Answers
Answer:
t = 3.3 s and V = 15 m/s
Explanation:
Given that,
Distance covered by the car, d = 50 m
Initial speed, u = 5 m/s
Final speed, v = 25 m/s
Firstly we can find the acceleration of the car using third equation of motion. i.e.
[tex]v^2-u^2=2as\\\\a=\dfrac{v^2-u^2}{2d}\\\\a=\dfrac{(25)^2-(5)^2}{2(50)}\\\\a=6\ m/s^2[/tex]
Let t is the time taken by the car to occur this.
[tex]t=\dfrac{v-u}{a}\\\\t=\dfrac{25-5}{6}\\\\t=3.3\ s[/tex]
Let v is the average velocity of the car. It can be calculated as follows :
[tex]V=\dfrac{u+v}{2}\\\\V=\dfrac{25+5}{2}\\\\V=\dfrac{30}{2}\\\\V=15\ m/s[/tex]
So, the time taken by the car to occur this is 3.3 seconds and the average velocity of the car is 15 m/s.
Related Questions
What kind of waves occur when the motion of the medium is parallel the the wave direction
Answers
Answer:
A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves.
Explanation:
hope this helped
A ferris wheel with radius r rotates freely about its central
point with initial angular speed wi. A cart on the end
moves at linear speed 2v.
Suddenly, the ride deaccelerates so the cart moves with
speed v. The final angular speed is Of.
How does the angular speed of the ferris wheel
change?
Choose 1 answer:
Answers
Answer:
decreases by 2
Explanation:
The angular speed of the ferris wheel decreased by a factor of 2.
Angular speedThe angular speed of an object is the rate of change of angular displacement with time.
Relationship between angular speed and linear speedv = ωr
[tex]r = \frac{\omega }{v} \\\\\frac{\omega_1 }{v_1} = \frac{\omega_2 }{v_2} \\\\\omega_2 = \frac{\omega _1 v_2}{v_1} \\\\\omega _2 = \frac{\omega _i \times v}{2v} \\\\\omega _2 = \frac{1}{2} (\omega _1)[/tex]
Thus, the angular speed of the ferris wheel decreased by a factor of 2.
Learn more about angular speed here: https://brainly.com/question/6860269
A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.
So were do you go if you get sucked into a black hole? What happens to Your body? Do you travel to another solar system?
Answers
Answer:
I think you would die instantly-
Explanation:
wouldnt the air force be to much and your insides will be like jelly?? and wouldnt you snap in to your something? or am i wrong??
Which term describes this diagram
A. food web
B.trophic level
C. Food chain
D. Matter cycle
Answers
Answer:
the answer is letter; C
Explanation:
change 200km/hr into m/sec
Answers
Answer:
200km/hr=55.55m/sec
Explanation:
200km/1hr×1000m/1km×1hr/3600sec=200,000/36000
Question 5
2 pts
(04.03 MC)
Which types of changes must follow the law of conservation of mass? (2 points)
O Both physical and chemical changes
Neither physical nor chemical changes
O Only physical changes
O Only chemical changes
Answers
Answer:
A Both physical and chemical changes.
Explanation:
I need help y’all
Help me out
Answers
Answer:. 4+5+34+34+44+53 equals174 divide by 6 equals 29 hope this helps ®:]©™
Explanation:
This type of bike tire is thinner, lighter, more expensive, and punctures easily.
Answers
If a device uses mains electricity at 230v and has a 13a fuse in the plug wht is the maximmum power it can safley use?
Answers
Answer:
2990W
Explanation:
Given parameters:
Voltage = 230V
Current = 13A
Unknown:
Maximum power it can safely use = ?
Solution:
To solve this problem;
Power = Current x Voltage
Power = 230 x 13 = 2990W
Explain what was ultimately responsible for London’s “killer fog” in 1952.
Answers
Answer:
possible answer from edge
Explanation:
After World War II the only coal available to burn residentially, either for cooking or warmth, was of poor quality and contained large amounts of contaminants that made its fumes toxic. So when millions of homes in London burned this low quality coal and the local atmosphere over and around London stagnated, there was nowhere for the fumes to go. This stagnation allowed the toxic coal fumes to build up until they became physically harmful to humans and animals.
Burning of low quality coal was ultimately responsible for London’s “killer fog” in 1952.
What is Coal?This is a type of sedimentary rock which is combustible and contain high amounts of carbon and hydrocarbon.
The low quality coal contained a lot of contaminants which was released into the atmosphere thereby creating the “killer fog” which adversely affected residents.
Read more about Coal here https://brainly.com/question/22647554
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The pressure of a liquid at the 10.2 meters depth is 80100 Pascal. - What is the density of the fluid in kg/cubic meter?
