Answer:
130kg/ms
Explanation:
given data mass,52kgvelocity,2.5m/smomentum?from momentumM=mvMass=52kg
Velocity=2.5m/s
Momentum=?
We know that,
Momentum=Mass × velocity
Or,momentum=52kg× 2.5m/s
Or,momentum=130 kgm/s
So,the momentum is 130 kgm/s.
Which statement best describes a primary source?
A. The source is written by the person who conducted the
experiment.
B. The source is written by an expert in the field.
C. The source is compiled from other sources.
D. The source is filled with mathematical equations.
Answer:A. The source is written by the person who conducted the experience
Explanation:
Primary source is the source that is written by the person who conducted the experiment. The correct option is A.
The easiest way to describe a primary source is that it was created by someone who actually participated in the experiment or event being researched.
A primary source offers information that has been obtained directly from the person who conducted the research or investigation.
It provides a clear viewpoint and insights into the topic, making it a useful and reliable source for research and analysis.
Research papers, diaries, interviews, original documents, experimental results, and eyewitness stories are a few examples of primary sources.
Thus, the correct option is A.
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4. A Ferrari travels 350km in 2 hours. What was it's
s speed?
examples of uniform motion
Answer:
An airplane cruising at a level height and a steady speed.
A car going along a straight level road at steady speed.
A vibrating spring in a sewing machine.
A ship steaming on a straight course at steady speed.
A train going along the tracks at steady speed.
Explanation:
Hope this helps :)
Answer:
Examples of Uniform Motions.
The hr. ...
An airplane cruising at a level height and a steady speed.
A car going along a straight level road at steady speed.
A vibrating spring in a sewing machine.
A ship steaming on a straight course at steady speed.
A train going along the tracks at steady speed
A 1 kg puck sliding on a horizontal shuffleboard court is slowed to rest by 1 point
a frictional force of 3 N. What is the coefficient of kinetic friction between
the puck and the surface of the shuffleboard court? *
O A. 0.25
O B.0.5
O c.0.15
D. .31
Answer:
miu = 0.31
Explanation:
The friction force is defined as the product of the normal force by the coefficient of friction.
[tex]f=miu*N[/tex]
where:
f = friction force = 3 [N]
miu = friction coefficient
N = normal force [N]
The normal force on a horizontal surface can be calculated by means of the product of mass by gravity.
where:
m = mass = 1 [kg]
g = gravity acceleration = 9.81 [m/s²]
[tex]N=m*g\\N=1*9.81[/tex]
[tex]N= 9,81 [N][/tex]
Now replacing in the equation above, we can find the friction coefficient.
[tex]miu=3/9.81\\miu = 0.31[/tex]
A marble is given potential energy by being placed by a location w. When the marble is released it rolls down the track at which location dose the marble have maximum kinetic energy w x or y or z
Answer:
The answer is "Location Y"
Explanation:
Please find the complete question in the attachment.
As we show in the graph when the marble rolling with the full force it will stop on the y location because it is curved, and the marble can't move to another location, that's why the maximum kinetic energy of the marble is at the y location.
2. (1) A piece of rubber is 50 cm long when a weight of
35 N hangs from it and is 85 cm long when a weight
of 70 N hangs from it. What is the spring constant
of this piece of rubber?
Answer
By F = -kx {-ve just indicating the sign of the force}
=>35 = k x (85-50) x 10^-2
=>k = 100 N/m
Again by F = -kx
Which stable element is used to determine the age of volcanic rock?
argon
carbon-14
potassium
carbon-12
Answer:
The answer is A
Explanation:
Argon is the stable element that is used to determine the age of volcanic rock as it is found inside of it.
I dont know if the top is correct but the answer is because i just took the test.
The age of volcanic rock is determined by argon-40 by radiometric dating. Hence option A is correct.
What is radiometric dating?Using radioactive isotopes found within an object, radiometric dating may determine how ancient something is, such as a fossil, rock, or piece of wood. By analyzing the ratio of radioactive argon to radioactive potassium within a rock, we can use the potassium-argon dating technique to determine the age of the rock or when it was formed.
The fundamental idea behind radiometric dating is that by comparing an isotope's presence in a sample to its abundance on Earth and its known half-life (rate of decay), you may determine the sample's age. Because many radioactive materials degrade more slowly than others, radiometric dating is useful for determining the age of ancient objects.
Argon-40 is used to determine the age of volcanic rock. Therefore, option A is correct.
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PLEASE HELP ME IM TIMED
Can someone help me in this please any one good in science.
Let's calculate the equivalent resistances on both circuits.
On Diagram A we have a series connection of the resistors. The equivalent resistance will be the sum of all resistances:
[tex]R_{eq}=1+1+1\\\\\boxed{R_{eq}=3\Omega}[/tex]
On diagram B we have a parallel connection of the resistors. The reciprocal of the equivalent resistance will be the sum of the reciprocals of all the resistances:
[tex]\frac{1}{R_{eq}} = \frac{1}{1} +\frac{1}{1} +\frac{1}{1} \\\frac{1}{R_{eq}}=3\\\\\boxed{R_{eq}=\frac{1}{3}}[/tex]
Therefore, the larger resistance occurs on diagram A.
For the current, recall
[tex]V=IR[/tex]
Where [tex]I[/tex] stands for current [tex]R[/tex] is the resistance and [tex]V[/tex] is the voltage. Rearranging the equation we have
[tex]I = \frac{V}{R}[/tex]
We can see that the larger the resistance, the smaller the current gets. So the larger current must happen in the diagram with smaller resistance. Therefore, the larger current occurs on diagram B.
Glad to help, wish you great studies ;)
Mark brainliest if you deem the answer worthy
I’ll give u BRAINLIEST PLEASE!! HURRY
Answer:
C
Explanation:
If you were to mix 7 grams of sugar into 100 grams of water, how much should the total mass of the solution be?
95 grams
100 grams
93 grams
107 grams
Answer:
The total mass of the solution should be 107 grams
Explanation:
Solutions
A solution is a homogeneous mixture consisting of a solute dissolved into a solvent. The solute is the substance that is being dissolved, while the solvent is the dissolving medium.
The relationship between the masses is:
[tex]m_s=m_o+m_v[/tex]
Where:
ms = mass of the solution
mo = mass of the solute
mv = mass of the solvent
If you were to mix mo=7 gr of sugar into mv=100 gr of water, then the total mass of the solution should be:
[tex]m_s=7~gr+100~gr[/tex]
[tex]m_s=107~gr[/tex]
The total mass of the solution should be 107 grams
The voltage between two points in a circuit is 4.2 V. If the resistance between
the points is 72, what is the current, according to Ohm's law?
A. 0.058 A
B. 76.2 A
O C. 17.1 A
O D. 302 A
Answer:
I = 0.058 [A]
Explanation:
Ohm's law is defined as voltage equal to the product of current by resistance.
[tex]V =I*R[/tex]
where:
V = voltage = 4.2 [V]
I = current [amp]
R = resistivity = 72 [ohm]
Now clearing I, we have:
[tex]I = V/R\\I = 4.2/72\\I = 0.058 [A][/tex]
Answer:
A. 0.058 A
Explanation:
please help !!!!! I’ll give brainliest !
I think A but I dont really know
A rock is at the top of a 30 meter tall hill. The rock has a mass of 15kg. How much potential energy does it have?
The potential energy of the rock at the top of a 30 meter tall hill is 4414.5 J.
How to calculate potential energy?Potential energy is the energy possessed by an object because of its position (in a gravitational or electric field), or its condition (as a stretched or compressed spring, as a chemical reactant, or by having rest mass).
The formula for potential energy depends on the force acting on the two objects. For the gravitational force, the formula is:
P.E = m × g × h
Where;
m = mass (kg)g = acceleration due to gravityh = heightAccording to this question, a rock is at the top of a 30 meter tall hill. If the rock has a mass of 15kg, the potential energy can be calculated thus;
P.E = 15kg × 9.81m/s² × 30m
P.E = 4,414.5J
Therefore, 4,414.5Joules is the potential energy of the rock.
