Answer:
The speed is 15.5 m/s
The kinetic energy can be written as:K =
(1/2)*m*v^2
where m is the mass and v is the speed.
Then we have that:
18 j = (1/2)*0.15kg*v^2
Now we solve this for v.
✓(18*2/0.15) = v
15.5 m/s = v
Explanation:
I hope it will help you.....
1. If a car sits out in the sun every day for a long time, can light from the sun damage the car's paint?
a
Yes. The paint can take in energy from the light, causing it to be damaged.
b
No. Light can only change things by warming them up. so it cannot damage the car's paint.
С
No. Light is not a physical thing, so it cannot change physical things like paint.
d
Yes. Light from the sun can pull energy out of the paint. causing it to be damaged.
[tex] \huge\boxed{ \tt option \: a}[/tex]
Yes. The paint can take in energy from the light, causing it to be damaged.
the answer is
A , Yes. The paint can take in energy from the light, causing it to be damaged
QUESTIONS: 1 In your list, what skill you find more difficult during your execution? Explain your answer 2. Do you believe that during your executions all types of energy systems are working together? Explain your answer 3 What other observations you experienced while performing your listed skats in your sport (Pulse rate increase, Short of breath, muscle pain, etc)?
Locomotor skills are energy intensive and the pulse rate increases, shortness of breath ensues and pain increases in the muscle due to build up of lactic acid.
What are skills in sport?Skills are abilities that are acquire through training and practice such the athlete is able to execute them effectively and efficiently.
Some skills that can be acquired in sports include:
locomotor and non-locomotor skills such as running, leaping and jumping.object control skills such catching and throwing.Learning a skill requires energy input.
Locomotor skills require the highest energy input.
During the learning of intensive skills such as locomotor skills, the pulse rate increases, shortness of breath ensues and pain increases in the muscle due to build up of lactic acid.
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May I get an answer?
Answer:
Explanation: all of them have made sentence structure (grammar point view) and from the physical aspect.
how are magnetic domians and magnetic fields connected
The mass of the car is 800kg.Force A increases to 5000 N. This causes the car to accelerate initially at 1.5 m/s^2. Calculate the size of force B.
The size of force B is 3800 N.
What is force?This can be defined as the product of the mass and acceleration of a body.
From the diagram attached,
Formula:
Fa-Fb = ma................... Equation 1Where:
Fa = Size of Force AFb = Size of Force Bm = mass of the cara = Acceleration of the carmake Fb the subject of the equation
Fb = Fa-ma................ Equation 2From the question,
Given:
Fa = 5000 Nm = 800 kga = 1.5 m/s²Substitute the given values into equation 2
Fb = 5000-(800×1.5)Fb = 5000-1200Fb = 3800 N.Hence, The size of force B is 3800 N.
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The bending of a wave through an opening in a barrier is:
refraction
resonance
diffraction
interference
if a 2 kg balls thrown straight upward with a KE of 500 j. what maximum height will it reach?
Answer:
I think its 25.51 m!!
Explanation:
Help pls I dont want to fail my class
How fast would a penny be falling when it reaches ground level if dropped from rest off the 102nd floor observation deck of the empire state building? (381 meters above the ground) You may treat air resistance as negligible.
Air resistance is negligible
Distance=381m=sAcceleration due to gravity=g=10m/s^2Initial velocity=u=0m/sFinal velocity=v=?Apply third equation of kinematics
[tex]\\ \tt\longmapsto v^2=u^2+2gs[/tex]
u=0[tex]\\ \tt\longmapsto v^2=2(10)381[/tex]
[tex]\\ \tt\longmapsto v^2=7620[/tex]
[tex]\\ \tt\longmapsto v=87.29ms^{-1}[/tex]
Answer:
According to the Given Statement
Penny is dropped from rest of the 102nd floor which is 381 metres above from the ground.
we 'll take here the acceleration due to gravity (g ) is 9.8m/s²
Its initial velocity u be 0 m/s ( as it is at rest)
Using Kinematic Equation
v² = u² + 2ghhere h is the height of 102nd floor
➥ v² = 0² + 2 × 9.8 × 381
➥ v² = 0 + 19.6 × 381
➥ v² = 7467.6
➥ v = √7467.6
➥ v = 86.41 m/s
So, 86.41 m/s penny would be fall.
SORRY LAST ONE FOR TODAY, IM GOING TO PASS IF I GET THIS ANSWERED
A cannon fires a cannonball directly upwards at +150m/s. How long does it take for the cannonball to reach maximum height?
