Answer:
Explanation:
You can approach an expression for the instantaneous velocity at any point on the path by taking the limit as the time interval gets smaller and smaller. Such a limiting process is called a derivative and the instantaneous velocity can be defined as.#3
For the special case of straight line motion in the x direction, the average velocity takes the form: If the beginning and ending velocities for this motion are known, and the acceleration is constant, the average velocity can also be expressed as For this special case, these expressions give the same result. Example for non-constant acceleration#1
Which is an example of the law of inertia?
A. A rocket taking off from earth
B. A crash dummy flies through a windshield in a collision
C. A small rock skips on a pond faster than a small rock
Answer:
B
Explanation:
Law of Inertia states, a body stays in rest or motion unless an ouside force causes change.
what is the function of a switch? pls HELPPPPPP TYSMMMMM <3
Answer:
Connect multiple hosts: Normally, a switch provides a large number of ports for cable connections, allowing for star topology routing. It is usually used to connect multiple PCs to the network. Forwards a message to a specific host: Like a bridge, a switch uses the same forwarding or filtering logic on each port. When any host on the network or a switch sends a message to another host on the same network or the same switch, the switch receives and decodes the frames to read the physical (MAC) address portion of the message. Manage traffic: A switch in networking can manage traffic either coming into or exiting the network and can connect devices like computers and access points with ease. Keep electrical signal undistorted: When a switch forwards a frame, it regenerates an undistorted square electrical signal. Increase LAN bandwidth: A switch divides a LAN into multiple collision domains with independent broadband, thus greatly increasing the bandwidth of the LAN.
Explanation:
Explanation:
The function of the switch is
Switch is a device used for making and breaking electric current through the circuit.A 50 kg sign has been hung from two vertical ropes. What is the tension in each rope?
(show work)
Answer:
Tension is 25 N in both ropes.
T1 = 25 N
T2 = 25 N
Explanation:
We are told that the 50 kg sign has been hung from two vertical ropes.
Now, from equilibrium of forces, since the ropes are vertical, the total tension of both ropes must equal the weight of the sign.
Let the tension in both ropes be T1 and T2.
Thus;
T1 + T2 = 50
Now, since the angles are vertical, the angle with the horizontal axis will be 90°.
Resolving along the horizontal axis gives;
T1 cos 90 = T2 cos 90
This means that T1 = T2.
Thus;
Since T1 + T2 = 50, if means that; T1 = T2 = 50/2 = 25 N
Julie and Ashwin were doing an experiment in the classroom. They
each had to move a 15 kg box. Julie was able to move her box, but
Ashwin was only able to move his after removing half the items in the
box. Which is true regarding the force he applies after removing the
items from the box?
A. He has to apply the same amount of force to the box to overcome gravity.
B. He has to apply less force to lift the box because the mass has decreased.
C. He has to apply a different type of force of the changing the mass.
D. He has to apply more force to lift the box because the mass is greater
Please answer ASAP
Julie and Ashwin were doing an experiment in the classroom. They each had to move a 15 kg box. Julie was able to move her box, but Ashwin was only able to move his after removing half the items in the box. The true statement is Ashwin has to apply less force to lift the box because the mass has decreased.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
The equation for force is
F=ma
If m is decreased by half, then f decreases as well. It takes less force to push a lighter object across the floor. Ashwin has to apply less force to lift the box because the mass has decreased.
True regarding the force he has to apply less force to lift the box because the mass has decreased
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When the velocity of an object is tripled, by what factor is its momentum changed ?
Answer:
also tripled, factor of 3
Explanation:
equation of momentum is p = m * v , where p=momentum, m=mass, and v=velocity
if m is unchanged
p1 = m1 *v1
p2 = m2 *v2
m1 = m2 and v2 = 3*v1
p2 = m1 * 3v1 = 3*p1, tripled momentum
While eating lunch high up in a skyscraper, two construction workers calculate their gravitational potential
energies, and find them to be equal. If the lighter construction worker has a mass of 90kg, and the other worker
is twice as high up in the skyscraper, what is the mass of the other worker?
Answer:
The mass of the other worker is 45 kg
Explanation:
The given parameters are;
The gravitational potential energy of one construction worker = The gravitational potential energy of the other construction worker
The mass of the lighter construction worker, m₁ = 90 kg
The height level of the lighter construction worker's location = h₁
The height level of the other construction worker's location = h₂ = 2·h₁
The gravitational potential energy, P.E., is given as follows;
P.E. = m·g·h
Where;
m = The mass of the object at height
g = The acceleration due to gravity
h = The height at which is located
Let P.E.₁ represent the gravitational potential energy of one construction worker and let P.E.₂ represent the gravitational potential energy of the other construction worker
We have;
P.E.₁ = P.E.₂
Therefore;
m₁·g·h₁ = m₂·g·h₂
h₂ = 2·h₁
We have;
m₁·g·h₁ = m₂·g·2·h₁
m₁ = 2·m₂
90 kg = 2 × m₂
m₂ = (90 kg)/2 = 45 kg
The mass of the other construction worker is 45 kg.
A wave traveling througil air meets an object and bounced off its flat surface
at a new angle. Which statement best describes what has happened to the
wave?
A-the object had a slit in its surface that diffracted the wave. B- the object caused the wave to refract. C-the object absorbed the waves energy. D- the object reflected the wave.
Answer:
B.) the object caused the wave to refract
Explanation:
The object has caused the wave which is traveling through the air to refract back. Thus, the correct option is B.
What is refraction of wave?Refraction is the phenomena which includes the change in the direction of waves which occurs when the waves travel from one medium to another medium. Refraction is always accompanied by a wavelength and change in speed of the wave. Diffraction is the bending of waves of sound and light which takes place around the obstacles and openings.
A wave traveling through the air meets an object and bounced off its flat surface at a new angle will experience refraction of waves.
Therefore, the correct option is B.
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An astronaut weighs 890 N on Earth. What is the astronaut's weight on the Moon? Acceleration due to gravity on the Moon is 1.62 m/s^2.
Answer:
Explanation:(a) What is her weight on earth? (b) What are her mass and her weight on the moon, where g = 1.62 ms–2? Solution: (a) On earth. W = m g = 55.0 x 9.8 = 539 N. (b) On moon, her mass remains the same, but the acceleration due to gravity
A cheetah has a mass of 60kg. It produces a force of 480 N between its feet and ground. What is the acceleration? PLEASE ANSWER QUICK!!!
The acceleration of the cheetah that has a mass of 60kg and produces a force of 480N is 8m/s²
HOW TO CALCULATE ACCELERATION:
The acceleration of a moving body can be calculated by dividing the force applied by the mass of the object. That is follows:Acceleration (m/s²) = Force (N) ÷ mass (kg)According to this question, a cheetah has a mass of 60kg and produces a force of 480NAcceleration = 480 ÷ 60
Acceleration = 8m/s²
Therefore, acceleration of the cheetah that has a mass of 60kg and produces a force of 480N is 8m/s²Learn more at: https://brainly.com/question/20162276?referrer=searchResults
Bus with a weight of 650 N is sitting on the ground and the bottom of the box measures 0.5 m by 0.7 m. What is the pressure exerted by the box on the ground?
Answer:
185.71 N
Explanation:
Weight = 650N
Dimensions of box = 0.5m by 0.7m
Pressure = ?
The relationship between these quantities is given by;
Pressure = Weight / Area
Area = 0.7 * 0.5 = 3.5 m^2
Pressure = 650 / 3.5 = 185.71 N
how many atoms are in each product silver sulfide
there are 3 atoms in each silver sulfide
An airplane flies for 1.25 hours with a constant speed of 1080 km/hr and then for another 2.5 hours with a constant speed of 984 km/hr. How far (what distance) did it go?
Answer:
i think its 3583.2km skskks
Answer:
840 km/h divided by 60 = 14km/min
3 x 60 = 180
180 + 20 = 200 minutes total
14 x 200 = 2800km
that is a really awkward way of doing it though. really you can just do:
840 x (10/3) = 2800km
How does the present day model of the atom DIFFER from the Rutherford’s model? How does the present day model of the atom SIMILAR to Rutherford’s model?
Answer:
The present day model shows a nucleus composed of protons and neutrons with cloud-like spheres of different diameters surrounding the nucleus to represent the energy levels of the electrons in the atom. Rutherford's model shows electrons orbiting the nucleus along fixed, but similar- diameter circular paths.
Both models show the composition of the nucleus at the center of the atom and the much smaller electrons at some distance from the nucleus.
Explanation:
Neither of the models does a good job of representing the relative size differences of the protons, neutrons and electrons, or the distance between the nucleus and the "electron clouds."
__________________ is a type of limestone deposit found around hot springs and is used for countertops.
Group of answer choices
Travertine
Granite
Marble
Hot liquids and gasses move in one direction
Answer:
some times the glass breaks
Explanation:
Which chemical layer of Earth is creating rift valleys?
✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧ Answer:✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ
continental crust
✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧ Explanation:✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧
Continental rifting
If the diverging plates are capped by continental crust, fractures develop that are invaded by the ascending magma, prying the continents farther apart. Settling of the continental blocks creates a rift valley, such as the present-day East African Rift Valley.
✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧ Brainlist✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧
PLEASE PLEASE HELP!!!!!! thank you soo much!!! *will give brainliest*
Answer:
[tex]F=1.13\,*\,10^{15}[/tex] (answer a)
Explanation:
Recall the formula for the Coulomb force:
[tex]F=k\frac{q_1*q_2}{d^2}[/tex]
which in our case gives:
[tex]F=k\frac{q_1*q_2}{d^2} \\F=9*10^9\,\frac{63*45}{0.15^2} \\F\approx 1134000\,*\,10^9\\F\approx 1.13\,*\,10^{15}[/tex]
which agrees with answer a)
how many basic forces are there in the universe?
Answer:
Four basic fources.
Explanation:
Fundamental force, also called fundamental interaction, in physics, any of the four basic forces—gravitational, electromagnetic, strong, and weak—that govern how objects or particles interact and how certain particles decay. All the known forces of nature can be traced to these fundamental forces.
How much work does it take to lift a 1000 kg elephant into a truck bed that is 1 meter of the ground? (answer in joules)
Answer:
1000 joules
Explanation:
Name the type of energy transfer:
You fry an egg on a hot car engine.
Answer:
I think the heat would transfer from the engine, because of this it would cook the egg
Explanation:
hopes this helps
The thermal heat energy transfer happens when we fry an egg on a hot car engine because the thermal energy lost from the engine is utilized for cooking the egg,
What is thermal energy?It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.
Thermal energy transfer is utilized while cooking food in our day-to-day life, frying egg is one such example of application of the thermal energy for cooking food.
Almost two third of the heat from any thermal engine is lost to the surroundings.
When we fried an egg on a hot vehicle engine, thermal energy is transferred because thermal energy lost from the engine is used to cook the egg.
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1. According to Newton’s first law, when forces are ______ there is NO _______.
2. According to Newton’s first law, when forces are _____ there is ______.
Answer:
1. According to Newton's first law, when forces are balanced there is no acceleration
2.According to Newton's second law, when forces are unbalanced, there is acceleration
Explanation:
this is because Newton's first law of motion states that every object will continue in its state of rest or uniform motion in a straight line unless a resultant force acts on it
hopes this helps, if not, report it, someone else will do it
Evaluate the scenarios and select the one that demonstrates the training principle overload.
kai swims faster and faster every day.
Katie stays consistent in her routine.
Maggie does kickboxing daily so she can win a kickboxing match.
Sarah usually likes to run, but tries swimming.
Answer:
The answer is A.
Explanation:
The answer is A. because overload means to do more and Kai swims more and more every day.
if mr galans paces is equal to 1.8 m,how many paces would it take to get to the moon
Answer:
The number of paces it would take to get to the Moon is 213,555,556 paces
Explanation:
The given length of Mr Galan's paces = 1.8 m/pace
The distance from the Earth to the Moon is, 384,400 km = 384,400,000 m
Therefore, the number of paces, "n", it would take to get to the Moon from the Earth is given as follows;
n = (The distance from the Earth to the Moon)/(The length of each Mr Galan's paces)
∴ n = 384,400,000 m/(1.8 m/pace) = 213,555,556 paces
The number of paces it would take to get to the Moon = n = 213,555,556 paces
the table below shows the effect conditions on a car stopping distance. in witch condition was the car travelling most slowly
Answer: Car 5
Explanation:
Higher speeds mean higher braking times so the car with the highest braking distance was travelling the the fastest and the car with the lowest braking distance was traveling the slowest.
Braking distance = Stopping distance - Thinking distance.
Car Braking distance
1 38
2 50 = 65 - 15
3 75
4 75
5 14 = 23 - 9
Car 5 had the lowest braking distance so was going the slowest.
how can we make periscope
Answer:
place a curved elbow joint pipe over each end of the pipe to make a periscope
Give an example of metals which is the best conductor of heat and shining non metal..
NEED HELP PLZ
Answer:
silver and copper
Explanation:
testing asking a question.
Answer:
i- testing testing,, 1 2 1 2
Answer:
?
Explanation:
Did it work how you wanted?
Describe the relationship between the forces of attraction and the kinetic energy of particles in a solid, a liquid and a gas
Answer:
Described below
Explanation:
1) Solids: In solids, the strong attractive forces between the particles ensure that the particles are packed tightly enough and this means little or no movement between each other. However, when they experience vibration which has relationship with the kinetic energy between them
2) Liquids; In liquids due to the lesser forces of attraction between the particles, it means they tend to glide over each another but however, toward the bottom of the container they will settle. This means that the attractive forces between the liquid particles are barely strong enough to hold onto a specific volume. However, they are not strong enough to keep the molecules from sliding over one other.
3) Gases; In gases, there is almost no existing attractive force in most cases and as a result we can say the kinetic energy of the gas molecules is always greater than the attractive force between them and they are therefore far apart from each other and also move independent of each other.
A total of 288 books was evenly divided among 6 elementary schools and 7 middle schools. What is the best estimate for the number of books each school received?
Answer:
22 books
Explanation:
Total number of books = 288books
Total number of schools = 6 + 7 = 13
If the books are distributed evenly, it means it was distributed in such a way that all the school has equal number of copies.
Each book will receive 288/13 copies
288/13 = 22.15
Hence the best estimate for the number of books each school received is 22 books
In 5 seconds a car moving in a straight line increases its speed
from 50 km/h to 65 km/h, while a truck goes from rest to 15
km/h in a straight line. Which undergoes greater aceleration?
What is the acceleration of each vehicle
Explanation:
because the track and the car moved same speed there their acceleration will be the same
a) The acceleration of the car and the truck are equal since for both vehicle is 15km/h and the time taken for both vehicle is also the same 5s.
b) The acceleration of the each vehicle is 0.83334 m/s².
Given data in the question is,
Time taken for both car and truck, t = 5 seconds
Initial velocity of car, Uc =50km/hr =13.8889 m/s
Final velocity of car, Vc = 65 km/hr = 18.0556 m/s
Since the truck starts from rest,
Initial velocity of the truck Ut =0
Final velocity of the truck Vt = 15 km/hr = 4.16667 m/s
What is acceleration?Acceleration can be defined as the rate of change of velocity.
a) The acceleration of the car and the truck are equal since for both vehicle is 15 km/h time taken for both vehicle is also the same 5s.
b) The acceleration of each vehicle is to determine.
To determine the acceleration for car and the truck , we use the first equation of motion:
v = u+ at
Where v is the final velocity,
u is the initial velocity,
a is the acceleration,
t is the time.
Now, For the car,
13.8889 m/s = 18.0556 m/s + ( a × 5)
a = [tex]\frac{ 18.0556 m/s- 13.8889 m/s}{5}[/tex]
a = [tex]\frac{4.1667}{5}[/tex]
a = 0.83334 m/s².
Hence, the acceleration of the car is 0.83334 m/s².
For the truck,
4.16667 m/s = 0 + (a× 5)
a = [tex]\frac{0-4.16667}{5}\\[/tex]
a = [tex]\frac{4.16667}{5}[/tex]
a = 0.83334 m/s²
Hence, the acceleration of the bicycle is 0.83334 m/s².
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