Answer:
[tex]a=-10.86\ m/s^2[/tex]
Explanation:
Given that,
Mass of a ball, m = 0.75 kg
It is dropped off a balcony Sandra standing on the ground below the balcony, catches the ball by exerting a 15.5N force upwards on the ball.
We need to find the acceleration of the ball while Aisha is catching it.
The net force acting on the ball is given by :
F = ma
In this case, when the ball is accelerating downward,
mg-F=ma
a is the acceleration of the ball and g is the acceleration due to gravity
So,
[tex]a=\dfrac{mg-F}{m}\\\\a=\dfrac{0.75\times 9.81-15.5}{0.75}\\\\a=-10.86\ m/s^2[/tex]
A negative sign shows that the ball is accelerating in a downward direction.
a 3000 kg car accelerates uniformly from 15 m/s to 60 m/s in 5 seconds. determine the net force on the car during this time
Answer:
F = 2700 N
Explanation:
Given that,
Mass of a car, m = 3000 kg
Initial velocity, u = 15 m/s
Final velocity, v = 60 m/s
Time, t = 5 s
We need to find the net force on the car during this time . The net force on an object is given by the product of mass and acceleration. So,
F = ma
a is acceleration, a = (v-u)/t
[tex]F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{3000\times (60-15)}{5}\\\\F=27000\ N[/tex]
So, 27000 N is the net force on the car during this time .
A buoy is anchored tho the oceanfloor. A large wave approaches the buoy. How will the buoy move as the wave goes by?
Answer:
The buoy will move upwards and downwards and well as left and right
Explanation:
As the wind is storing so had the capability to move the buoy in all directions as it is a light object despite being anchored down
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Hi. If a body with a positive charge touches another with a positive charge, do any of them lose electrons?
The perimeter the sphere is the extreme to which they can go. If ... But what happens if a positively charged object is touched to a neutral object? ... The metal sphere loses electrons.
What is a way to boost your self-esteem.
Worry about others opinions
Exhibit risky behaviors
Maintain a negative attiude
From close relationships
20 points
Answer:
I say...D!~
Explanation:
I think you mean form*
Hope it helps~ (Sorry if you get it wrong-)
~The Confuzzeled homan
Your friend has been hired to design the interior of a special executive express elevator for a new office building. This elevator has all the latest safety features and will stop with an acceleration of g/3 in the case of an emergency. The management would like a decorative lamp hanging from the unusually high ceiling of the elevator. He designs a lamp which has three sections which hang one directly below the other. Each section is attached to the previous one by a single thin wire, which also carries the electric current. The lamp is also attached to the ceiling by a single wire. Each section of the lamp weighs 7.0 N. Because the idea is to make each section appear that it is floating on air without support, he wants to use the thinnest wire possible. Unfortunately the thinner the wire, the weaker it is. Since he knows that you have taken a course in physics, he asks you to calculate the force on each wire in case of an emergency stop.
Required:
Calculate the force.
Answer:
Sorry, don't understand the question
Explanation:
Do you think it’s ethical for tech companies to use your personality type, browsing habit,and online behavior to personalize your experience
Answer:
Yes. Yes. Yes
Explanation:
Answer Is yes
Which statement describes the influence of latitude on temperature?
Latitudes are angles that range from zero degrees at the equator to 90 degrees North or South at the poles.
Temperature is inversely related to latitude. As latitude increases, the temperature falls, and vice versa.
Generally, around the world, it gets warmer towards the equator and cooler towards the poles.
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The planets move around the center star in different orbits. Which planet has more Vittar is in the same relative position from its star as earth’s orbit isfrom this Sun?
A planar insulating sheet with an infinitesimal thickness has charge per unit area σ and is parallel to the x−z plane, as shown. (The arrows indicate that the object extends for a long distance in the horizontal plane.) By the symmetry of the problem, the electric field may be expressed as E⃗ =Ej^. This problem relates the change in the electric field from the lower side to the upper side of the insulating sheet to the surface charge density.
a) Enter a vector expression, in Cartesian unit-vector notation, for the electric field at points just above the planar insulating sheet.
b)Enter a vector expression, in Cartesian unit-vector notation, for the electric field at points just below the planar insulating sheet.
