Answer:
Vf = 98 m/s
Explanation:
The dime is in a free fall motion under the influence of gravity. For the final velocity of the dime, we use 1st equation of motion here:
Vf = Vi + gt
where,
Vf = Final Velocity = ?
Vi = Initial Velocity = 0 m/s (Since, the initially the dime was at rest)
g = acceleration due to gravity = 9.8 m/s²
t = time taken = 10 s
Therefore, using these values, we get:
Vf = 0 m/s + (9.8 m/s²)(10 s)
Vf = 98 m/s
A hill that has a 31.7% grade is one that rises 31.7 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal
The grade is also the tangent of the angle above horizontal.
The angle whose tangent is 0.317 is called the "arctangent" of 0.317
It's 17.6 degrees.
When evaluating data, why is it better to make a graph instead of just looking at the raw data in the table?(8th grade Science since there is no regular science option i'm just gonna put physics)
Answer:All professors planned and thought about data before graph construction. When reflecting on their graphs, professors and graduate students focused on the ... feel more inclusive in the learning process and gain better science process skills, ... We organized data in a table instead of a paragraph with numbers
Explanation:
hope that helps
An airplane flying due north at 90 km/h is being blown due west. The planes total velocity is 103 km/ hr north west. What is velocity of the wind?
Answer:
50.09 km/h
Explanation:
Given that an airplane flying due north at 90 km/h is being blown due west. The planes total velocity is 103 km/ hr north west.
What is velocity of the wind ?
The wind velocity can be calculated by using pythagorean theorem.
From the question,
Resultant Velocity R = 103 km/h
Plane velocity P = 90 km/h
Wind velocity W = ?
W^2 = R^2 - P^2
Substitutes all the parameters into the formula
W^2 = 103^2 - 90^2
W^2 = 10609 - 8100
W^2 = 2509
W = sqrt ( 2509 )
W = 50.09 km/h
Therefore, the velocity of the wind is 50.09 km/h
How much force does a soccer goalie
experience when stopping a ball with the
mass of 0.2 kg that accelerates at the rate
of 10 meters per second^2?
Answer:
2 N
Explanation:
From the question, it's given that
Mass m = 0.2 kg
Acceleration a = 10 m/s^2
The force a soccer goalie experience when stopping a ball will be equal to the force at which the ball is being kicked. This is
F = ma
Substitute all the parameters into the formula
F = 0.2 × 10
F = 2 Newton.
can anyone tell me the ans of this question also please
Answer:
Hey there!
Stopwatch X recorded 40 seconds, and stopwatch Y recorded 50 seconds.
Stopwatch Y recorded 10 seconds longer than stopwatch X.
Hope this helps :)
Answer:
Explanation:
Stopwatch X recorded 40 seconds, and stopwatch Y recorded 50 seconds.
Stopwatch Y recorded 10 seconds longer than stopwatch X.
an armadillo rolls in a straight line in the desert. the horizontal position of the armadillo in meters over time is shown.
what is the displacement of the armadillo between 0s and 24s ?
what is the distance traveled by the armadillo between 0s and 24s
Answer:
Displacement = -6m
Distance = 24m
Explanation:
From the position time graph given above, the displacement of the armadillos will base on the distance covered with direction in consideration.
Displacement = (15 - 6) - 15
Displacement = 9 - 15
Displacement = - 6m
While distance will be:
Distance = (15 - 6) + 15
Distance = 9 + 15
Distance = 24 m
Answer:
See attached (No Decimals Needed)
Explanation:
What will be the fundamental frequency and first three overtones for a 26cm long organ at 20°C if it is open ( at 20°C, the speed of sound in air is 343m/s)
Explanation:
The frequency of an organ pipe if it is open is given by :
[tex]f=\dfrac{nv}{2l}[/tex]
v is speed of sound in air is 343 m/s at 20°C
For fundamental frequency, n = 1
[tex]f=\dfrac{1\times 343}{2\times 0.26}\\\\f=659.61\ Hz[/tex]
First overtone frequency,
[tex]f_1=2f\\\\f_1=2\times 659.61\\\\f_1=1319.22\ Hz[/tex]
Second overtone frequency,
[tex]f_2=3f\\\\f_2=3\times 659.61\\\\f_2=1978.83\ Hz[/tex]
Third overtone frequency
[tex]f_3=4f\\\\f_3=4\times 659.61\\\\f_3=2638.44\ Hz[/tex]
Hence, this is the required solution.
what is classic physics
Answer:
Classical physics refers to theories of physics that predate modern, more complete, or more widely applicable theories. If a currently accepted theory is considered to be modern, and its introduction represented a major paradigm shift, then the previous theories, or new theories based on the older paradigm, will often be referred to as belonging to the realm of "classical physics".
As such, the definition of a classical theory depends on context. Classical physical concepts are often used when modern theories are unnecessarily complex for a particular situation. Most usually classical physics refers to pre-1900 physics, while modern physics refers to post-1900 physics which incorporates elements of quantum mechanics and relativity.
name the regions in which parenchyma tissue is present
The parenchyma is widely distributed in plant body such as stem , roots, leaves, flowers and fruits. The parenchyma tissue is found in the soft parts of the plants such as cortex of roots, ground tissue in stems & mesophyll of leaves. It is also distributed in pith , medullary rays & packing tissue in xylem and phloem. They forms the bulk of the plant body they are living and possesses the power of their division. Parenchyma cells have living Protoplasm.
The main function of parenchyma is to store an assimilate food. Parenchyma serves as food storage tissue.
QUESTION 1
67.2 kilometers = how many decameters
Answer: the answer should be 6,720 decameters.
Answer:
67.2 kilometers =6720 decamaters
WHAT ARE 5 EXAMPLES of REAL science
Answer:
physics
kinematics
dynamics
fluid mechanisms
earth sciences
A ball is thrown upward from a cliff. The ball rises to its maximum height and then falls into the valley below. Suppose the ball is thrown upward at 30m/s and lands 9s after it is thrown. What is the height of the cliff?
Answer:
The height of the cliff is approximately 127.31 meters
Explanation:
The given parameters are;
The upward speed of the ball = 30 m/s
The time after the ball is thrown before it lands = 9 s
We have;
The time to maximum height;
v = u - g·t
Where;
v = The velocity at maximum height = 0 m/s
u = Initial velocity = 30 m/s
g = The acceleration due to gravity = 9.81 m/s²
∴ 0 = 30 - 9.81 × t
t = 30/9.81 = 3.06 s
The maximum height can be obtained from;
v² = u² - 2·g·s
v = 0 m/s
u² = 2·g·s
30² = 2 × 9.81 × s
s = 30²/(2×9.81) = 45.87 m
The time from maximum height to landing = 9 - 3.06 = 5.942 s
The height to landing
s = u·t + 1/2·g·t².
Here, u = 0 m/s
s = 0×5.942 + 1/2×9.81×5.942² = 173.1766 m
s = 173.1766 m.
The height of the cliff = 173.1766 m. - 45.87 m. ≈ 127.31 m.
What is the vertical acceleration of a paper airplane that is launched horizontally with an initial velocity of 2.3 m/s?
Answer:
The vertical acceleration is -9.81 m/s^2
Explanation:
When a body is projected, the body experiences an acceleration in the vertical axis that is proportional to the acceleration due to gravity of the earth, which is equal to 9.81 m/s^2. In this case, the acceleration acts to stop the vertical motion of the paper plane, and hence is a deceleration, which explains the negative vertical acceleration.
Answer:
A
Explanation:
What problem do you think you can solve around your home using the engineering process?
Answer: Look for something that is not working as well as it should, or is inconvenient.
Explanation: Ask youself (or other s) how it could be improved. Imagine a way to make it better. Draw a design, or make a model or experiment to see if the change you propose will work. You could do research for examples of similar situations to see what others have tried.
You could invent an entirely new solution!
a car travels 480 km in 12 hr. what is its velocity
Answer:
Explanation:
velocity=s/t
given distance is 480 km we have to convert it into meter because the unit of distance is meter
1 km=1000 m
480 km=480000 m =4.8*10^5
1 hour= 3600 s
12 hour =43200 s
now velocity=s/t
v=4.8*10^5/43200
v=11.11 m/s
Answer:
The correct answer is 40
Explanation:
Divide 480 and 12 that = 40v
Hoped I helped
What represents an Exothermic Reaction?
Answer: An exothermic reaction is a chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products. During an exothermic reaction, energy is constantly given off, often in the form of heat.
Explanation: An exothermic reaction is a chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products. During an exothermic reaction, energy is constantly given off, often in the form of heat.
Hope this helps^^
How did scientists determine the age of our universe?
Answer:
Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang; just as crime detectives can trace the origin of a bullet from the holes in a wall.
Explanation:
Is velocity more like distance or displacement? Why?
Answer:
Displacement
Explanation:
Velocity is more like displacement because
Both are vector quantities. Which means Magnitude+direction.Both have an arrow above their signs which indicates they are vectors.
