowledge cutoff in September 2021, there have been efforts to develop plastic straws that biodegrade more quickly in the environment, including the ocean.
However, it is important to note that the biodegradation of plastics in marine environments is a complex issue, and there is no perfect solution yet.Traditional plastic straws are typically made from petroleum-based polymers, such as polypropylene or polyethylene, which are designed to be durable and have a long lifespan. These types of plastics do not readily biodegrade in natural environments, including the ocean. Instead, they break down into smaller fragments known as microplastics, which can persist in the environment for hundreds of years.
Some companies have developed alternative materials for straws, such as biodegradable or compostable plastics made from plant-based sources like cornstarch or polylactic acid (PLA). These materials are designed to break down more quickly under specific conditions, such as in industrial composting facilities. However, their performance in marine environments is still a subject of study and debate.
Researchers have found that even some so-called "biodegradable" plastics may degrade slowly or not at all in marine environments, due to factors like low oxygen levels, low temperatures, and limited microbial activity. Additionally, even if a straw were to biodegrade quickly, it would still contribute to the pollution problem until it breaks down completely.
While developing more environmentally friendly alternatives to plastic straws is important, it is crucial to focus on reducing overall plastic consumption and promoting recycling. Reusable straws made from materials like stainless steel, glass, or bamboo are also sustainable options that can help reduce plastic waste.
It's worth mentioning that there may have been advancements in this field since my last update. I recommend checking the latest scientific research and developments for the most up-to-date information on biodegradable straws and their performance in marine environments.
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021 (part 2 of 3) 10.0 points Determine how long the ski jumper is air- borne. Answer in units of s.
Answer:
t = 10.82 s
Explanation:
Using the formula, t = (d·cosθ)/(ν\(\\ ox\\\))
t = \(\frac{343.50cos55}{26}\)
t=10.82 s
A 50 kg circus worker stands on a merry go round platform. If the worker's acceleration is 2.5 m/s2, what is her centripetal force?
F = ma
= 50kg × 2.5 m/s²
= 125 N
Answer : 125N
Explanation :
F = Force (N)
m = mass (kg)
a = acceleration (m/s²)
A hollow tennis ball and a solid steel ball of the same diameter are dropped at the same time. Which ball has the greater force acting on it
Answer:
the solid steel ball...more mass more weight more gravity
Explanation:
Answer:
Solid steel ball. It has more mass therefore more force will be acting on it.
Explanation:
3 paragraphs about who Larry page was and what advancements he provided to the world
Larry Page, real name Lawrence Edward Page, is a computer scientist and entrepreneur from the United States who co-founded Goo-gle, one of the most well-known websites on the Internet, with Sergey Brin on March 26, 1973 in East Lansing, Michigan.
Larry Page was drawn to technology at a young age and worked toward his goals. His success is truly inspirational. In the dorms of their college, he and Sergey Brin founded Goo-gle and grew it into a multinational corporation. Working hard is the secret to success.The concept of deciphering the vast amount of data amassing on the Internet interested Brin and Page, who first met while graduate students at Stanford University. They started developing Backrub, an innovative form of search technology, from Page's dorm room at Stanford. a week ago.To know more about Larry Page
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if and objent with the mass to 100 kg and the lenght of 3.8 meters, a person weight 50 kg walks to the front to the boat how far did the boat travel
m = the object's mass; g = the local gravity (for example, the standard planet acceleration or f 0 = 9.80665ms-2) Weight of the Object. Enter the object's mass in this field.
What does Earth's gravity on average weigh?
gravitation on Earth. According to Newton's universal laws of gravitation, the gravitational force on Earth is the result (vector sum) of 2 factors: (a) the gravitational pull and (b) the gravitational forces.
Describe zero gravity.
all videos related to this post A description of gravity with an emphasis on zero gravity In mechanics, gravity—also known as gravitation—is the constant force of attraction that pulls all things together. By far, it is the
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The seed planted at extreme cold or in the region of frozen ice do not germinate, why?
Answer:
yes
The the seed planted at Extreme cold or in the region of frozen I did not germinate because the amount of moisture of the seed is too high which results in lack of air of the sea in the frozen ice
In fact, a soil temperature below 50°F might be problematic for many garden plants. Seeds will quickly absorb water at 40°C, but they won't begin to grow. This presents a risk for rot and disease, which may cause damping-off or subpar growth.
What is germination of seed?The formation of the seedling is the consequence of germination, which is often the growth of a plant inside a seed. It is also the process of the seed's metabolic machinery being reactivated, which causes the radicle and plumule to emerge. A vascular plant's seed is a little bundle that develops in a fruit or cone as the result of the union of the male and female reproductive cells.
