Suppose you increase your walking speed from 5 m/s to 15 m/s in a period of 1 s. What is your acceleration?

Exact answer is 69,912 km

Answer:

The magnitude is [tex]2000N[/tex]

Explanation:

To solve this question we are going to use the second Newton law.

The second Newton law states that the acceleration of an object is directly proportional to the net force which acts on the object and inverse proportional to the mass of the object ⇒

[tex]a=\frac{F}{m}[/tex]

Which can also be written as :

[tex]F=m.a[/tex] (I)

Where F is the force

Where m is the mass of the object and where ''a'' is the acceleration.

In the problem, we know that

[tex]m=1000kg[/tex]

[tex]a=2\frac{m}{s^{2}}[/tex]

If we replace in the equation (I) :

[tex]F=(1000kg).(2\frac{m}{s^{2}})=2000(kg.\frac{m}{s^{2}})[/tex]

The unit [tex]kg.\frac{m}{s^{2}}[/tex] is defined as N which is called Newton. N is an unit of force.

Finally, the net force exerted on the car is [tex]2000N[/tex]

Platelet is not a macro-molecule.

There are four major macro-molecules in living organisms which include; proteins, carbohydrates, lipids, and nucleic acids.

There exist four major macro-molecules in living organisms.

They include; Nucleic acids, proteins, carbohydrates, and lipids.

Keywords: Macro-molecules, nucleic acids, proteins, carbohydrates, lipids

Level: High school  

Subject: Biology  

Topic: Macro-molecules

Out of the options given, Platelet is not a macromolecule. Macromolecules are large complex molecules like proteins, carbohydrates, and lipids. Platelets are blood cells that help in clot formation.

Out of the options given A. Carbohydrate, B. Protein, C. Platelet, and D. Lipid, C. Platelet is not a macromolecule. Macromolecules are large complex molecules such as proteins, carbohydrates, lipids, and nucleic acids that are essential for life. They are composed of smaller units bonded together. Platelets on the other hand, are tiny blood cells that help your body form clots to stop bleeding. Therefore, they do not fall under the classification of macromolecules.

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Answer:

the earth the earth pulls the moon tuords it the earth has more mass and the reason why the moon does not just crash into the moon is

300,000 kilo

your welcome

The magnitude of frictional force exerted on the mug is [tex]\fbox{\begin\\\left( {2.865} \right)m\end{minispace}}[/tex] and the coefficient of static friction is [tex]\fbox{\begin\\0.31\end{minispace}}[/tex].

Further explanation:

The opposition that every object feels when it moves is known as the frictional force. This is an opposing force. It always acts in the opposite direction of the motion of the object.

Given:

The angle of inclination of plane is [tex]{17^ \circ }[/tex].  

The acceleration due to gravity is [tex]9.8\,{\text{m/}}{{\text{s}}^{\text{2}}}[/tex].

Concept used:

The frictional force is defined as the opposition of motion of any object or body.  It is also defined as the product of coefficient of friction to the normal force exerted on the body.

The expression for the net force exerted on the mug is given as.

[tex]{F_{{\text{net}}}} = mg\sin \theta[/tex]                                                                         …… (1)

Here, m is the mass of the mug, g is the acceleration due to gravity and [tex]\theta[/tex]  is the inclination angle.

The force that keeps the body at rest is known as the static friction force. It also acts in the opposite direction of motion of body.

The expression for the static frictional force is given as.

[tex]{F_s} = {\mu _s}N[/tex]                                                              ..…. (2)

Here, [tex]{\mu _s}[/tex] is the coefficient of static frictional force and N is the normal force exerted on the body.

When mug is placed on the inclined plane the static frictional force is equal to the frictional force. The vertical component of weight is balanced by the normal reaction of the mug.

The expression for the normal force is given as.

[tex]N - mg\cos \theta=0[/tex]

Rearrange the above expression.

[tex]N = mg\cos \theta[/tex]

Substitute [tex]mg\cos \theta[/tex]  for N in equation (2).

[tex]{F_s}={\mu _s}\left( {mg\cos \theta } \right)[/tex]

Here static frictional force is same as the frictional force exerted on the mug.

Substitute [tex]mg\sin \theta[/tex] for [tex]{F_s}[/tex] in above expression and rearrange it.

[tex]{\mu _s} = \dfrac{{\left( {mg\sin \theta } \right)}}{{\left( {mg\cos \theta } \right)}}[/tex]

Rearrange the above expression.

[tex]{\mu _s} = \tan \theta[/tex]                                   …… (3)

Substitute [tex]{17^ \circ }[/tex] for[tex]\theta[/tex] and [tex]9.8\,{\text{m/}}{{\text{s}}^{\text{2}}}[/tex] for g in equation (1).

[tex]\begin{aligned}{F_{{\text{net}}}}&=m\left( {9.8\,{\text{m/}}{{\text{s}}^{\text{2}}}}\right)\sin \left({{{17}^\circ}}\right)\\&=\left( {2.865}\right)m\\\end{aligned}[/tex]

Substitute [tex]{17^ \circ }[/tex] for [tex]\theta[/tex]  in equation (3).

[tex]\begin{gathered}{\mu _s}=\tan \left( {{{17}^ \circ }} \right)\\=30.06\\\end{gathered}[/tex]

Learn more:

1.  Motion under friction https://brainly.com/question/7031524.

2.Conservation of momentum https://brainly.com/question/9484203.

3. Net force on the body https://brainly.com/question/6125929.

Answer Details:

Grade: College

Subject: Physics

Chapter: Kinematics

Keywords:

Friction, acceleration, carpeted floor, mug, inclined plane, force, relative motion, motion, net force, oppose, 9.8 m/s2, 17 degree, 0.67 m/s^2, 30.056, 30.06, 31,(2.865)m,(2.87)m.

When it comes to the composition of the Earth, three main types of rock come into play. These are known as metamorphic rock, sedimentary rock, and igneous rock, respectively. Also known as “fire rock” (derived from the Latin “ignus”), these type of rock are the most common type of rock in the Earth’s surface. In fact, combined with metaphoric rock, igneous rock makes up 90 to 95% of all rock to a depth of 16 km from the surface.

Igneous rocks are also very important because their mineral and chemical makeup can be used to learn about the composition, temperature and pressure that exists within the Earth’s mantle. They can also tell us much about the tectonic environment, given that they are closely linked to the convection of tectonic plates. But just how are these rocks formed?

In essence, igneous rocks are formed through the cooling and solidification of magma (or lava). As hot, molten rock rises to the surface, it undergoes changes in temperature and pressure that cause it to cool, solidify, and crystallize. All told, there are over 700 known types of igneous rock, the majority of which are formed beneath the surface of the Earth’s crust. However, some are also formed on the surface as a result of volcanic activity.

Those that fit into the former category are known as intrusive (or plutonic) rocks, while those that fit into the latter are known as extrusive (or volcanic) rock. In addition to these, there is also hypabyssal (or subvolcanic rock), a less common form of igneous rock that is formed within the Earth between plutonic and volcanic rocks. hope that helped

Planck's equation can be used as a formula to determine the energy of a photon. In this problem, given the frequency and using 6.63 x 10^-34 J.s as Planck's constant, the energy can be calculated. This Physics concept is useful in understanding the energy-frequency relationship of photons.

To calculate the energy of a photon, we can use the Planck's equation E = hv, where 'E' is the energy of the photon, 'h' is the Planck's constant and 'v' is the frequency of the photon.

In this case, the frequency of the photon 'v' is given as  3.55 x 10^17 Hz and Planck's constant 'h' is a universally accepted constant which is 6.63 x 10^-34 J.s. Substituting these values into Planck's equation we get:

E = 6.63 x 10^-34 J.s x 3.55 x10^17 Hz

Upon calculating, the energy in Joules of the photon can be found.

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To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the number of neutron is 10.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.

Atomic number= number of proton=number of electron

Mass number= number of proton/electron + number of neutron

Mass number=19

atomic number =9

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

19=9 + number of neutron

number of neutron=10

Therefore, the number of neutron is 10.

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Answer:

the answer is 25 m/s

Explanation:

hope this helped out

The electron, ejected horizontally and not influenced by external forces such as gravity, magnetic, or electric fields, would have a vertical displacement of zero and thus would travel directly to the screen without any vertical deviation.

