Answer:
8.9*10^5
Explanation:
as we know that
K.E =1/2 mv²
where m is mass and v is velocity
given mass= 1120 kg
given velocity =40 m/s
so K.E=1/2 (1120)(40)²
K.E=1792000/2
K.E=896000
K.E=8.9*10^5
Answer:
8.9* 10^5
Explanation:
work done as mass 1 moves to mass 2. the gravitational force between two point masses separated by a distance r is proportional to
Answer:
gravitational force
While John is traveling along a straight inter-
state highway, he notices that the mile marker
reads 257 km. John travels until he reaches
the 145 km marker and then retraces his path
to the 175 km marker.
What is John's resultant displacement from
the 257 km marker?
Answer in units of km.
Answer:
Explanation:
The first displacement when the mile reading changes from 257 to 145
= 257 - 145
= 112 km
Then he turns back . This time the displacement will be negative .
The mile reading changes from 145 to 175
displacement = - ( 175 - 145 )
= - 30 km
Final displacement = 112 - 30
= 82 km .
Scientific models have two basic types. Please select the best answer from the choices provided T F
Answer:
Scientific models have two basic types. FALSE.
Hoped I helped
How long would it take a car going 50 km/h to travel 70 km ?
Answer:
Hey there!
d=rt
t=d/r
t= 70/50, or 1.4
It would take the car 1.4 hours to travel 70 km.
Let me know if this helps :)
1150 g - 0.652 kg = ______________g?
Answer:
The required answer is 498 gram
sketch a velocity time graph for the motion of the body . from the graph explain each step, calculate the total distance covered by the body
Answer: please find the attached file for the solution.
Explanation:
In a velocity time graph for the motion of the body, the total distance covered by the body is area under the graph.
Please find the attached file for the solution.
.2, A car starting from rest has an acceleration of
0.5m/s2, what will be its final velocity after 5
seconds? What distance will be covered by
the car at the end of 5 seconds?
Answer: 2.5 m/s and 6.25 m
Explanation:
u = 0
a = 0.5 m/s²
t = 5 s
v = u + at
= 0 + 0.5 × 5
= 2.5 m/s
s = ut + 1/2 at²
= 1/2 × 2.5 × 5
= 6.25 m
456.7 in scientific notation
456.7 = 4.567 x 10² in scientific notation
75 kg + 1352 g = ______________g?
Answer:
76352 g
Explanation:
Start by reducing the first quantity to grams, since a) additions can not be performed among quantities given in different units, and b) the answer is required in grams so better to express everything in grams.
75 kg = 75000 g
Then the addition becomes: 75000 g + 1352 g = 76352 g
Imagine you and a friend are trying to rearrange the furniture in your classroom. You push on a desk with a force of 150 N to the right. Your friend pushes on the same desk with a force of 50 N to the left. What is the net force on the desk
Answer:
100N
Step-by-step explanation:
If I push on a desk with a force of 150 N to the right and my friend pushes on the same desk with a force of 50 N to the left, this means that I pushed the desk in the positive x direction and the force I applied is F1 = +150N; my friend pushes the desk in the negative x direction and the applied force will be F2 = -50N.
The net force will the sum total of both forces acting on the desk.
Net force F = F1+F2
Given F1 = +150N and F2 = -50N
Net force F = +150N+(-50N)
Net force F = +150N-50N
Net force F = +100N
This answer is not mine so credits to abidemiokin
Consider three force vectors F~ 1 with magnitude 43 N and direction 38◦ , F~ 2 with magnitude 26 N and direction −140◦ , and F~ 3 with magnitude 27 N and direction 110◦ . All direction angles θ are measured from the positive x axis: counter-clockwise for θ > 0 and clockwise for θ < 0. What is the magnitude F of the net force vector F~ = F~ 1 + F~ 2 + F~ 3? Answer in units of N.