Answer:
According to the Given Statement
Canon fires directly upwarda at 150m/s ( Initial speed, u )
Acceleration due to gravity is 10m/s²
Since Cannon ball reach it maximum height so its final velocity v will be 0 m/s .
Using Kinematic Equation
v = u + gtOn substituting the value we get
➥ 0 = 150 + 10 × t
➥ 150 = 10 × t
➥ 150/10 = t
➥ 15 s = t
So, it will take 15 seconds .
Answer:
maximum height reached: 15 s
Explanation:
using the formula: maximum height reached = [(sin(θ) * speed)/ gravity]
Here speed is 150m/s and gravity is 10 m/s² and as it does directly upwards, it has an angle of 90°
using the formula:
maximum height reached = [(sin(90) * 150)/ 10] = 15 s
help ASAP plsss (help is appreciated and thank you!)
Which is not a result of acid precipitation?
A) it can harm fish and other organisms
B) it can pollute soil, killing trees and other plants
C) it can increase the chance of asthma attacks
D) it can damage buildings and statue made of some types of rocks
Answer:
C. It can increase the chance of asthma attacks
Explanation:
Have you ever felt a shock sliding down a plastic slide (like in a McDonald’s Play Place)? Do you think this is related to electricity? How?
Answer:
Yes because while you slide down the slide you are obviously going to wear clothes and the cotton on your clothes rubbing up against that rubber from the slides, are gonna react by sending a static electricity shock feeling to your body
Explanation:
Answer:
The same effect can be observed on other non-conductive, polymer surfaces like the mesh of a trampoline. If it is sitting in the sun for a while, you can feel the static charge on it when you approach it, even if no one has been on it recently (so it's not just from friction of users' clothing).
Explanation:
There are always stray electrons flying around, everywhere. The plastic of the slides (and other, non-conductive materials) tend to build up spare electrons just from the air currents moving over them, so its not really the sun that makes them collect charge. As the air around the plastic heats up, it loses its density and humidity, meaning that electrons that were sitting on or close to the plastic get stuck there. Air flowing over the plastic deposit more electrons. As the air cools after the sun goes down (or if it gets cloudy enough), the air around the plastic becomes more dense and can hold more humidity, which means that the electrons can be carried away by stray ions faster, and the amount of excess charge decreases.
Use the ratio version of Kepler’s third law and the orbital information of Mars to determine Earth’s distance from the Sun. Mars’s orbital period is 687 days, and Mars’s distance from the Sun is 2. 279 × 1011 m. 1. 49 × 1011 m 1. 49 × 1033 m 3. 34 × 1011 m 3. 34 × 1033 m.
Kepler's third law is used to determine the relationship between the orbital period of a planet and the radius of the planet.
The distance of the earth from the sun is [tex]1.50 \times 10^{11}\;\rm m[/tex].
What is Kepler's third law?
Kepler's Third Law states that the square of the orbital period of a planet is directly proportional to the cube of the radius of their orbits. It means that the period for a planet to orbit the Sun increases rapidly with the radius of its orbit.
[tex]T^2 \propto R^3[/tex]
Given that Mars’s orbital period T is 687 days, and Mars’s distance from the Sun R is 2.279 × 10^11 m.
By using Kepler's third law, this can be written as,
[tex]T^2 \propto R^3[/tex]
[tex]T^2 = kR^3[/tex]
Substituting the values, we get the value of constant k for mars.
[tex]687^2 = k\times (2.279 \times 10^{11})^3[/tex]
[tex]k = 3.92 \times 10^{-29}[/tex]
The value of constant k is the same for Earth as well, also we know that the orbital period for Earth is 365 days. So the R is calculated as given below.
[tex]365^3 = 3.92\times 10^{-29} R^3[/tex]
[tex]R^3 = 3.39 \times 10^{33}[/tex]
[tex]R= 1.50 \times 10^{11}\;\rm m[/tex]
Hence we can conclude that the distance of the earth from the sun is [tex]1.50 \times 10^{11}\;\rm m[/tex].
To know more about Kepler's third law, follow the link given below.
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Difine velocity?
Thnx~~[tex] \: \: \: [/tex]
Velocity is simply defined as the rate of change of displacement per unit time. Mathematically, it can be expressed as
Velocity = displacement / time
How to determine velocityFor example: A car travels 400 m due north in 40 s. What is the velocity of the car.
From the question given above, we can obtain the velocity as follow:
Displacement = 400 m due north Time = 40 sVelocity =?Velocity = displacement / time
Velocity = 400 / 40
Velocity = 10 m/s
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any two difference between negative and positive charge of class 7 please fast
Answer:
any two difference between negative and positive charge
➢The matter is positively charged if it contains more protons than electrons, and it is negatively charged if it contains more electrons than protons.