Given the need for particular internal or external stimuli to resume growth, dormant seeds are viable seeds that do not germinate. When the right circumstances are present, the seed starts to germinate and the embryo starts to grow again, eventually becoming a seedling.
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A particular star's spectrum shows the same hydrogen line at a wavelength of 486.0 nm. what can we conclude?
We can conclude that The star is moving toward us; shift to a shorter wavelength.
The transfer of an electron to a higher energy level, such as n = 1 or n = 2, occurs when a hydrogen atom absorbs a photon. The Balmer series refers to this group of hydrogen emission spectra.
The phrase "blueshift" describes how light waves change as an object approaches toward us in space, shifting wavelengths toward the blue end of the spectrum. Change to a shorter wavelength when the star approaches us. A shorter wavelength indicates a blueshift (shift to the blue end of the spectrum), which indicates that the object is travelling in our direction.
Therefore, We can conclude that The star is moving toward us; shift to a shorter wavelength.
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PHYSICS GIVING LOTS OF POINTS!!! 100
The number of protons in the nucleus of an atom determines the species of the atom, i.e., the element to which the atom belongs. An atom has the same number of protons and neutrons. But the electron number cannot be used instead because
electrons are not within the nucleus
electrons are negatively charged
electrons can be removed from or added to an atom
electrons are lighter than protons
Answer:
electrons can be removed or added creating ions of the element
Explanation:
determine the equilibrium temperature distribution in a rod with convective heat losses
To determine the equilibrium temperature distribution in a rod with convective heat losses, the following steps should be followed:
Step 1: Derive the heat equation: ∂T/∂t = a ∂²T/∂x², where T is temperature, x is the spatial coordinate, a is the thermal diffusivity of the rod, and t is time.
Step 2: Solve the differential equation to get T(x,t).
Step 3: Apply boundary conditions at
x=0 and x=L.
It is assumed that heat is lost by convection, which means that the rate of heat loss is proportional to the temperature difference between the rod and the surrounding medium:
k(T-T∞),
where k is the heat transfer coefficient and T∞ is the temperature of the surrounding medium. Therefore, the boundary conditions are given by:-k(T(0,t)-T∞) = h(T(0,t)-T∞), where h is the convective heat transfer coefficient at
x=0.-k(T(L,t)-T∞) = h(T(L,t)-T∞), where h is the convective heat transfer coefficient at x=L.
Step 4: Solve the boundary conditions to get the constants of integration.
Step 5: Substitute the constants of integration into the general solution of the differential equation to get the temperature distribution T(x,t).
Step 6: Take the limit as t→∞ to get the equilibrium temperature distribution T_eq(x). The equilibrium temperature distribution is the temperature distribution that does not change with time, i.e., it is the steady-state temperature distribution.
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what is the translational speed of the boulder when it reaches the bottom of the hill?
The translational speed of the boulder when it reaches the bottom of the hill is v = √(2 * g * h).
To determine the translational speed of a boulder when it reaches the bottom of a hill, we need to consider the conservation of energy. Assuming there is no significant air resistance or other external forces, we can equate the potential energy at the top of the hill to the kinetic energy at the bottom.
The potential energy (PE) of an object at a certain height is given by the formula:
PE = m * g * h
where m is the mass of the boulder, g is the acceleration due to gravity (approximately 9.8 m/s² on Earth), and h is the height of the hill.
The kinetic energy (KE) of an object is given by the formula:
KE = (1/2) * m * v²
where v is the translational speed of the boulder at the bottom of the hill.
Since energy is conserved, we can equate the potential energy at the top of the hill to the kinetic energy at the bottom:
m * g * h = (1/2) * m * v²
Canceling out the mass (m) from both sides, we get:
g * h = (1/2) * v²
Rearranging the equation, we find:
v² = 2 * g * h
Finally, taking the square root of both sides, we obtain the equation for the translational speed (v):
v = √(2 * g * h)
By plugging in the values of the acceleration due to gravity (g) and the height of the hill (h), you can calculate the translational speed of the boulder at the bottom of the hill using this equation.
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please help !! After the collision, the two cars stick together. Find the final velocity of the two cars.
After the collision, the two cars stick together. Find the final velocity of the two cars would be 0.667 meters per second as per the conservation of the momentum after the collision.
What is elastic collision?
It is the type of collision in which the total momentum as well as the kinetic energy on the system is conserved.
