Explanation:
V = S/t
s =vt
d = 20 x 5
d = 100m
The position of the ball 5 seconds after it was thrown will be 25 m below the edge of building.
What are the three equations of motion?
The three equations of motion are -
v = u + at
S = ut + 1/2at²
v² - u² = 2aS
Given is an object which is thrown straight upward from the edge of a building with a velocity of 20m/s.
Initial velocity [u] = 20 m/s
Acceleration due to gravity [g] = - 10 m/s² (Rounded off 9.8)
At maximum height, the velocity will be 0.
Assume that the time at which the ball reaches max height be T.
Using first law of motion -
v = u + aT
0 = 20 - gT
gT = 20
T = 20/g
T = 20/10
T = 2 sec
Then -
S[max] = 20 x 2 - 0.5 x 10 x 4
S[max] = 40 - 20 = 20 m
At t = 2 sec the ball will be at maximum height. Now at maximum height, the initial velocity of the ball will be 0.
We have to find the position of ball after 3 seconds as after 2 seconds it was at maximum height.
In this case initial velocity will be [u] = 0
Acceleration [a] = 10 m/s²
Time [t] = 3 sec
Using second equation of motion -
S = ut + 1/2at²
S = 0.5 x 10 x 9
S = 45 m
Position of object = [x] = 20 - 45 = - 25 m
The negative sign indicates that the object is now 25 cm below from the edge of building.
Therefore, the position of the ball 5 seconds after it was thrown will be 25 m below the edge of building.
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Please someone help me with this physics work.
Answer:
The first reactant is methane, the next is oxygen, the first product is carbon dioxide and the second product is water.
The word equation is:
methane + oxygen → carbon dioxide + water
The balanced symbol equation is:
CH₄ + 2O₂ → CO₂ + 2H₂O
Explanation:
In any combustion reaction, fuel is burned in the presence of oxygen to produce carbon dioxide and water.
An equation is balanced when there are the same number of atoms of each element on both sides of the arrow.
Hope this helps!
Select the correct answer from each drop-down menu. nick’s swimming goggles are made of blue plastic. when he straps them on, he notices that the goggles change the color of the objects around him. a white ring buoy appears because the blue plastic all colors of light except blue. only the blue light the ring buoy passes through the blue plastic.
The colors Nick observes through his swimming goggles are because of the colors it absorbs, which are all colors except blue.
Why do we observe different colors?We see or observe different colors because different substances reflect different colors while a absorbing different colors.
The colors of objects are as a result of the color they reflect while absorbing others.
The colors Nick observes through his swimming goggles are because of the color it absorbed.
A white ring buoy appears blue because the blue plastic absorbs all colors of light except blue. Only the blue light of the ring buoy passes through the blue plastic.
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A bike first accelerates from 0.0m/s to 5.0m/s in 4.5s, then continues at this constant speed for another 4.5s. What is the total distance traveled by the bike
Initial speed u= 0.0 m/s
Final speed v= 5.0 m/s
Time t1= 4.5s
Time for constant speed t2=4.5s
to calculate the total distance traveled by the bike:d = d₁ + d₂
1 = ( v+u/2) × 1₁ + v × 1₂
v = final speed
u = initial speed
t₁ = time for first accelerates
t2 = time for constant speed
d = (5+0/2) × 4.5+ 5.0 x 4.5
d = 33.75m
so, the total distance traveled by the bike is 33.75 m.
# 1
[tex]\bold{a = \frac{(5-0)}{4.5} = 1.11 m/s^2 }[/tex]
[tex]\bold{ v = 0 + a \: t = 1.11 \times 4.5 = 5 }[/tex]
[tex]\bold{ d = 0 + 0 (4.5) + (\frac{1}{2})(1.11)(4.5)^2 =11.2 }[/tex]
# 2
[tex]\bold{ a = 0 }[/tex]
[tex]\bold{ v = 5 }[/tex]
[tex]\bold{ d = 11.2 + 5 (4.5) + 0}[/tex]
[tex]\bold{ = 11.2 + 22.5 = 33.7 meters}[/tex]
please answer this small qustion of what happens whan oil is in the ochen
Answer:
When oil is spilled in the sea it will normally break up and be dissipated or scattered into the marine environment over time. This dissipation is a result of a number of chemical and physical processes that change the compounds that make up oil when it is spilled. The processes are collectively known as weathering.
Hope This It What You Wanted :)
A certain 48 V electric forklift can lift up to 7000 lb at a
maximum rate of 76 ft/min. What is its power? Round your
answer to the nearest hundreds.
