Answer:
so people cant hack into a device (phone,tablet,computer) & find out where you are & kill you.
Explanation: very useful if you have any devices
a 0.70 kg ball is moving horizontally at 5.5 m/s when it strikes a vertical wall and rebounds with speed 3.9 m/s. what is the magnitude of the change in its linear momentum?
Magnitude of the change in its linear momentum is 0.77 kg m/[tex]s^{2}[/tex]
What is linear momentum?
A large, moving object has more momentum than a smaller, moving more slowly, according to the scientific definition of linear momentum, which is in line with the majority of people's intuitive understanding of momentum. The result of a system's mass times its velocity is its linear momentum. Linear momentum is represented in symbols as
p =mxv
The relationship between momentum and an object's mass and speed is straightforward. Therefore, an object's momentum increases with increasing mass or velocity. A vector with the same direction as velocity v is said to have momentum (p).
kg m/s is the SI unit for momentum.
The magnitude of the ball's momentum change is
Δp = 0.7(5.5-3.9)
Δp= 0.77kgm/[tex]s^{2}[/tex]
Magnitude of the change in its linear momentum is 0.77 kg m/[tex]s^{2}[/tex]
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For an lc circuit, when the charge on the capacitor is one-half of the maximum charge, the energy stored in the capacitor is?.
Energy stored in capacitor is one- quarter of the total energy
What is capacitor?
Similar to a miniature rechargeable battery, the capacitor is an electric component with the capacity to store energy in the form of electrical charges that produce a potential difference, or static voltage.
Two parallel conductors (metal plates) are separated by a dielectric material in the simplest capacitor design. The capacitor plate charges up when a voltage source is connected across it. Positive and negative charges will be present on the metallic plates connected to the positive and negative terminals, respectively.
A potential difference across the capacitor is produced by the buildup of charges in the wires. The capacitor's capacity to hold a charge is determined by how much charge has built up. Capacitance is the term used to describe this ability to store a charge. The voltage created across the capacitor is precisely proportional to the charge that has built up in it:
Energy stored in a capacitor
U=\frac{1}{2}\frac{q^{2}}{C}
charge on the capacitor is one half q=\frac{1}{2}q
U1=\frac{1}{2}*\frac{1}{4}\frac{q^{2}}{C}
U1=\frac{1}{4}*\frac{1}{2}\frac{q^{2}}{C}=\frac{1}{4}*U
energy stored in capacitor is one- quarter of the total energy
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Emma prepared two glasses of water at two different temperatures. She added a spoonful of table salt to the cold water in glass #1 and a spoonful of rock salt to the hot water in glass #2. She observed that the spoonful of table salt in glass #1 dissolved faster than the spoonful of rock salt in glass #2. Based on this observation, Emma concluded that salt dissolves faster in cold water than in hot water.
What question was Emma trying to investigate in her experiment? (2 points)
A: Are table salt and rock salt soluble or insoluble in cold and hot water without stirring?
B: Does surface area affect the rate of dissolving of a substance in water?
C: Does temperature affect the rate of dissolving of a substance in water?
D:What type of salt dissolves faster in water when stirred at different temperatures?
(PLEASE, ILL GIVE BRAINLYIST THINGY)
Based on the data provided in Chart 2, describe the relationship between the mass of the ice and the transfer of thermal energy in the investigation. Use evidence and scientific reasoning to support your answer.
The amount of heat transferred is also directly proportional to the mass. To cause an equivalent temperature change in a doubled mass, you need to add twice the heat.
Here we can se that ice having mass of 60 gram has initial temperature 20°C and final temperature 10°C and ice of mass 300 gram has initial temperature 20°C but final temperature of 7°C. So amount of heat transfer is more in ice of greater mass
What is thermal energy ?Thermal energy is the term used to describe the energy present in a system that determines its temperature. The movement of thermal energy is heat. How heat is transmitted across various systems and how work is accomplished in the process is the subject of a large branch of physics called thermodynamics.
When heat is converted to energy, it becomes part of the object's internal energy. The kinetic energy that results from the particles starting to travel more quickly is one type of this internal energy. A rise in temperature is a reflection of this more active particle motion.Learn more about Thermal Energy here:
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Use the information and table to answer the following question.