As given in the problem we have to find the velocity of the two cars if, after the collision, the two cars stick together,
As per the conservation of the momentum,
The total initial momentum of the cars before the collision = The total final momentum of the cars after the collision
1 × 2 + 2 × 0 = ( 1 + 2 ) × V
2 + 0 = 3 × V
V = 2 / 3
V = 0.667 meters per second
Thus, after the collision, the two cars stick together, then the final velocity of the two cars would be 0.667 meters per second
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What is the specific heat capacity of a material if 2000 J of heat energy can raise the temperature of 10 g of it by 140°C?
Answer:
Specific heat capacity, = 1.43 J/g°C
Explanation:
Given the following data;
Mass = 10 g
Change in temperature = 140°C
Quantity of heat = 2000 J
To find the specific heat capacity;
Heat capacity is given by the formula;
\( Q = mcdt\)
Where;
Q represents the heat capacity or quantity of heat. m represents the mass of an object. c represents the specific heat capacity of water. dt represents the change in temperature.Making c the subject of formula, we have;
\( c = \frac {Q}{mdt} \)
Substituting into the equation, we have;
\( c = \frac {2000}{10*140} \)
\( c = \frac {2000}{1400} \)
Specific heat capacity, = 1.43 J/g°C
An LC Circuit is built with a 20 mH inductor and an 8.0 pF capacitor. The capacitor voltage has its maximum value of 25 V at t = 0s. a) How long is it until the capacitor is first fully discharged? b) What is the inductor current at that time? PLEASE SHOW ALL WORK
A) It takes 2.22 × 10^-6 s until the capacitor is fully discharged.
B) The inductor current at that time is 2.31 × 10^-4 A.
Explanation:-
An LC circuit is built with a 20 mH inductor and an 8.0 pF capacitor.
The capacitor voltage has its maximum value of 25 V at t = 0s, and you need to determine the following:
A)The circuit's resonant frequency, f0 can be calculated by using the following equation:
f0 = 1/2π√LC
Where, L = 20 mH = 20 × 10^-3 H and C = 8.0 pF = 8 × 10^-12 F.
So, f0 = 1/2π√(20 × 10^-3)(8 × 10^-12)
= 1/2π√160 × 10^-15
= 1/2π(4 × 10^-8)
= 1/8π × 10^-8
= 3.98 × 10^6 Hz.
A time constant is given by
τ = 1/2πf0 = 1/2π × 3.98 × 10^6 = 3.98 × 10^-7 s.
The capacitor voltage falls to 0.5 the maximum value in one time constant τ, which is equal to 3.98 × 10^-7 s.
Hence, the time it takes for the capacitor to be fully discharged, tc can be calculated as follows:
ln(V0/Vc) = - tc/τ
Where, V0 is the maximum voltage, Vc is the voltage when the capacitor is fully discharged, τ is the time constant, and tc is the time to fully discharge Vc.
Rearranging the equation gives:
tc = - τ ln(Vc/V0) = - (3.98 × 10^-7) ln(0.5/25)
= 2.22 × 10^-6 s.
B) The current through an LC circuit is given by:
i = Io e-t/τsin(2πft)where i is the current, Io is the initial current, t is the time, τ is the time constant, and f is the frequency.
The current through the inductor is at its maximum value when the capacitor is fully discharged. When the capacitor voltage is maximum, the current through the inductor is zero.The initial current Io can be calculated from the maximum voltage of the capacitor and the capacitive reactance as follows:
Io = Vc/Xc
where, Vc is the maximum voltage of the capacitor and Xc is the capacitive reactance.
Xc can be calculated from the capacitive reactance equation:
Xc = 1/2πf0C = 1/2π(3.98 × 10^6)(8 × 10^-12) = 4.98 × 10^5 Ω
Substituting values,
Io = 25/4.98 × 10^5 = 5.02 × 10^-5 A
Therefore, the current through the inductor when the capacitor is fully discharged is given by:
i = Io e-t/τsin(2πft)
i = 5.02 × 10^-5 e-2.22 × 10^-6/3.98 × 10^-7 sin(2π(3.98 × 10^6)(2.22 × 10^-6))i
= 2.31 × 10^-4 A (rounded to three significant figures).
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At the end of 3N force acts on the object during time interval of 1.5seconds with force acting towards right. A constant force of 4N to left is applied for 3seconds. What is the velocity at the end of the 3seconds ?
