The work the truck engine did during the 2 hour period is 8.1 × 10⁹ J
WorkFrom the question, we are to determine how much work the truck engine did
Work is given by the formula
Work = Force × Distance
First, we will determine the distance traveled by truck
From the formula,
Distance = Speed × Time
From the given information
Speed = 45 m/s
Time = 2 hours = 2×60×60 = 7200 secs
Then,
Distance = 45 × 7200
Distance = 324000 m
Now, for the work done
Work = Force × Distance
From the given information,
Force = 25 kN = 25000 N
Therefore,
Work = 25000 × 324000
Work = 8.1 × 10⁹ J
Hence, the work the truck engine did during the 2 hour period is 8.1 × 10⁹ J
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A 30 cm scale has one end broken. The mark at the broken end is 2.6 cm. How would you use it to measure the length of your pencil
pls tell correct ans
Answer:
the mark of the broken end is 2.6 cm so, we use the scale from the next full mark i.e. 3cm
Explanation:
we now measure the length of the pencil by keeping the 3 cm mark of the scale at it's left end.
The 3 cm value is then subtracted from the scale reading at the right side end of the pencil to obtain the correct length of the pencil. ✏️
(i i ) place the scale in the contact with object along it's length
(2) Your eyes must be exactly in front of the point where the measurements to be taken.
Hope_it_helps_mga_ka_joiners_mwehehe
how do chemical factors in the environment affect human health?
Answer:
A number of specific environmental issues can impede human health and wellness. These issues include chemical pollution, air pollution, climate change, disease-causing microbes, lack of access to health care, poor infrastructure, and poor water quality.
Explanation:
hope it will help you have a great day bye and Mark brainlist if the answer is correct
[tex]kai6417[/tex]
#carry on learning
kinetic energy is _____ proportional to the ____ velocity
directly amount
directly square
directly cube
inversely square
Answer:
Kinetic energy is DIRECTLY PROPORTIONAL TO MASS AND VELOCITY
what is the word when 2 waves meet and affect each other
Answer:
wave interference
Explanation:
Wave interference is the phenomenon that occurs when two waves meet while traveling along with the same medium. The interference of waves causes the medium to take on a shape that results from the net effect of the two individual waves upon the particles of the medium. To begin our exploration of wave interference, consider two pulses of the same amplitude traveling in different directions along with the same medium.
Which one of the pictures below shows no work being done?
Select one:
a. The man trying to move the elephant.
b. The girl moving the wagon.
c. The same amount of work is being done.
d. Neither picture shows work being done.
Answer:
A
Explanation:
No motion, no work.
The formula is W = F * d. If d is 0 then the work is 0.
I misread the original question. The elephant is not going anywhere soon. The girl is moving.
So the answer is A
Answer:
Option A
The man trying to move the elephant.
Explanation:
In the given picture we can see that
“Man unable to move elephant”“A girl moving a wagon”We know that
Work done = Applied Force × DisplacementHere,
The girl is moving a wagon that means it displaces
So
W = F • d (distance be x)
W = Fx
Here, It shows work done
Now,
Man unable to move elephant that means it doesn't displaces, d = 0
So,
W = F • d (here d = 0)
W = F • 0
W = 0
Here, It shows no work done.
-TheUnknownScientist 72
FOR THOSE SMARTIES!!
calculate the total efficiency of a device that uses two components with efficiencies of 87% ans 64%.
a. 56%
b. 1.4%
c. 151%
Answer:
the answer is C on edu I got it right
What is the speed of a 0.15-kg baseball whose kinetic
energy is 77 J?
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) Calculate tension force in the string if the system accelerates up an inclined plane at 4m/s²
2) Calculate the magnitude of F if the system moves up the inclined plane at a constant velocity
1) As long as there is tension in the string connecting the two objects, they will both accelerate together with the same acceleration, 4 m/s². By Newton's second law,
• the net force on the 3-kg object acting parallel to the incline is
∑ F = F - T - f₃ - 3g sin(30°) = (3 kg) (4 m/s²)
• the net force on the 3-kg object perpendicular to the incline is
∑ F = n₃ - 3g cos(30°) = 0
• the net parallel force on the 6-kg object is
∑ F = T - f₆ - 6g sin(30°) = (6 kg) (4 m/s²)
• and the net perpendicular force on the 6-kg object is
∑ F = n₆ - 6g cos(30°) = 0
From the last two equations, it follows that
n₆ = 6g cos(30°) ≈ 50.9223 N
f₆ = 0.2 n₆ ≈ 10.1845 N
T - f₆ - 6g sin(30°) = 24 N ⇒ T ≈ 63.5845 N ≈ 64 N
2) If the objects are pulled up the incline with constant velocity, then the acceleration of either object is zero. The free body diagrams stay the same, so we have the same equations using Newton's second law, the only difference is that each right side is zero.
