the friction force provided by the brakes is 30000 N.
What is friction force?Friction force is the force that opposes the motion between two bodies in contact.
To calculate the average friction force provided by the brakes, we apply the formula below.
Formula:
K.E = F'd............. Equation 1Where:
K.E = Kinetic energy of the trainF' = Friction force provided by the brakesd = distanceMake F' the subject of the equation
F' = K.E/d............ Equation 2From the question,
Given:
K.E = 8.1×10⁶d = 270 mSubstitute these values into equation 2
F' = (8.1 ×10⁶)/270F' = 30000 NHence, the friction force provided by the brakes is 30000 N
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An air track car with a mass of 5-kg and velocity of 2 m/s to the right collides with a 3-kg car moving to the left with a velocity of 3 m/s. After the collision, the two cars bounce off of each other and the 5-kg car bounces back with a velocity of 1 m/s. What is the new velocity of the 3-kg car after the collision?
Answer: 2 m/s to the right
Explanation:
This is a conservation of momentum question:
p before = p after → m1v1 + m2v2 = m3v3 + m4v4
**Note- if the speed is to the left, plug in a negative v!
5(2) + 3(-3) = 5(-1) + 3(v4) → 1 = -5 + 3v4 → v4 = +2 m/s :)
A wave traveling at 280 m/s has a wavelength of 5.2 meters. The frequency of this wave is CHOOSE ANSWER
.
This question involves the concepts of wave speed, wavelength, and frequency.
The frequency of the wave will be "53.85 Hz".
FREQUENCYThe relationship between speed, wavelength, and frequency of the wave can be given by the following formula:
[tex]v=f\lambda\\\\f =\frac{v}{\lambda}[/tex]
where,
λ = wavelength = 5.2 mv = wave speed = 280 m/sf = frequency = ?Therefore,
[tex]f=\frac{280\ m/s}{5.2\ m}\\\\[/tex]
f = 53.85 Hz
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prove that f=ma where the symbols have their usual meaning.
Explanation:
According to Newton's second law of motion:
Force is directly proportional to
Change of momentum/time taken
Change of momentum= mv-mu
where m is mass, u is initial velocity and v is final velocity. so,
F∝mv-mu/t
F∝m(v-u)/t
F∝ma (a=v-u/t)
F=kma where k is a constant
In SI units the value of k will become one so the equation will be:
F=ma
a person is able to walk 18 miles in 3 hours. what is that person’s speed? show your work.
Answer:
6 mph
Explanation:
18 divided by 3 equals 6. The person walks 6 miles per hour.
What effect did the virus have on Frank initially in the movie Osmosis Jones
Answer: But with that germ-ridden egg comes a mortal danger: Osmosis discovers Frank has really contracted a villainous and black-hearted deadly virus known as Thrax who arrives and is plotting to ultimately overheat Frank's body, killing him from the inside out!
Explain how you would figure out ifc=4 is a solution to c + 5 = 13.
Answer:
Simple, plug 4 into c.
4 + 5 = 13
Is this true, no. So therefore c is not equal to 4.
Benny has 20 jellybeans and wants to share with his friends how many will each friend get? there are 5 friends.
Answer each friend will get 3.33333 repeating if he is included. if only his friends are getting them then each one gets 4
Explanation:
devide 20/6 and 20/5 respectively.
Answer:
Yes ma’am I’m not doing it ok I’m sorry I didn’t mean to kitty you didn’t know that I was just trying to kitty kitty mama mama daddy mama mama I don’t wanna talk about it anymore I’m not gonna be mad I just got kicked out of the house I just woke me down and I’m sorry for the time you got snap I just got kicked out of the house I just woke me a text
Explanation:
If a boy does 150 J of work every 10 seconds that he pulls a wagon, how much power is he producing?
