Answer:
average speed = 0.5 m/s
Explanation:
average speed = (distance) / (elapsed time)
Given time elapsed = 30 seconds and distance = 15 meters
average speed = 15 meters / 30 seconds = 0.5 meters/second = 0.5 m/s
a cyclist accelerates from a initial speed of 0 m/s to a final speed of 8 m/s in 3 second what is his acceleration?
Answer:
3 m/s ^2 rounded to one signifiicant figure.
Explanation:
Hope this helped!
A complex arrangement of pulleys forms what is called the block in a block and tackle. The rope used to lift the pulleys and the load is the tackle. A block and tackle is used to lift a truck engine, which has a weight and output force of nearly 8000 N. The input force required to lift this weight using the block and tackle is 400N. What is the mechanical advantage of the block and tackle?
Answer:
Mechanical advantage = 20
Explanation:
Given:
Output force = 8,000 N
Input force = 400 N
Find:
Mechanical advantage
Computation:
Mechanical advantage = Output force / Input force
Mechanical advantage = 8,000 / 400
Mechanical advantage = 20
what are the Standard System of unit
Answer:
SI
Explanation:
When does an object reach its terminal velocity?
Answer: Terminal velocity is achieved, therefore, when the speed of a moving object is no longer increasing or decreasing; the object's acceleration (or deceleration) is zero.
Explanation:.
Answer: Terminal velocity is achieved, therefore, when the speed of a moving object is no longer increasing or decreasing; the object's acceleration (or deceleration) is zero.
As others have said, 8 seconds to get to 90% of terminal velocity. But if you're falling from outer space, you could reach speeds much higher than terminal velocity, and slow down when you reach the atmosphere. If coming in from a long distance, you'll burn up like a meteorite.
Explanation:
3. Label the parts of each wave.
Please help me!!!
Answer:
D is the wavelength
A is the crest
C is amplitude
B is trough
G is wavelength
H is compression
I is rarefaction
Find the acceleration of a car with the mass of 1,200 kg and a
force of 11 x 103 N.
The acceleration of the car with the mass of 1200kg and a force of 11 × 10³N is 9.17m/s²
HOW TO CALCULATE ACCELERATION:
The acceleration of a moving body can be calculated by dividing the force applied by the mass. That is;Acceleration (m/s²) = Force (N) ÷ mass (kg)According to this question, a car has a mass of 1,200 kg and a force of 11 x 10³ N. The acceleration can be calculated as follows:Acceleration = 11000N ÷ 1200kgAcceleration = 9.17m/s²Therefore, the acceleration of the car with the mass of 1200kg and a force of 11 × 10³N is 9.17m/s²Learn more at: https://brainly.com/question/17289046?referrer=searchResults
If the white car experiences a change in momentum equal to 105,000 kg*m/s and is in contact with the red car for 5 seconds before coming to rest, how much force, in Newtons, does the white car experience during the collision?
Answer:
21000 N
Explanation:
From the question given above, the following data were obtained:
Change in momentum = 105000 kg.m/s
Time = 5s
Force =?
Force is related to momentum and time according to the following formula:
Force = Change in momentum / time
With the above formula, we can calculate the force the white car experience during the collision. This can be obtained as illustrated below:
Change in momentum = 105000 kg.m/s
Time = 5s
Force =?
Force = Change in momentum / time
Force = 105000 / 5
Force = 21000 N
Thus, the white car experience a force of 21000 N during the collision.
A car traveling at 25 m/s speeds up to 30 m/s over a period of 5 seconds. The average acceleration of the car is?
Answer:
a= 1 m/s^2
Explanation:
Average acceleration can be found by dividing the change in velocity by the time.
a= ΔV/t
The change in velocity is the difference of the final velocity and initial velocity.
ΔV= final velocity - initial velocity
The final velocity is 30 m/s and the initial velocity is 25 m/s
ΔV= 30 m/s- 25 m/s
ΔV= 5 m/s
The time is 5 seconds.
Now we know the two values.
ΔV= 5 m/s
t= 5 s
Substitute the values into the formula.
a= 5 m/s / 5 s
Divide.
a= 1 m/s/s
a= 1 m/s^2
The average acceleration of the car is 1 meter per second squared.
What is the word for a connected web of brain cells whose bonds grow stronger the more you use them?
Answer:
This question appear incomplete
Explanation:
This question appear incomplete because of the lack of options. However, a connected web of cells is generally referred to as the tissue. These cells are joined together by cell-cell adhesion (a form of bond) to form the tissue. The type of tissue being referred to here is the nervous tissue as this is the type of tissue present in the nervous system (including the central nervous system of which the brain is a part of).
What do menarche and spermarche have to do with physical development?
12.
A Pole 4m Long is laid along the principal axis of a convex mirror of
focal length 1m the end of the pole nearer the mirror is 2m from it.
