Answer:
S = 415.64m
Explanation:
Given the following data;
Time, t = 9.21secs
Since it's a free fall, acceleration due to gravity = 9.8m/s²
Initial velocity, u = 0
To find the height of the tower, we would use the second equation of motion;
[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*9.21 + \frac {1}{2}*(9.8)*9.21^{2}[/tex]
[tex] S = 0 + 4.9*84.8241[/tex]
[tex] S = 4.9*84.8241 [/tex]
Height, S = 415.64m
Therefore, the tower is 415.64m in height.
State the career function of civil engineering
Answer:
Civil engineers design major transportation projects. Civil engineers conceive, design, build, supervise, operate, construct and maintain infrastructure projects and systems in the public and private sector, including roads, buildings, airports, tunnels, dams, bridges, and systems for water supply and sewage treatment.
The place where potential energy is zero is
a) At height equal to double the radius of the earth
b) At infinity
c) At a height equal to half the radius of the earth
d) At a depth equal to 1/3 radius of the earth
Answer:
D. At a depth equal to 1/3 radius of the earth
A motorcyclist sees a branch in the road and hits the brakes, slowing down at -6.42 m/s. if it takes him 2.85 seconds to stop, what was his starting velocity?
Use the definition of average acceleration:
a = ∆v / t
If v is the starting speed, then ∆v = 0 - v, so solve for v :
-6.42 m/s² = (0 - v) / (2.85 s)
v = (6.42 m/s²) (2.85 s)
v ≈ 18.3 m/s
Halp meeeeeeeeeeeeeeeeee
Answer:
1º all
2º 1
3º 2
4º the same
Explanation:
Could you help me please !!!
A tin of paint has a total mass of 7000g and a volume of 5000 cm³. The empty tin has a mass of 500g. Determine the mass of paint.
Answer:
6500g
Explanation:
7000 - 500 = 6500
The mass of paint will be "6500 g".
Given:
Total mass,
7000 gVolume,
5000 cm³Mass of empty tin,
500 gNow,
The mass of paint will be:
= Total mass - Mass of empty tin
By putting the values, we get
= [tex]7000-500[/tex]
= [tex]6500 \ g[/tex]
Thus the approach above is correct.
Learn more:
https://brainly.com/question/25002441
Jacob is riding his bike down a tall hill. At the top of the hill, he has 2800J of potential energy. At the bottom of the hill, when he is going the fastest, his kinetic energy measures 2650J. Which statement below is true? Question 5 options: The total amount of energy at the bottom of the hill cannot equal the amount at the top, because some of the energy is gained. The total amount of energy at the bottom is equal to the amount at the top, but some energy was converted into other forms due to friction. The total amount of energy at the bottom of the hill cannot equal the amount at the top, because some of the energy is destroyed. The total amount of energy at the bottom is equal to the amount at the top, but he gained some energy as he traveled due to a higher speed.
Answer:
D. The total amount of energy at the bottom is equal to the amount at the top, but he gained some energy as he traveled due to a higher speed.
Explanation:
The total amount of energy at the bottom is equal to the amount at the top, but some energy was converted into other forms due to friction.
Therefore the correct answer is option B.
What is mechanical energy?The sum of all the energy in motion (total kinetic energy) and all the energy that is stored in the system (total potential energy) is known as mechanical energy.
The expression for total mechanical energy can be given as follows
ME= PE + KE
As given in the problem Jacob is riding his bike down a tall hill. At the top of the hill, he has 2800J of potential energy. At the bottom of the hill, when he is going the fastest, his kinetic energy measures 2650J.
However, some energy was changed into other forms owing to friction, so the total quantity of energy at the bottom is equal to the whole amount at the top.
Thus, option B is the appropriate response,
To learn more about mechanical energy from here, refer to the link;
brainly.com/question/12319302
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what kind of magnets will attract
Answer:
Magnets are only attracted to special metals. Iron, cobalt and nickel are magnetic. Metals that have iron in them attract magnets well.
Explanation:
from Google
Answer:
Magnets can only attract some metals. These special metals are called ferromagnetic. Magnets are usually made of iron, cobalt, and nickel, which are also the ferromagnetic metals.
Explanation:
If a bicyclist travels at 15 km/hr, how long will it take her to travel 30 km?
Answer:
The answer is 2 hoursExplanation:
To find how long it took we use the formula
[tex]t = \frac{d}{v} \\ [/tex]
d is the distance
v is the velocity
From the question we have
[tex]t = \frac{30}{15} \\ [/tex]
We have the final answer as
2 hoursHope this helps you
What do signal trainees do
Answer:
A signal apprentice works for a rail company, learning the duties of a signal maintainer through on-the-job training and experience. As part of this apprenticeship, you work on a railway to assist a seasoned signal maintainer as they install, repair, inspect, and test signal equipment.
Explanation:
4. The chart shows melting and boiling points of
different substances.
Melting and Boiling Points
Substance
Alcohol
Formaldehyde
Nicotine
Benzene
Nitroglycerine
Melting Point ("C) Boiling Point ("C)
-114
78.2
-92
-19
-79
247
5.5
80
13.5
250
Which substance freezes at the lowest
temperature?
A. Alcohol
B. Nicotine
C. Formaldehyde
Answer:
The correct option is A
Explanation:
Firstly, it should be noted that the freezing point of a substance can be assumed to be melting point of that substance because a substance will normally change from liquid to solid (freezes) at the same point it changes from solid to liquid (melts). For example, water freezes at 0°C and also starts melting at 0°C.