1,500 W
150 W
10 W
15 W
Answer:
15 W
Explanation:
Answer:
15 W
Explanation:
WILL GIVE BRAINLIEST
Instructions: Using what you've learned in this lesson about team building, create your own team-building activity that fosters respect, communication, and commitment within a team. Carry out this exercise with a club you belong to, a study group, a group of friends, or even family members. Video the experience if possible or write a detailed description to hand in to your teacher. Perform an Internet search for "team-building activities" for ideas. Some examples of activities are provided at the link above and there is a description below as a guide. Remember, you should submit either a video or a description, not both.
Answer:
maybe try to gather your family or friends for a board game or like a family olympics with just stuff you find in your house
This chart lists four examples of two objects that are in contact.
A 3-column table with 4 rows. The first column has entries Example 1, Example 2, Example 3, Example 4. The second column labeled Object 1 has entries fire, a metal at 80 degrees Celsius, the cool ocean, a tool with a lot of thermal energy. The third column labeled Object 2 has entries air, a metal at 12 degrees Celsius, the warm air, a material with little thermal energy.
Which statement accurately describes the flow of heat in each example?
Heat will flow from Object 1 to Object 2 in examples 2 and 4, and heat will flow from Object 2 to Object 1 in examples 1 and 3.
Heat will flow from Object 1 to Object 2 in examples 1 and 3, and heat will flow from Object 2 to Object 1 in examples 2 and 4.
Heat will flow from Object 1 to Object 2 in Example 3, and heat will flow from Object 2 to Object 1 in examples 1, 2, and 4.
Heat will flow from Object 1 to Object 2 in examples 1, 2, and 4, and heat will flow from Object 2 to Object 1 in Example 3.
Answer:
this is the answer........................
On the way down the ball Velocity is ?
A) Positive 9.8
B) Positive
C) zero
D) negative
Answer: A
Explanation: If you drop an object in the absence of air resistance, it accelerates downward at 9.8 m/s2.
How much work is done by a a 500watt blender that takes 180 seconds to crush ice
Answer:
Work done = 9 x 10⁴ J
Explanation:
Given :-
Power = 500 Watts
Time Taken = 180 seconds
To Find :-
Work Done
Formula to be used :-
Power = Work Done / Time Taken
Work Done = Power x Time Taken
Inputting the values :-
= 500 W x 180 seconds
= 90,000 J
= 9 x 10⁴ J
PLEASE HELP ASAP!! I SWEAR I'LL GIVE YOU BRAINLIEST!! (PICTURE IN QUESTION!!)
A. 55 kg
B. 72 kg
C. 48 kg
D. 61 kg
There are 2 cars that are getting ready to race. After sitting at a stoplight for 30 seconds, the light turns green and they begin to accelerate at a rate of 4m/s2. The cars were neck and neck the whole way after traveling 150 meters. How long did it take them to travel that 150 meters?
Answer:
75secondsExplanation:
Given that the acceleration of the car is
a=4m/s^2
and also the distance covered is
d=150m
from the problem "The cars were neck and neck the whole way after traveling 150 meters"
this means velocity was constant throughout
s=ut+1/2at
150=0*t+4t/2
150=2t
divide both sides by 2
t=150/2
t=75seconds
Bats, which have a high-calorie diet of insects and face little danger from predators, sleep a lot. In contrast, cows, which have a low-calorie diet and are at risk from
predators, sleep loss. What function of sleep theory do these differences support?
a. Sleep enhances immune function.
b. Sleep repairs and restores.
Oc Sleep conserves and protects.
Od. Sleep enhances learning and memory.
yers
The function of sleep theory supported by the illustration is sleep conserves and protects.
Positive impact of sleep
From the first sentence, bats sleep a lot because they face little danger from predators and as such, they have a high-calorie diet of insects.
Negative impact of sleepFrom the second sentence, cows sleep less, because they face more danger from predators and as such, they have a low-calorie diet of insects.
We can conclude that sleep helps to keep animal safe. Therefore, the correct option will be, "Sleep conserves and protects".
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_________ is the systematic self-observation and analysis of one’s conscious experience.
A.
Interrogation
B.
Introgression
C.