Based on the information provided, the Power of the electric forklift to the nearest hundred is 12,000 W.
What is the formula for arriving at Power in physics?
The formula for calculating power in physics is given as:
P = E/t; where P = Power, E is energy and t is time in seconds. It is also given as :
P = W/Δt
Recall that power is defined as the amount of work done within a specific amount of time.
Where W = Work and; Δt = time elapsed.
Recall that Work (w) = Force x distance
Force here is usually domiciled in Newtons while distance is usually domiciled in meters.
7000 pounds or Lbs to Newtons is
7000 x 4.4482216153 = 31137.551307 N
So let's convert the distance to Meters.
1 foot = 0.3048m
Therefore, 76ft = 23.1648 m
Thus, Work = 31137.551307 X 23.1648 (That is Force in Newtons x distance in meters.)
Work = 721, 295.148516 N·m
Recall that power is given as:
P = W/Δt
= 721,300/60 seconds
= 12,021.6666667, to the nearest hundred, and we have:
P = 12,000 W
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Four point charges, each of magnitude 2.38 µC, are placed at the corners of a square 75.2 cm on a side. If three of the charges are positive and one is negative, find the magnitude of the force experienced by the negative charge. The value of Coulomb’s constant is 8.98755 × 10^9 N · m^2/C^2 . Answer in units of N.
Answer:
The Electric Force on Negative Charge is 2.968 N
Explanation:
charge on each corner, q = 2.38 micro coulomb
Side of square, a = 75.2 cm
Coulombic constant, K = 8.98755 x 10^9 Nm²/C²
sides of the square are A,B,C and D
and all sides of a square are equal so
AB = BC = CD = DA = 75.2 cm = 0.752 m
Diagonal, AC = BD = 1.414 x 0.752 = 1.06 m
Electric field at D due to charge at A
EA= Kq÷AB^2
= 8.98755×10^9 × 9.87×10^-6 ÷ 0.752^2
EA= 156863.82 N/C
Similarly Electric field at D due to charge C
EC=Kq÷CD^2
= 8.98755×10^9 ×9.87×10^-6 ÷ 0.752^2
EC= 156863.82 N/C
Electric field at D due to charge at BB
EB=Kq÷BD^2
EB=8.98755×10^9 × 9.87×10^-6 ÷ 1.06^2
EB=78949.01 N/C
Resolve the compoents
Ex = EA + EB cos 45
Ex = 156863.82 + 78949.01 x 0.707
Ex = 212689.2 N/C
Ey = EC + EB Sin 45
Ey = 156863.82 + 78949.01 x 0.707
Ey = 212689.2 N/C
The resultant electric field is
E = 1.414 x 212689.2 = 300787.95 N/C
the electric force on the negative charge is
F = q x E
F = 9.87 x 10^-6 x 300787.95
F = 2.968 N
A force of 20 N is applied tangentially to a wheel of mass 10 kg and diameter 5 m. Calculate the torque applied and angular velocity at the end of 10 second?
Answer:
N = 2010 + 10 + -5 = 20N + -5 = 10 -5 + 20Therefore , the answer is N=20Explanation:
#BrainliestBunchThe main difference between a radio wave and a light wave is its:.
Answer:
Speed.
Their speeds are different; Have you ever heard the metaphor the speed of light? For this case, we must turn that into a reality. So, people refer to light speed as the fastest travelling thing in the world, and that is right, unless there is a thing faster than light that was never classified. Unlikely the case. The speed of sound through air travels a lot slower than light. Look at the diagrams below to see what I mean by that.
• • •
As shown in the diagrams, sound speed is WAY slower than light speed!
Am object with a mass of 1298 kg is accelerating at a rate of 17 m/s2 when a net force is applied to it. What is the magnitude of the net force that is acting on the object? Could show how you did it please
Answer: 22,066N
Explanation:
By Newton's second Law of Motion, the force on an object is proprtional to the acceleration of the object. The proportionality constant is the mass of the object:
[tex]F=ma[/tex]
Plug in the mass and accleration of the system:
[tex]F=(1298kg)(17m/s^2)[/tex]
[tex]F=22,066N[/tex]
The units for force are Newtons, or equivalently kg*m/s^2.
Hello people ~
please help me with thie question attached above.
Thanks in advance!