Thus, the substance with the lowest melting point among the substances mentioned in the question is alcohol (ethanol) with the melting point of -114°C. Hence, ethanol also has the lowest freezing point thereby freezing at the lowest temperature.
4) An object is dropped from rest. After 6 seconds, what is the velocity of the object?
Hint: Use this equation and solve for the final velocity: y = gt
5) An object is dropped from rest. After 4 seconds, how far did the object fall?
Hint: Use this equation and solve for displacement: d = 12 gť
Can you solve both for me
Answer:
for question no.4,
time =6 secs
acceleration due to gravity (g)= 9.8 m/s^2
velocity=gt
=6×9.8
=58.8m ans...
for question no .5,
time taken = 4seconds
aacceleration due to gravity (g)=9.8 m/s^2
distance=12gt
=12×9.8×4
=470.4meter answer...
please help me I need this today
Answer:
42km/h
Explanation:
Change in km/ Change in time
1.4 x 100
0.033 x100
140km/3.3
= 42.4242 --> 42km/h
Brainliest Appreciated!
It takes 50 seconds for Tyler to do 450 Joules of work. How much power did Tyler use?
Answer:
Power = 450 Joules / 50 seconds = 9 J/s = 9 W *average* power
Explanation:
Power = Energy / Time ( or Work / Time) just as Velocity = Distance / Time
So, the average power needed for 50 seconds to do 450 Joules of work is simply 450 J / 50 s = 9 J/s = 9 Watts (The unit Watt is defined so that 1 Watt = 1 Joule / Second). It's important to note that 9W is the *average* power. The problem does not say that Tyler does work at a constant rate, so it's worth adding that caveat to the answer!
In order for convection to transfer heat, particles need to
absorb solar and fossil energy
circulate and move within a liquid or gas
make contact with the heat source
transmit electromagnetic waves
Answer:
the answer is b as cenvection only occurs through movement of liquids and gases
Explanation:
Answer:
the answer is b
How do you solving kinematic equations for horizontal projectiles?
A student wants to design an experiment to study the transformation of mechanical energy. Which object can be used to investigate how gravitational potential energy transforms into kinetic energy?(1 point)
a spring
a flat race car track
a slide
a rug
Answer: I think it would be a spring
Explanation: a rug, a slide, and a race track would all have friction and friction is not a conservative force which wouldn’t qualify for mechanical energy.
That’s my guess I’m not very good at this stuff though
State the career function of computer engineering
Answer:
Computer engineer duties include doing research on software and computer hardware. Designing and testing computer hardware components. Like processors, circuit boards, memory devices and routers. Writing and testing software mobile devices and computers.
Explanation:
Answer:
Computer engineer duties include: Conducting research on software and computer hardware. Designing and testing computer hardware components, such as processors, circuit boards, memory devices and routers. Writing and testing software for mobile devices and computers.
Explanation:
Intermolecular force is stronger than the kinetic energy in?
Answer:
If the average kinetic energy is greater than the attractive forces between the particles, a substance will not condense to form a liquid or a solid. If the kinetic energy is less than the attractive forces, a liquid or solid will form.
Explanation:
You travel from Point A to Point B to Point C. What is your
displacement?
7 m
3 m
4m
5 m
12 m
Answer:
12m is your displacement
Answer:
5
Explanation:
Its a shortcut from A to C........I think
how can you show that pressure increases with the increase of force?
Answer:
...........................
18. How much force would it take to push another, larger friend who has a mass of 70 Kg to accelerate
at the same rate of 4 m per sec every sec
Answer:
280N
Explanation:
f = mass x acceleration
Kinetic energy is the energy an object has due to its
Answer:
potential energy or stored energy
Explanation:
Answer:
Motion
Explanation:
Edge2021
a motorcycle starts from rest covers 200 meter distance in 6 second calculate final velocity and acceleration
Explanation:
s = ut + 1/2 a t^2
200 = 0 * 6 + 1/2 * a * (6)^2
200 = 1/2 * a * 36
200 = 18 a
a = 200/18
a= 11.1m/sec^2
v = u + at
v = 0 + 11.1 * 6
v = 66.6m/s
hope it helps you
What were the three factors that affected density
Answer:
Pressure, temperature and humidity all affect air density. And you can think of air density as the mass of air molecules in a given volume.
Explanation:
Deforestation invites natural disasters. Give reason.
Answer:
In addition to depleting resources for forest-dependent communities, deforestation is contributing to an increase in small-scale natural disasters.“That means when there's heavy rainfall, forest soil can absorb water underground and disburse it to streams.
Answer: Deforestation invites natural disasters by the following reasons:-
i) Soil erosion
ii)Landslides due to soil erosion
iii) Forest fire
iv) Flooding due to soil erosion
Hope it helped u,
pls mark this as brainliest
and put thanks
^_^
A 40 kg boy on a skateboard throws a 2 kg ball at 20 m/s to the left. How fast did the boy move to the right on his skateboard?
Acceleration measures how much the ___________ of an object changes over time.
a) velocity
b) location
Answer: velocity
Explanation: v/t
the velocity of a car changes from 5 m/s to 20 m/s in 30 sec the acceleration?
Answer:
0.5m/s2
..............
Name 2 fundamental units of SI system except that of MKS system.
The others are:
Ampere
Mol
Candela
Answer:
Ampare mole candelahope it is helpful to you
Which word fits in this sentence:
A __________ is how long it takes for one of the planets to go around the sun one time. Earth takes 365.25 days to go around the sun one time. We call this a _______.
A: revolution, year
B: year, revolution
Answer:
B because thats the answer