Internalization
D.
Introspection
Please select the best answer from the choices provided
A
B
C
D
Answer:
D:Introspection
Explanation:
Answer:
D
Explanation:
took the test got it right
Choose the word that BEST completes the following sentence:
_________________________ cannot be created or destroyed.
All
Mass
Matter
Galaxies
Stars
Hi there!
Answer:
Matter
Explanation:
To find the correct answer, you have to try all of the answers. Like below:
All cannot be created or destroyed.
This doesn't make sense.
Mass cannot be created or destroyed.
This may sound correct, but when you look at the big picture, this is wrong.
Matter cannot be created or destroyed.
This is correct because it is a saying created long ago and proven with experiments.
Galaxies cannot be created or destroyed.
This is wrong because new galaxies are being created everyday!
Stars cannot be created or destroyed.
This is wrong because like galaxies, new stars are being created everyday!
In a novel from 1866 the author describes a spaceship that is blasted out of a cannon with a speed of about 11.000 m/s. The spaceship is approximately 274 m long but part of it is packed with gunpowder, so it accelerates over a distance of only 213 m. What was the acceleration (in m/s2) experienced by the occupants of the spaceship during the launch?
Answer:
[tex]a=0.284\ m/s^2[/tex]
Explanation:
Given that,
Initially, the spaceship was at rest, u = 0
Final velocity of the spaceship, v = 11 m/s
Distance accelerated by the spaceship, d = 213 m
We need to find the acceleration experienced by the occupants of the spaceship during the launch. It is a concept based on the equation of kinematics. Using the third equation of motion to find acceleration.
[tex]v^2-u^2=2ad\\\\a=\dfrac{v^2-u^2}{2d}\\\\a=\dfrac{(11)^2-(0)^2}{2\times 213}\\\\a=0.284\ m/s^2[/tex]
So, the acceleration experienced by the occupants of the spaceship is [tex]0.284\ m/s^2[/tex].
It takes 77.4 N to push a 43.8 kg
crate at a constant speed across
flat ground. What is the
coefficient of kinetic friction?
(No unit)
Answer:
0.180
Explanation:
(Applied Force) / (Weight) = Coefficient of kinetic friction
(77.4 N) / (43.8 kg * 9.81 m/s/s) = 0.180
.180 is indeed the correct answer for acellus
State Newton's Law of cooling
[tex] \\ \\ [/tex]
(⚆﹏⚆) xD
Answer:
the rate at which an object cools is proportional to the difference in temperature between the object and the object's surroundings.
To state Newton's Law of cooling we say "According to Newton's law of cooling, the speed at which an item cools is proportional to the temperature differential between the object and its surroundings.".
What is Newton's Law of cooling?Generally, According to Newton's law of cooling, the speed at which an item cools is proportional to the temperature differential between the object and its surroundings.
In conclusion, Newton's Law of cooling applies to the temperature interaction of an object and its environment.
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A block of weight 5000 N is pushed up a slope by a force of 250 N. Assume there is no friction. Calculate:
a) the actual mechanical advantage
b) the velocity ratio
c) the length of the slope if the height of the slope is 10 m
The actual mechanical advantage, the velocity ratio, and the length of the slope if the height of the slope is mathematically given as
A=20VR=0.05x=20mWhat are the actual mechanical advantage, the velocity ratio, and the length of the slope if the height of the slope is 10 m?Question Parameters:
A block of weight 5000 N is pushed up a slope by a force of 250 N.
Generally, the equation for the actual mechanical advantage is mathematically given as
A=Fout/Fin
A=5000/250
A=20
b)
the velocity ratio is given by the distance moved by the effort divided by the distance moved by the load
Therefore
VR=250/5000
VR=0.05
c)
the length of the slope if the height of the slope is 10 m
Assume the slope is at an angle of 30
Hence
sin 30=10/x
x=20m
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Answer:
A) as you know AMA is equal to VR so the solution is 5000N/250N which is equal to 0.05with no units
HEY CAN ANYONE WRITE A POEM BOUT NEON PLS!!!!!!!!
There's a high-voltage pipe full of Neon.
That people try hard not to peon.
Some refrigerant guys
Say it would be wise
To replace all the Neon with Freon.
what is simpal machine?
Answer:
Simple machine is a machine that is simple and can be used anywhere.
Explanation:
hope this help.
folow me in the brainly yes.
If 360 Joules of work are needed to move a crate a distance of 4 meters in 5 sec, what is the power used
Answer:
72watts
Explanation:
360/5
=72watts
Tim rides at an average speed of 8 mph (mile per hour). How long does it take
for him to ride 44 miles h (show process)
Answer: 5.5 hours
Explanation: 44/8=5.5.
Answer:
5.5 Hours at 8mph to go 44 miles
Explanation:
d=s/t
t=s/d
44/8 = 5.5 time it took 5.5 hours it will take him to ride 44 miles
1.What is light?
2.How light is being measured?
3.How light is being produced naturally and artificially?
4.How light is being detected?
5.What is the difference between light and ambient?
6.What are the modes of light sensors? Explain each.
Answer:
1. light is electromagnetic radiation within the portion of electromagnetic spectrum that is perceived by the human eye.
2. it's measured in footcandles or lux- it is the amount of light (lumens) falling on a Surface (over any given square foot or square meter). therefore, light intensity is measured in terms of lumens per square foot (footcandles) or lumens per square meter (lux).
3. natural light,, which produces heat and color comes from the radiation given off by the sun. It is then filtered through the Earth's atmosphere and absorbed by plants. Artificial light sources can consist of a filament that uses electricity or halogen gas to go or an electronic device that emits light.
4. most of our conscious vision stem from photoreceptors in the retina, the light-sensitive layer at the back of our eyeball. In animals with backbones (vertebrates) cells that detect light for vision are vaguely shaped like rods or cones giving them their familiar names.
5. there is a difference between ambient and task lighting. task lighting provides focus light so you can see better perform a certain task. while ambient fixtures offer general lighting for your home, distribute light evenly as well as helps create a mood.
6. what are the types of light sensors
• photoresistors (LDR)
• photodiode (how they look like)
• phototransistors
Explanation:
I hope this helped, I'm so sorry if it didn't .
A certain resistance thermometer reads 14. 5 Ω in pure melting ice and 18. 5 Ω in steam at standard atmospheric pressure. What will be its resistance at room temperature of 27. 0 o C ?
The resistance of the thermometer at the given temperature is 15.58 ohms.
Resistance of the thermometer
The resistance of the thermometer can be determined by applying method of interpolation as shown below;
[tex]\frac{R_\theta - R_0}{R_{100} - R_0} = \frac{\theta -0}{100 - 0}[/tex]
where;
Rθ is the resistance of the thermometer at 27⁰CR100 is the resistance at steam temperatureR0 is the ice temperature[tex]\\\\\frac{R_\theta - 14.5}{18.5 - 14.5} = \frac{27}{100} \\\\\frac{R_\theta - 14.5}{4} = \frac{27}{100}\\\\100R_\theta - 1450 = 108\\\\100R_\theta = 1558\\\\R_\theta = 15.58 \ ohms[/tex]
Thus, the resistance of the thermometer at the given temperature is 15.58 ohms.
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Susan and Joe push a table 18 meters down a hall by exerting a force of 200
newtons What is the total amount of work done on the table
Answer:
50
Explanation:
Which statement describes dynamic equilibrium?
Answer:An object has balanced forces acting on it and constant velocity.
Explanation:
write the ways to induce current in a circuit?
The following are the several approaches to produce a current in a coil:
An electric current is induced in a coil when it is rapidly moved between the two poles of a horseshoe magnet.
An electric current is induced when a magnet is shifted relative to a coil.
The current in the coil may be generated by keeping it fixed and rotating a magnet within it.
A steady alteration of the current in 'another coil' kept near it in a coil might create the current...
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