A student rolls a marble on two different surfaces with the same force. The table shows the distance travelled in each trial.


Why does the marble travel a greater distance on glossy paper but not on sandpaper?

a) Because the mass of the marble on sandpaper is high.
b) Because the mass of the marble on glossy paper is high.
c) Because interlocking between the surface of marble and sandpaper is high.
d) Because interlocking between the surface of marble and glossy paper is high.

An equation that relates and represents the distance that the plane flies at this speed for hours is t=d/610.

The plane flew at a constant speed in one hour,

915/1.5=610

we can write it in the form as:

610t=d

Relative Motion depends on your point of view and position change must be in relation to a reference point

Velocity is speed in a given direction. It is calculated by dividing distance by time also. A measurement of velocity must include a direction in the units Example: Todd's speed was 5 m/s but his velocity was 5 m/s East.

When graphing motion, time is on the x-axis and distance on the y-axis. The faster the motion, the steeper the slope of the straight line. Slope is calculated as the rise (distance on the y-axis) divided by run (distance on the x-axis).

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The distance that the plane covers while traveling at this speed for hours is related to and represented by the equation t=[tex]\frac{d}{610}[/tex].

In an hour, the plane maintained a constant speed,

[tex]\frac{915}{1.5}[/tex]=610

We can format it as follows:

610t=d

Your point of view affects relative motion, and any change in position must be in relation to a reference point.

Speed in a specific direction is known as velocity. In order to calculate it, distance and time are also divided. The units of a velocity measurement must contain a direction. Example: Todd's velocity was 5 m/s East while his speed was 5 m/s.

Time is on the x-axis and distance is on the y-axis when graphing motion. The slope of a straight line increases in steepness with increasing speed. The slope calculated as the rise (distance on the y-axis) divided by run (distance on the x-axis).

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The temperature in degree celsius is 37°C.

The temperature values can be converted from one unit to another with the following formula:

                                      F = 1.8C + 32

Rearranging we get,

                                      C = (F - 32)/1.8

Given  the normal temperature for a healthy person is about 98.6 Fahrenheit degrees. i.e. F = 98.6

Putting this value in above equation we get, C = 37°

So, the temperature in degree celsius is 37°C.

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Answer:

Moby

Explanation:

Newton's 2nd Law:  F = ma

a = F/m

Acceleration and mass are inversely proportional.  So if Moby and Tim want to accelerate at the same rate, Moby, with the greater mass, would need more force to accelerate at the same rate as Tim.

The change in kinetic energy for this system is - 11.69 J.

The change in the kinetic energy of the system is calculated by applying the following kinematic equation as shown below.

ΔK.E = K.Ef - K.Ei

where;

The initial kinetic energy of the logs and the frogs is calculated as follows;

K.Ei = ¹/₂ (75)(1.8²)  +   8(¹/₂)(0.3)(1.3²)

K.Ei = 123.53 J

The final kinetic energy of the system depends on the final velocity of the system. The final velocity of the system after the collision is calculated as follows;

m₁u₁ + m₂u₂ = v (m₁ + m₂)

(75 x 1.8) + (8 x 0.3)(-1.3)  = v (75  +  8 x 0.3)

135 - 3.12 = 77.4v

131.88 = 77.4v

v = 131.88 / 77.4

v = 1.7 m/s

K.Ef = ¹/₂(m₁ + m₂)v²

K.Ef = ¹/₂(75 + 0.3x8)( 1.7² )

K.Ef = 111.84 J

The change in kinetic energy = 111.84 J - 123.53 J = - 11.69 J

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Answer: It is a Scalar quantity

Explanation: This is because scalar quantities have magnitude but no direction

'mg=63 N, h=2R' <br> As 'g (h)=(1)/(9)g' and '(g h)/(g)=((R)/(R+h))2= ((R)/(R+R2))= (1/3)2= (1)/(9)' respectively. if it is subject to the earth's gravitational force pull at a height equal to half the planet's radius.