Two car enthusiasts are doing research to see which car has the largest acceleration. They find the following
table after an internet search:
Based on the table, which car is capable of the largest acceleration?
A The Corvette, because it has the smallest mass
B The Mustang, because it has the largest ratio of force to mass
C The Corvette, because it has the largest ratio of force to mass
D The Mustang, because it has the largest mass
B The Mustang, because it has the largest ratio of force to mass car is capable of the largest acceleration
What is acceleration with a power limit?On a dynamometer, engine torque is measured at constant speed. Powertrain The quantity necessary to accelerate the inertia of the spinning components reduces the actual torque provided to the drivetrain.
Standard automobile and truck engines generally provide 100 to 400 lb-ft of torque. The crankshaft of an engine is continually rotated (or twisted) by the pistons inside the engine as they reciprocate up and down on it.
Therefore, your automobile will accelerate faster the more torque it has. The ability of an engine to manage a load and produce a specific amount of power to rotate the engine on its axis is represented by torque, which is an essential component of producing power from a car's engine.
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A tesla roadster is in development on a racetrack in California, Elon Musk as the driver floors it to start the test.
The car accelerates from 0-60MPH (0-27m/s) in 1.9 seconds. What is the car’s acceleration?
Answer in m/s2 to the nearest whole number, without units in answer
Answer:
14 m/s^2
Explanation:
Acceleration = Δv / Δt = 27 m/s / 1.9s = 14 m/s^2
if a runner's power is 400 w as she runs, how much chemical energy does she convert into other forms in 10 minutes?
According to the given statement 240kJoules chemical energy does she convert into other forms in 10 minutes.
What is Chemical energy?The bonds of chemical molecules contain energy. Exothermic reactions are those in which chemical energy is released during the reaction, frequently in the form of heat. Heat-driven reactions may store part of the heat energy as chemical energy in newly created bonds.
Briefing:To obtain the answer in SI units of energy, we just need to convert the supplied time (ten minutes) into the proper units (seconds) (Joules). By multiplying, 10 minutes * 60 seconds/minute equals 600 seconds when converted to seconds.
We use this then to find the energy converted by the runner:
Power = Energy Transferred/Time
400 W = E/600sec
400 W * 600sec = E
E = 240000 Joules = 240kJoules
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A projectile of mass 0.491 kg is shot from a
cannon. The end of the cannon’s barrel is
at height 6.6 m, as shown in the figure. The
initial velocity of the projectile is 8.1 m/s.
The projectile rises to a maximum height of
∆y above the end of the cannon’s barrel and
strikes the ground a horizontal distance ∆x
past the end of the cannon’s barrel. How long does it take the projectile to hit the ground?
The time taken by the projectile to hit the ground is 1.92 s if the end of the cannon’s barrel is at height 6.6 m and the initial velocity of the projectile is 8.1 m/s.
T = ( [tex]u_{y}[/tex] + √ [tex]u_{y}[/tex]² + 2 g H ) / g
T = Total time taken
g = Acceleration due to gravity
H = Height above the ground
[tex]u_{y}[/tex] = Y-component of initial velocity
θ = 48°
u = 8.1 m / s
g = 9.8 m / s²
H = 6.6 m
sin θ = [tex]u_{y}[/tex] / u
[tex]u_{y}[/tex] = 8.1 * sin 48°
[tex]u_{y}[/tex] = 6 m / s
The total time taken,
T = ( [tex]u_{y}[/tex] + √ [tex]u_{y}[/tex]² + 2 g H ) / g
T = ( 6 + √ 6² + ( 2 * 9.8 * 6.6 ) ) / 9.8
T = ( 6 + √ 165.36 ) / 9.8
T = 18.86 / 9.8
T = 1.92 s
Therefore, the time taken by the projectile to hit the ground is 1.92 s
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An atom of sodium and an atom of fluorine will combine to form sodium fluoride. Which of the following correctly describes sodium fluoride?
An atom of sodium and an atom of fluorine will combine to form sodium fluoride which is a compound: option D.
What is a chemical compound?A chemical compound is a substance that is formed when two or more elements are chemically combined to form a single compound.
A compound can either be ionic in nature or covalent in nature.
Ionic compounds are formed when two oppositely-charged ions are held together by electrostatic forces of attraction.
For example, when sodium combines with fluorine, they form ions that are held together by electrostatic forces.
Covalent compounds are formed when atoms of different elements share electrons in covalent bonds.
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Complete question:
An atom of sodium and an atom of flourine will combine to form sodium flouride. Which of the following correctly describes sodium flouride?
Group of answer choices
A. an element
B. energy
C. an atom
D. compound
Say you’re on a walk over the Narrow’s Bridge and you drop a rock to the water below.
You count how many seconds it takes for the rock to hit the water.
It takes 3.5 seconds.
How fast in m/s was the rock traveling when it hit the water?
(answer in m/s to the nearest whole number. Do not include units)
You count how many seconds it takes for the rock to hit the water.
It takes 3.5 seconds, then it would have been moving with a velocity of 34.335 m/s was the rock traveling when it hit the water.
What are the three equations of motion?There are three equations of motion given by Newton,
v = u + at
S = ut + 1/2×a×t²
v² - u² = 2×a×s
As given in the problem if you count how many seconds it takes for the rock to hit the water. It takes 3.5 seconds,
By using the first equation of the motion,
v = u + at
v = 0 + 9.81 × 3.5
v = 34.335 m / s
Thus, the velocity of the rock when it hit the water was 34.335 m/s.
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Mars, venus, and earth are much less heavily cratered than mercury and the moon. This is explained by the fact that.
On planets like Venus, Earth, and Mars do not see as many craters because most of them have been eroded away by wind, rain or volcanic activity. We do not see any craters Jupiter, Saturn, Uranus, and Neptune because there is no visible solid surface for the meteors to hit.
Craters heavily dominate the surfaces of Mercury and the Earth's Moon because both the bodies lack water on their surfaces that would erode impact craters with time. They also lack an atmosphere which could disintegrate meteoroids before they impact the surface.
As smaller planets have less gravitational pull as compared to large planets therefore impactors will strike at lower speeds. Greater is the mass of the impactor, greater is the size of crater. Craters are often circular.
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A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes atthe same time. Which person will get to a state of zero acceleration first?O heavv man© both should arrive at the same timeO light womanO not enough informationQuestion 21 ptsA 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 seconds. The speed of the car justbefore the brakes were applied was0 15O 45O 1.20 30© none of these
Take into account that the heavy man weighs more than light woman. It means that heavy man experiences a greater acceleration and then, he increases his speed more rapidly.
Consider that air resistance depends on different factors, and one of them is the speed of the object. The state of zero acceleration is reached when the force of gravity equals the air resistance force. In this case, the air resitance force reaches it maximum in equal times for both heavy man and light woman.
Althoug the light woman is less masive, the magnitude of the air resistance is lower and then it requires less time to reach the equilibrium. The air resistance force on te heavy man has a greater magnitude, however, the man accelerates more rapidly and then the time for the equilibrium is compensated.
Four forces are acting on an object. the earth pulls the box down with a 100 n force of gravity. the floor pushes the box up with a 100 n normal force. a student pushes the box to the right with a force of 50n. friction between the ground and the box oppose the motion of the box with a 30n force to the left. what is the net force on the box?
The net force on the object on which four forces are acting on is 20 N to the right.
What is net force?The net force acting on an object is the vector sum of all the forces that act upon an object.
Net force gives the resultant force acting on a given object at given period of time.
Mathematically, the net force on an object can be obtained by applying Newton's second law of motion as follows.
F(net) = ma
where;
m is the mass of the object
a is the acceleration of the object
The net vertical force on the object is calculated as follows;
F(upward) = 100 N - 100 N = 0 N
The net horizontal force on the object is calculated as follows;
F(horizontal) = 50 N - 30 N = 20 N
Thus, the net force on the object is acting towards the right of the object.