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What year was the RoboSapien toy robot released?
a) 2007
b) 2004
c) 2020
d) dunno
option b )2004........
Which TWO of the following examples are a chemical reaction?
A melting ice
B breaking glass
C crumpling paper
D rusting iron
E burning wood
Answer:
D and E
Explanation:
They both produce a new object or substance afterwards.
Answer:
D. and E.
Explanation:
Hope this helps and I hope u have an Amazing day!!
HELP ASAP FAST PLEASE I NEED HELP
Mechanical energy is defined as
Question 1 options:
the energy of motion and position, which is represented by the formula KE + PE = ME
potential energy
Energy of motion
Energy of machines and tools
Answer:
energy of motion is represented by formula KE+PE=ME
Answer:
formula:
KE+PE=ME
Explanation:
HOPE IT HELPS!
thank me later
If an airplane with a mass of 4,536 kg has gravitational potential energy of 1000 kilojoules, what is its height?
Answer:
The height is 22,472.84 m
Explanation:
Gravitational potential energy is the type of energy that is stored in the gravitational field. In other words, the gravitational potential energy as the energy that a body possesses due to the fact of being under the action of gravity, that is, the energy associated with an object subjected to force, weight, and weight is called gravitational potential energy. that is at a certain height with respect to a reference level.
The greater the weight of a body, the greater the gravitational potential energy and, considering the effect of this variable together with that of the height h at which the object is, the gravitational potential energy is:
Ep = m*g*h
In this case:
Ep= 1,000 kJ= 1,000,000 J (being 1 kJ=1,000 J)m=4.536 kgg= 9.81 [tex]\frac{m}{s^{2} }[/tex]h=?Replacing:
1,000,000 J=4.536 kg* 9.81 [tex]\frac{m}{s^{2} }[/tex] *h
Solving:
[tex]h=\frac{1,000,000 J}{4.536 kg*9.81\frac{m}{s^{2} } }[/tex]
h= 22,472.84 m
The height is 22,472.84 m
Leo places a plant in front of the center of curvature of a concave mirror. Which characteristics will the image of the plant have? Check all that apply.
Answer:
1, 3, 5,
Explanation:
A concave mirror is a hollowed sphere that has been cut into parts, each of which has a painted exterior. The plant's image has the qualities of a real, inverted, and smaller image. So, the correct options are A, C and E.
What is Concave mirror?A hollow spherical formed into a mirror when the external surface of the each cut portion was painted, reflecting light from the interior surface. This kind of mirror is known as a concave mirror. When the concave mirror is placed too close to the item, a magnified and phoney image results.
This has an inward-curving reflective surface that faces away from the source of light. Light is reflected internally to a single focus point. Headlights on cars and torches are examples of concave mirrors. But, as the distance grows between the object and the mirror, the size of the image reduces and a real image is produced.
Thus, the correct options are A, C and E.
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Your question is incomplete, most probably the complete question is :
Leo places a plant in front of the center of curvature of a concave mirror. Which characteristics will the image of the plant have? Check all that apply.
Real virtual inverted upright smaller larger same size.How many kilometers are in 52,000 meters? If there are 1,000 meters in one kilometer
Answer:
52 kilometers
Explanation:
Since we know that there are 1,000 meter in 1 kilometer, we can divide 52,000 by 1,000 (because we want know that every 1,000 meter is 1 kilometer).
52,000/1,000= 52 kilometers
That's your answer.
Hope this helped! :)
Answer:
52 Kilo
Explanation:
52,000/1,000= 52 kilometers
If you are test-driving a Bugatti Veyron and you go from 0 m/s to 124 m/s in 3.7 seconds, what was your acceleration?
Answer:
initial velocity (u) = 0 m/s
Final velocity (v) =124 m/s
Time (t) = 3.7 s
acceleration (a) =?
Now
A =V-U /T
= 124-0 /3.7
= 33.51 m/s^2
The lines on the position-time graph shows the velocities of different vehicles. Which line represents a vehicle moving at a constant velocity?