a. The electric field above the planar insulating sheet is Ej = (σ/ε₀)j
b. The electric field below the planar insulating sheet is -Ej = -(σ/ε₀)j
a. Electric field above planar insulating sheetThe electric field above the planar insulating sheet is Ej = (σ/ε₀)j
Gauss's law
Using Gauss' law ε₀∫E.dA = q where
ε₀ = permittivity of free space, E = electric field vector normal to the surface above the planar insulating sheet = Ej, dA = normal vector to surface above the planar insulating sheet = dAj, q = charge enclosed by Gaussian surface on planar insulating sheet = σA where σ = surface charge density and A = area of surfaceNow, ε₀∫E.dA = q
ε₀∫Ej.dAj = σA
ε₀∫EdA = σA
ε₀E∫dA = σA
ε₀EA = σA
ε₀E = σ
E = σ/ε₀
So, the electric field above the planar insulating sheet is Ej = (σ/ε₀)j
b. Electric field above below insulating sheetThe electric field below the planar insulating sheet is -Ej = -(σ/ε₀)j
Gauss's law
Using Gauss' law ε₀∫E.dA = q where
ε₀ = permittivity of free space, E = electric field vector normal to the surface below the planar insulating sheet = -Ej, dA = normal vector to surface below the planar insulating sheet = -dAj, q = charge enclosed by Gaussian surface on planar insulating sheet = σA where σ = surface charge density and A = area of surfaceNow, ε₀∫E.dA = q
ε₀∫-Ej.-dAj = σA
ε₀∫EdA = σA
ε₀E∫dA = σA
ε₀EA = σA
ε₀E = σ
E = σ/ε₀
So, the electric field below the planar insulating sheet is -Ej = -(σ/ε₀)j
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Think of a person standing still at the end of a diving board, getting ready to make a dive into a pool. When the diver is ready, the diver will make 3 small jumps on the diving board, and then dive into the water. Where is the amount of potential energy increasing? Where is the amount of potential energy decreasing and the amount of kinetic energy increasing? Where are the points of maximum kinetic energy? Where are the points of maximum potential energy?
Answer:
The amount of potential energy is increasing when they jump on the board. The amount of potential energy is decreasing and the amount of kinetic energy is increasing when they are falling towards the water. The point of maximum kinetic energy is right before they splash into the water. The point of maximum potential energy is when they jump the highest into the air.
Explanation:
The points of maximum potential energy when they jump highest into the air, their potential energy is at its highest.
What is potential energy?Potential energy develops in systems where the configuration, or relative position of the pieces, determines the amount of the forces they exert on one another. Potential energy directly proportional to height of object higher the object higher the potential energy with respect to same reference point.
When they jump onto the board, potential energy is building. When they are descending toward the sea, their potential energy is dwindling and their kinetic energy is rising. Just before they splash into the water is when they have the most kinetic energy. When they jump highest into the air, their potential energy is at its highest.
Potential energy is highest at its highest point of jump.
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Which scenario is an example of a scientific way of thinking ?
A example of a scientific way of thinking is making observations, forming questions, making hypotheses, doing an experiment, analyzing the data, and forming a conclusion.
1.which of the following terms is the measure of the distance between two neighboring Crest or trough?
A.wavelength
B.amplitude
C.hertz
D.Frequency
2.What wave can travel space?
A.mechanical
B.transverse
C.longitude
D.elctromagnet
3.what is being transferred by a wave?
A.energy
B.matter
C.particles
D.light
4.what is the speed of a wave with a frequency of sound?
A.645 m/s
B.576 m/s
C.875 m/s
D.975 m/s
Paki Sagot po
Answer:
A
D
A
Is all the information here?