Answers
Answer:
8165.138kg/cubic meter
Explanation:
Pressure= 80100 Pascal.= 1N/m^2
Height=10.2 meters
density of the fluid in kg/cubic meter= ?
g=acceleration due to gravity= 9.81m/s^2
The pressure of a system can be calculated using the expression below
P = ρ g h
Where
p =pressure,
h =depth of the liquid,
ρ = density of the liquid,
g = acceleration due to gravity.
If we substitute those values we have
80100 1N/m^2= ρ × 9.81m/s^2
ρ= 80100/9.81
ρ=8165.138kg/cubic meter
Hence, the density of the fluid in kg/cubic meter is 8165.138kg/cubic meter
Plz help me
A negative charge of-3.0Cand a lositive charge of 3.0 Care separated by 1m, What is the force between the two
charges?
A negative charge of -0,5 Cexerts a repelling force of 10.0 N on a second charge that is 0.5m away. What is the sign
and magnitude of the second charge?
R21
Answers
Answer:
sign of the other charge is -ve
PLEASE HELP!!
Find the change in temperature of each sample after the hot water was added. Fill in the table with the data you collected
in parts C and D. To find the change in a sample's temperature, subtract the starting temperature from the ending
temperature.
Answers
Answer:
Sample Starting Temperature Ending Temperature Change in Temperature
50 g sand
50 g water
100 g water
Explanation:
Its
20C
32C
46C
Answer:
Explanation:
Helppp me obi-wan canobi. you are my only hope ;) hehe
Answers
Answer:
A
Explanation:
Answer:
A.
Explanation:
The coefficient of kinetic friction between an object and the surface upon which it is sliding is 0.46. The weight of the object is 90N. What is the force of friction?
Answers
Answer:
the friction force is 41.4N
Explanation:
from f=μ R, where R is the normal reaction. this is equal to the weight of the object
therefore, f = 0.46*90 = 41.4 N
Solar energy and hydroelectric energy are important sources of energy. Find out more about either one of these forms of energy. What is being done to make it a more efficient source of energy, and where it is being used in the United States?
Answers
Answer:
Question: Find out more about either one of these forms of energy
Answer:
Solar energy: This is energy generated from the sunlight, and it can be converted to other energy that can be useful. Solar energy from the sun considered a clean source of electricity can be converted to a usable electricity source or stores the light in batteries for thermal use. This energy conversion is possible through the use of solar panels attached to where the conversion would take place so as to capture the light from the sun.
Question: What is being done to make it a more efficient source of energy
Answer:
1. When using solar energy to power homes, it is more efficient to have panels on a green roof because of the characteristics of this roof not to reflect or lose more light from the sun.
2. Improvements on the type of solar cell to use for instance that are cheaper and could maximize the energy from the sun are all ways that make it more efficient.
3. Since solar panels don't produce energy at night, usage of batteries that could store electricity during the day or when the sun is not obscured would make solar more efficient.
Question: where it is being used in the United States?
Answer:
1. California
2. Nevada
3. New York
4. Texas
Which of the best describes a solution
Answers
1).A mixture having a uniform composition where the components can't be seen separately and all components are in the same state best describes a solution. In chemistry, a solution is a homogeneous mixture composed of two or more substances.
A sound wave traveling through dry air has a frequency of 16 Hz, a wavelength of 22 m, and a speed of 350 m/s. When the sound wave passes through a cloud of nitrous oxide, its wavelength changes to 16 m, while its frequency remains the same. What is its new speed? (The equation for the speed of a wave is v= f x 1.)
A. 350 m/s
B. 16 m/s
C. 5,600 m/s
D. 256 m/s
It's D
Answers
Answer:
D. 256 m/s
Explanation:
[tex]f[/tex] = Frequency of the wave = [tex]16\ \text{Hz}[/tex]
[tex]\lambda[/tex] = Wavelength = [tex]16\ \text{m}[/tex]
Speed of a wave is given by
[tex]v=f\lambda[/tex]
[tex]\Rightarrow v=16\times 16[/tex]
[tex]\Rightarrow v=256\ \text{m/s}[/tex]
The speed of the wave as it passes through the cloud of nitrous oxide is [tex]256\ \text{m/s}[/tex].
Answer:
D. 256 m/s
Explanation:
d. d as in dog
Please I need help with this question (see image).
Show workings if necessary
Answers
When an athlete perspires after running
Evaporation occurs and helps to cool the body.Convection cools the body.The body absorbs cold from the surrounding air.Heat is conducted away from the body.Answer :When an athlete perspires after running evaporation occurs and helps to cool the body.
Correct option is A.
Explanation :When an athlete perspires after running then sweat evaporates and we know that evaporation causes cooling as evaporation requires heat energy. The required heat energy is taken away by the molecules of sweat when they convert from liquid into gas, and this causes cooling on the surface of body. That's why it helps to cool the body.
A wooden block has a mass of 12 kg and is experiencing a force of 6 N. Calculate the acceleration that the wooden block will experience. Give your answer to ONE DECIMAL PLACE.