An electron ejected horizontally with a speed of 1.5 × 106 m/s from an electron gun will continue to move in a straight line horizontally in the absence of any external forces. Since there is no mention of gravity, magnetic fields, or electric fields in the stated problem that could cause the electron to deviate from its path, the vertical displacement of the electron before hitting the screen would be zero if we disregard such forces. Hence, the electron will travel horizontally and hit the screen without any vertical displacement.

Answer:

They are chemically inert

Explanation:

Noble gases as the name suggest are gases. So that is one of the similarities that they share. But their more important similar property is that they are chemically inert i.e they are unreactive. This is due ti the fact that they have full outer energy levels which is why they never take part in chemical reactions because their electronic structure is already stable.

Answer:

A) 3.2 kg ball

Explanation:

To solve this problem we must apply Newton's second law of motion, and it states:

"The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object."

[tex]F=m*a[/tex]

Being:

F= net force

m=mass of the object

a= acceleration

As acceleration is inversely proportional to mass, we conclude that to have fastest acceleration Beth should use the lighter ball of 3.2Kg mass.

Final answer:

Momentum depends on mass and velocity, and in this scenario, the basketball will have three times more momentum than the softball despite moving at the same velocity. Understanding momentum is key in analyzing the effects of collisions and interactions involving objects of different masses and velocities.

Explanation:

Momentum is a measure of how hard it is to stop an object and depends on both mass and velocity. The momentum of an object (p) is given by the product of its mass (m) and velocity (V): p = mV. In the given scenario, if a basketball has three times greater mass than a softball but both are moving at the same velocity, the basketball will have three times more momentum compared to the softball.

This difference in momentum reflects the impact a player with a greater mass but the same velocity can have in collisions, as momentum is crucial in determining the effect of such interactions. Therefore, if the mass of the softball is m, and the velocity of both the softball and basketball is v, then the momentum of the softball will be m × v and the momentum of the basketball will be 3m × v, which is three times greater than that of the softball.

Ideal mechanical advantage would be from a device with the assumed probability that there is no friction, wear or flexion. It is the ratio of the force put out (load) to the effort (force put into the machine).

Actual mechanical advantage takes into consideration of friction, wear and flexion. It is the ratio of the effort output and the effort input.

Answer:

Ideal mechanical advantage does not considers frictional losses of force into account whereas actual mechanical advantage does.

Explanation:

Mechanical advantage is the increase in the output force by a simple machine which is due to increased arm length on which the output is desired. This is in accordance with the law of conservation of energy and moments.

Mathematically give as;

[tex]F_E.E=F_L.L[/tex]

where:

[tex]F_L\ \&\ F_E[/tex] are the force due to load and effort respectively.

[tex]E\ \&\ L[/tex] are the length of effort arm and load arm respectively.

Now the mechanical advantage:

[tex]MA=\frac{F_E}{F_L} =\frac{L}{E}[/tex]

In practical cases we are not able to take the full advantage of this multiplied force due to the frictional losses.

Answer:

the kinetic energy is transformed into heat energy evident by the warmth of the tires and is dissipated.

When a car is braked to a stop, its kinetic energy is transformed into heat energy.

Energy cannot be created or destroyed, according to the law of conservation of energy. However, it is capable of change from one form to another. An isolated system's total energy is constant regardless of the types of energy present. The law of energy conservation is adhered to by all energy forms.

In a nutshell, the law of conservation of energy asserts that the system's total energy is conserved in closed systems, or systems that are separated from their environment.

When a car is braked to a stop, its kinetic energy works against friction and transformed into heat energy as the law of conservation of energy asserts that the system's total energy is conserved in closed systems, or systems that are separated from their environment.

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Answer:

Δs=24 km

Explanation:

vA=74km/h

vB=90km/h

tA=tB=1,5h

Δs=?

sA=vA*tA

sB=vB*tB

Δs=sB-sA

Δs=vB*tB-vA*tA,  tB=tA=t

Δs=t*(vB-vA)

Δs=1,5h*(90km/h-74km/h)

Δs=1,5h*16km/h

Δs=24 km