The term gravitational force refers to the force that the earth exerts on a body. Examples of motion caused by gravitational force include the downward motion of water in a river, the downward motion of water in a stream, and the upward motion of a ball when it is thrown.

Why does gravity have energy?

The energy that an item retains due to its height above the Earth (i.e., whether it is farther away from or nearer to the ground) is known as gravitational energy. It represents potential energy. An object has gravitational energy because of its height above the ground.

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Answer: Push of the ball on the earth. The reaction force is equal and opposite to the action force, according to Newton's Third Law of Motion.

Explanation: In other words, when the earth pulls the ball downward with a force, the ball pushes back on the earth with an equal and opposite force. This occurs because forces are always pairs of equal and opposite forces, known as action-reaction forces. The action force is the force that initiates the interaction, while the reaction force is the force that responds to the action force. In this case, the action force is the pull of the earth on the ball, while the reaction force is the push of the ball on the earth.

Concave mirrors form both real and virtual images.

A concave mirror has an inward-curving reflective surface that faces away from the light source. Light is reflected inward by concave mirrors to a single focus point. Unlike convex mirrors, a concave mirror's created image exhibits a variety of picture types based on the object's distance from the mirror.

A virtual, magnified image of the object is produced when the concave mirror is placed very close to it. As the distance between the object and the mirror increases, the size of the image decreases and real images are produced.

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A vehicle undergoes acceleration when it: all of the above. So the correct option is D.

Acceleration is a process in which the speed changes, in which it increases. It can be accelerated by changing speed or by changing direction. Even if it is moving in a constant way, acceleration is not taking place unless the speed and direction are increased, decreased, or changed, respectively.

The acceleration is then given by two combined causes: the net balance of the external forces acting on the object and the mass of that object.

Therefore, we can confirm that the correct option is D. all of the above.

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When a heavy boy and a light girl are balanced on a massless seesaw and f they both move forward so that they are one-half their original distance from the pivot point, then : nothing will happen and seesaw will still be balanced.

The principle of moment states that the sum of clockwise moment is equal to the sum of anticlockwise moment.

F₁r₁ = F₂r₂

where; F₁ and F₂ are the forces applied by the boy and the girl respectively

r₁ and r₂ are the position of the boy and the girl respectively

We can conclude that if the boy and the girl were initially at equilibrium, and so, when they move equal distance apart, see-saw will still be balanced. Hence, nothing will happen; seesaw will still be balanced.

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The parallel component of the surface force is the component of the surface force that acts in the same direction as the surface it is applied to.

Parallel components are multiple components that are electrically connected together in parallel. This type of electrical connection allows for increased current flow as the voltage remains the same. Parallel components also allow for the connection of multiple devices to a single power source. This type of electrical connection is often seen in batteries, where multiple cells are connected together to increase the total capacity of the battery. Parallel components are also used in many electronic circuits, such as power amplifiers and digital circuits, to increase their current capacity and allow for more device connections.

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The magnitude of the splitting for the ion is 97 kJ/mol.

We know that the ligands as we know than can be able to act as point charges and as such they are able to lead to the splitting of the octahedral crystal field and then this would result in the formation of the complex

We know that there is one unpaired electron that is present in the Ti III ion and thus we would have;

Δo = hcv

Δo = crystal feild splitting energy

h = Plank's constant

c = speed of light

v = wave number

Then;

Δo = 6.6 * 10^-34 * 3 * 10^10 * 20300

Δo = 4 * 10^-19 J * 6.02 * 10^23/mol

= 242 kJ/mol

CFSE = -0.4 *  242 kJ/mol

= 97 kJ/mol

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A proton can be placed at rest in a stable force field of a magnetic field. The correct answer is a.

A proton can be placed at rest in a magnetic field, but not in an electric field. This is because a magnetic field exerts a force on charged particles that is perpendicular to the direction of motion, whereas an electric field exerts a force on charged particles that is parallel to the direction of motion.

Since a proton is a positively charged particle, it will experience a force in the opposite direction to the electric field, causing it to accelerate rather than come to a rest. A proton will experience a force perpendicular to the direction of motion in a magnetic field which is opposite to the direction of the field, this will cause the proton to move in a circular path, which can be stable, so proton can be placed at rest in a magnetic field.

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To solve this we must be knowing each and every concept related to work and its calculation.  Therefore, 63.428KJ is the work done by jack in carrying Jill up the hill.

Work definition in Physics is "Energy transfer that happens when an item is moved across a distance with an outside force, at least portion of which is applied along the direction of the displacement".

Mathematically, the formula for work can be calculated as

Work = force × displacement

The values that are given are:

force=971.34 -752.72

       =218.62N

displacement=290.13 m

substituting all the given values in the above equation, we get

Work = 218.62N× 290.13 m

On calculation, we get

Work =63,428.2J=63.428KJ

Therefore, 63.428KJ is the work done by jack in carrying Jill up the hill.

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A concave mirror is also known as converging mirror because it converges the incident rays parallel to the principal axis to the focus of the mirror after reflection.

A concave mirror has an inward-curving reflective surface that faces away from the light source. Light is reflected inward by concave mirrors to a single focus point. Unlike convex mirrors, a concave mirror's image forms a variety of images based on the object's proximity to the mirror.

A spherical mirror that has had its reflecting surface dented inward is referred to as a concave mirror. The focal point is where concave mirrors reflect and concentrate entering light beams (which are parallel). There are various types of pictures that can be created depending on how close an object is to the reflecting surface.

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The encounter hypothesis was one of the earliest explanations for how planets formed. According to this hypothesis, the Sun was just passed by a renegade star roughly 5 billion years ago.

Planetesimals are the name for these objects. They originate as tiny pieces of solar dust and chondrules that adhere to one another through weak electrostatic forces and gravitational instability.

Georges-Louis Leclerc, a French mathematician, proposed the theory that the planets formed when a comet collided with the Sun and sent massive amounts of material hurling away in the middle of the eighteenth century. He claimed that gravity gradually gathered this stuff to create orbiting worlds.

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One of the earliest theories about how planets formed was the encounter theory. This theory states that the Sun was just passed by a rogue star about 5 billion years ago with high gravity.

These objects are referred to as planetesimals. They begin as minute chondrules and solar dust particles that cling to one another due to weak electrostatic forces and gravity instability. In the middle of the seventeenth century, a French mathematician named Georges-Louis Leclerc put forth the notion that the planets were created when a comet impacted with the Sun and ejected enormous amounts of material into space. He asserted that this material was slowly gathered by gravity to form orbiting worlds.

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In chemical reactions , by gaining one electron the valence configuration of bromine tend to change.

The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of components or substructure, electrons, which are part of the lepton particle family's first generation, are typically regarded to be elementary particles.

There are 7 valence electrons in it. To achieve noble gas configuration, only one additional electron is needed. It will then be known as a bromide ion after receiving one additional electron. In order to create an ion, bromine gains one electron.

Thus, In chemical reactions , by gaining one electron the valence configuration of bromine tend to change.

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Answer:

3.0210

Explanation:

I Don't Know

if a receptor's receptive field is small, it allows for greater specificity of localization.

In biochemistry and pharmacology, a receptor is a molecule of protein that receives chemical signals from outside the cell. When these chemical signals bind to receptors, some form of cellular response occurs, such as changes in the electrical activity of the cell. Receptors are located in the cell membrane, cytoplasm, and nucleus. The signaling molecule attached to a receptor is called a ligand, which can be a peptide or another small molecule such as a neurotransmitter, hormone, drug, or toxin.

Receptors can be classified based on their location. Transmembrane receptors include ion channel-linked receptors (ionotropic receptors), G protein-linked receptors (metabotropic), and receptor tyrosine kinases.[1] Intracellular receptors are found inside the cell (in the cytosol or in the cell nucleus).[1] Molecules that bind naturally to a particular receptor are known as endogenous ligands. For example, the endogenous ligand for the acetylcholine receptor is acetylcholine.

Each receptor is linked by a specific cellular biochemical pathway. Many receptors are found in most cells, and each receptor binds only with a specific structural ligand, much like a lock that accepts a specially shaped key. When a ligand binds to its receptor, it activates a biochemical pathway associated with the receptor.

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Answer:

A,D,B

Explanation:

I think that because the temperature near the equator is higher than other ones so currents close to the equator like A, D and B are most likely to be warm currents

(a) The time taken for the bicyclist to catch her friend is 3.3 seconds.

(b) The distance travelled by the bicyclist is 11.98 m.

(c) The speed of the bicyclist when she catches up with her friend is 7.26 m/s.

The time taken for the bicyclist to catch her friend is calculated by applying the principle of relative velocity.

The distance between the bicyclist and her friend 2 seconds later = 4.5 m/s x 2 s = 9 m

( Vc - Vf ) t = d

where;

( at - Vf ) t = d

( 2.2t - 4.5 ) t = 9

2.2t² - 4.5t = 9

2.2t² - 4.5t - 9 = 0

solve the above quadratic equation using formula method.

t = 3.3 seconds

The distance travelled by the cyclist is calculated as follows;

D = ¹/₂at²

D  = ¹/₂ ( 2.2) (3.3²)

D = 11.98 m

The speed of the bicyclist when she catches up with her friend is calculated as;

v = at

v = ( 2.2 ) x 3.3

v = 7.26 m/s

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Mrs. Allen came from work to home at speed  90 km/h.

Speed is defined as the ratio of distance to the amount of time it took to cover that distance. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Mrs. Allen travels from home to work at 60 km/h.

The average speed was 72 kmph = 72 km/h

Let the distance between the home to work is x.

Hence, her speed during come from work to home = x /(2x/72- x/60)km/h

=  1/(2/72- 1/60) km/h

= 90 km/h.

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The magnitude of the torque on the tip of the catheter containing this permanent magnet is 4.20 x 10-3 Nm and  the potential energy of the system is -0.0104 J.

Given that the magnetic field (B)  = 0.080 T.

The permanent magnet has a magnetic moment of (μ) = 0.14 Am^2.

The angle of orientation of the permanent magnet is (θ) = 22°

(a) Let the magnitude of the torque = τ

We know that τ = μBsinθ  such that

τ = 0.14 x 0.080 x sin22°  = 4.20 x 10-3 Nm

The require torque on the tip of the catheter containing this permanent magnet is 4.20 x 10-3Nm

(b) Let the potential energy of the system be U

We know that U =  -μBcosθ

U = -(0.14 x 0.080 x cos22°) = -0.0104 J

Hence the potential energy of the system consisting of the permanent magnet in the catheter and the magnetic field provided by the external magnets is -0.0104J.

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complete question: A typical magnitude of the external magnetic field in a cardiac catheter ablation procedure using remote magnetic navigation is B = 0.080 T. Suppose that the permanent magnet in the catheter used in the procedure is inside the left atrium of the heart and subject to this external magnetic field. The permanent magnet has a magnetic moment of 0.14 Am^2. The orientation of the permanent magnet is 22° from the direction of the external magnetic field lines.

(a) What is the magnitude of the torque on the tip of the catheter containing this permanent magnet?

(b) What is the potential energy of the system consisting of the permanent magnet in the catheter and the magnetic field provided by the external magnets?

The permanent magnet-containing catheter's tip experienced a torque of 4.20 x 10-3 Nm, and the system's potential energy was -0.0104 J.

Installing a turbocharger or supercharger is a practical alteration that will greatly boost torque. Your engine's power is increased via forced induction, which forces air into the engine. The amount of time a turbocharger has to spool before it benefits torque will depend on the torque curve you choose.

In light of the magnetic field's (B) value of 0.080 T.

The magnetic moment of the permanent magnet is () = 0.14 Am2.

The permanent magnet's orientation angle is () = 22°.

(a) Set the torque's magnitude to.

We are aware that = Bsin, thus

4.20 x 10-3 Nm is equal to = 0.14 x 0.080 x sin22°.

4.20 x 10-3Nm of required torque must be applied to the catheter tip housing this permanent magnet.

(b) Set the system's potential energy to U.

We are aware that U = -Bcos.

U is equal to -(0.14 x 0.080 x cos22°) = -0.0104 J.

In light of this, the potential energy of the system comprised of the catheter's permanent magnet and the magnetic field created by the external magnets is equal to -0.0104J.

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The time it took John Harrison to complete his work on the marine chronometer was 7 years.

Harrison, a self-taught carpenter, and amateur watchmaker accepted the challenge and found a solution. After seven years of hard work, he created his first marine chronometer in 1735 and the first in the world.

Harrison's theory was that instead of traveling based solely on the positions of the stars, one could navigate longitudes by knowing the time. Harrison argued that this distance could be used to calculate longitude by keeping standard time at sea and comparing it to time anywhere in the world.

To achieve this theory, Harrison set to work in 1727 to develop a clock that "remained accurate when tossed and turned on the high seas". Having established himself as a reliable watchmaker, the inventor spent the next seven years developing an all-wood watch called the H1 watch.

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The net force acting on the box is  20 N.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. A spring balance can be used to calculate the Force.

The  boy pushes a box from West to East with a force of 25 N.

The wind exerts a force of 5 N South on the box.

As these two forces acting in opposite direction, the net force acting on the box = 25 N - 5N = 20 N.

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Explanation:

Gravitational and elastic potential energy are both forms of mechanical energy, which is the sum of kinetic energy (the energy of motion) and potential energy (the energy of position or configuration).

Both gravitational and elastic potential energy are stored energy that can be converted into kinetic energy. For example, when a ball is held at a height above the ground, it possesses gravitational potential energy due to its position above the ground. If the ball is then released, it will fall to the ground and its potential energy will be converted into kinetic energy as it gains speed. Similarly, when a spring is compressed or stretched, it possesses elastic potential energy due to the work done to compress or stretch it. If the spring is then released, it will return to its original shape and its potential energy will be converted into kinetic energy as it moves.

Both gravitational and elastic potential energy depend on the mass of the object and the distance it is from a reference point. The greater the mass of the object and the farther it is from the reference point, the more potential energy it has.

Both gravitational and elastic potential energy are measured in joules (J) in the International System of Units (SI).

Answer:  1350 m/s

Explanation:

The equation for the speed of a wave: Speed = Wavelength x Frequency

The coin sinks in water due to a concept known as density. Because pennies are denser than water, they sink.

A sink is a bowl-shaped plumbing fixture used for hand washing, dishwashing, and other tasks. Sinks have a tap (faucet) that provides hot and cold water, as well as a spray feature for faster rinsing. They also have a drain to remove used water, which may have a strainer and/or a shut-off device, as well as an overflow prevention device. Sinks may also include a soap dispenser. Many sinks are installed next to or inside a counter, especially in kitchens.

When a sink becomes clogged, most people will use a chemical drain cleaner or a plunger to remove the clog, but most professional plumbers will use a drain auger (also known as a "plumber's snake") to remove the clog.

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The speed of the ball before the skater caught it was 5 m/s.

Momentum is conserved in this situation, so the total momentum before the skater caught the ball must be equal to the total momentum after the skater caught the ball.

We can solve for the initial speed of the ball by using the equation for momentum, which is:

mv = p

Where m is the mass and v is the velocity.

Before the skater caught the ball, the mass and velocity of the ball were 5 kg and 0 m/s respectively. The total momentum was therefore 0 kg m/s.

After the skater caught the ball, the mass and velocity of the skater and ball were 50 kg and 0.5 m/s respectively. The total momentum was therefore 25 kg m/s.

We can solve for the initial velocity of the ball by setting the momentum before and after equal to each other and solving for v:

0 = (5kg)(v) + (50kg)(0.5 m/s)

v = -5 m/s

Therefore, the speed of the ball before the skater caught it was 5 m.

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