Answer:
34.70 N
Explanation:
Given :
F~ 1 = 43 N in direction 38◦
F~ 2 = 26 N in direction −140◦
F~ 3 = 27 N in direction 110◦
Therefore,
F~x = 43 cos (38) + 26 cos (-140) + 27 cos (110)
= 43 (0.7) + 26 (-0.7) + 27 (-0.3)
= 3.8
F~y = 43 sin (38) + 26 sin (-140) + 27 sin (110)
= 43 (0.6) + 26 (-0.6) + 27 (0.9)
= 34.5
so, F~ = [tex]$ \sqrt{3.8^2 + 34.5^2}$[/tex]
= 34.70 N
How do protons, neutrons, and electrons determine the properties of an atom?
Answer:
Look below
Explanation:
The number of electrons, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element. Electrons have a negative charge. Since the atom electrically neutral, the number of electrons must be equal to the number of protons. The electrons arrange themselves in energy levels around the nucleus.
Answer:
Look above
Explanation:
The number of electrons, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element. Electrons have a negative charge. Since the atom electrically neutral, the number of electrons must be equal to the number of protons. The electrons arrange themselves in energy levels around the nucleus.
Which option is a force? O A. Mass O B. Velocity O C. Acceleration O D. Weight
Answer:
The answer is D
Explanation:
The answer is D because weight has a lot of amount of force.
Answer:
the answer is D
HURRY!
Which are characteristics of a ray when it hits a boundary and reflects, but not when it hits the boundary and refracts? Check all that apply.
changes direction
changes speed
does not change direction
does not change speed
bounces off the boundary
passes through the boundary
Answer:
changes direction
changes speed
bounces off the boundary
Answer:
B. changes speed
F. passes through the boundary
Explanation:
(This Answer is correct on Edge 2021)
A. "changes direction" is INCORRECT bc while the incident ray does change direction in refraction, it also changes direction in reflection, and we require only the characteristics that are present in refraction and not reflection.
What is the kinetic energy of a 150 kg bear running at 3 m/s?
Explanation:
KE = ½ mv²
KE = ½ (150 kg) (3 m/s)²
KE = 675 J
The kinetic energy of a 150 kg bear running at 3 m/s would be 67.5 Joules.
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy
ME = KE + PE
As given in the problem we have to calculate the kinetic energy of a 150 kg bear running at 3 m/s
K.E =?
m = 150 kg
v = 3 m/s
The total kinetic energy is given by the formula
KE = 1/2mv²
By substituting the respective values in the formula of kinetic energy
K.E =?
m = 150 kg
v = 3 m/s
KE =1/2×150×3²
KE= 67.5
Thus, The kinetic energy of a 150 kg bear running at 3 m/s would be 67.5 Joules.
Learn more about mechanical energy from here
brainly.com/question/12319302
#SPJ5
Can someone help me with this motion graph please
Answer:
24 meters
Explanation:
From 0 - 4 secs. the distance traveled forward 8 meters. From 4 - 6 secs. the distance traveled another 8 meters forward. Then from 6 - 10 secs. the distance traveled backward 8 meters for a total of 24 meters.
this is a device used to change the flow of electricity through a circuit
Answer:
Transformers are devices used in electrical circuits to change the voltage of electricity flowing in the circuit. Transformers can be used either to increase the voltage or decrease the voltage.
Put a ball on the floor what forces are acting on it
Answer: Gravity
Explanation: Gravity is pulling down on the ball, making it stay on the floor
According to Newton’s third law of motion, what happens whenever one object exerts a force on a second object?
Answer:
When one object exerts a force on another object, the second object exerts the same size force on the first object
Explanation:
In a swimming meet, the swimmers swim a total of 8 laps of a 50-meter-long swimming pool. What is the distance traveled by a swimmer in this meet? What is swimmer's displacement?
Explanation:
It is given that, swimmers swim a total of 8 laps of a 50-meter-long swimming pool. We need to find the distance traveled by a swimmer in this meet.
Distance = total path covered during entire journey
In every lap he covers a distance of 50 m. It means in 8 laps it will cover 8×50 = 400 meters.
Displacement = shortest path covered
After 8 laps, the swimmer ultimately comes to the starting point. It means its displacement is equal to 0.
how will the pandemic change our life?
The fins of a car radiator are painted black because black objects are good?
Answer:
because it emits the most heat thru radiation
Three students attempt to define what it means for lines lll and mmm to be perpendicular. Can you match the teacher's comments to the definitions? Definition of perpendicular lines Teacher's comments
Incompletevquestion. However, I inferred from a general perspective about perpendicular lines.