If so than I do not know
The first 3 are correct though
Explanation:
A diffraction grating has 300 lines per mm. If light of wavelength 630 nm is sent through this grating, what is the highest order maximum that will appear? A diffraction grating has 300 lines per mm. If light of wavelength 630 nm is sent through this grating, what is the highest order maximum that will appear? 5 6 2 8 5.3A diffraction grating has 300 lines per mm. If light of wavelength 630 nm is sent through this grating, what is the highest order maximum that will appear? A diffraction grating has 300 lines per mm. If light of wavelength 630 nm is sent through this grating, what is the highest order maximum that will appear? 5 6 2 8 5.3
Answer:
The order of maximum is [tex]n = 5[/tex]
Explanation:
From the question we are told that
The diffraction grating is k = 300 lines per mm = 300000 lines per m
The wavelength is [tex]\lambda = 630 \ nm = 630 *10^{-9} \ m[/tex]
Generally the condition for constructive interference is mathematically represented as
[tex]dsin \theta = n * \lambda[/tex]
Here n is the order maximum
d is the distance the grating which is mathematically represented as
[tex]d = \frac{1}{k}[/tex]
=> [tex]d = \frac{1}{300000}[/tex]
=> [tex]d = 3.3*10^{-6}\ m [/tex]
So
[tex]n = \frac{dsin \theta}{ \lambda}[/tex]
at maximum [tex]sin\theta = 1[/tex]
[tex]n = \frac{d}{\lambda}[/tex]
=> [tex]n = \frac{3.3*10^{-6}}{630 *10^{-9}}[/tex]
=> [tex]n = 5[/tex]
weather meaning of physics
Answer:
1. The day-to-day conditions of the atmosphere at a place with respect to elements like humidity, temperature, wind speed, rainfall, etc. is called the weather of that place.
2. Weather can be cloudy, sunny, rainy, stormy or clear. It is a part of the natural phenomenon which maintains the equilibrium in the atmosphere.
3. But conditions can be worse sometimes. When the atmospheric conditions are extreme or intense enough to cause property loss or life loss, such weather is termed as severe weather.
4. These also vary according to the altitudes, latitudes, and region and pressure differences. Tornadoes, cyclones, heavy rainfall, fog, winter storms come under this category. They are disastrous and hazardous. Proper disaster management and strategies are required to handle these conditions.
A raging bull of mass 700 kg runs at 36 km/h .How much kinetic energy does it have ?
Answer:
Use equation for kinetic energy: Ek=mV²/2
m=700 kg
V=10m/s
Ek=700kg*100m²7s²/2
Ek=35000 J=35kJ
Explanation:
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Assessment started: undefined.
Item 1
Select a word from the drop-down menu to correctly complete the statement.
The elements fluorine, chlorine, and iodine are all part of the same on the periodic table.
a.diagonal
b.group
c.piriod
d.row
Answer:
Option B: Group
Explanation:
The elements fluorine, chlorine, and iodine are commonly known as halogens.
They all have 7 valence electrons in their outermost shell and thus they all belong to group 7A in the periodic table.
Correct Answer is: Group
Answer:
Explanation:
Group hope this helps
If the orbit of a rocket is a circle around the earth with a radius
= 8 x 106m, and the mass of the earth is 5.97 x 1024 kg while
that of the rocket is 0.5 x 106 kg, then what is the speed of the
rocket under uniform circular motion (in m/s, G = 6.67 * 10-11 N
(m/kg) ?)?
Speed of the rocket under uniform circular motion is 4.97 × [tex]10^7[/tex] m/s.
What is centrifugal force?A fictitious force that moves in a circle and is directed away from the center of the circle is called centrifugal force. When measurements are taken in an inertial frame of reference, the force does not exist. It only becomes relevant when we switch from a ground/inertial reference frame to a rotating reference frame.
As the rocket is in uniform circular motion, the gravitational force due to earth and centrifugal force must be equal in magnitude.
The magnitude of gravitational force due to earth, [tex]F_G = \frac{G M m}{R^2}[/tex]
And, the magnitude of centrifugal force, [tex]F_C = \frac{mv^2}{R}[/tex]
Where,
G = universal gravitational constant = 6.67 * 10-11 N (m/kg)².
M = the mass of the earth = 5.97 x [tex]10^{24[/tex] Kg.
m = the mass of the rocket = 0.5 x [tex]10^6[/tex]kg.
R = the orbit of the rocket = [tex]{8*10^6}[/tex]m.
For uniform circular motion,
[tex]\frac{G M m}{R^2}[/tex] = [tex]\frac{mv^2}{R}[/tex]
⇒ v² = [tex]\frac{GM}{R}[/tex]
⇒v² =[tex]\frac{6.67 * 10^{-11 } *5.97 x 10^{24 } }{8*10^6}[/tex]
⇒ v = 4.97 × [tex]10^7[/tex] m/s.
Hence, the speed of the rocket is 4.97 × [tex]10^7[/tex] m/s.
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Theweight ofof body is 420N .Calculate its mass
Answer:
42.87
Explanation:
OR
420/9.8 which equals 42.87.
