Answer:
The object is using kinetic energy if it is in motion
Explanation:
Hope this helps and may God bless you<3
A child pushes a shopping cart at a constant, average velocity of 2.8 m/s. How long will it
take this child to push the cart 13.2 m down the aisle?
The amount of time required for the child to push the cart around 13.2 m down the aisle is 4.71 seconds.
As we know the average velocity is the rate of change of position or displacement with respect to the time taken during which the changes in displacement were occurring .
Since we know that velocity = distance/time, out from which we can say that,
time = distance / velocity
As we are provided with velocity v = 2.8 m/s and distance d =13.2
so , time taken = d/v
= 13.2/ 2.8
= 4.71428571429
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A student standing on top of a 170-m high building threw a stone upward with an initial velocity of 50 m/s. What is the vertical location of the stone in meters, with respect to the top of the building, after 10.0 seconds? (hint: pay attention to the sign here!)
The vertical location of the stone in meters, with respect to the top of the building is 10 m
We'll begin by obtaining the velocity of the stone after 10 s. This is can be obtained as follow:
Initial velocity (u) = 50 m/sTime (t) = 10 sAcceleration due to gravity (g) = 9.8 m/s²Final velocity (v) =?v = u - gt (Since the stone is going against gravity)
v = 50 - (9.8 × 10)
v = 50 - 98
v = -48 m/s
How to determine the location (i.e height)Now, we can obtain the location (i.e height) of the stone as follow:
Initial velocity (u) = 50 m/sFinal velocity (v) = -48 m/s Acceleration due to gravity (g) = 9.8 m/s²Height (h) =?v² = u² - 2gh (since the ball is going against gravity)
(-48)² = 50² - (2 × 9.8 × h)
2304 = 2500 - 19.6h
Collect like terms
2304 - 2500 = -19.6h
-196 = -19.6h
Divide both side by -19.6
h = -196 / -19.6
h = 10 m
Thus, the stone is 10 m high from the top of the building
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11. A wire made of silver has coefficient of linear expansion, 29x10-6/k and length of 10m. A square metal plate made of such silver and side length 10m expands as its temperature changes from 25°C to 78°C. Determine the ratio of the area of the square and length of the metal plate and length at the final temperatures.
By using the coefficient of linear expansion, the increase in the length of the metal plate is by 0.015m and in the area is by 0.3074[tex]m^2[/tex].
The rate of change in length of a metal per degree change in temperature is known as the coefficient of linear expansion.
Given:
Coefficient of linear expansion, α = 29 x [tex]10^-^6[/tex]/k
Length, L1 = 10m
T1 = 25℃
T2 = 78℃
ΔT = 78 – 25 = 53℃
To find:
Change in length (ΔL) and area (ΔA) of metal plate = ?
Formula:
ΔL = α L1 ΔT
ΔA = A1 2 α ΔT
Calculations:
ΔL = 29 x [tex]10^-^6[/tex] x 10 x 53
ΔL = 0.01537m
ΔA = 100 x 2 x 29 x [tex]10^-^6[/tex] x 53
ΔA = 0.3074[tex]m^2[/tex]
A2 = 100.3074[tex]m^2[/tex]
Result:
The increase in the length and area is by 0.015m and 0.3074[tex]m^2[/tex] respectively.
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Explain where energy goes once it is used.
What was the arms race?
A. Competition to gain allies in Europe and Asia as quickly as possible
B. Competition to build more increasingly powerful weapons
C. Race to be the first nation into outer space
if you dont see a number infront of an element (ex.H) (hydrogen) what do i do?
Elements that are written without numbers in front indicate that the are monoatomic.
What are elements?Elements are substances which cannot be split into simpler units by ordinary chemical reactions.
The elements are arranges into a table known as the Periodic Table.
The periodic table arranges elements into 7 horizontal periods and 18 vertical groups.
Elements are usually represented with symbols.
Elements that exists as monoatomic substances such as the metals are written with no number in front. These elements are usually metals and noble gases.
For example;
sodium, Na
Magnesium, Mg
Neon, Ne
Argon, Ar.
Elements that exist as diatomic or polyatomic elements are written with number in subscripts in front of them. These elements are usually non-metallic elements that exists as molecules.
For example;
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Solve for h in PE = mgh.
4. Three masses are connected by a light string that passes over a
frictionless pulley as shown. (a) What is the acceleration of the .
system? (b) What are the tensions in the strings?
m.
Three objects are connected by light threads. The object weighing 5.00 kg and the object weighing 4.00 kg are connected by a string.
What distinguishes strings from acceleration?acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. The pulling force transmitted axially by a string, cable, chain, or other similar one-dimensional continuous object, or by each end of a rod, or another similar three-dimensional object, is referred to as tension. The action-reaction pair of forces acting at the ends of the aforementioned elements can also be used to describe tension.
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in object in motion tend to stay in motion in object in rest tends to stay in rest. "many years before newton wrote this law,__________stated the same idea as the principal of _______.
Many years before newton wrote this law, of motion stated the same idea as the principal of inertia.
What is Newton's first law of motion?
Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
Newton's first law of motion is also called law of inertia because it depends on mass of the object.
Thus, many years before newton wrote this law, of motion stated the same idea as the principal of inertia.
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WILL GIVE BRAINLIEST
Which of the following findings would support the giant impact hypothesis?
The percentage of oxygen in the Moon’s outer layers is identical to that in Earth’s.
The percentage of oxygen in the Moon’s outer layers is much lower than that in Earth’s.
The percentage of oxygen in the Moon’s outer layers is similar to that in Earth’s.
The percentage of oxygen in the Moon’s outer layers is much higher than that in Earth’s.
The support for the hypothesis lies in the fact that; the percentage of oxygen in the Moon’s outer layers is much higher than that in Earth’s.
What is a hypothesis?The term hypothesis has to do with a claim or an explanation of an observation or a phenomenon. The explanation often seeks to shed more light in order to make the meaning of the phenomenon clearer.
The giant impact hypothesis was one of the theories that were put forward to explain the origins of the moon. We know that the origins of the moon have always been a very important subject of scientific study.
The giant impact hypothesis holds that the moon was formed from the debris that were collected when an object collided against the earth after it was just formed.
This hypothesis is often backed by the fact that there are still many striking similarities between the earth and the moon. Hence, the percentage of oxygen in the Moon’s outer layers is much higher than that in Earth’s.
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A block of mass 3/5 kg is placed on a ramp whose incline angle 8 satisfies
cos = 5/6 and sin 8 = 5/9
The coefficient of static friction (us) and the coefficient of kinetic friction (uk) between the block and
the surface of the ramp are
Hs = 4/5 and Hk = 2/5
What is the magnitude of the force of friction acting on the block?
(Use g = 10 m/s².)
O 10/3 N
O2N
04 N
8/3 N
4/3 N
05 N
Answer:
Explanation:
Answer:
Explanation:
Question 4
3 tries left
Malcolm's mother has schizophrenia, as does his cousin. Malcolm fears he has inherited the
"schizophrenic gene" and will develop schizophrenia. Which of the following statements best reflects
current scientific understanding of the role of genetics in the likelihood of Malcolm developing
schizophrenia?
OA. Genetic factors create a predisposition or likelihood-not a certainty-that certain
behaviors or disorders will develop.
OB. Current research suggests that there is a cluster of genes that define whether or not an
individual will develop schizophrenia.
OC. The presence of a supportive father in the home will eliminate the possibility of Malcolm
developing schizophrenia.
OD. Proper nutrition and exercise can prevent the expression of schizophrenic genes.
Submit
Malcolm's mother has schizophrenia, as does his cousin. Malcolm fears he has inherited the "schizophrenic gene" and will develop schizophrenia. Genetic factors create a predisposition or likelihood-not a certainty-that certain behaviors or disorders will develop.
What affects a person with schizophrenia?Schizophrenia is a severe mental illness that causes its victims to perceive reality in peculiar ways. Schizophrenia can result in severely illogical thinking and behavior, incapacitating hallucinations, and delusions that make it difficult to carry out daily chores.
Is schizophrenia curable?Even though there is no known cure for schizophrenia, it is controllable and controlled with medication and behavioral therapy, especially when it is identified and treated early.