Explanation:
I hope it will help you.....
[tex]kai6417[/tex]
#carryonlearning
When light reflects on a mirror, does it undergo a phase change?
or...
Is the surface of a mirror a free boundary or a rigid boundary?
Sir Isaac Newton first explained the relationship between force and motion. True or false?
Answer:
true
Explanation:
sir isaac newton was the first person to explain the relationship between force and motion
Question 10 of 10
Magnetic striping is evidence of
A. pole reversals
B. Earth's rotation
C. Jupiter's magnetosphere
D. the Van Allen belts
SUBMIT
Answer:
A. pole reversals
Explanation:
It's an evidence of magnetic pole reversal of Earth & sea-floor spreading.
Hope this helps!
Magnetic striping is evidence of seafloor spreading and pole reversals. Hence, option A is correct.
What is sea floor spreading?The notion that oceanic crust develops along submarine mountain zones, commonly known as the mid-ocean relevant standard, and expands out laterally away from them. This concept was crucial in the creation of the doctrine of plate tectonics, which transformed geologic thought in the last quarter of the twentieth century.
Shortly after World War II, sonar-equipped warships crisscrossed the oceans, gathering ocean-depth profiles of the seafloor underneath them. The survey data was used to create bas-relief maps of the ocean floor, and by 1953, American oceanic mapmaker Marie Tharp had created the first of many maps that revealed the presence of an underground mountain range of more than 16,000 km (10,000 miles) long in the Coast Mid-Atlantic Ridge.
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#SPJ2
pls answer this i need it
Answer:
timothy 50
jovanniel 80
PJ 100
Explanation:
tras me
What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a
velocity of 3.0 m/s?
46.6666 that is the mass number
Explanation:
14 divided 3.0
what is the amount of energy associated with a photon that has a frequency of 1000 Hz?
So, the amount of energy associated with a photon that has a frequency of 1000 Hz is [tex] \boxed{\sf{6.626 \times 10^{-31} \: J}} [/tex]
IntroductionHi ! Here, I will help you to explain the material about photon energy. Photon energy is the energy carried by electromagnetic waves as they propagate. Photon energy is generally affected on frequency (the higher the frequency value, the energy will greater too) or wavelengths (the higher value of the wavelengths, the energy will smaller). So, based on the two concepts above, this is the following equation :
By the Frequency
[tex] \boxed{\sf{\bold{E = h \times f}}} [/tex]
By the Wavelengths
[tex] \boxed{\sf{\bold{E = h \times \frac{c}{\lambda}}}} [/tex]
With the following condition :
E = foton energy (J)h = Planck constant ≈ [tex] \sf{6.626 \times 10^{-34} \: J.s} [/tex] c = the constant of the speed of light in a vacuum ≈ [tex] \sf{3 \times 10^{8} \: m/s} [/tex] m/sf = frequency of electromagnetic wave (Hz)[tex] \sf{\lambda} [/tex] = wavelength (m)Problem SolvingWe know that :
h = Planck constant ≈ [tex] \sf{6.626 \times 10^{-34} \: J.s} [/tex] f = frequency of electromagnetic wave = 1,000 Hz = 10³ Hz.What was asked :
E = foton energy = ... JStep by step :
[tex] \sf{E = h \times f} [/tex]
[tex] \sf{E = 6.626 \times 10^{-34} \times 10^3} [/tex]
[tex] \boxed{\sf{E = 6.626 \times 10^{-31} \: J}} [/tex]
ConclusionSo, the amount of energy associated with a photon that has a frequency of 1000 Hz is [tex] \sf{6.626 \times 10^{-31} \: J} [/tex]
A car driver traveling at a speed of 108km per hour ,sees a traffic light and stopped after travelling for 20seconds .Find the acceleration of the car
Answer:
– 2.5 m/s²
Explanation:
We have,
• Initial velocity, u = 180 km/h = 50 m/s
• Final velocity, v = 0 m/s (it stops)
• Time taken, t = 20 seconds
We have to find acceleration, a.
[tex]\longrightarrow[/tex] a = (v ― u)/t
[tex]\longrightarrow[/tex] a = (0 – 50)/20 m/s²
[tex]\longrightarrow[/tex] a = –50/20 m/s²
[tex]\longrightarrow[/tex] a = – 5/2 m/s²
[tex]\longrightarrow[/tex] a = – 2.5 m/s² (Velocity is decreasing) [Answer]
The formula to define the work done a particular force on an object is:
W = Fd cos 0
=
Define each variable in the formula.
w
F
d
cos 0
Answer:
W = work F = force d = distance travelled cos 0 = adjacent/hypotenuse, the cosine of the angle displaced
Explanation:
A charged particle moves at 2. 5 × 104 m/s at an angle of 25° to a magnetic field that has a field strength of 8. 1 × 10–2 T. If the magnetic force is 7. 5 × 10–2 N, what is the magnitude of the charge? 3. 7 × 10–5 C 4. 1 × 10–5 C 8. 8 × 10–5 C 1. 0 × 10–4 C.