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A plane takes off and is flying forward with 10,000 N of applied force, and experiences 10,000 N of air resistance. It has 20,000 N of gravitational force and 20,000 N of lift (upward) force. Show how the forces affect the plane.
The plane is being affected by uneven forces. A net force is acting in the forward direction.
A force is an influence that can alter how an object moves. A mass-containing object's velocity can alter under pressure, causing it to accelerate. The force can also be easily defined as a push or a pull. A pressure is a vector quantity since it has both importance and direction.
what is internet force?
The vector sum of the forces acting on a particle or object is known as the internet force.
The impact of the individual forces on the motion of the particle is replaced by the internet force, a single force
Task Force for Internet Engineering The technical standards that make up the Internet protocol suite are managed by the Internet Engineering Task Force (IETF), a standards body for the Internet. All of its members are volunteers, and neither a formal membership list nor requirements exist.
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Label the graph below with the appropriate phrase.Question 5 options:TimeFaster and faster growth as population becomes largerPopulation sizeSlow growth when population is small1.A. 2.B. 3.C4.D
Looking at the graph and its missing parts, we can identify the following items to fill each box:
A. Population Size.
Since the population size is a dependent variable in relation to time, we should use it in the vertical axis.
B. Slow growth when population is small.
In the first part of the graph, the population is small and also grows slowly.
C. Faster and faster growth as population becomes larger.
In the final part of the graph, the population is big and also grows fast.
D. Time
Since the time usually is an independent variable, we should use it on the horizontal axis.
A person exerts a force of +250 N on a large crate, but the crate does not move. What would the total force from both the crate and the person be?
The total force from both the crate and the person be 500 N.
According to question, the system is in rest.
The force from crate is 250 N and from a person is also 250 N. So, the total force is 500 N.
Total force = 250 + 250
Total force = 500 N
Force is push or pull of an object. force is the product of mass and acceleration and its S.I. unit is newton represented by N.
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how far do you have to descend in air to experience the same increase in pressure as descending 10ft deep in water?
We have to descend 33 feet in air to experience the same increase in pressure.
The pressure exerted by water on a unit surface area is known as hydrostatic pressure. The pressure varies with the depth of water. For every 33 feet of depth which is equal to 10 meters, the hydrostatic pressure increases by 1 atmosphere (atm).
There are many animals that live in the greater hydrostatic pressure such as - whales they can withstand thousands atmosphere of pressure. Going deeper into the water ca cause some problems such as blocking of ear drums, squeezing of lungs, feeling a heavy load on chest and etc.
The divers face these consequences while they go deep into the ocean. The pressure increases and they feel their ear getting blocked.
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Bill and his daughter Susan are both standing on identical skateboards (with really good frictionless ball bearings), initially at rest. Bill weighs three times as much as Susan. Bill pushes horizontally on Susan's back, causing Susan to start moving away from Bill.
Required:
a. When they push each other, who feels the larger force? Provide reasoning.
b. Just after Bill stops pushing, who moves faster?
a. Susan will feel a larger force than Bill
b. After Bill stops pushing, Susan will move faster.
Bill has more inertia value than Susan. With the same force applied, Bill will easier to push Susan because Susan's weight is 3 times smaller than Bill's.
Force is the action of pushing or pulling applied to objects. The value of force depends on the mass and acceleration of objects. It can be written as
F = m . a
where F is force, m is mass and a is acceleration.
In the same force, Bill's weight is 3 times larger than Susan's. Hence, Bill's acceleration will 3 times smaller than Susan's and it will make Susan move faster.
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A B-1 bomber weighs 86,000 kilograms. Why does it not have any momentum if it is waiting to take off?
The frame of reference you are operating in determines the momentum. The overall momentum will be 0 if you operate in a frame of reference where the center of mass is stationary.
a bomb before explosion does mot have any kind of external forces, and here we see how the momentum does not affected by before Collison.
According to the law of conservation of momentum, the combined momentum of objects that interact stays constant. This implies that the overall momentum prior to explosion equals the total momentum following a explosion.
P = mv determines an object's momentum prior to impact.
Its velocity and momentum are unaffected in the absence of an external force prior to the impact.
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A 0.6 kg object moves at a constant velocity of 2 m/s, traveling a total distance of 30 m. Using the work-energy theorem, what is the net work on the object? (1 point)
A. 2.4 J
B. 0 J
C. 1.2 J
D. 36 J
Answer: B. 0 J
Explanation:
A car contains a worn out engine with a power of 32 000 W. The car takes 9.0 s
to accelerate from reat to 15 in/s. A mechanic replaces the engine with a more
powerful but otherwise identical one. The new engine has a power of 62 000 W. Explain how the new engine will affect the time it takes for the car to accelerate from rest to 15m/s
Answer:
32000 W, relates to a transfer of 32000 joules per second. It takes 9 seconds for that engine, therefore total energy transfer = 9 * 32000 = 288000 J. With an engine of 62,000 W, assuming mass of the car is unchanged we still need that 288000 j of energy to accelerate to 15 ms-^1. So to find how many seconds as total amount of energy wasted is the same for before engines, you can divide the total energy requirement by the intake rate of the new engine (62000 Joules per second) = 288000 / 62 000 = 4.65 (3 sf) seconds.
Looking at this number it looks right as the engine is about twice as powerful so you would expect a less than half decrease. Hence similarly you can do 9 divided by 62000/32000 = 4.64 (3sf) second as-well, which is just as quick to do.
Explanation:
W
Helppp please i think I know the answer but i want to be sure
Answer: D) 0-3 seconds
Explanation:
5. Kwame is measuring the dimensions of a box he will be using in a coming experiment. He measures the dimensions of the box as 0.885 meters wide 0.20 meters deep, and 0.75 meters tall. Using the correct
number of significant figures, what is the volume of this box?
0.13m³
0.133m³
0.1328m³
0.1327500m³
Volume of the box is 0.13275 m^3
It is given that
height of box = 0.20 meters
width of box = 0.885 meters
length of box = 0.75 meters
Every three-dimensional object occupies some space. This space is measured in terms of its volume. Volume is defined as the space occupied within the boundaries of an object in three-dimensional space. It is also known as the capacity of the object.
From this we can get that the given box is a cuboid and volume of a cuboid is given by
Volume = length x width x height
Volume = 0.75 x 0.885 x 0.20
Volume = 0.13275 m^3
Hence, volume of box is 0.13275 m^3
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If the satellite takes 2.3 years to orbit the Sun, what is its average orbital speed in m/s?
Answer:
V orbital=GM−−−−√R is the formula for orbital speed
Explanation:
I hope this helps
0.0012 g is how many orders of magnitude smaller than 0.0012 kg?
Enter your answer as a number
There are three orders of magnitude difference between 0.0012 grams and 0.0012 kilograms.
What is magnitude?
The definition of magnitude is "how much of a quantity." In order to compare the speeds of an automobile and a bicycle, for example, the magnitude can be utilised. It can also be used to describe how far an object has travelled or how much an object weighs in terms of its magnitude. What then is magnitude in the field of physics? Magnitude is a term used in physics to describe an object's maximal size and direction. Scalar and vector quantities both use magnitude as a common factor. We are aware that scalar quantities are those that have just magnitude by definition. Those quantities with both magnitude and direction are considered vector quantities.
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If the distance between two objects is decreased to one fourth of the original distance, how will this decrease change the force of attraction between the objects?
If the distance between two objects is decreased to one-fourth of the original distance, the force of attraction increases sixteen-fold.
What is the effect of the decrease in the distance on the force of attraction between two objects?The effect of the decrease in the distance on the force of attraction between two objects is determined from the law of gravitational attraction as follows:
F = G * m₁ * m₂ / d²where;
F is the gravitational force of attractionG is the gravitational constantm₁ and m₂ are the masses of the two objects respectively.From the equation above, G, m₁, and m₂ are constant.
Hence, the force of attraction, F is given as;
F = 1 / (d/₄)²
F = 1 / (d²/16)
Hence, the value of the force of attraction increases sixteen-fold.
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As the objects (now called planets) grew larger their gravitational
attraction increased. apply your understanding of gravity to explain
why this is true.
Mass remains the same regardless of location or gravity. Mars and Jupiter have the same mass as here on Earth.
Gravitational force is greater for objects with greater mass. Gravity also weakens with distance. So the closer objects are to each other, the stronger their attraction. Gravity is directly proportional to the mass of both interacting objects, so larger objects are attracted to each other with greater gravitational force. Therefore, as the mass of either object increases, the gravitational pull between them also increases.
Gravity is the force of attraction between masses. The greater the mass the greater the gravitational force. Gravity weakens rapidly as the distance between the masses increases. Gravity depends on both mass and distance, so puffy, less dense planets have less gravity on the surface much above the mass above or inside clouds. For this reason, planets like Saturn appear to have less gravity than Neptune, despite Saturn's greater mass.
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a circular loop of radius 12.0 cm is placed in a uniform magnetic field. (a) if the field is directed perpendicular to the plane of the loop and the magnetic flux through the loop is 8.00 3 1023 t ? m2, what is the strength of the magnetic field?
Therefore, the strength of magnetic field is 0.177 T
What is magnetic flux?
A measurement of the total magnetic field that traverses a specific area is called magnetic flux. . The precise area selected will determine how magnetic flux is measured. The region can be any size and oriented in relation to the magnetic field as desired.
Every field line travelling across the specified area generates some magnetic flux, according to the field-line representation of a magnetic field. Another crucial factor is the angle at which the field line meets the region. Only a small portion of the field from a field line that glances through will be added to the magnetic flux. We only take into account the magnetic field vector component that is normal to our test region when computing the magnetic flux.
The magnetic flux is
Phi = B A costheta=BAcos
if we choose a basic flat surface with area AAA as our test area and an angle thetatheta between the normal to the surface and a magnetic field vector (magnitude BBB).
The following expression represents the magnetic flux through the loop in the magnetic field:
Ф=BACosФ
Here, B is the magnetic field's intensity, A is the loop's cross-sectional area, and is the angle between the magnetic field and the plane of the loop's normal.
For B, rewrite the equation.
B= Ф/AcosФ
The formula for the circular loop's surface area is,
A= π[tex]r^{2}[/tex]
Here, r denotes the loop's radius.
For r in, use 12 cm instead.
Replace with, with A, and with in.
A= 4052 x [tex]10^{-2}[/tex] [tex]m^{2}[/tex]
Consequently, the magnetic field's strength is.
B= 0.177 T
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If the scale reads 2 n on spring a, then what is the force on spring b, and what is the magnitude of the force the wall-hook exerts on spring a?.
Two spring scales are pulling in opposing directions on each other. If one scale reads 2 N, the second spring scale will display a value of 3 N.
A spring's ability to exert force on objects fastened to its ends is constant and proportional to how far the spring deviates from its equilibrium length.
What is the spring's force?
A spring exerts a force F = -kx in the direction of its equilibrium position when it is stretched or compressed to a length that differs by an amount x from its equilibrium length. A spring's force works as a restoring force, helping it to return to balance.
The amount of flow per unit time determines a spring's magnitude. First magnitude springs are considered the largest springs and have a minimum daily flow of 64.6 million gallons or 100 cubic feet (cfs).
If a spring is stretched, a force pulling each end toward the other has a magnitude proportional to the length increase from the equilibrium length.
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a 100 g cart initially moving at 0.5 m/s collides elastically from a stationary 180 g cart. a) using the equation in the theory, calculate the final velocity of the 100 g cart.
A 100 g cart is moving at 0.5 m/s that collides elastically from a stationary 180 g cart. Final velocity is calculated to be 0.25m/s.
Collision in which there is no net loss in kinetic energy in the system as a result of the collision is known as elastic collision . Momentum and kinetic energy both are conserved quantities in elastic collisions.
Collision in which part of the kinetic energy is changed to some other form of energy is inelastic collision.
For an elastic collision, we use the formula,
m₁V₁i+ m₂V₂i = m₁V1f + m₂V₂f
For a perfectly elastic collision, the final velocity of the 100g cart will each be 1/2 the velocity of the initial velocity of the moving cart.
Final velocity = 0.5/2
=0.25 m/s.
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