Explanation:
Put simply, perpendicular lines are lines that are at right angles (90°) to each other. Thus, we could say based on this definition that for lines lll and mmm to be perpendicular they intersect and be at right angles (90°) to each other as found on the attached image.
Answer:
Daniela's Definition: AB is perpendicular to CD if the measure of <AOC equals the measure of <AOD.= Well Done! Because the measure of <COD...
Ori's Definition: AB is perpendicular to CD if AB and CD intercept perfectly sideways.= Please rework your ….
Kaori's definition: AB is perpendicular to CD if one line can be mapped to the other by a rotation about point O of 90 degrees.= Well done! I hadn't previously considered defining...
Explanation:
Kahn Academy
I'm taking physics and trying to figure out the 4 questions to this problem.
Answer:
Explanation:
At t = 1 velocity = 0
At t = 3 velocity = 3
slope of the line = 3-0 / 3-1 = 3/2
At t = 2
velocity = 3/2 x ( 2 - 1 )
= 1.5 m /s
velocity at t = 2 is 1.5 m /s
Position at t = 2 :
displacement at t = 2
area of graph upto t = 2
= 1 / 2 x 1 x 1.5 = .75
position at t = 2 :
= initial position + displacement
= 10 + .75 = 10.75 m
position at 6 s :
displacement at t = 6
area of curve upto t = 6
= 1 / 2 x 2 x 3 + 3 x 3 + 1/2 x 3 x ( 4.5 - 3 )
= 3 + 9 + 2.25
= 14.25 m
position at t = 6
= initial position + displacement
= 10 + 14.25 = 24.25 m
position at 9 s :
displacement at t = 9
area of curve upto t = 9
= 1 / 2 x 2 x 3 + 4 x 3 + 1/2 x 4 x ( 5 - 3 )- 1/2 x 2 x 1.5
= 3 + 12 + 4 - 1.5
= 17.5 m
position at t = 9
= initial position + displacement
= 10 + 17.5 = 27.5 m
A football coach walks 24 meters eastward, then 12 meters westward, then 36 meters eastward, and finally 22 meters westward. What is the magnitude and direction of the displacement?
Answer:
Magnitude = 26 m
Direction = eastward
Explanation:
Given that a football coach walks 24 meters eastward, then 12 meters westward, then 36 meters eastward, and finally 22 meters westward. What is the magnitude and direction of the displacement?
Let eastward be positive and westward be negative.
Magnitude = 24 - 12 + 36 - 22
Magnitude = 60 - 34
Magnitude = 26
Since the answer is positive, the direction will be eastward.
Therefore,
Magnitude = 26 m
Direction = eastward
50 POINTS
A graph of velocity versus time for an object shows a straight line with positive slope. What does that indicate about the acceleration of the object?
- the acceleration is changing
- the acceleration is zero
- the acceleration is constant and positive
Answer:
The acceleration is constant and positive
Explanation:
The straight line indicates that the acceleration is constant, while the positive slope indicates that the line is positive.
Answer:
^^^
Explanation:
You are lying on a beach, your eyes 20cm above the sand. Just as the Sun sets, fully disappearing over the horizon, you immediately jump up, your eyes now 150 cm above the sand, and you can again just see the top of the Sun. If you count the number of seconds until the Sun fully disappears again, you can estimate the Earth’s radius. But for this Problem, use the known radius of the Earth to calculate the time t.
Answer:
The time is [tex]t = 8.78 \ s[/tex]
Explanation:
From the question we are told that
The initial height of the eye is [tex]h _1 = 20 \ cm = 0.2 \ m[/tex]
The height of the eye when you jumped up is [tex]h_2 = 150 \ cm = 1.5 \ m[/tex]
An illustration of this question is shown on the first uploaded image
Generally the radius of the earth is [tex]R = 6.38*10^{6} \ m[/tex]
Now from the diagram first sun means first time you saw the sun and the second sun means second time you saw the sun then
H is the height increase when you quickly stood up which is mathematically evaluated as
[tex]H = h_2 -h_1[/tex]
[tex]H = 1.5 - 0.2[/tex]
[tex]H = 1.3 \ m[/tex]
Also [tex]\theta[/tex] i the angular displacement between the first and second position and from geometry it is also the angle at one of the sides of the right angle triangle
Applying Pythagoras theorem
[tex](R+H)^2 = K^2 + R^2[/tex]
=> [tex]R^2 + H^2 + 2RH = K^2 + R^2[/tex]
Now given that H is very small compared to R the we ignore [tex]H^2[/tex]
So
[tex]R^2 + 2RH = K^2 + R^2[/tex]
=> [tex]K = \sqrt{2RH}[/tex]
=> [tex]K = \sqrt{2 * 6.38*10^6 * 1.3 }[/tex]
=> [tex]K = 4073 \ m[/tex]
Now the [tex]\theta[/tex] is mathematically evaluated using SOHCAHTOA as follows
[tex]tan \theta = \frac{K}{R}[/tex]
[tex]\theta = tan^{-1}[ \frac{K}{R}][/tex]
=> [tex]\theta = tan^{-1}[ \frac{ 4073}{6.38*10^{6}}][/tex]
=> [tex]\theta = 0.0366^o[/tex]
Generally
[tex]1 \revolution\ around \ the\ earth = 24 \ hours = 86400 \ seconds = 360 ^o[/tex]
So
[tex]\frac{\theta}{360} = \frac{t}{86400}[/tex]
=> [tex]\frac{0.0366}{360} = \frac{t}{86400}[/tex]
=> [tex]t = 8.78 \ s[/tex]
A car is traveling South on I-85. It travels between two exits that are 5.40 km apart in 4.85 minutes. What is the average velocity of the car in m/s?
Answer: 18.56 m/sec
Explanation:
Average velocity =distance/time=5400/(4.85*60)=18.56 m/sec
Un bloque de 30.0 kg esta sobre un plano inclinado 28 grados con respecto a la horizontal, si el coeficiente de fricción cinética es 0.200, calcula la fuerza paralela al plano que se debe ejercer sobre el bloque para que suba con velocidad constante.
Responder:
229.17NExplicación:
Las fuerzas que actúan paralelas al plano son la fuerza de movimiento y la fuerza de fricción.
La fuerza de movimiento Fm = Wsinθ y la fuerza de fricción Ff = nR donde;
W es el peso del objeto = mg = 30.0 * 10
W = 300N
θ es el ángulo de inclinación = 28 °
n es el coeficiente de fricción = 0,20
R es la reacción normal = Wcosθ
La fuerza paralela al plano que se debe ejercer sobre el bloque para que se eleve con rapidez constante será la suma de la fuerza de movimiento y la fuerza frictioal (son las dos fuerzas que empujarán el cuerpo hacia arriba del plano)
Fuerza total requerida = Fm + Ff
Fuerza total requerida = Wsinθ + n (Wcosθ)
Fuerza total requerida = 300sin28 ° + 0.2 (300cos28 °)
Fuerza total requerida = 140,84 + 52,98
Fuerza total requerida = 229.17N
Por tanto, la fuerza paralela al plano que se debe ejercer sobre el bloque para que se eleve con rapidez constante es aproximadamente 229,17 N
Which material will displace a volume of water? Which material will displace a volume of water less than its own volume? Which material will displace a volume of water equal to its own volume? Which material will displace a volume of water greater than its own volume?
Answer:
1. all of them
2. cork and wax
3. iron, lead, and aluminum
4. none of them
Explanation:
1.Which material will displace a volume of water? all of them
When an object is introduced into a container with a volume of water, a volume of liquid equal to the volume of the object is displaced
2.Which material will displace a volume of water less than its own volume?
cork and wax
because the density of the object is less than that of the displaced liquid
3.Which material will displace a volume of water equal to its own volume?
iron, lead, and aluminum
because Arquimedes's principle: any body plunged inside a fluid in this case water experiences an ascending force called push, equivalent to the weight of the fluid removed by the body
4.Which material will displace a volume of water greater than its own volume?
None of them
Answer:
1. all of them
2. cork and wax
3. iron, lead, and aluminum
4. none of them
Explanation: