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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an x-ray tube for radiology is at 100 kv. it generates (heat) power of 30 kw. find the effective total resistance of the system
The total resistance when generating power of 30 kW is 3 x 10¯⁶ Ω.
We need to know about power to solve this problem. Power is the energy dissipated because of resistance. The magnitude of power is proportional to current and voltage. It can be determined as
P = I . V
where P is power, I is current and V is voltage.
By using Ohm's Law, power also can be calculated using resistance.
P = V² / R
where R is resistance.
From the question above, we know that
P = 30 kW = 30000 W
V = 100 kV = 100000
By substituting the following parameters, we get
P = V² / R
30000 = 100000² . R
R = 30000 / 100000²
R = 3 x 10¯⁶ Ω
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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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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
A soda bottle rolls off the horizontal desk with velocity of 0.14 m/s. If it took the can 0.85 s to hit the floor, how from the desk did the can land?
The Distance from the desk the can landed when it rolls off the horizontal desk with a velocity of 0.14 m/s is 3.66 m.
What is distance?Distance is the total lenght between two points.
To calculate how far (Distance) from the desk the can landed, we use the formula below.
Formula:
R = ut+gt²/2.......... Equation 1Where:
R = Distance of the can from the desku = Initial velocity of the cant = Timeg = Acceleration due to gravity.From the question,
Given:
u = 0.14 m/st = 0.85 sg = 9.8 m/s²Substitute these values into equation 1
R = (0.14×0.85)+(9.8×0.85²)/2R = 0.119+3.54025R = 3.66 m.Hence, The distance from the desk at which the can land is 3.66 m.
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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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Helppp please i think I know the answer but i want to be sure
Answer: D) 0-3 seconds
Explanation:
A wooden beam is 6.50 m long and weighs 325 N. It rests on two supports that are 3.00 m apart. Jane weighs 575 N. She stands on the beam in the center and then walks toward one end. How close to the end can she come before the beam begins to tip?
Suki can go 0.854 meters to the end before the beam starts to tilt.
Beam length: L = 6.5 m
Beam weight: W b = 336 N
Suki's weight is W s = 590 N.
Suki stands in the middle of the steel beam and moves toward the end. Since the beam is supported by two posts that are spaced three meters apart, the distance she may go before the beam starts to lean is determined by how far she moves from the left support.
Thus;
according to formula
Wb × (3/2) = (Ws × x)
where:
Wb= Beam weight
Ws= Suki's weight
Adding the necessary values results in;
336 × 1.5 = 590 × x
x = (336 × 1.5)/590
x = 0.854 m
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What are the benefits of the Spiral Periodic Table (1960)
The periodic table's spiral shape has the advantage of making the precise atomic number ordering very evident and highlighting the groupings of elements connected by similarities in their chemical properties.
What are the Spiral Periodic Table?This spiral periodic chart is a new representation of the periodic table of the elements usually represented in tabular form.
Benefits of the Spiral Periodic Table
According to their characteristics and electrical configuration, hydrogen and helium have been assigned specific positions in the spiral periodic classification of the periodic table. In addition, this spiral Periodic classification shows the connections between the attributes of the recognized items. Furthermore, it can also to reflect the recurring patterns with recurring indicators in to other clasifications in comparison.
The classification used today scientific community will find use for the knowledge of the element. The recommended categorization will be helpful for learning since it lacks the lengthy form's prevailing flaws,various classes and the periodic table.
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In what 3 ways in which organs of the circulatory system and the respiratory system are protected
The organs of the circulatory system and the respiratory system are protected by the cutaneous system, the thoracic cage, and the immune system.
The cutaneous system is mainly made up of the skin. The skin is made of multiple layers of ectodermal tissue. It protects the body from UV radiations and also cold climatic conditions. The thoracic cage is also called as the rib cage. It is one of the main system that protects the vital organs.
The immune system protects the organs against infections from viruses, bacteria, fungi etc. The immune system is not like the other systems. Because it is made up of cells and not tissues. These cells are sterile.
Therefore, the the three ways in which they are protected are by
Cutaneous systemThoracic cageImmune systemTo know more about immune system
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When the mass of the ice added to the cup increases, the amount of thermal energy needed to change the temperature of the ice…..
(A) Increases
(B)Decrease
(C) Stays the same
Describe a solid, liquid, and
gas found outdoors where
you live.
Answer:
a solid = wood
a liquid = a puddle
a gas = oxygen
Explanation:
These are three things that you can find like in my backyard
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)
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
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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The moon is a 12% waxing crescent phase, located at a 39° angle from the sun. How many hours after sunrise with the moon rise?.
There are 2.6 hours after sunrise with the moon rise.
The new moon rises with the sunrise and the sun is on the eastern horizon. On this day, the Moon crosses the daytime sky with the Sun. There is a new moon in the sky during the day, but it is not visible from Earth. On new moon days, the moon is between the earth and the sun. at 270 degrees.
The Moon completes its crescent phase enters the third quarter of its congressional period and becomes a waning crescent until it reaches a new lunar phase to restart the cycle. And indeed, the position of the Moon around the Earth plays a role in solar and lunar eclipses. His quarter of the Moon is visible from Earth. That is, the sun-side half of the moon is visible making it look like half a pie.
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you are driving your 1800 kg car at 19 m/s over a circular hill that has a radius of 150 m. a deer running across the road causes you to hit the brakes hard while right at the summit of the hill, and you start to skid. the coefficient of kinetic friction between your tires and the road is 0.75.
The The force of friction acting on the car as you apply the brake is 13,230 N and the centripetal force of the car is 4,338 N.
What is the centripetal acceleration of the car?
The centripetal acceleration of the car is calculated as follows;
ac = v²/r
where;
v is the linear speed of the car = 19 m/sr is the radius of the circular path = 150 mac is the centripetal acceleration = ?substitute the given parameters and solve for the centripetal acceleration of the car.
ac = (19²) / (150)
ac = 2.41 m/s²
The force of friction acting on the car as you apply the brake to prevent you from hitting the deer is calculated as follows;
μ = Ff/W
μ = Ff / mg
where;
Ff is the frictional forceW is the weight of the carg is acceleration due to gravityFf = μ (mg)
Ff = 0.75(1800 x 9.8)
Ff = 13,230 N
The centripetal force of the car is calculated as follows;
F = mac
F = 1800 x 2.41
F = 4,338 N
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The complete question is below;
you are driving your 1800 kg car at 19 m/s over a circular hill that has a radius of 150 m. a deer running across the road causes you to hit the brakes hard while right at the summit of the hill, and you start to skid. the coefficient of kinetic friction between your tires and the road is 0.75. Find the force of friction on the car and the centripetal force of the car.
What is the mass of the backpack weighing 175N?
Answer:
It could be a few answers but it you are wanting kg it would be 17.85kg
Explanation:
I hope this helps! If it does would you please mark me brainliest?
1. A marble is dropped from a bridge and strikes the water in 5 seconds. How fast is it traveling when it strikes the water?
The speed of the marble traveling when it strikes the water is equal to 49m/s.
What are equations of motion?The equations of motion are equations that are used to describe the motion of a physical system when its motion is a function of time. The equations of motion can be described as a set of mathematical functions in terms of dynamic variables.
The three equations of motion are:
[tex]v = u+at[/tex]
[tex]S= ut +\frac{1}{2} at^2[/tex]
[tex]v^2= u^2+2aS[/tex]
Given, the time that marble takes to travel from the bridge to the water,
t = 5s
The initial velocity of the marble, u = 0
The acceleration of the marble, a= g = 9.8m/s²
From the equation of motion, calculate the final velocity of the marble:
v = u+at
v = (0) + (9.8) (5)
v = 49m/s
Therefore, the final velocity of the marble with which it hits the water is 49m/s.
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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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84 g of a metal at an initial temperature of 72°c releases 553 j of heat. Calculate the final temperature of the metal if its specific heat capacity is 0. 13 j/g⋅k.
Answer:
Q = 553 J = c M ΔT heat released
ΔT = Q / (c * M)
ΔT = 553 J / (.13 J/g-K * 84 g) = 50.6 K change in temperature
72 - 50.6 = 21.4 deg K final temperature os metal
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
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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What is the smallest particle size a scientist can observe using a scanning probe microscope?
A) millimeter
B) nanometer
C) picometer
D) decimeter
The smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.
What is a unit of measurement?A recognized and accepted standard for measuring other amounts of the same sort is referred to as a unit of measurement. It is predetermined by custom or law.
As given in the problem, we have to find out what is the smallest particle size a scientist can observe using a scanning probe microscope.
1 millimeters = 1 × 10 ⁻³ meter
1 nanometer = 1 × 10⁻⁹ meters
Thus, the smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.
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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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radiation energy from the sun received at earth's poles is _____ that received at the equator, leading to winds that move heat towards the ______.
Radiation energy from the sun received at the earth's poles is less than that received at the equator, leading to winds that move heat towards the poles.
The Radiation energy from the sun is received to a lesser extent on the poles than it is received on the equator. This causes winds that move heat toward the poles. The equator receives the most direct amount of light as compared to the poles because of the angles between the equator and the sun.
The temperature is warmer near the equator whereas as you move toward the poles, the temperature is comparatively cooler because that area gets lesser sunlight. So, the number of sunlight decreases as we go away from the equator
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light from the sun with an intensity of i0i0 passes through two polarizers. initially, the angle between the polarizers is zero and then one polarizer starts to rotate. how does the intensity of the transmitted light change during one full rotation?
The intensity starts at Io/2 , decreases to zero, increases to Io/2, decreases to zero and increases to Io/2 is correct answer.
What is intensity?
In physics, the power transferred per unit area is known as the intensity or flux of radiant energy, where the area is measured on a plane perpendicular to the direction of the energy's propagation. Watts per square metre (W/m2) and kilogrammes per square metre (kg/s3) are the units used in the SI system. With waves like acoustic waves (sound) or electromagnetic waves like light or radio waves, intensity is most usually employed to describe the average power transfer across one period of the wave. Other situations where energy is exchanged can also be described in terms of intensity. One could, for instance, figure out how much kinetic energy each drop of water from a sprinkler is carrying.
The intensity is Io/2 after going through the first polarizer.
At some point, let the angle between the polarizers be.
The intensity is then given as after going through the second polarizer.
I = cos2(Io/2).
Cos2 is 1 at 0°, 180°, and 360° and zero at 90° and 270° because ranges from 0 to 360°. Consequently, the transmitted light's intensity I,
The intensity starts at Io/2 , decreases to zero, increases to Io/2, decreases to zero and increases to Io/2 is correct answer.
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Calculate the horizontal force that must be applied to produce an acceleration of 1.8 m/s2 for a 1.2-kg puck on a horizontal friction-free air table.
The horizontal force to be applied on the puck is 2.16 N
The horizontal force to be applied to a puck of given mass and acceleration on a friction-free table
Given:
A 1.2-kg puck is moved on a horizontal friction-free air table with an acceleration equal to that of 1.8 [tex]m/s^2[/tex]
Using Newton’s second law of motion, a body experiencing a force F gets accelerated in the direction of the force and its magnitude a is proportional to magnitude of the applied force. It also holds an inverse relation with the mass of the body m . This can be expressed as,
[tex]F = Ma[/tex]
Here, mass of the puck is 1.2kg. The acceleration is 1.8 [tex]m/s^2[/tex]
F = 1.2 x 1.8
F = 2.16 N
What is Friction ?Friction is a force that prevents the relative movement of solid surfaces, fluid layers and material elements sliding against each other. There are several types of friction:
Dry friction is a force that opposes the relative lateral movement of two solid surfaces in contact. Dry friction is divided into static friction ("stich") between non-moving surfaces and kinetic friction between moving surfaces. In addition to atomic or molecular friction, dry friction usually arises from the interaction of surface features called turgidities. Fluid friction describes friction between layers of viscous fluid moving relative to each other. Lubricating friction is fluid friction where a lubricating fluid separates two solid surfaces. Skin friction is part of the resistance, the force that prevents the movement of fluid on the surface of the body. Internal friction is a force that prevents movement between the components of a solid material during its deformation.To learn more about friction, visit;
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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 2,800 g piece of metal absorbs 14,014 j of energy as it is heated from 22. 0 °c to 35. 0 °c. What is the specific heat of this metal?.
The specific heat of this metal is 0.385 j/g°C.
What is the specific heat?The Specific heat ability of a substance is the heat potential of a pattern of the substance divided by the mass of the sample, also sometimes called massic heat ability.
The specific warmth ability is defined as the quantity of warmth (J) absorbed consistently with the unit mass (kg) of the cloth whilst its temperature will increase 1 k (or 1 °C), and its gadgets are J/(kg k) or J/(kg °C).
Specific heat is described by the quantity of warmth had to increase the temperature of 1 gram of a substance 1 diploma Celsius (°C). Water has a high precise heat, which means it takes more power to grow the temperature of water compared to different materials.
heat = msΔt
s = heat/mΔt
s = 14,014 / 2,800 × 13
s = 0.385 j/g°C
Hence the specific heat of this metal is = 0.385 j/g°C
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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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