Find the length of the image of the pole.
Ans: 0.19m
Answer:
The length of the image of the pole is 4/3 m
Explanation:
The given parameters are;
The length of the Pole = 4 m
The type of mirror = Convex mirror
The distance of the pole from the mirror = 2 m
The mirror formula for convex mirrors is presented here as follows;
[tex]\dfrac{1}{U} - \dfrac{1}{V} = - \dfrac{1}{F}[/tex]
Where;
U = The object (pole) distance from the mirror = 2 m
V = The image of the objects (pole) distance from the mirror
The focal length of the mirror
Therefore, by substitution, we have;
[tex]\dfrac{1}{2} - \dfrac{1}{V} = - \dfrac{1}{1}[/tex]
[tex]\dfrac{1}{2} + 1 = \dfrac{1}{V}[/tex]
[tex]\dfrac{1}{V} = \dfrac{1}{2} + 1 = \dfrac{3}{2}[/tex]
[tex]V = \dfrac{2}{3}[/tex]
We have;
[tex]Magnification = \dfrac{Image \ height}{Object \ height } = \dfrac{Length \ of \ the \ Image \ of \ the \ Pole}{Length \ of \ the \ of \ the \ Pole } =\dfrac{-V}{U}[/tex]
Which by substitution gives;
[tex]Magnification = \dfrac{Length \ of \ the \ Image \ of \ the \ Pole}{4} =\dfrac{-\dfrac{2}{3} }{2} = \dfrac{2}{6}[/tex]
[tex]{Length \ of \ the \ Image \ of \ the \ Pole}{} = 4 \times \dfrac{2}{6} = \dfrac{4}{3}[/tex]
The length of the image of the pole = 4/3 m
Refinery EM can produce 22 gallons of gasoline or 18 gallons of flight fuel per barrel of crude oil. Refinery CG can produce 18 gallons of gasoline or 16 gallons of flight fuel per barrel of crude oil. Does OUTPUT vary or does INPUT vary in this problem?
Answer:
Output varies
Explanation:
Here the outputs of gallons of gasoline and flight fuel is mentioned of two refineries namely Refinery EM and Refinery CG. The output has been mentioned with respect to one barrel of crude oil. So, one barrel of crude is used by both the refineries.
So, here the output (gallons of gasoline and flight fuel) varies while the input (one barrel of crude oil) remains constant.
2. Two people, one on Earth and the other on the Moon, try and lift 200 kg blocks. Which person
will have to exert more force to lift their block or will they need to exert the same amount of
force? Explain your reasoning(4 pts)
Answer:
The person on Earth will have to exert more force to lift their block
Explanation:
The mass of the blocks to be lifted = 200 kg
The location of the first person = On Earth
The location of the second person = On the Moon
The force a person will have to exert to lift the block = The weight of the block = The gravitational force, F, on the block which is given as follows;
[tex]F = \dfrac{G \times M_1}{R^2} \times m_2[/tex]
Where;
[tex]\dfrac{G \times M_1}{R^2}[/tex]= The acceleration due to gravity on the Earth or the Moon, depending on the location of the block
m₂ = The mass of the block
Therefore, given that the acceleration due to gravity on the Earth is larger than the acceleration due to gravity on the Moon, the weight of the block on the Earth is larger than the weight of the block on the Moon, and the person on Earth have to exert more force to lift the heavier weight of the block on Earth than the person on the Moon will have to exert to lift the same block as the block has a lower weight on the Moon due to lower acceleration due to gravity on the Moon.
simple machines are widely used in our daily life. why?
Answer:
Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities. Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever.
Answer:
Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities. Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever.
Explanation:
funny answer cuz peeps be lazy
b) A shopkeeper sold a watch for Rs 810 at 10% loss. How much did he pay to
buy the watch?
indir
Answer:
rs 900
Explanation:
the process is given
How does increasing the amount of charge on an object affect the electric force it exerts on another charged object?
The electric force increases because the amount of charge has an indirect relationship to the force.
The electric force increases because the amount of charge has a direct relationship to the force.
The electric force decreases because the amount of charge has an indirect relationship to the force.
The electric force decreases because the amount of charge has a direct relationship to the force.
Answer:
a
Explanation:
Answer:
A
Explanation:
A crossbow is fired horizontally off a cliff with an initial velocity of 15 m/s. If the arrow takes 4s to hit the ground, what is the range of the projectile?
Answer:
The range of the projectile is 60 meters
Explanation:
To determine the range/distance of the projectile, the formula for velocity is used;
velocity = distance/time
where velocity is 15 m/s
time is 4 seconds
distance is unknown
From the formula above, distance is made the subject and thus
distance = velocity × time
distance = 15 × 4
distance = 60 m
The range of the projectile is 60 meters
What is the astronomical unit used to measure distances in the solar system?
Answer:
Astronomical unit
Explanation:
Short Answer: It's (au)
Long Answer:
The astronomical unit (au or AU) is defined as exactly 149,597,870,700 meters (about 93 million mi), which is roughly equal to the average distance between the Sun and Earth.
A child throws a baseball straight up into the air and it takes 4.5 seconds to reach maximum height. What is the total time of flight for the baseball after being thrown and the baseball player catching it? What are the known and unknown variables? And what equation must be used?
Answer:
9 s.
Explanation:
The following data were obtained from the question:
Time (t) taken to reach the maximum height = 4.5 s
Time of flight (T) =?
The time of flight (T) is simply defined as the total time spent by the ball in the air. Mathematically, it defined as twice the time taken (t) to reach the maximum height i.e
T = 2t
With the above formula, we can obtain the time of flight as follow:
Time (t) taken to reach the maximum height = 4.5 s
Time of flight (T) =?
T = 2t
T = 2 × 4.5
T = 9 s
Thus, the time of flight of the ball is 9 s.
Milgram's experiment was trying to find out why people:
Answer: obey authority figures
Explanation:
Answer: Obey authority figures
Explanation:
What is light?
1. Only a particle
2. Neither a particle nor a wave.
3. Only a wave.
4. Scientists continue to debate this.
Answer:
3
Explanation:
I took an Educated guess because i really dont know tbh
Answer:
Neither.
Explanation:
A giraffe is . . .a giraffe.
In a similar manner, light is not a wave, but behaves like a wave. In this section, you will find that light also behaves like a particle.
In a way, light is...
also:
Isaac Newton tried to prove that light is a particle; Christiaan Huygens demonstrated that light is a wave. These men were both right and wrong.
Light is neither wave nor particle, (LOOK HERE)
but it does exhibit properties associated with waves and properties associated with particles.
light ;D i Hope Im right plz mark brainliest
Have a great day
5. Electromagnetic waves consist of two forces
and
Answer:
Electromagnetic waves consist of both electric and magnetic field waves. These waves oscillate in perpendicular planes with respect to each other, and are in phase. The creation of all electromagnetic waves begins with an oscillating charged particle, which creates oscillating electric and magnetic fields.
Explanation:
I need help plz
Help meh
Answer:
6. False
7. a
8.kinetic
9. ek/n
10.True
Explanation:
Answer:
1. kinetic
2. d
3. b
4. true?
5. true
6. True
7. a
8. kinetic
9. Thermal
10. true
1. Discuss how we use trial and error, algorithms, heuristics, and insight to solve problems. For each concept, define the term and then describe an incident (either from your own experience or that of a friend) in which the concept was used to determine a solution to a specific problem. You must use specific details of the incident and terms from our module to show me you understand the concept. (Total 64 points)
2., How can confirmation bias and fixation can interfere with effective problem solving. In this portion of your response, for each concept, define the term and then describe an incident (either from your own experience or that of a friend) in which the concept interfered with an appropriate solution being determined. You must use specific details of the incident and terms from our module to show me you understand the concept. (Total 32 pts).
Answer: used concepts to simplify and order the world around us, categories: objects, events, ideas, or people
hierarchies: subdivide categories into smaller more detailed units, prototypes: best example
algorithm: time-consuming but thorough set of rules or procedures
heuristics: simpler way of thinking, solve problems but maybe incorrect solutions
insight: flash of inspiration that solves problem
representativeness heuristic: judge likelihood of things in terms of how they represent our prototype
availability heuristic: judge likelihood of things based on how vivid they are or how readily they come to mind.
Explanation: i hope that helped!
Which illustration represents low accuracy but high precision?
Answer:
D i think
Explanation:
Lindsay is planning a flight from St. Catharines to Hamilton, which lies due west of St. Catharines. Her aircraft flies at a speed of 200 km/h in still air.A wind of 50.0 km/h is blowing from [W 608 N]. In what direction must sheaim the airplane to fly directly to Hamilton?
Answer:
Lindsay is planning a flight from St. Catherines to Hamilton, which lies due west of St. Catharines. Her aircraft flies at a speed of 200 km/h in still air. A wind of 50.0 km/h is blowing from [W 60.0� N]. In what direction must she aim the airplane to fly directly to Hamilton?
------------
It's a triangle problem.
The long side is the 200 km/hr, at an angle to be determined.
-----
1 side is 50 km/hr at an angle of -60 degs or 300 degs.
The 3rd side's length is not known, but it's at an angle of 180 degs (along the x-axis).
Lindsay has to fly this plane towards this direction [W 12.5° S] to get to Hamilton.
From this question, the plane is still up in the air.