The force acting on a moving charge is known as the magnetic force. The force acting on the charge will be 3.75 N.
What is the force exerted on the charge?Magnetic fields only exert a force on a moving electric charge. A moving charge generates a magnetic field. With an increase in charge and magnetic field strength, this force rises.
when charges have higher velocities, the force is stronger. However, the magnetic force is always perpendicular to the velocity.
Mathematically the force exerted on the charge will be
F=qvBsinα
F= force acting on the charge= 7.5 ×10⁻²
v = velocity of charge=2.5 ×10⁴
q = charge=?
B= 8.1 ×10⁻²
F=qvBsinα
[tex]\rm{q= \frac{F}{vBsina}}[/tex]
[tex]\rm{q= \frac{7.5\times 10^-2}{2.4\times 10^-2 \times 8.1\times 10^-2 sin25^0}}[/tex]
q = [tex]8.8 \times 10^ {-5}\rm C[/tex]
Hence the value of the charge will be [tex]8.8 \times 10^ {-5}\rm C[/tex].
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A rubber ball that sits motionless near the edge of a tall bookshelf has no kinetic energy. However, it does have mechanical
energy. Explain why this is possible,
It is possible because the rubber ball has mechanical energy which is equal to potential energy.
What is mechanical energy?
Mechanical energy of an object is the total energy possessed by the object, including the potential energy and the kinetic energy.
M.A = K.E + P.E
What is kinetic energy?Kinetic energy is the energy possessed by an object due to its motion.
What is potential energy?Potential energy is the energy possessed by an object due to its position.
When kinetic energy (K.E) = 0
M.A = P.E
Thus, it is possible because the rubber ball has mechanical energy which is equal to potential energy.
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Why is it important to study chemical reactions in closed containers?
Answer: becaue they can burn your body part it i important to tudy chemicals in cloed container
Explanation:
Answer:
There are plenty of reasons why. For some reactions, the system needs to be closed to avoid any alterations to the reaction. It can also be for protection, repeatability, and consistency.
What is the basis for the sounds referred to as korotkoff sounds?.
Answer:Korotkoff Sounds. -tapping sounds created by turbulent blood flow in arm. -pressure is slowly being released from cuff, so systolic pressure is above that of the cuff, but diastolic is still below, so the artery opens in systole and collapses in diastole.
Explanation:
Julia produces a 2 mA current by moving the south pole of a bar magnet into a solenoid. The solenoid contains 150 loops of wire. Which change should Julia make to generate a larger current? moving the magnet slower using more loops of wire in the coil using the north pole of the magnet setting the magnet down in the solenoid.
Julia has to increase the no of loops in the coil in order to increase the generation of current.
What is a solenoid?A solenoid is an electromagnet formed by a helical coil of wire. which generates a magnetic field when an electric current is passed through the coil.
According to Faraday's law of electromagnetic induction, the rate of change of magnetic flux linked with the coil is responsible for generating emf in the coil resulting in the vof the amount of current.
magnetic flux is defined as
Ф=NBA
[tex]EMF = \frac{d\phi}{dt} \\\\EMF = \frac{d(NBA)}{dt} \\\\[/tex]
[tex]EMF =NA \frac{d(B)}{dt} \\\\[/tex]
EMF is directly proportional to the amount of current. so that in order to increase the amount of current emf should be increasing and Emf is increased by the increasing no of the loop in the coil.
Hence Julia has to increase the no of loops in the coil in order to increase the generation of current.
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Answer:
BBBBBBBBB
Explanation:
What is the stretch when you pull with a force of 25 N on a spring with a spring constant of 8 N/m? *
0.06 m
1.28 m
3.13 m
0.12 m
Hooke's Law
[tex]\tt F=k.\Delta x[/tex]
k = spring constant
x = stretch
F = force
Input the value
[tex]\tt \Delta x=\dfrac{F}{k}=\dfrac{25}{8}=3.125\rightarrow 3.13\:m[/tex]
Which colour symbolizes passions and danger?
Answer:
i'm pretty sure it's red.
What is the frequency of a wave with a time period of 0.08
s?
O
8 Hz
O
1.25 Hz
O
12.5 Hz
Answer:
12.5 hz
Explanation: