Answer:
she can travel 24000 meters she cant reach the store she can get as much as 125 miles
Explanation:
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
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.
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
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
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.
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
What energy is directly dependent upon velocity and mass?
A mechanical energy
O B. total energy
C. potential energy
O D. kinetic energy
Answer:
Kinetic energy
Explanation:
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
Which of the following is an example of a primary source?
A. Scientific journal
B. Dictionary
C. Encyclopedia
D. Newspaper
Answer:
scientific journal
in my guess
Answer:
scientific journalExplanation:
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:
You walk 20 feet. What is this distance in centimetres? 0.305 m 100 cm ----------- ----------- 1 ft 1 m
Answer:
609.6 cm is the answer
Convert 8.1 kilograms to grams
Answer:
8100 g
Explanation:
8.1 kg × 1000
= 8100 g
Answer:
8,100 Grams
Explanation:
To change Kilograms to Grams, you multiply the mass value by 1000.
So, 8.1kg x 1000 = 8,100g.
Hope this helps!
Effciency of a lever is never 100% or more. why?Give reason
Answer:
Ideally, the work output of a lever should match the work input. However, because of resistance, the output power is nearly always be less than the input power. As a result, the efficiency would go below [tex]100\%[/tex].
Explanation:
In an ideal lever, the size of the input and output are inversely proportional to the distances between these two forces and the fulcrum. Let [tex]D_\text{in}[/tex] and [tex]D_\text{out}[/tex] denote these two distances, and let [tex]F_\text{in}[/tex] and [tex]F_\text{out}[/tex] denote the input and the output forces. If the lever is indeed idea, then:
[tex]F_\text{in} \cdot D_\text{in} = F_\text{out} \cdot D_\text{out}[/tex].
Rearrange to obtain:
[tex]\displaystyle F_\text{in} = F_\text{out} \cdot \frac{D_\text{out}}{D_\text{in}}[/tex]
Class two levers are levers where the perpendicular distance between the fulcrum and the input is greater than that between the fulcrum and the output. For this ideal lever, that means [tex]D_\text{in} > D_\text{out}[/tex], such that [tex]F_\text{in} < F_\text{out}[/tex].
Despite [tex]F_\text{in} < F_\text{out}[/tex], the amount of work required will stay the same. Let [tex]s_\text{out}[/tex] denote the required linear displacement for the output force. At a distance of [tex]D_\text{out}[/tex] from the fulcrum, the angular displacement of the output force would be [tex]\displaystyle \frac{s_\text{out}}{D_\text{out}}[/tex]. Let [tex]s_\text{in}[/tex] denote the corresponding linear displacement required for the input force. Similarly, the angular displacement of the input force would be [tex]\displaystyle \frac{s_\text{in}}{D_\text{in}}[/tex]. Because both the input and the output are on the same lever, their angular displacement should be the same:
[tex]\displaystyle \frac{s_\text{in}}{D_\text{in}} =\frac{s_\text{out}}{D_\text{out}}[/tex].
Rearrange to obtain:
[tex]\displaystyle s_\text{in}=s_\text{out} \cdot \frac{D_\text{in}}{D_\text{out}}[/tex].
While increasing [tex]D_\text{in}[/tex] reduce the size of the input force [tex]F_\text{in}[/tex], doing so would also increase the linear distance of the input force [tex]s_\text{in}[/tex]. In other words, [tex]F_\text{in}[/tex] will have to move across a longer linear distance in order to move [tex]F_\text{out}[/tex] by the same [tex]s_\text{out}[/tex].
The amount of work required depends on both the size of the force and the distance traveled. Let [tex]W_\text{in}[/tex] and [tex]W_\text{out}[/tex] denote the input and output work. For this ideal lever:
[tex]\begin{aligned}W_\text{in} &= F_\text{in} \cdot s_\text{in} \\ &= \left(F_\text{out} \cdot \frac{D_\text{out}}{D_\text{in}}\right) \cdot \left(s_\text{out} \cdot \frac{D_\text{in}}{D_\text{out}}\right) \\ &= F_\text{out} \cdot s_\text{out} = W_\text{out}\end{aligned}[/tex].
In other words, the work input of the ideal lever is equal to the work output.
The efficiency of a machine can be measured as the percentage of work input that is converted to useful output. For this ideal lever, that ratio would be [tex]100\%[/tex]- not anything higher than that.
On the other hand, non-ideal levers take in more work than they give out. The reason is that because of resistance, [tex]F_\text{in}[/tex] would be larger than ideal:
[tex]\displaystyle F_\text{in} = F_\text{out} \cdot \frac{D_\text{out}}{D_\text{in}} + F(\text{resistance})[/tex].
As a result, in real (i.e., non-ideal) levers, the work input will exceed the useful work output. The efficiency will go below [tex]100\%[/tex],
843 L - 0.028 kL = ______________L?
Answer: 815 L
Explanation:
0.028 kL=28L (times 1000)
843 L-0.0028 kL=843L-28L=815 L
Hope this helps!! :)
Please let me know if you have any question or need any further explanation
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
.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
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
somebody PLEASE help me on this DO NOT waste my answers PLEASE HELP ITS URGENT
This is integrated Physics and Chemistry
Answer:
#1: 8.92 x 10^6 = 8920000
#2: 3.05 x 10^-3 = 0.00305
Explanation:
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:
1150 g - 0.652 kg = ______________g?
Answer:
The required answer is 498 gram
2 decaliters + 800 deciliters = __________ liters?
Answer:
800 +2 is 802 is decilitre
o.802 is in l
6. I ran 12.2 km in 1.4 hours. Then I ran another 19.3 km uphill in 2.2 hours. What was my average speed?
Answer: 8.75 km/hr
Explanation:
Concept to know
Average speed: total distance/total time
-------------------------------------------------------
total distance/total time
=(12.2+19.3)/(1.4+2.2) ⇔ add the numbers of two time running together
=31.5/3.6 ⇔ simplify
=8.75 km/hr
Hope this helps!! :)
Please let me know if you have any question
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
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:
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.
If three forces are equal and thier resultant force is zero, then measure of its internal angle is _____
Answer:
45 degrees
Explanation:
how will the pandemic change our life?
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.
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
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]