Answer:
W = 1/2 x P x E
Explanation:
Let :
P = electric dipole momentE = uniform electric fieldα = initial angleβ = final angleFormula
The work done in a electric field can be found using the formula :W = P x E x (cosα - cosβ)Solving
W = P x E x (cos0° - cos60°)W = P x E x (1 - 1/2)W = 1/2 x P x ELet's see
[tex]\\ \rm\rightarrowtail W=P\vec{E}(cos\theta_i-cos\theta_f)[/tex][tex]\\ \rm\rightarrowtail W=P\vec{E}(cos0-cos60)[/tex]
[tex]\\ \rm\rightarrowtail W=P\vec{E}(1-1/2)[/tex]
[tex]\\ \rm\rightarrowtail W=\dfrac{P\vec{E}}{2}[/tex]
When the wheel of a cart rolls from a smooth sidewalk onto a plot of grass, the interaction of the wheel with the blades of grass slows the wheel. What slows light when it passes from air into glass or water
The light oscillates electrons which then absorbs some of the energy and reemit it thereby causing a delay.
What are Electrons?This is defined as a subatomic particle which has a negative charge. In the glass of water the light oscillates the electrons which absorbs some energy.
The re-emission is what slows light when it passes from air into glass or water.
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The main factors in determining your speed on an acceleration lane are:.
Answer:
amount and speed of traffic on the acceleration lane and expressway.
A 2.3-kg toy locomotive is pulling a 1.4-kg caboose. The frictional force of the track on the caboose is 0.46 N backward along the track. If the train is accelerating forward is 3.1 m/s2, what is the magnitude of the force exerted by the locomotive on the caboose
The net vertical force on the caboose (C) is
∑ F[v, C] = F[n, C] - (1.4 kg) g = 0
where F[n, C] is the magnitude of the normal force exerted by the track on the caboose; so we have
F[n, C] = (2.3 kg) g = 13.72 N
which means the coefficient of kinetic friction µ between the caboose and the track is
F[f, C] = 0.46 N = µ (13.72 N) ⇒ µ = (0.46 N) / (13.72 N) ≈ 0.034
and presumably the coefficient is the same for the locomotive.
The net vertical force on the locomotive (L) is
∑ F[v, L] = F[n, L] - (2.3 kg) g = 0
where F[n, L] is the magnitude of the normal on the locomotive, so that
F[n, L] = (2.3 kg) g = 22.54 N
and so the locomotive is opposed by a frictional force with magnitude
F[f, L] = µ (22.54 N) ≈ 0.76 N
Taking the locomotive and caboose together, the net horizontal force on the system is
∑ F[h] ≈ - F[f, C] - F[f, L] + F[engine] = (2.3 kg + 1.4 kg) (3.1 m/s²)
Solve for F[engine] :
F[engine] ≈ (3.7 kg) (3.1 m/s²) + 0.46 N + 0.76 N ≈ 13 N
In the photoelectric effect, electrons are ejected by matter only if they are given energy from light of a high enough frequency. It does not matter how bright the light source is; only frequency matters. Which reasoning explains why particles are better than waves for describing this phenomenon?(1 point)
The energy from the waves of light coming from bright lights would add up and free an electron.
The energy from light waves is canceled out by interference at low energies, but not at high energies, so it can free electrons with bright light.
The energy from photons of light would never be enough to free electrons because they don't have the same energy if they are just particles.
The energy from photons of light should be enough to knock out an electron, no matter what the frequency of light is, because it is moving so fast.
Answer:Answer is A:The energy from the waves of light coming from bright lights would add up and free an electron.
Explanation:
1. They collect evidence and make sure that the model can be used with reasoning to explain the evidence.
2. The energy from the waves of light coming from bright lights would add up and free an electron.
3. The spots are the result of interference, which happens with waves but not particles.
4. This is not something that waves do because they need a medium to travel through, while particles do not.
5. When the electromagnetic wave peaks overlap, a bright fringe forms.
I promise this is correct because i failed and this is what it said if this is ever wrong they must have changed the quick check
a bar magnet is dropped vertically through a long piece of copper pipe. What effect does the falling magnet have on the pipe? Select all that apply
Answer:
An induced magnetic field is always opposed to the change that produced the magnetic field.
Thus, such a bar magnet will be slowed on its descent thru the pipe because it will produce a current in the pipe that will produce a magnetic field in an opposite direction to the field that produced the current.
(a repelling magnetic field will produce a force that opposes the force producing it - otherwise one has a way to produce pertpetual motion)
For added effect, he takes the monitor up to the roof which is about 84 m above the ground. What is the velocity of the monitor as it hits the ground?