The work done in holding a 60 kg object at a height of 2 m above the floor for 20 s is
Answer:
zero
Explanation:
The work done is zero because the object has no displacement
Calculate the displacement in m and velocity in m/s at the following times for a rock thrown straight down with an initial velocity of 11.4 m/s from the Verrazano Narrows bridge in New York City. The roadway of this bridge is 70.0 m above the water. (Enter the magnitudes.)
(a)
0.500 s
displacement
velocity
Answer:
y = 6.92[m]
Vf = 16.305[m/s]
Explanation:
To solve this problem we must use the following kinematics equations, where we must first find the final velocity.
[tex]v_{f}=v_{i}+(g*t)[/tex]
where:
Vi = initial velocity = 11.4[m/s]
Vf = final velocity [m/s]
t = time = 0.5[s]
g = gravity acceleration = 9.81[m/s^2}
Note: the positive sign in the equation above is because the acceleration of gravity goes in the direction of the motion of the rock.
Vf = 11.4 + (9.81*0.5)
Vf = 16.305 [m/s]
Now we can calculate how far the rock goes, using the following equation:
[tex]v_{f} ^{2}= v_{i} ^{2}+(2*g*y)\\v_{f} ^{2}- v_{i}^{2} = 2*g*y\\y = \frac{v_{f} ^{2}- v_{i}^{2}}{2*g} \\y = \frac{16.305^{2}-11.4^{2} }{2*9.81}\\ y=6.92[m][/tex]
Therefore the Rock will be (70 - 6.92) = 63.07 [m] above the water level
what is a mitochondria
Answer:
The mitochondria, also known as the mitochondrion, is the organelle that produces energy in living organisms.
Explanation:
This organelle is found in Eukaryotic cells. This organelle converts energy into food molecules through a process known as cellular respiration.
I hope this helps you
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A car travels 100 m in 4 s on a highway going east. What is the velocity of the car?
Answer:
velocity =25Explanation:
Average velocity =total displacement /time e takenso,average velocity =total displacement
total time taken
100m/4 =25
velocity =25What is the atomic number of this element?
The density of blood is 2kg/m.convert to g/cm
Explanation:
if we convert it into g/cm it'll be
2000 grams
Explain the disadvantage
of precision
Answer:
The disadvantages are listed below for the defined term.
Explanation:
The initial costs of introducing this method are high, so a long-term solution to agriculture should have been in place. To completely develop a functioning system, it often takes many years to gather data and you'll have to be vigilant about gathering and reviewing data to create a level playing field.What is the symbol that is used to indicate the fulcrum in a lever?
A triangle is the symbol used to indicate a fulcrum in a lever, a triangle has three sides and three vertices.
What is a fulcrum?A fulcrum is a pivot that has a base and a point that serves as a balance for a lever.
What is a lever?Basically a lever is a simple machine that is a beam with two sides pivoted to fulcrum.
A lever has Load, Effort and the last part is fulcrum
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Based on the levels of processing memory model, place in order how deeply the following information about dogs will be encoded, from the shallowest to the deepest.
From the question, the order of information processing from the shallowest to the deepest is;
A person glances at a magazine and sees a picture of a dog.A person can remember all the breeds of dogs because she knows a song that lists them.A person dog-sits and spends the weekend walking and playing with a dog A person who grew up with a dog enjoyed walking in the woods with her pet.What is information processing?
The term information processing means the way in which we deal with information. It is the process by which information is encoded into our memory.
The following is the order of information processing from the shallowest to the deepest;
A person glances at a magazine and sees a picture of a dog.A person can remember all the breeds of dogs because she knows a song that lists them.A person dog-sits and spends the weekend walking and playing with a dog A person who grew up with a dog enjoyed walking in the woods with her pet.Learn more about memory processing: https://brainly.com/question/24863946
Light travels fast and in a _______________.
straight line
compression wave
wavy line
blue line
{its for my sis shes stu!pd}
Answer:
Straight Line
Light travels in straight lines called rays. Light travels "at the speed of light." This speed is about 186,000 miles per second (670 million miles per hour), or about 300,000 kilometers per second.
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is there gravity in water?
Gravity works the same way in water that it works in air or a vacuum -- but you have to consider the force of gravity on the water as well as on the object you put into it