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Dylan has made two different chemical batteries for a physics project. He is measuring how much voltage the batteries each produce. The first battery produces 3.12 volts, and the second battery produces 2.8 volts. Using the correct number of significant figures, how much greater was the voltage produced by the first battery, compared to the second?
0.3200 volts
0.320 volts
0.32 volts
0.3 volts
The voltage produced by the first battery is 0.32 volt greater when compared to the voltage produced by the second battery
Data obtained from the questionFrom the question given above, the following data were obtained:
Voltage produced by the first battery = 3.12 voltsVoltage produced by the second battery = 2.8 voltsHow great is the voltage of first =?How to determine how great the voltage of the first battery isWe can obtain how great the voltage of the first battery is compared to the voltage if the second battery as follow:
How great is the voltage of first = Volatge of first - voltage of second
How great is the voltage of first = 3.12 - 2.8
How great is the voltage of first = 0.32 volt
Thus, the voltage of the first battery is greater than the voltage of the second battery by 0.32 volt
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Can anyone help with questions 2? :)
A
bultet
is fired from a gun
with a horizontal velocity of 20 msl.
From a height of 120m Calc the speed
at which the buttet will touch the ground.
Lbane 9 = 10 ms. 2]
The correct answer is 97.8 m.
The speed of an object is the rate at which it travels from one place to another in a set period of time. Since it only describes the amplitude of an object's motion and not its direction, it is a scalar quantity. The S.I. unit of speed is m/s.
Initial horizontal velocity u = 20 ms^-1
height, y = 120m
To cover 120m time taken be t sec,
now taking, g = 10 m/s^2
y = 1/2 g t^2
t^2 = 2y / g
t^2 = (2 × 120) / 10
t^2 = 240 / 10
t^2 = 24 s
t = √24
t = 4.89 sec
In 1 sec distance covered is,
x = ut
x = 20 × 4.89
x = 97.8 m
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Messages are sent through a variety of
Answer:
Messages are sent through a variety of : Messages
28). A block weighs 90N and 80N respectively in air and in water. What will be the weight of the block in a brine of density 1.2g/cm?
Answer:
Buoyant force = g M / V * V = g d V where d is the mass / volume (density)
Fw = g * Vw * dw buoyant force of water on block (10 N)
Fbr = g * Vw * dbr buoyant force of brine on block
Fbr / Fw = 1.2 buoyant force of brine is 1.2 times that of water
Buoyant force of brine = 10 * 1.2 N = 12 N
Thus, the block will weight 90 - 12 = 78 N submersed in brine
A toy helicopter flies forward with a force of 15 N into an oncoming wind of 10 N. The force of gravity pulls the helicopter down with a
force of 5 N, but the propeller is providing an upward force of 10 N.
Which of the following accurately describes the helicopter's force?
(1 point)
The toy helicopter is flying forward with a force of 15 N and upward with a force of 10 N.
O The toy helicopter is flying forward with a force of 10 N and upward with a force of 5 N.
O The toy helicopter is flying forward with a force of 15 N.
O The toy helicopter is flying forward with a force of 5 N and upward with a force of 5 N.
D. The toy helicopter is flying forward with a force of 5 N and upward with a force of 5 N".
What is net force?The net force of an object is the resultant force of the object
The sum of the forces acting on the object is the net force of the object.
sum of the vertical forces = force of gravity + upward force
sum of the vertical forces = - 5N + 10 N = 5 N
sum of the horizontal forces = forward force + force of wind
sum of the horizontal forces = 15 N - 10 N = 5 N
Thus, statement that describes the helicopter's force is "the toy helicopter is flying forward with a force of 5 N and upward with a force of 5 N".
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Just question 6 for this page. Tysm
6,240,000,000,000,000,000 electrons
While all states in the United States require veterinarians to graduate from an accredited school, not all require a license to practice veterinary medicine.
A. True
B. False
The given statement is false. All veterinarians require a license to practice medicine.
What is veterinary science?
The study of animals is called veterinary science. In veterinary medicine, the complete care of animals takes place. All the medicine's complete care and protection are given to the animals.
For veterinary science the medical certificates and training required. Proper training and internships are given to the doctors to treat the animals. Without proper treatment it is not possible to treat animals.
Therefore, The given statement is false. All veterinarians require a license to practice medicine.
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Why does the speed of an object thrown straight up into the air begin to decrease after it is thrown?