The new tension in the string is then
T - f₆ - 6g sin(30°) = 0 ⇒ T ≈ 39.5845 N
From the second equation above, we find
n₃ = 3g cos(30°) ≈ 25.4611 N
f₃ = 0.1 n₃ ≈ 2.5461 N
Then in the first equation,
F - T - f₃ - 3g sin(30°) = 0 ⇒ F ≈ 56.8306 N ≈ 57 N
The electricity received at an electrical substation has a potential difference of 20,000 V. What should the ratio of the turns of the step-down
transformer be to have an output of 500 V?
Help plzzz
The turn ratio of the transformer is 40.
What is a transformer?A transformer is an electrical device that is used to step up or step down voltage.
The formula for calculating the turns ratio of a transformer is given below.
Formulaa = V/v.......... Equation 1Where:
V = Primary voltagev = Secondary voltagea = Turns ratio of the transformerFrom the question,
Given:
V = 20000 Vv = 500 vSubstitute the values above into equation 1
a = 20000/500a = 40.Hence, The turn ratio of the transformer is 40.
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when energy looks like it has been used up, what really happens to it?
Answer:
hope that helps
Explanation:
Where does energy go once used? Nothing happens to the energy
18. The diagram below shows three flasks with three different liquids in each of them. hot water initial level of the liquid Liquid A Liquid B Liquid C The volume and temperature of the liquids in the flask are the same. All three flasks were placed inside a hot water trough. The level of the liquids increases. (a) (b) Why does the level of the liquids rises up? The liquids gain heat from the hot water, expand and move upwards Different liquids rises to a different level after heating. Explain the reason. Different liquids expand by different amounts when beated by the same temperature (c) Give one application of this expansion.
Different liquids have different rates of expansion. I think we can fairly say that (most) substances expand when heating because they vibrate more, because they have more kinetic energy, so there's a pushing force between molecules. For almost the same reason, gasses expand.The change in volume us independent of the original mass but depends on original volume.
A mercury thermometer is based on the application of thermal expansion of liquids. The bulb of the thermometer is kept in contact with a hot body, and mercury expands and level of mercury rises in the tube
◌⑅⃝●♡⋆♡MICKZMINNZ♡⋆♡●⑅◌
a 35 kg chair is lifted 5M off the ground. what is the potential energy?
Answer:
mass × gravity ×height. so....that.. Ep = mgh. Ep= 35×9.8×5. Ep = 1715.
Explanation:
What kinds of effects can humans have on food webs in ecosystems?
When my phone is plugged into a 120 Volt outlet, it takes 20 minutes to fully charge it with 32kJ of energy.
How much current if flowing through the charging cord?
A) 0.13 Amps
B) 0.22 Amps
C) 0.33 Amps
D) 0.64 Amps
E) 13 Amps
F) 22 Amps
G) 33 Amps
H) 64 Amps
There is only one answer, please help!
The Current flowing in the charger is 0.22 Amps.
Energy consumed
The energy consumed by the phone is calculated using the following relationship.
E = IVt
where;
I is the current flowingV is the voltaget is the timeCurrent flowing in the chargerThe Current flowing in the charger is calculated as follows;
[tex]I = \frac{E}{Vt} \\\\I = \frac{32,000}{120 \times (20 \times 60 )} \\\\I = 0.22 \ Amps[/tex]
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Without the Moon, when would high tide happen every day?
Question 4 options:
midnight
3am
noon
3pm
high tide will appear on noon
The image above shows two opposite forces acting on a rope, what can we say is true about the affect
of the forces on the rope? (SBP3.b)
A It cannot be determined without knowing which man is stronger.
B) It cannot be determined because one man is standing taller than the other.
C) The forces are unbalanced, and net force on the rope moves it to the left.
D) The forces are unbalanced, and net force on the rope moves it to the right.
I have done before and the answer is c
In which situation is the speed of the car constant while its velocity is changing?
A) The car travels down a straight track at 30
B) The car travels around a circular track at 30
a
) The car begins from rest and accelerates to 20
m
2015
D) The car begins traveling at 30
m
and slows to 15 m
S
S
Answer:
B, the car travels around a circular track at 30 m.
Explanation:
LAST QUESTION FOR MY FINALS
How far does a model rocket accelerating at +40m/s^2 go in 2 seconds if launched from rest?
Apply second equation of kinematics
[tex]\\ \tt\longmapsto s=ut+\dfrac{1}{2}at^2[/tex]
[tex]\\ \tt\longmapsto s=\dfrac{1}{2}(40)(2)^2[/tex]
[tex]\\ \tt\longmapsto s=20(4)[/tex]
[tex]\\ \tt\longmapsto s=80m[/tex]
Answer:
According to the Given Statement
Acceleration a of model rocket is + 40m/s²
Time for the rocket accelerate t is 2 s
Its initial velocity u is 0m/s ( it is at rest )
We have to calculate the height attained by rocket .
Using Kinematic Equation
h = ut + ½ at²On substituting the value we obtain
➥ h = 0×2 + ½ × 40 × 2²
➥ h = 0 + 20 × 4
➥ h = 80m
So, the height attained by the rocket is 80 metres.
in your own words how does accomplish your goals influencing athletes?
Answer:
Goal setting can improve performance, influence motivation, and help athletes reach their potential. It can influence athletes by motivating them to work harder
Explanation:
Which material is a good conductor of electricity?.
Answer:
Copper
Explanation:
Copper, its ne of the most used materials because of their ability to be the best conductors. Other materials that are sometimes used as conductors are silver, gold, and aluminum.
At what angle do the cars move after the collision?
Answer:
his results in the final angle after the collision of 37.2 degrees basically what we did there is turn the vector into a right triangle. We use sohcahtoa to solve for the angle. Being.
Explanation:
If the actual mass of a marble is 3.53 g, and you measured it to be 3.22 g, is your measurement accurate?
Please help me as quickly as possible.
Answer:
sorry no idea
Explanation:
I wish I could help
Does sunlight make plants live
Answer:
yes!
Explanation:
Adolescents develop what is referred to as a(n) __________, which is why they struggle with social relationships during this stage of development. A. Personal invincibility B. Increased sensitivity C. Self-perception D. Imaginary audience Please select the best answer from the choices provided A B C D.
Answer:
imaginary audience
Explanation:
makes adolescence more self-conscious
Which of the following is a correct
definition of the word "contingencies"?
Answer:
I already told ya
Explanation:
i got brainly so i could learn
What physical quantity describing motion does the driver neglect when he/she practices tailgating? [Choices: distance, displacement, speed, velocity or acceleration]
The physical quantity that is neglected when practicing tailgating is :
Distance TailgatingTailgating is the act of driving or following a vehicle very closely and this can be very dangerous as well, during this act the distance between the vehicles is been neglected by the driver.
Distance is the difference in position of an object with time in respect to another object. ( i.e It is a scalar quantity ).
Hence we can conclude that the physical quantity that is neglected when practicing tailgating is Distance.
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8. Early in the Morning, an object's shadow will extend to the North. * True False
False-
I orignally had it at "true" BUT I was actually wrong.
The mechanical advantage of a machine is 4• What does it mean?
The mechanical advantage of a machine is 4. It means that your effort is multiplied 4 times.
A spherical glass ornament is 6 cm in diameter. If an object is placed 10.5 cm away from the ornament, where will its image form? What is the magnification?
The magnification is mathematically given as
M= 0.125
Lens magnificationQuestion Parameters:
A spherical glass ornament is 6 cm in diameter.
If an object is placed 10.5 cm away from the ornament, where will its image form
Generally, the mirror equation for ornament is mathematically given as\
1/q = 2 / r - 1/p
Therefore
1/q = 2 / (-3 cm) - 1/(10.5 cm)
q = -1.31 cm
Therefore, the magnification
M = -q/p
M= -(-1.31 m)/ (10.5 cm)
M= 0.125
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