Hope this helps ;) ❤❤❤
Calculate the force needed to move a 2kg mass with an acceleration of 5ms-2
Answer:
[tex]\Huge \boxed{\mathrm{10 \ N}}[/tex]
Explanation:
[tex]\sf Force \ (N)=mass \ (kg) \cdot acceleration \ (ms^{-2})[/tex]
[tex]F=ma[/tex]
The mass is 2 kg.
The acceleration is 5 ms⁻².
[tex]F = 2 \cdot 5[/tex]
[tex]F=10[/tex]
The force is 10 N.
The Big Bang is considered a scientific theory. Why is this true?
A It explains natural phenomena and is based on scientific evidence.
B The scientist Edwin Hubble thought of it.
C It explain the origins of the universe.
D It cannot be disproven.
Answer:
Explanation:In the natural sciences we make observations and construct models.
If those models are consistent with our observations then we can make predictions from those models and test them against more observations.
If some observations contradict our models, then we can tell that our models are wrong or in need of modification.
For example, Newton's laws of physics provide pretty good models sufficient in accuracy to allow us to calculate how to land a man on the moon. Are they therefore true? Not exactly. Newton's laws fail to work well at velocities approaching the speed of light. So we can tell that they need some adjustment.
Einstein's special and general theory of relativity provide more accurate models. So are they true? They predict all sorts of strange behaviour which we have actually observed. They seem to provide useful models, but they do not explain everything. For example, the extreme conditions in a black hole or those we think existed at the start of the universe provide some challenges to General Relativity.
From a practical perspective it is useful to operate within theoretical frameworks that we treat as facts. We need to make assumptions in order to reach substantial conclusions. So we often act as if something like Big Bang theory is a fact, but we cannot know it to be so.
Essentially in any natural science we cannot prove anything to be true. We can demonstrate that theories are false. This is the honesty of science.
Consider an alternative theory: The universe and everything you "know" actually started
10
minutes ago.
You may protest that you remember what you did yesterday. In my theory I can explain that these are simply implanted memories, not real. What about radiometric dating? What about the Andromedra galaxy being
2.5
million light years away, so the light we see from it started travelling in our direction
2.5
million years ago? In my theory I can claim that these are all an elaborate implanted fiction.
There is no way to prove that this theory is true and probably no way to prove that it is false.
Talia is in a road trip with some friends. I. The frist 2 hours they travel 100 miles then they hit traffic and go only 30 miles in the next hour the last out of the round trip they drive 75 miles calculate the evergreen speed of the car
Correct question is;
Talia is on a road trip with some friends. in the first 2 hours, they travel 100 miles. then they hit traffic and go only 30 miles in the next hour. the last hour of their trip, they drive 75 miles. calculate the average speed of talia’s car during the trip. give your answer to the nearest whole number.
Answer:
Average speed ≈ 51 mi/hr
Explanation:
Total distance travelled by Talia = 100 + 30 + 75 = 205 miles
Total time taken by Talia = 2 + 1 + 1 = 4 hours.
Now, formula for average speed is;
Average speed = Total distance/total time
Thus;
Average speed of talia = 205/4
Average speed of talia ≈ 51 mi/hr
In 1935, a French destroyer, La Terrible, attained one of the fastest speeds for any standard warship. Suppose it took 3.0 min at a constant acceleration of 0.50 m/s2 for the ship to reach its top speed after starting from rest. Calculate the ship's final speed.
Answer:
Explanation:
From newton's equation of motion of uniform acceleration
v = u + at
where v is final velocity , u is initial velocity , a is acceleration and time is t .
putting the values
v = 0 + .5 x 3 x 60 ( time in second = 3 x 60 s )
= 90 m /s
So , final velocity is 90 m /s .
In system A, momentum changes at twice the rate of the momentum system B. Which statement is correct about systems A and B?(1 point)
The impulse of the collision in system A is half the impulse of the collision in system B.
The force of the collision in system A is twice the force of the collision in system B.
The force of the collision in system A is half the force of the collision in system B.
The impulse of the collision in system A is twice the impulse of the collision in system B.
Answer:
The impulse of the collision in system A is twice the impulse of the collision in system B. (Last choice)
Explanation:
I just took the quick check and got it wrong for putting what the other person put, which I should've gone with my first choice. The answer above is correct. I really hope this helps!
The correct statement about systems A and B is ; ( D ) The impulse of the collision in system A is twice the impulse of the collision in system B
Momentum is a product of the mass and velocity of particles in motion while impulse is the rate of change of the momentum of particles/objects when a force acts on the object.
The momentum of a particle is proportional to its impulse therefore as momentum in system A changes at twice the rate of change of the momentum in system B the impulse of the collision in system A is also twice the impulse of the collision in system B
Hence we can conclude that The correct statement about systems A and B is The impulse of the collision in system A is twice the impulse of the collision in system B
Learn more : https://brainly.com/question/20182620
If there are 7 positive charges, then how many negative charges would be needed to reach a neutral charge?
A beaker contains 0.42 L of water. The beaker's volume is ___ milliliters.
Answer:
ans is 420ml
Explanation:
0.42L×1000ml
420ml
An object wants to maintain its state of motion because it has mass. True or false
Answer:
True
Explanation:
When no net force is applied to a moving object, it still comes to rest because of its inertia.
It is a true statement that an object wants to maintain its state of motion because it has mass, as per the first law of the motion due to the effect of inertia an object tries to maintain its state of motion whether it would be a state of motion or the state of the rest.
What is Newton's first law?According to Newton's first law, until pushed to alter its condition by the intervention of an external force.
Every object will continue to be at rest or in uniform motion along a single direction.
It is true that an item wants to keep moving because it has mass. According to the first law of motion, this is because of the influence of inertia, which causes an entity to try to keep moving whether it is in movement or at standstill.
Learn more about Newton's first law from here,
brainly.com/question/1222214
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Whenever you push an object across a frictional surface, it starts out taking a lot of force to push to get the object moving. However, once the object starts moving, it is much easier to keep it moving. What does this tell you about one of the main differences between static and kinetic friction?
A) Static friction only depends on the surface material, while kinetic friction only depends on the motion
B) Kinetic and Static friction are the exact same thing
C) Static friction and kinetic friction are combined in one at all times, but static friction is just not seen during the motion
D) Static Friction is much stronger than kinetic friction, so it takes more force to get an object moving than it does to keep it moving
Answer:
The correct answer is D. Static friction is much stronger than kinetic friction, so it takes more force to get an object moving than it does to keep it moving.
Explanation:
We can eliminate choice A if we know that both static friction and kinetic friction depend on what are called the coefficients of static friction and kinetic friction, respectively. These coefficients are a reflection of the nature of the surface. In other words, both static friction and kinetic friction depend on the surface material (choice A is incorrect).
Choice B is incorrect because static friction applies to still (static) object whereas kinetic friction applies to moving objects (that have kinetic energy).
Choice C is also incorrect.
Choice D is correct as described in the given information. It takes much more force to start an object from rest than to keep it moving. Think about things in your everyday life - it takes a push to get a toy car moving along the ground, but you do not need to consistently push the car with the same force to keep it moving. This reflects that static friction is much stronger than kinetic friction, which is also described by the relationship between their coefficients (the coefficient of static friction is generally greater than that of kinetic friction).
Hope this helps!
Which of the following is the largest mass? A 5 kilograms b 1 000 milligrams C 800 centigrams D 100 grams
Answer:
A) 5 kilograms is the largest and the heaviest out of all.
A spy is running across the bridge of an aircraft carrier. The spy is moving with a velocity of - 4 m/s relative to the carrier. However, the aircraft carrier is moving with a velocity of 12 m/s. There is a person standing stationary on a beach watching the event. What will be the velocity of the spy according to the person on the beach? 8 m/s 6 m/s -4 m/s -7 m/s
Answer:
The correct option is A
Explanation:
From the question we are told that
The velocity of the spy relative to the carrier is [tex]v_s = -4 \ m/s[/tex]
The velocity of the aircraft carrier is [tex]v_a = 12 \ m/s[/tex]
Generally the velocity of the spy according to the person standing stationary on the beach is mathematically represented as
[tex]v = v_s + v_a[/tex]
[tex]v = -4 + 12[/tex]
[tex]v = 8 \ m/s[/tex]
Claire lost weight thanks to the support and encouragement of her friends. They helped her stick to a healthy diet and pushed her to engage in physical exercise every day. Identify the FaceTime that helped her lose weight
Answer:
hello the options to your question is missing below are the options
culture
heredity
physical environment
social environment
answer : social environment
Explanation:
Claire ability to lose weight due to the encouragement and support of her friends shows that she was ability to achieve her goal due to her social circle ( friends ). therefore the face time that helped her lose weight is her social environment and not culture nor any other option as mentioned above.
social environments help/play a vital role in individual's life a lot as long as every human being is a social being