Because gravity pulls it towards the ground and makes the distance it can cover in one second decrease. Or you can say Due to symmetry in the motion.
Hope this helps, please give me brainliest if I'm correct. :)
The speed of an object in the air begins to decrease after it is thrown because the force of gravity makes it accelerate in a downward direction.
What is a Gravitational Force?There are a lot of pushes and pulls in the cosmos. Even if it's just the ground, we are constantly pulling or pushing something. The strong force, the weak force, the electromagnetic force, and the gravitational force are the only truly fundamental forces in physics from which everything else is generated.
Any pair of mass-containing objects will gravitationally pull toward one another. The gravitational force is referred to as attractive because it continually tries to pull masses together rather than push them apart. In truth, you and everything else in the universe is being pulled in different directions. It is known as Newton's Universal Law of Gravitation.
So, when the object is thrown straight up into the air with its initial speed gravity starts acting due to which its speed will slow down after some time, and then it will come back down on the surface.
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When a projectile is released, why is there a change in speed in one dimension but not the other?
Answer choices
A. There can be only one force acting on an object at a time
B. A projectile only moves in one dimension.
C. A projectile only moves in two dimensions because it is thrown.
D. The force of gravity only acts in a downward direction
The change in the speed of a projectile is because the force of gravity only acts in a downward direction.
What is a projectile motion?A projectile motion is a type of motion, in which object thrown or projected into the air, is subject to only the acceleration of gravity as the only force.
How many dimension does a projectile move?A projectile motion is a motion that occurs in a plane. Motion in a plane is also referred to as a motion in two dimensions.
The reference point of a projectile motion will be the origin and the two coordinate axes X and Y.
What causes change in speed in one direction of a projectile motion?When an object is thrown upwards, the force of gravity tends to oppose the motion of the object, this causes the speed of the object to decrease and eventually become zero at the maximum height.
As the object begins to descend, the speed starts to increase because force of gravity is acting in the same direction as the object's motion.
Horizontal velocity of a projectile does not change, because force of gravity only acts in a downward direction.
Thus, the change in the speed of a projectile is because the force of gravity only acts in a downward direction.
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Multiple Choice
What is one of the most famous examples of early 1900s investigative journalism in regard to consumer advocacy?
O Upton Sinclair's The Jungle
O J. D. Salinger's Catcher in the Rye
O Harper Lee's To Kill a Mockingbird
O Aldous Huxley's Brave New World
Question
Answer:
Upton Sinclair's:The Jungle
Explanation:
The novel portrayed the harsh conditions of immigrants in the United States in industrialized cities.
1. An object falls from the St. Louis Gateway Arch and hits the ground in 6 seconds.
The arch is 630 feet tall. Calculate the average speed of the falling object.
Answer:
H = Vav t
Vav = 630 ft / 6 sec = 105 ft/s
Check:
H = Vav * t = 105 ft/sec * 6 sec = 630 ft
Three boxes, A, B, and C, are placed on a frictionless surface as shown in the diagram below. If you push on box A with a force of 8.25 N, find the contact force (in N) between each pair of boxes. Here mA = 6.25 kg, mB = 3.25 kg, and mC = 1.50 kg. contact force between A and B N contact force between B and C N
The contact force (in N) between each pair of boxes is mathematically given as
F_{ab} = 3.56 N
F_{bc} = 1.2 N
What is the contact force (in N) between each pair of boxes.?Generally, Any force that is generated as a consequence of two objects coming into touch with one another is referred to as a contact force. Contact forces are present everywhere and are the cause of the vast majority of macroscopic groupings of matter's obvious interactions with one another.
In conclusion, The equation for is Acceleration of the system is mathematically given as
a = 8.25 / (5.85 + 2.95 + 1.50)
a= 0.8 m/s^2
Therefore
F_{ab} = (Mb + Mc)*a
F_{ab} = (2.95 + 1.50) * 0.8
F_{ab} = 3.56 N
F_{bc} = Mc * a
F_{bc}= 1.5 * 0.8
F_{bc} = 1.2 N
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Which type of friction occurs when two objects slide past each other?
O fluid
O normal
O rolling
O sliding
if a car is resting at the top of a hill is suddenly pushed and sent rolling down the hill, what is the acceleration of the car if it arrives at the bottom of the hill 7 seconds later doing 35 m/s?
The acceleration of the car if it arrives at the bottom of the hill is a = 0.204 m/s².
Equation :Given data,
time = 7s
speed = 35 m/s
distance = ?
acceleration = ?
To find distance using the formula,
speed = d / t
d = s / t
d = 35 m/s / 7s
d = 5 m
To find acceleration using formula,
d = ut + 1/2at²
So putting the data in this formula we get,
5 = 0 x 7 + 1/2 a 7²
5 = 1/2 a 7²
a = 5 / (1/2 x 49)
a = 5 / 24.5
a = 0.204 m/s²
What means acceleration?Any process where the velocity changes is referred to as acceleration. There are only two ways to accelerate: changing your speed or changing your direction, or changing both. This is because velocity is both a speed and a direction.
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In this problem, assume that the sling, when unfolded, was roughly =5.75 ft in total length and that the rock weighed a half a pound.
If David whirled the sling such that the sling was at an angle =4.43∘ below the horizontal, with what speed did the rock strike Goliath? Assume there is no air friction and that the drop in height due to gravity is minimal.
Suppose David missed. What distance would the rock travel before striking the ground if David released it from a height of =4.75 ft? Assume there is no air friction.
The rock from the sling will hit Goliath at the speed of 6m/s and if it didn't hit Goliath then it continues its trajectory and hits ground at the velocity of 14 m/s due to longer surfing in the air by the rock.
What is Newton's law of motion?Newton gave three laws of motion which can be utilised to find the velocity, acceleration and displacement of a body. These laws are only applicable for constant acceleration.
Given:
Distance of the sling when pulled = 5.75 ft
Angle with the horizontal = 4.43°
Distance from the ground = 4.75 ft
1) In the first case The Rock hits Goliath in mid air.
We have all the values required for calculation of the final velocity of the rock while it hits Goliath we will have to just substitute these values in Newton's first law of motion.
Where,
Initial velocity of the rock 6.89m/s
On substitute this values in Newton's first law of motion we get.
Final velocity = 6.72 + π × 6.98 g -9.8e
Final velocity = 6 m/s
2) If the rock does not hit Goliath then the rock will continue the trajectory for some longer. It is given in the question that the distance between these links and the ground is equal to 4.75 feet.
Adding the progression value in the velocity with which it hits the Goliath.
We get, the velocity of the rock when hits the ground equal to = 14m/s.
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How many quarts are equal to 5 pounds of ethanol? The density of ethanol is 0.789 g/mL.
The required quarts that is equals to 5 pounds of ethanol would be 3 quarts if the density of ethanol is 0.789 g/mL.
What is the density?Density is the ratio of mass and volume.
density = mass/volume
The density of ethanol is 0.789 g/mL.
Convert pounds to grams
∵ 1 pounds = 453.592 grams
∴ 5 pounds = 2267.96 grams
So the mass of ethanol would be 2267.96 grams
Density Equation
density = mass/volume
Solve for volume.
volume = mass / density
volume = 2267.96 g / (0.789 g/mL)
volume = 2267.96 g / (0.789 g/mL)
volume = 2874.47 mL
Convert milliliters to quarts.
∵ 1 mL = 0.00105669 quarts
⇒ 2874.47 mL × 0.00105669 qt /1 mL
⇒ 3 quarts
Hence, the volume of ethanol would be 3 quarts.
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I need help with these two problems please and thank you
The value of A in the linear equations are 0.0484 and 29.87.
What is linear equation?a) Part A
y = x/(AB)
A=x/By
A = 3.60/(5.55*13.4)
A = 0.0484
b) Part B
y = Ax + [tex]1/2 Bx^{2}[/tex]
A = ( y - [tex]1/2 Bx^{2}[/tex])/x
A = 29.87
In a linear equation, there are just one or two variables. A linear equation's rules state that no variable can be divided by a sum greater than one or utilized as the denominator of a fraction. When the values that make a linear equation true are determined and plotted on a coordinate grid, all the points fall on the same line.
The slope, x-intercept, and y-intercept are the components of the standard form, which is written as ax+by+c=0 an x + b y + c = 0.
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