The velocity of the monitor as it hits the ground is equal to 40.58 m/s.
Given the following data:
Height = 84 meters.Scientific data:
Acceleration due to gravity (g) = [tex]9.8 m/s^2.[/tex]How to calculate the velocity.In accordance with the law of conservation of energy, the potential energy possessed by the monitor at the roof top would be equal to the kinetic energy possessed by the monitor at the ground:
[tex]PE=KE\\\\mgh=\frac{1}{2}mv^2\\\\2mgh=mv^2\\\\V=\sqrt{2gh}\\\\V=\sqrt{2 \times 9.8 \times 84}\\\\V=\sqrt{1646.4}[/tex]
V = 40.58 m/s.
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You are riding a bicycle. If you apply a forward force of 150 N, and you and the bicycle have a combined mass of 90 kg, what will be the forward acceleration of the bicycle Assume there is no friction)
A. 1.67 m/s2
B. 1.85 m/s2 m
C. 0.60 m/s2
D. 3.37 m/s2
Force(F) = 150N
Mass(m) = 90kg
To Find,Acceleration(a) = ?
We know,F= m×a
[tex]150 = 90 \times \text{a} \\ \\ \text{a} = \frac{150}{90} \\ \fbox{cancelling by 3} \\ \\ \text{ a} = \cancel \frac{150}{90} \\ \\ \text{ a} = \frac{5}{3} = 1.67 \text{m/s} {}^{2} [/tex]
[tex] \therefore \text{Option A= 1.67 m/s² is the correct answer}[/tex]
Hope this helpsAnswer:
A. 1.67 m/s2
Explanation:
F = m*a, so a = F/m = 150/90 ≈ 1.67 [tex]m/s^2[/tex]
In three to four sentences, explain how climate change could impact the formation of hurricanes. (4 points)
The climate change can directly impact the formation of hurricanes because increasing temperature increases intensity of hurricanes.
How climate change could impact the formation of hurricanes?Evaporation increases as temperatures rise which also causes the transfer of heat from the oceans to the atmosphere. As the storms travel across oceans whose water is warm, they absorb more water vapor and heat which increases rainfall as well as intensity of hurricanes.
So we can conclude that the climate change impacted the formation of hurricanes due to increasing temperature that increases intensity of hurricanes.
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What is the difference between organic and inorganic material?
Organic materials comes from living things while inorganic materials comes from non living things
Organic materials are those composed mainly of carbon they are derived from living things while inorganic materials are derived from non living things sucjh as rocks etc
15. What drives the motions of the Earth's
atmosphere system?
A energy from the sun
B surface currents
C weather
D Earth's rotation
How much magnification is needed to see a nanometer?.
four pieces of graph paper a ruler two pencils a helper Follow these steps: Choose which person will be the sender (satellite) and which will be the receiver (television). Each person then draws a 10" by 10" square on a piece of graph paper. Draw a grid within the square, so that each small square of the grid is about 1 inch square. This should give you an area with 100 squares in it. The size of the small squares will depend somewhat on the graph paper used - make sure you use some of the lines on the graph paper as guidelines. The sender now draws a simple picture within the 10" x 10" square without letting the receiver see what he or she is drawing. The sender should now “read” the picture to the receiver, using a digital code. If a square on the graph paper is blank, the sender says “Zero”; if the square is filled in or has any mark in it at all, the sender says, “One.” Using this code, the sender starts with the top row and reads from left to right, one square at a time. The receiver, upon hearing this code, transfers the information to his own graph paper. The receiver must mark the graph paper by starting with the top row of squares and going from left to right. If the sender says “zero,” no mark is made. If the sender says “one,” the receiver should fill in the square completely! At the end of the first row, the sender should say, “End row 1,” and repeat this at the end of each row. At the end of the last row, compare the two pictures. Check the results to see how accurate the transfer was. Now, get two more pieces of graph paper and draw 10” by 10” squares on them. This time, your grid size should be close to 1/4 inch rather than one inch. You will have many more squares than before! You can use the same drawing or switch people and the new sender can draw another picture. Follow the same procedure. Describe your results. Compare the accuracy of the two pictures drawn by the receiver. Which one is more precise
Answer:
is there a picture? so I can understand it more and it will be easier for me to answer. thank you
Answer:
The second one is more accurate because we were able to draw more precisely and accurately, the first picture was more of a general idea of the picture and the second picture was more of a detailed version.
Explanation:
I just did this assignment and this is what I turned in so yeah I hope this is good enough, if you need more of an explanation though ill try to lengthen it. =]
m=3000km v=25m/s what’s the momentum?
Answer:
75000kg m/s
Explanation:
Momentum = Mass X Velocity
p = mv
3000 X 25 = 75000 kg m/s
If we want to get an estimate for the average distance from the sun to a planet, how might we go about doing this? (Choose one answer):
1. By measuring the eccentricity of the orbit, which is directly
related to the size of the orbit's ellipse and hence the distance
from the sun.
2. Measure its orbital period (the time it takes to complete a
single orbit) because Kepler's third law allows us to calculate
the orbit's semi-major axis from this.
3. This cannot be done without sending a probe to the planet.
We have done this for some planets already, but not others.
The distance between the sun and a planet can be gotten by measuring its orbital period and applying the Kepler's law.
Kepler's lawsAccording to Keplers third law; the cube of the distance between a planet and the sun is directly proportional to the square of the period of the same planet.
Having said that, we know that we can best measure the distance between the sun and a planet by measuring its orbital period and applying the Kepler's law.
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If two objects collide and stick together, what must increase?
A. the acceleration due to gravity
B. the friction between the two objects
C. the force of gravity between the objects
D. the two objects' momentum
Help pls.
What is the volume of the composite figure? 140 cubic inches 147 cubic inches 168 cubic inches 196 cubic inches.
The composite figure is a combination of a rectangular pyramid and a rectangular prism, hence its volume is 140in³.
Rectangular Prism and PyramidA rectangular prism is simply a three dimensional solid shape with six faces that are rectangles.
Volume of a rectangular prism is expressed as;
V = w × h × l
Where l is length, h is height and w is width
A rectangular pyramid is simply a three-dimentional object with a rectangular shaped base and triangular shaped faces that correspond to each side of the base.
The volume of rectangular pyramid is expressed as;
V = (1/3) × l × w × h
Where l is the base length, w is the base width and h is the height of the pyramid.
From the diagram below;
Length of rectangular prism Lprism = 7inWidth of rectangular prism Wprism = 3inHeight of rectangular prism Hprism = 4inLength of rectangular pyramid Lpyramid = 7inWidth of rectangular pyramid Wpyramid = 3inHeight of rectangular pyramid Hpyramid = 12in - 4in = 8inFirst we calculate the volume of a rectangular prism.
V = w × h × l
V = 3in × 4in × 7in
V = 84in³
Hence, the volume of the rectangular prism is 84in³.
Next, we calculate the volume of rectangular pyramid.
V = (1/3) × l × w × h
V = (1/3) × 7in × 3in × 8in
V = (1/3) × 168in³
V = 56in³
Hence, the volume of the rectangular pyramid is 56in³.
Volume of the composite figure = Volume of prism + Volume of pyramid
Volume of the composite figure = 84in³ + 56in³
Volume of the composite figure = 140in³
Therefore, the composite figure is a combination of a rectangular pyramid and rectangular prism, hence its volume is 140in³.
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why empty tin-cans ocillating for a longer time
Answer: When you speak into the can, your voice creates air vibrations that travel into the can, vibrate the bottom of the can, which in turn vibrates the string all the way over to the other can, in turn vibrating the other can's bottom, then the air again.
Explanation:
how is the effect of balanced forces different from that of unblanced forces on the motion of an object
Answer:
Balanced forces do not result in any change in motion.
Explanation
forces applied to an object in opposite directions that are not equal in size. Unbalanced forces result in a change in motion. friction the force that opposes the motion or tendency toward motion of two objects that are in contact.
Answer:
balanced forces are equal in size and opposite in direction
define one kilogram mass
Answer:
The amount of a certain global prototype was created of platinum-iridium and held at the International Bureau of Weights and Measures.Explanation:
Hopes this helps.15 points!! PLEASE ANSWER! I NEED IT QUICK!
What happens to the energy of a wave if the amplitude of the wave is doubled?
How does the frequency of a wave relate to the energy of the wave?
Answer:
See below ↓
Explanation:
We know that the energy of a wave is directly proportional to the amplitude of a the wave. That means it directly varies, so when one increases/decreases, the other does the same.
Therefore, when the amplitude of a wave is doubled, the energy of the wave is also doubled.
Similarly, in the case of the frequency of the wave, it is also directly proportional to the energy of the wave.
⇒ E ∝ ν