A. D
B. B
C. A
D. C
A cyclist acceleration from 0m/s to 8m/s in 3second. what is his acceleration?
Answer:
2.66 m/s² .
Explanation:
Initial velocity , u = 0 m/s
Final Velocity , v = 8 m/s
Time Taken , t = 3 s
So , Acceleration = (v-u)/t = (8 m/s - 0 m/s) /3 sec . = 8/3 m/s² = 2.66 m/s²
A billiard ball traveling at 4m/s has an elastic head-on collision with a billiard ball of equal mass that is initially at rest. The first ball is at rest after the collision. What is the speed of the second ball after the collision?
Answer:
The speed is 4m/s because the size is the same.
Explanation:
The speed of the second ball after the collision is 4 m/s.
What is law of conservation of momentum?According to the law of conservation of momentum, The overall momentum of two or more bodies acting on one another in an isolated system stays constant unless an external force is introduced. As a result, momentum cannot be gained or lost.
Let the mass of each billiard ball is m.
Before collision speed of first billiard ball: u = 4 m/s.
Before collision speed of second billiard ball: U= 0 m/s.
After collision speed of first billiard ball: v = 0 m/s.
After collision speed of second billiard ball: V= ?
From conservation of momentum, we can write:
Total momentum before collision = Total momentum after collision
mu +M.0 = m.0 + m.V
u = V
V = 4 m/s.
The speed of the second ball after the collision is 4 m/s.
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A car decelerates uniformly from 54 m/s to 38 m/s in 8.0 seconds. How far does it travel dunng this time?
Answer:
368m
Explanation:
dx=vt
54+38/2=46
46*8=368m
What makes the yardstick test a direct measurement of reaction time?
A.
The further the yardstick falls, the slower the reaction time.
B.
Yardsticks have numerical markings for length.
C.
Yardsticks are designed to measure reaction time.
D.
all of the above
Please select the best answer from the choices provided.
A
B
C
D
Answer:
A. the further the yardsticks falls, the slower the reaction time.
Answer:
The further the yardstick falls, the slower the reaction time.
Explanation:
its A
why does a thrown football have both potential and kinetic energy?what is the combined energy called?
i will give brainliest to who ever answers this question in a paraghraph
Answer:
The thrown football has Potential or stored Energy, PE, by virtue of its position in the air and the ability for it to fall by itself. The thrown football also has Kinetic Energy, KE, given that the ball is in motion and requires an equal and opposite amount of energy to stop it. Both the PE and the KE are forms of Mechanical Energy, ME and the Mechanical Energy of the football is equal to the sum of its Potential and Kinetic Energy. That is ME = PE + KE
Explanation:
Potential energy, PE, is the energy that is the held or stored energy of a body such that the body is able to do work without the addition of energy from an external source
A thrown football that has an elevation or height above the floor level has the capacity to come back down and bounce on the floor without the presence of assistance at the topmost height of the football. Therefore, the thrown football has potential energy, given to it by the thrower
Kinetic Energy, KE, is the energy possessed by a moving that comes from the motion of the object
Given that the thrown football is in motion, it posses kinetic energy
Therefore, the thrown football possesses both potential energy and kinetic energy which are forms of mechanical energy ME
The combined energy of the football is therefore called the Mechanical Energy ME of the ball which is the sum of the potential and kinetic energies of the football, given as follows;
The Mechanical Energy of the football = The Potential Energy of the football + The Kinetic Energy of the football
∴ ME = PE + KE
a 5 kg object is pushed with a 10 n force for 1 second how much will the momentum of the object change?
Answer:
5 kg m/s
Explanation:
Because you need 5 N to push a 5 kg object so 5 will be left over
Without the comma, the above sentence appears to be asking if the ______ actually ate bob.
a.friend
b.bird
Answer:
b. bird
i am pretty sure this is right, but i cant be sure bcause i know what the sentence is.
plz help me with this brain teaser
TRAVEL
_________
cccccccccc
Answer:
horse drawn carriage/buggy
Explanation: