Which statement is true? (2 points)
Gravity is the force of attraction between two objects with mass and is dependent on the distance between these objects.
Gravity is the force that repels two objects that have opposite charges. It is dependent upon the charges of the objects.
Gravity is a force that keeps objects moving in space. The less the object weighs, the further out in space gravity will pull the object.
Gravity is the force of resistance to a change in position. The greater the distance between two objects, the greater this force will be.
The first choice is the true statement.
Gravity is the force of attraction between any two objects with mass. Its strength depends on the size of both masses and the distance between them.
Gravity is the force of attraction between two objects with mass and is dependent on the distance between these objects. therefore the correct answer is option A
What is gravity?It can be described as the force that causes a body to pull another body toward its center as a result of their mutual gravitational pull. The gravitational pull of a body varies depending on its mass and size; for instance, the moon has a gravitational pull that is 1/6th that of the earth.
The mass of any object is constant throughout and it is measured in kilograms while the weight of any object can vary depending on the value of gravity
The mass of any object is constant throughout and it is measured in kilograms while the weight of any object can vary depending on the value of gravity
The gravitational pull between two mass-containing objects depends on their separation from one another as well as their mass. Therefore, option A is the appropriate response.
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the graph represent the relationship between the work done by a 40.8kg students running up a flight of 10 steps and time . each step is 0.50m high.calculate the valie of the slope at point z of the graph above and identify what this value represent .
Since the graph is a straight line so the slope will remain same at all points
So here slope is given as
[tex]slope = \frac{dy}{dx} = \frac{1000 - 0}{4 - 0}[/tex]
[tex]slope = 250[/tex]
Now here we can say that slope will represent the rate of change in the physical quantity on Y axis with respect to the quantity on X axis
So here we will have
[tex]Slope = \frac{dW}{dt}[/tex]
so it is rate of work done
So slope of this graph will same as power of the object
CAN SOMEONE PLEASE HELP ME WITH MY PHYSICS QUESTIONS? I NEED CORRECT ANSWERS ONLY
Consider a situation where you are playing air hockey with a friend. The table shoots small streams of air upward to keep the puck afloat and to minimize friction. When you barely tap the puck forward, it
A. slows and stops.
B. moves with a constant speed until hitting the other end.
C. moves backward with an equal and opposite velocity.
D. continues to accelerate.
Friction between two flat surfaces can be divided into two categories. What are the two most common kinds of friction?
Air resistance
Fluid
Static
Kinetic
When a wire within a closed circuit is coiled upon a nail, the nail will _______.
not possess electrical properties
Possess magnetic properties
Will not pass a current through it
Will spark
when wire is coiled upon a nail then it will posses magnetic characteristics
This is due to the coiled shape it will behave like a solenoid and the magnetic field of solenoid is given as
[tex]B = \mu_o ni[/tex]
so here when wire is coiled up on a nail then due to the magnetic field of the coil the nail will attain magnetic characteristic.
so correct answer will be
Possess magnetic properties
Answer:
will spark
Explanation:
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What is the direction of magnetic field lines inside any magnet?
A.) they travel from north to south
B.) they travel from south to north
C.) they travel in a loop
D.) they travel back and forth within the magnet
E.) They do not travel through the magnet
Answer: Option B.) they travel from south to north
Inside the magnet, the field lines travel from South to North.
Explanation:
A magnet has two poles: North and South. The magnetic field lines originate from North and end at south pole. Maximum field lines are at the poles. Inside the magnet, the field lines travel from South pole to North pole. Overall, the field lines form a loop.
Answer:
B
Explanation:
100%
When a liquid changes into a solid the phase change is called
Scientists use something called a freezing point or melting point to measure the temperature at which a liquid turns into a solid.
Hope this helps have a nice day
Correct me if im wrong
Freezing is the name given to a phase change from liquid to solid. It happens at a freezing point specific to each substrate.
Which statement best describes the mass of gold and iron atoms based on their respective specific heat values?
Choices:
Gold atoms are heavier than iron atoms.
Iron atoms are heavier than gold atoms.
Gold atoms have the same mass as iron atoms.
Proof of answer for edge :)
Answer:
Gold atoms are heavier than iron atoms.
Explanation:
[30 POINTS] An automobile steering wheel is shown. The ideal mechanical advantage of this wheel and axle = _____ .
Rw/Ra = MA
18cm/2cm= MA
MA = 9
This means that Fi is 1/9 of the force applied to the axil. The distance travelled by Rw is 9 times more than Ri is that you move 9 times more when turning the wheel using Rw.
Put more simply
Rw/Ra = Fa/Fw
Rw = Radius of the wheelRa = Radius of the axilFa = Force delivered on the axilFw = Force delivered by the wheelThe buoyant force on an object in a fluid is equal to the weight of the _____. fluid in the container fluid surrounding the object fluid displaced by the object
Answer:
The buoyant force on an object in a fluid is equal to the weight of the DISPLACED. fluid in the container fluid surrounding the object fluid displaced by the object
Explanation:
As we know that buoyancy force is given by
[tex]F_b = \rho V g[/tex]
here we know that
[tex]\rho[/tex] = density of fluid
V = volume submerged in the fluid
so here we will say that the buoyancy force is the force exerted by liquid equal to weight of the liquid displaced by the object
Describe the relationship between force, Mass, and acceleration
Answer
Relation between Force, mass and acceleration
F = m.a Newtons ---------- From Newtons II law of motion
This means an object with larger mass needs a stronger force to be moved along the same acceleration as an object with small forcewhich statement most accurately compares earth crust and earth mantle
Answer:
Earth crust is thinner and less dense than the mantle.A bullet is fired at 660m/s and strikes a target 200.0 meters away. What is the time of the bullet’s flight?
Given data
Velocity of bullet (v) = 660 m/s,
target distance (d) = 200 m ,
time of bullet's flight (t) = (distance traveled) ÷ (velocity of bullet)
= 200 ÷ 660
= 0.30 sec.
Time of bullet's flight is 0.30 seconds.
Explain why a rapidly spinning gyroscope, mounted in a frame that allows it to rotate in any direction independently of the frame’s rotation, tends to maintain its axis pointed in the same direction in space.
A spinning gyroscope maintains its orientation due to the conservation of angular momentum and the phenomenon of gyroscopic precession. External torques lead to precession around a vertical axis, allowing the gyroscope to resist changes to its orientation, similar to Earth's stable rotation.
Understanding the Gyroscope's Stability
A rapidly spinning gyroscope mounted in a frame behaves in a manner that tends to keep its axis pointing in the same direction in space. This occurs due to the principles of conservation of angular momentum. When a gyroscope is spinning, it has a significant amount of angular momentum, which is a vector quantity that tends to resist changes in the orientation of the rotation axis.
The phenomenon that explains this steady orientation is known as gyroscopic precession. When an external torque tries to change the direction of the gyroscope's axis, the generated torque is perpendicular to the angular momentum. This causes the gyroscope to precess around a vertical axis rather than topple over. An example of this can be observed when a spinning top is tilted; rather than falling, it precesses due to the torque on the center of mass changing the angular momentum direction.
Earth itself is likened to a massive gyroscope, with its angular momentum along its axis pointing towards Polaris, the North Star. This parallelism between the gyroscope's behavior and Earth's rotation provides an intuitive understanding of the gyroscope's stability.
Landon's new toy arrived in the mail covered in foam packing peanuts. The foam packing peanuts have a mass of 30 g and a volume of 60 cm3. What is the density? 2 g/cm3
180 g/cm
3 0.5 g/cm
3 2
The formula for calculating density is P=M/V where P is the density, M is the mass, and V is the volume.
The problem gives you the mass, 30g, and the volume, 60cm^3;you can plug those into the equation, which should give you P=30/60.
Your answer should end up being P=0.5 g/cm^3.
WORK:
P=M/V
P=30g/60cm^3
P=0.5g/cm^3
Answer:
p=0.5 g/cm3 C is the answer
what the hell does "Give an example of a situation in your life in which you depend on testing and evaluation in a product design to keep you safe." even mean?
A 50 Kg box sits at rest on a 30 degree ramp where the coef of static friction is 0.5773. How hard would you have to push horizontally to get the box to start to move up the ramp?
Given data
m = 50 Kg
Weight(W) = 50×9.81 = 490.5 N
Coefficient of friction (μs) = 0.5773
Angle of ramp = 30 degrees
Determine the horizontal push (P) = ?
P cos Θ = W sin Θ + μs P sin Θ + μs W cos Θ
P (cos Θ -μs sin Θ ) = W ( sin Θ + μs cos Θ)
P = W ( sin Θ + μs cos Θ)/ (cos Θ -μs sin Θ )
P= 841.58 N
Harizontal push is required = 841.58
Gases are absorbed more easily in hot water.
true or false
False gases are easily dissolved in cold water
Answer: The given statement is false.
Explanation:
Relation between kinetic energy and temperature is as follows.
[tex]K.E \propto \frac{3}{2}kT[/tex]
As, kinetic energy is directly proportional to temperature. So, when there will be increase in temperature then there will also occur increase in kinetic energy of the particles of a substance.
At high temperature, gases are desorbed, that is, they readily escape into the atmosphere.
Therefore, when gas particles move more slowly then it means kinetic energy of gas particles is very low. It also implies that temperature is low.
Hence, at low temperature only gases are absorbed.
Thus, we can conclude that the statement gases are absorbed more easily in hot water, is false.
A force of 200N acts on a surface of area 10cm2 normally calculate the pressure exerted on the surface
The SI unit of pressure is the pascal (Pa). It is a derived unit equal to 1 newton per square meter (1 N/m²).
Your pressure is ...
... (200 N)/(10 cm²) × (100 cm/m)² = 200,000 Pa
A horizontal force of 90.0 N is required to push a 75.0 kg along a horizontal surface at a constant speed. What is the magnitude of the force of friction (90.0N)
== You're pushing the load straight along the horizontal surface at a constant speed.
== The speed and direction of the load are not changing, so there is no acceleration.
== From Newton's 2nd law of motion, we know that F = m A . Since A=0, F must also be zero. That means NO NET FORCE is acting on the load.
== But how can that be ? You're pushing it with 90 N !
== The NET force is zero. So something else must be pushing the box, also with 90 N of force, exactly opposite to YOUR force, and they add up to zero.
== THERE's your force of friction !
In this case, the force of friction is 90.0 N. This is inferred from the fact that the object is moving at a constant speed, implying that the force applied is countered by an equal force of friction. This is an application of Newton's first law of motion.
Explanation:The force of friction can be determined by using the basic principles of physics. In the scenario presented, the box is being moved at a constant speed, which implies that the force of friction is equal to the force applied, 90.0 N. This is because when an object moves at a constant speed, it suggests there is a balance of forces meaning the force you're applying (90.0 N in this case) is battling against an equal force in the opposite direction, this opposing force being the force of friction.
This applies the principles of Newton's first law - an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This equilibrium of forces is what's keeping the box moving at a constant speed.
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An object which has a mass 70 kg is sitting on a cliff 10 m high . Calculate the objects gravitational potential energy given G=10m/s2
In physics, potential energy is calculated as ‘mass × acceleration due to gravity × height’
So,
P.E. = 70 kg × 10 m/s² × 10 m
P.E. = 7000 Joules
Answer: 7000 joules
Explanation: The potential energy is the energy "stored" by the object.
For objects that are lifted in the y-axis, the potential energy can be calculated as:
U = g*h*m
where g is the gravity's acceleration, h is the height and m is the mass of the object.
Here, g = 10m/s^2, m=70kg and h = 10m
U = 10m/s^2*70kg*10m = 7000 (m/s)^2*kg = 7000 joules
Displacement of an object is ____ to the force.
Fill in the blanks.
Answer: inversely proportional to
The work relates the displacement and Force
W = F. d Joules
Where W= work,
F = Force ,
d = displacement of object
From the above equation
force and displacement are inversely proportional and work and force are directly proportional
The magnitude of the centripetal force acting on an object traveling in a horizontal circular path will decrease and if the
Answer:
The radius of the path is increased
Explanation:
The centripetal force is represented by the equation:
[tex]F=\frac{mv^2}{r}[/tex]
where [tex]F[/tex] is the centripetal force, [tex]m[/tex] is the mass of the object on the circular path, [tex]v[/tex] is its velocity and [tex]r[/tex] the radius of the circle
From the equation we can observe that the centripetal force and the radius of the circular path are inversely proportional: if the radius increases the force decreases, and if the radius decreases the force increases.
Thus, the complete sentence is:
The magnitude of the centripetal force acting on an object traveling in a horizontal circular path will decrease and if the radius of the path is increased
The magnitude of centripetal force will decrease if the radius of the circular path increases, as the force is inversely proportional to the radius of curvature while being directly proportional to the square of the velocity and the mass of the rotating body.
Explanation:The magnitude of the centripetal force acting on an object traveling in a horizontal circular path is influenced by several factors, including the mass of the object, its velocity, and the radius of the path. Newton's second law implies that the centripetal force, which is always directed towards the center of rotation, is essential in maintaining circular motion. If we use the formula Fc = mv2/r, where Fc is the centripetal force, m is the mass, v is the velocity, and r is the radius, it is clear that the centripetal force is directly proportional to both the mass and the square of the velocity, but inversely proportional to the radius.
Therefore, an increase in the radius of the circular path would result in a decrease in the centripetal acceleration and thus, a decrease in the centripetal force, as centripetal acceleration (ac = v2/r) is directly proportional to the square of the object's velocity and inversely proportional to the radius of curvature (r).
Newton’s first law of motion is sometimes described as _____. the net force law the law of inertia the law of gravity F = ma
Newton's First Law expresses that a question will stay very still or in uniform movement in a straight line except if followed up on by an outer power. It might be viewed as an announcement about latency, that articles will stay in their condition of movement except if a power demonstrations to change the movement.
Hope this helps. ^_^
Answer:
The correct answer option is: the law of inertia.
Explanation:
Newton’s first law of motion is sometimes described as the law of inertia.
According to the first law of Newton, an object will remain at rest or in uniform motion in a straight line until and unless an external force is applied on it.
This law is also referred to as the law of inertia since the object tries to remain in its present or existing state of motion, showing resistance to bring change in its state.
you add 8950 J of heat to 174 g of iron. What is the temperature of the iron (c=452 J/(kj * C degrees))?
The following forces act on an object: 10 N north, 7 N south, and 4 N east. What is the magnitude of the net force?
Given data;
Fn = 10 N
Fs = 7 N
Fe = 4 N
force in X direction (Fx) = 4 N
force in Y direction (Fy) = 10-7 = 3 N
Net force (Fnet) = Sq.root[(Fx)² + (Fy)²]
= Sq root [ 4² + 3² ]
= 25 N
Net force acting = 25 N
The net force acting on an object with a 10 N force northwards, a 7 N force southwards, and a 4 N force eastwards is 5 N. The net force is calculated by using forces as sides in the Pythagorean theorem.
Explanation:The question refers to determining the net force on an object due to multiple forces acting in different directions. First, we need to subtract the forces that act against each other. A force of 10 N north is countered by a force of 7 N south, leaving us with a net force of 3 N northwards. There is also a force of 4 N to the east.
Then, we employ the Pythagorean theorem to calculate the total net force. Consider these forces as sides of a right angle triangle, with 3 N as one side and 4 N as another. Therefore, F_net = sqrt((3^2) + (4^2)) = 5 N.
So, the magnitude of the net force acting on the object is 5 N.
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Which of the following scientists won a noble prize of pioneering work in the study of the evolution of stars?
Subramanyan Chandrasekhar and William Alfred Fowler won a noble prize of pioneering work in the study of the evolution of stars.
The prize was divided equally between both scientists in 1983.
Subrahmanyan Chandrasekhar and William Alfred Fowler won a noble prize for pioneering work in the study of the evolution of stars.
What did Subrahmanyan Chandrasekhar win the Nobel Prize in 1983 for?The 1983 Nobel Prize in Physics was awarded to Subrahmanyan Chandrasekhar (University of Chicago) and William A for "Theoretical Study of Physical Processes Related to Star Structure and Evolution".
Optical Fiber Pioneer, Semiconductor Wins Nobel Prize in Physics The Nobel Prize in Physics is presented to Charles K. Kao, Willard S. Boyle and George E. Smith did the work for fiber optics and semiconductors.
Subrahmanyan Chandrasekhar was an astrophysicist. He discovered that giant stars can collapse under their own gravity and reach huge or even infinite densities. Today we call these collapsed stars neutron stars and black holes.
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Complete the steps for converting 3.6 gallons per minute to milliliters per second. (1 gallon = 3.79 liters and 1 liter = 1,000 milliliters)
Given that,
Capacity = 3.6 gallons per minutes
Convert it into milliliters per seconds
Since, 1 gallon = 3.79 liters
1 liters = 1000 milliliters
Capacity= (3.6*3.79*1000)/(60)
Capacity = 227.4 milliliters per second.
3.6 gallons per minute is equivalent to a flow rate of 227.4 milliliters per second.
Here are the steps to convert 3.6 gallons per minute to milliliters per second:
Convert gallons to liters: 3.6 gallons * 3.79 liters/gallon = 13.644 liters per minute.
Convert minutes to seconds: Since there are 60 seconds in a minute, divide 13.644 liters by 60 to get the flow rate in liters per second: 13.644 liters / 60 seconds = 0.2274 liters per second.
Convert liters to milliliters: Since there are 1,000 milliliters in a liter, multiply 0.2274 liters by 1,000 to get the flow rate in milliliters per second: 0.2274 liters * 1,000 milliliters/liter = 227.4 milliliters per second.
Therefore, 3.6 gallons per minute is equivalent to 227.4 milliliters per second.
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A little help please?
Dora rolled a marble down a ramp and recorded the potential energy and kinetic energy of the marble at different positions on the ramp, as shown in the table.
(Look at Picture)
Which is the constant variable in this experiment?
A. Mass of marble
B. Kinetic energy of marble
C. Potential energy of marble
D. Height of marble from ground
Mass of marble is the constant variable in this experiment. Hence, option (C) is correct.
What is control variable?A control variable, also known as a scientific constant, is an experimental component that remains constant (controlled) and unaltered over the course of a research.
If control variables were not maintained constant throughout the experiment to examine the relative relationship between the dependent variable (DV) and independent variable(IV), the outcomes of the experiment could be significantly impacted . The experimenter is not very interested in the control variables themselves.
In this experiment, Mass of marble remains constant. So, Potential energy of marble is the constant variable in this experiment. Hence, option(C) is correct.
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how would you present weight change if earth had twice the mass that it does now
It would double. g = GM/r^2 where G is the gravitational constant, M is the mass of the Earth, and r is the radius of the Earth. So, if the Earth's mass doubled, g would double, therefore, so would your weight