Answer:
v_f = -7.5 m / s
Explanation:
Let's analyze this exercise a little, two forces that act on a body for different time intervals are indicated, each force creates an impulse and since this is a vector quantity we must add in the form of vectors. The net momentum is
we assume that the direction to the right is positive
I = I₁ + I₂
I = F₁ Δt₁ - F₂ Δt₂
I = 3 1.5 - 4 3
I = -7.5 N s
now let's use the relationship between momentum and momentum, suppose the object starts from rest (vo = 0)
I = Δp
I = m (v_f - v₀)
v_f = I / m
v_f = -7.5 / m
to finish the calculation we must assume a mass m = 1 kg
v_f = -7.5 m / s
the negative sign in the body is moving to the left
a 500.0 lb man is crossing the street when the brakes on 454.5 kg car fail and she hits the gorilla head on at 50.0 mph. if the collision is perfectly inelastic, at what speed will the car and the gorilla travel after the collision?
If the collision is perfectly inelastic, the speed of the car and the gorilla travel after the collision is 14.9m/s.
Perfectly inelastic collision, also known as completely inelastic collision is one in which the maximum amount of kinetic energy has been lost during a collision, making it the most extreme case of an inelastic collision.
From the question given
mass of gorilla man, m = 500lb - 500 * 0.4536 = 226.8kg
Initial speed of the car, u = 50mph = 50 * 0.447 = 22.35 m/s
mass of the car, M = 454.5kg
applying conservation of momentum formula :
(m + M) * V = M * u
(226.8 + 454.5) * V = 454.5 * 22.35
681.3V = 10,158.075
V = 14.9m/s
Therefore, the speed of the car and the gorilla travel after the collision is 14.9 m/s.
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Which statement describes a planet as it moves along its orbit?
It travels slowest but experiences a stronger gravitational pull when it is farthest from the sun.
It travels fastest and experiences a stronger gravitational pull when it is closest to the sun.
It travels fastest and experiences a stronger gravitational pull when it is farthest from the sun.
It travels slowest but experiences a stronger gravitational pull when it is closest to the sun.
The statement that describes a planet as it moves along its orbit is option D: It travels slowest but experiences a stronger gravitational pull when it is closest to the sun.
What is planet movement about?The above option is chosen because a planet's speed and the strength of the gravitational force acting on it are determined by the distance between the planet and the sun.
The planet's speed is determined by the balance between the sun's gravitational pull and the planet's inertia, or tendency to continue moving in a straight line. When the planet is closer to the sun, the sun's gravitational pull is stronger, which causes the planet to slow down.
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A 1,500 kg car is traveling at 25 m/s. The driver suddenly applies the brakes causing the car to skids to a stop. If the average braking force between the tires and the road is 7,100 N, how far does the car slide before it comes to rest?
By Newton's second law, the car slows down with an average acceleration a such that
-7100 N = (1500 kg) a ⇒ a ≈ -4.7 m/s²
If we treat the car as accelerating uniformly with this magnitude, then the car slides a distance ∆x such that
0² - (25 m/s)² = 2a ∆x ⇒ ∆x ≈ 66 m
The car slide before it comes to rest will be 66 m. Newton's second equation of motion is applied in this problem.
What is force?Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body.
Force is defined as the product of mass and acceleration. Its unit is Newton.
The acceleration is found as;
F=ma
-7100 N = (1500 kg) a
a= -4.7 m/s²
If we assume that the automobile accelerates uniformly with this magnitude, the car slides x distance. From the Newton's second equation of motion;
v²=u²+2as
v²-u²=2as
0² - (25 m/s)² =2×(-4.7) s
s=66 m
Hence,the car slide before it comes to rest will be 66 m.
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a tug-of-war that results in one team pulling the other across the line is an example of
A tug-of-war that results in one team pulling the other across the line is an example of reaction force.
What is reaction force?A reaction force can be described as the consequence of an action force which is opposite in direction.
It should be noted that the Newton's third law of motion is the one that deals with these two forces, which can be considered as the action and reaction forces however the Newton's third law made us to understand that for every action, there is an equal and opposite reaction, hence the case above can be seen as an example of reaction force.
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How dose a scientific theory differ from a hypothesis?
Answer:This is the Difference Between a Hypothesis and a Theory. ... In scientific reasoning, a hypothesis is an assumption made before any research has been completed for the sake of testing. A theory on the other hand is a principle set to explain phenomena already supported by data.
Explanation:
How many atoms of sodium do you have if you have one mole of sodium?
Answer:
multiply the number of moles of Na by the conversion factor 6.02214179×1023 atoms Na/ 1 mol Na, with 6.02214179×1023 atoms being the number of atoms in one mole of Na (Avogadro's constant), which then allows the cancelation of moles, leaving the number of atoms of Na.
Answer:
the answer is
6.022×10²³ na...