Answers
f = m•a
a = f/m
a = 6N / 12 kg
a = 0.5 m/s
therefore the block is experiencing an acceleration of 0.5 m/s.
Which two terms describe salt (NaCI)
Answers
Answer:
Sodium chloride, regular table salt, is also known as the mineral halite.
...
Follow-Up Questions:
Find sodium and chlorine on The Periodic Table of the Elements. ...
NaCl is known as an ionic compound. ...
Chlorine is known as a diatomic molecule.
A race car is accelerating at 5m/s and then speeds up to a final velocity of 12 m/s if the race car driver finished this let of the race in 6 seconds what was the car's acceleration
Answers
Answer:
the acceleration of the car is 1.167 m/s²
Explanation:
Given;
initial velocity of the race car, u = 5 m/s
final velocity of the race car, v = 12 m/s
time to finish the race, t = 6 s
The acceleration of the car is calculated as;
a = (v - u) / t
a = (12 - 5) / (6)
a = 1.167 m/s²
Therefore, the acceleration of the car is 1.167 m/s²
Answer:
1.167 m/s^2
Explanation:
Given that a race car is accelerating at 5m/s and then speeds up to a final velocity of 12 m/s if the race car driver finished this let of the race in 6 seconds what was the car's acceleration ?
From the question, the following parameters are given
Initial velocity U = 5 m/s
Final velocity V = 12 m/s
Time t = 6 s
According to the definition of acceleration:
Acceleration = change in velocity per time taken.
I.e
Acceleration =( V - U)/ t
Acceleration =( 12 - 5 )/6
Acceleration = 7/6
Acceleration = 1.167 m/s^2
Therefore, acceleration is 1.167 m/s^2
Which statement about force is incorrect
A. Some forces cause objects around us to move.
B. Some forces keep objects around us from moving
C. Force is the ability to change motion and transfer matter.
D. Force causes changes in the motion and energy of matter.
Answers
Answer:
I don't know sorry brother/sister
Explanation:
please mark as brilliant
Earth's gravity is pulling a ball downward toward Earth. What is the reaction force?
Answers
Answer: Air resistance is "pushing" the ball upwards.
Explanation:
A boy rides a sled down a steep, snow.covered hill. Which of
the following takes place during the child's ride?
a
Potential energy decreases and kinetic energy
increases.
Need a Hint?
b
Potential energy increases and kinetic energy
decreases
c Both kinetic and potential energy increase.
Answers
Answer:
a. Potential energy decreases and Kinetic energy increases
Explanation:
Because as he comes down due to its steepness the speed of the boy or you can say his KE increases and since he comes from a high position (hill) to the lower ground his potential energy decreases simultaneously
Answer:
Potential energy decreases and kinetic energy increases.
Explanation:
That was the answer on my CK12
To remove a nut from an old rusty bolt, you apply a 100-N force to the
end of a wrench perpendicular to the wrench handle. The distance from
the applied force to the axis of the bolt is 25 cm. What is the torque
exerted on the bolt in N-m?
Answers
Answer:
yes its 25cmjdj8dnen8dnejdid
A penny is dropped off the top of the Stratosphere from rest and falls freely with the
acceleration due to gravity (9.81 m/s2). After 5 seconds, how far has it fallen (Ax)?
Answers
Answer:
S = 122.5m
Explanation:
Given the following data;
Acceleration due to gravity = 9.8m/s²
Time, t = 5 seconds
Since it's a free fall, initial velocity, u = 0
To find the displacement, we would use the second equation of motion given by the formula;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Where;
S represents the displacement or height measured in meters. u represents the initial velocity measured in meters per seconds. t represents the time measured in seconds. a represents acceleration measured in meters per seconds square.Substituting into the equation, we have;
[tex] S = 0*5 + \frac {1}{2}*(9.8)*5^{2}[/tex]
[tex] S = 0 + 4.9*25[/tex]
S = 122.5m.
Is steam gas? If not what is?
Answers
Answer:
steam is a gas
Explanation:
Answer: Steam is an invisible gas, unlike water vapor, which appears as a mist or fog.
Explanation:
Help!
In a school zone, speeding fines?
A. are the same.
B. are doubled.
C. are tripled.
Answers
Which device uses a rotating electric power source to produce a magnetic field?
A. a motor
B. A step-up transformer
C. A step-down transformer
D. A generator
Answers
Answer:
A. a motor
Explanation:
A motor is an electrical device or machine that converts electrical energy into mechanical energy. That is, a motor takes electrical energy to produce motion. There are different types of motors such as DC motor, induction motor and so on.
When electrical current flows through a coil, a magnetic flux is been produced, therefore when a rotating power source is supplied to coil of a motor, a magnetic field is produced which causes torque.
Answer:
A: Motor.
Explanation:
It’ll be a motor because motors use rotating electric power sources to produce magnetic fields.