We have wind blowing in [W 60° N ]
To solve the problem we have to make use of the sine rule
[tex]\frac{SinA}{a}=\frac{SinB}{b} =\frac{SinC}{c}[/tex]
We put the values in the equation, we have:
50/Sinθ = 200/sin60°
The next step is to cross multiply
50 x sin60° = 200Sinθ
50 x 0.8660 = 200sinθ
We make Sin θ the subject
Sine θ = 43.30/200
sine θ = 0.2165
we find the value of θ
θ = sine⁻¹(0.2165)
θ = 12.50
So Lindsay has to fly this plane towards this direction
[W 12.5° S]
Here is a similar question https://brainly.com/question/13338067?referrer=searchResults
An experimental device imparts a force of magnitude f = 37 lb to the front edge of the rim at a to simulate the effect of a slam dunk. compute the moment of the force f about point o and about point
b. the moments are positive if counterclockwise, negative if clockwise. finally, locate a point c from the base at o to the location on the ground where the force imparts zero moment. the distance d from point o to point c is positive if c is to the right of o, and negative if to the left.
Answer:
a) τ = -518 lb-inch , b) d = 0 inch
Explanation:
a) The moment of a force is given by
τ = F x r
The bold letters indicate vectors, we can solve the magnitude of this expression with
τ = F r sin θ
and the angle by the right hand rule.
In general, the applied force is perpendicular to the rubber and in such a direction that the moment is opposite to the movement, therefore the angle is 270 = -90º and the sin 270 = -1
τ = -F r
To perform a complete calculation, the radius of the rubber is needed, for example for a small car the radius is about 14 inch = 1,167 feet
τ = -37 14
τ = -518 lb-inch
The point o is assumed to be the center of the wheel, the negative sign indicates that the moment is clockwise
b) As the rubber is a circle and the force is perpendicular, the vector product gives an emoticon perpendicular to the rubber, so that this value decreases to zero we must reduce the application point (distance), that is, the distance must be zero.
d = 0 inch
5. Which is the best example of Newton's Second Law of Motion? (2 points)
Answer: Riding a bike to the park
Explanation:
Find the horizontal and vertical components of 75.0 N at 65 degrees
Horizontal component = 75 · cosine(65°) = 31.7 N
Vertical component = 75 · sine(65°) = 68.0 N
A student wants to test if a bean plant will grow taller under green light than under sunlight. Select from the drop-down menu the correct step of the scientific method that each statement describes.
Two identical bean plants are grown next to each other. They receive the same amount of water and sunlight. One plant is covered with a green, light-filtering plastic cover, and the other with a clear plastic cover. Measurements of the bean plants’ heights are recorded every day for two weeks.
Answer:
Experiment
Record Results
Predict
Hypothesis
Analyze and Conclude
Observation and Questioning
Note: The question is incomplete. The complete question is given below:
A student wants to test if a bean plant will grow taller under green light than under sunlight. Select from the drop-down menu the correct step of the scientific method that each statement describes. Two identical bean plants are grown next to each other. They receive the same amount of water and sunlight. One plant is covered with a green, light-filtering plastic cover, and the other with a clear plastic cover. Measurements of the bean plants’ heights are recorded every day for two weeks. The student writes a lab report detailing the experimental procedure and results. The bean plant grown under the green filter will grow taller than the bean plant grown under unfiltered sunlight. Green light makes plants grow taller. The measurements show that the plant grown in natural sunlight grew taller than the green-filtered plant. So green light does not make plants grow taller. Plants are colored green, so maybe they grow more in green light.
Explanation:
1. An experiment is a procedure carried to test a hypothesis in order to support, reject or confirm the hypothesis. The steps below are for an experiment to whether bean plants grow taller under green light or sunlight.
Two identical bean plants are grown next to each other. They receive the same amount of water and sunlight. One plant is covered with a green, light-filtering plastic cover, and the other with a clear plastic cover. Measurements of the bean plants’ heights are recorded every day for two weeks.
2. Results of the experiment are recorded. The statement below indicates that results were recorded.
The student writes a lab report detailing the experimental procedure and results.
3. Predictions are expected results based on an initial hypothesis. The statement below is a prediction.
The bean plant grown under the green filter will grow taller than the bean plant grown under unfiltered sunlight.
4. A hypothesis is a statement that seeks to explain an observed phenomena. The statement below is a hypothesis:
Green light makes plants grow taller.
5. Analysis and conclusion: the results of the experiment are analysed and conclusions are then drawn. The statement below shows analysis and conclusion based on results of the experiment:
The measurements show that the plant grown in natural sunlight grew taller than the green-filtered plant. So green light does not make plants grow taller.
6. Observations and Questions are necessary parts of the scientific method. Observing phenomena around and asking questions about our observations helps in the process of making a hypothesis. The statement below is illustrates observation and questioning:
Plants are colored green, so maybe they grow more in green light.
Answer: D,F,C,B,E,A
Explanation:
i took the test