9) Which is a difference between plant and animal cells?

The work done on the barbell is -165.62 Nm.

Explanation:

Work done on any object is the measure of force required to move that object from one position to another. So it is determined by the product of force acting on the object with the displacement of the object.

In the present problem, the displacement of the object on acting of force is given as 1.3 m. And the weight of the object which is a barbel is given as 13 kg. As the work is to lift the object from the ground, so the acceleration due to gravity will be acting on the object. In other words, the force applied on the object to lift it should be in opposite direction to the acting of acceleration due to gravity.

Thus, [tex]Force = - Mass * Acceleration due to gravity = - 13 * 9.8 =-127.4 N[/tex]

Now, the force is -127.4 N and the displacement is 1.3 m.

So, [tex]Work done = F*d[/tex]

[tex]Work done = -127.4* 1.3 = -165.62 Nm[/tex]

So, the work done on the barbell is -165.62 Nm.

Answer:

Initial angular position of the disc is 3 radian

Explanation:

As we know that the angular acceleration of the disc is given as

[tex]\alpha = 0.50 rad/s^2[/tex]

initial angular speed is given as

[tex]\omega = 1 rad/s[/tex]

now we know that angular displacement of the disc is given as

[tex]\theta = \omega t + \frac{1}{2}\alpha t^2[/tex]

[tex]\theta = 1(2) + \frac{1}{2}(0.5)(2^2)[/tex]

[tex]\theta = 3 rad[/tex]

now we have

[tex]\theta_f - \theta_i = 3 rad[/tex]

[tex]6 rad - \theta_i = 3[/tex]

[tex]\theta_i = 3 ard[/tex]

Final answer:

To find the initial angular position of the disk, we used the kinematic equation for rotational motion and the given values (angular acceleration, initial angular velocity, and final angle) to calculate that the disk's angular position when the acceleration started was 3.0 rad.

Explanation:

The problem is asking us to find the angular position of the disk when it started accelerating. Since we know the angular acceleration, the initial angular velocity, and the final angular position, we can use the kinematic equations for rotational motion to determine the initial angular position.

The kinematic equation we'll use is:
[tex]\( \theta = \theta_0 + \omega_0t + \frac{1}{2}at^2 \)[/tex],
where [tex]\(\theta\)[/tex] is the final angular position,[tex]\(\theta_0\)[/tex] is the initial angular position, [tex]\(\omega_0\)[/tex] is the initial angular velocity, [tex]\(a\)[/tex] is the angular acceleration, and [tex]\(t\)[/tex] is the time.

Given:
[tex]\(\theta = 6.0 \text{ rad} \)[/tex] (final angular position),
[tex]\(\omega_0 = 1.0 \text{ rad/s} \)[/tex] (initial angular velocity),
[tex]\(a = 0.50 \text{ rad/s}^2 \)[/tex] (angular acceleration), and
[tex]\(t = 2 \text{ s} \)[/tex] (time).
We rearrange the equation to solve for [tex]\(\theta_0\)[/tex]:
[tex]\(\theta_0 = \theta - \omega_0t - \frac{1}{2}at^2 \)[/tex]

Plugging in the values:
[tex]\(\theta_0 = 6.0 \text{ rad} - (1.0 \text{ rad/s} \cdot 2 \text{ s}) - \frac{1}{2} \cdot 0.50 \text{ rad/s}^2 \cdot (2 \text{ s})^2 \)[/tex]
[tex]\(\theta_0 = 6.0 \text{ rad} - 2.0 \text{ rad} - 0.50 \cdot 2 \text{ rad} \)[/tex]
[tex]\(\theta_0 = 6.0 \text{ rad} - 2.0 \text{ rad} - 1.0 \text{ rad} \)[/tex]
[tex]\(\theta_0 = 3.0 \text{ rad} \)[/tex]
So the disk's angular position when the acceleration started was 3.0 rad.

Answer: F=3158N

Explanation:

Work is the product of force applied and the distance the object moves along the force applied. Work is measured in joules and the equation is as follows

W = F x d

So that F = W/d

F = 30000 J / 9.5m

F = ~3158 N

Final answer:

The applied force can be found using the work equation. Given that 30000 J of work was done over 9.5 m, the force is approximately 3157.89 N.

Explanation:

To find the applied force, we can use the equation for work, which is Work (W) = Force (F) × Distance (d). We were given the work done as 30000 J (joules) and the distance as 9.5 m (meters). Re-arranging the equation to solve for Force gives us F = W / d.

Plugging in our known values, we get:

F = 30000 J / 9.5 m

F = 3157.89 N (rounded to 2 decimal places)

Therefore, the applied force is approximately 3157.89 N (newtons).

Answer:

Explanation:

The picture shows a crushed can inside a bowl with iced water.

This experiment consists on pouring a small amount of water inside a can, heating the can directly on a kitchen burner, using a heat insulating clamp, and placing the can with the open end face down in a bowl with iced water.

The particles inside the can, when heated on the kitchen burner will expand, since the heat supplied increases the kinetic energy of the particles vigorously. Since the can is open, the pressure inside the can equals the pressure outside the can (the atmospheric pressure).

When the can is put face down in contact with the iced water, the air inside the can will cool down rapidly, causing the pressure (according to Boyle's law) to decrease quickly.

Now, there will be a huge difference between the atmospheric pressure and the pressure inside the can, which will generate a net force pointing radially toward the can strong enogh to crush the can.

Answer:

Along boundaries plates are brittle and the crust fractures (breaks and cracks) forming Faults

Explanation:

Brittle material are substances that looks hard but can be easily broken by strain. Brittle deformation leads to crack and fracture of the material involve. Brittle crust lacks elastic ability , elasticity in this rocks are almost absent.

Fractures and cracks in rocks form fault. Fault is a discontinuity in rocks with an appreciable displacement. Fault is a displacement in rocks relative to one part. Generally, Fault occur when brittle rock fracture or crack, the fractured rocks move relative to one another.

Differential stress can cause rocks to fracture. If that part of the crust lacks ductility the stress on the rock will cause a brittle deformation. The brittle deformation causes fracture(breaks and cracks) leading to structure like Faults and Joints.    

Answer:73.47kg approximately

Explanation:

Weight(w)=720N

Acceleration due to gravity(g)=9.8m/s^2

Mass(m)=?

Mass=w/g

Mass=720/9.8

Mass=73.47kg approximately

To determine the mass of an object with a weight of 720 N, use the formula w = mg and divide the weight by Earth's gravitational acceleration, yielding a mass of 73.47 kilograms.

To find the mass of an object that weighs 720 N on the surface of Earth, we can use the formula for weight, which is w = mg, where w is weight in newtons, m is mass in kilograms, and g is the acceleration due to gravity in meters per second squared (m/s²). On Earth, g = 9.80 m/s².

Starting with the weight equation:

Therefore, the mass of the object on Earth is 73.47 kilograms.

Answer:

At the surface of the Atlantic Ocean

Explanation:

The atlantic ocean is a worm ocean and the surface has the least dense water. This is because the denser layer of water sinks, while the least dense floats.

The Atlantic Ocean stands out in the choices with warmer temperatures at depths. This results from the different flow dynamics in the semi-enclosed Mediterranean Sea.

Answer:

Moving water

Ice and glaciers

humans and animals

Explanation:

Erosion is the removal of weathered materials from the surface of earth. It is one of the processes that sculpts the surface of the earth due to its unique earth moving capabilities.

The main agents that contribute to erosion include water, wind, ice(glaciers), and gravity. They each shape the earth's landscape in distinct ways such as through water erosion, wind erosion, glacial erosion, and erosion caused by gravity.

There are several agents that significantly contribute to erosion, a common geologic process. The main agents of erosion include water, wind, ice(glaciers), and gravity. Water erosion occurs when moving water such as rain, rivers, or ocean waves wear down the earth's surface. Wind erosion happens especially in dry, bare areas where loose soil can be easily picked up by the wind. A glacier's movement can erode the land through a process called glacial erosion. Lastly, gravity contributes to erosion through landslides and rockfalls, where rocks and soil are pulled down by gravity. Each of these agents shape the earth's landscape in different ways.

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Answer:

They are quickly replenished

Explanation:

Renewable resources will never run out because they are quickly replaced by nature.

ask me if I you need more help

Answer:

c

Explanation:

Answer:

The approximate terminal velocity of a sky diver before the parachute opens is 320 km/h.

Explanation:

                           Buoyancy force + drag force = Gravity

Answer:16ohm

Explanation:

Potential difference(v)=24volts

Current(I)=1.5amperes

Resistance(r)=?

r=v/I

r=24/1.5

r=16ohms

Final answer:

To calculate the resistance of an electrical appliance using Ohm's Law, divide the voltage by the current. With a 24-volt source and a draw of 1.5 amperes, the appliance's resistance is 16 ohms.

Explanation:

To find the resistance of an electrical appliance, we can use Ohm's Law, which states that resistance equals voltage divided by current (R = V/I). Given that the appliance draws 1.5 amperes of current from a 24-volt source, we can calculate the resistance as follows:

R = V / I
R = 24 V / 1.5 A
R = 16 ohms

Therefore, the resistance of the appliance is 16 ohms.

Answer:

D

Explanation:

You need to pull a special "lever" to let the handicapp ramp out and it uses a wedge to push itself out

C: pair of scissors

- this is because the blades on a pair of scissors would identify as the wedge

- and the grip part of the scissors would be the lever.

Answer:

Thomas Young

:0

:)

Answer:

it was Young

Explanation:

Answer:A loudspeaker produces a musical sound by means of the oscillation of a diaphragm. The loudness of sound produced depends upon Amplitude of vibration.

Explanation:

The loudness of a sound depends upon the amplitude of vibrations. A sound will be louder if the amplitude of vibration is greater but if it is smaller than sound will not be louder.

Now it is the vibration of a sound that determines it's amplitude. Amplitude signifies the maximum distance moved. It means the extent of vibration If is vibrations have more amplitude than sound will be louder but if the amplitude of vibrations is shorter than the sound will be softer.

The loudness of sound produced depend on the frequency of oscillation, the amplitude of oscillation, the kinetic energy of oscillation

Explanation:

Loudness of an instrument is proportional to its amplitude

The  amplitude ,frequency of the sound wave will be a function of both the speed and the amplitude of the cone.( i.e. keep the amplitude constant and vary the kinetic energy of the oscillation of the speaker cone and the frequency will change. )

If you step slowly into a pool, the ripples you make are reasonably small, whereas if you take a running jump (i.e. high kinetic energy).

Answer:

shuffling shoes

Explanation:

Answer:

Flow rate of air is given as 83.33 cubic feet per minute

Explanation:

As we know that total volume of the air flow is given as

[tex]V = 10,000 cubic feet[/tex]

also we know that total time is

[tex]t = 2 hours = 120 min[/tex]

now we have flow rate given as

[tex]Q = \frac{V}{t}[/tex]

[tex]Q = \frac{10000}{120}[/tex]

[tex]Q = 83.3 cf/m[/tex]

Answer: The answer is force

Explanation:

Answer:

A few examples of acceleration are the falling of an apple, the moon orbiting around the earth, or when a car is stopped at the traffic lights. Through these examples, we can understand that when there is a change in the direction of a moving object or an increase or decrease in speed, acceleration occurs. Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction.

Explanation:

Acceleration can be caused by a hill, wind, water movement, and a stop light.

The options that would most likely cause acceleration are a hill, wind, water movement, and a stop light.

A hill causes acceleration when an object rolls down due to the force of gravity. Wind can cause acceleration if it pushes an object. Water movement can cause acceleration if it exerts a force on an object. Finally, a stop light can cause acceleration when a car goes from a stationary position to moving quickly when the light turns green.

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Answer: force of gravity is 885N

Explanation:

Answer:1N

Explanation:

Mass1(m1)=90kg

Mass2(m2)=6x10^24kg

Gravitational constant(G)=6.67x10^(-11)

Distance apart(d)=6.38x10^6m

Force of gravity(f)=?

F=(Gxm1xm2)/d^2

F=(6.67x10^(-11)x90x6x10^24)/(6.38x10^6)

F=(3.6018x10^16)/(6.38x10^6)

F=1N

Force of gravity=1N

Answer:

Mass is considered as positive as it is the amount of matter and as nothing weighs less than zero. But the concept of charge in electricity can be both positive and negative because of the behaviour Observed in electrical phenomena , Conservation of charge , Interaction of charged objects and Atomic and subatomic structure

Explanation:

Understanding the nature of mass and its positivity

Mass is the amount of matter in an object. As the amount of matter cannot be less than zero. It is always greater than or equal to zero.

Exploring the concept of electric charge
Incase of electric charge it acts differently as per the system it belongs to, The following are some observation which substantiate the presence of negativity and positivity of electric charge.

a) Observations of electrical phenomena: People have observed electrical effects, such as static electricity, where objects can be attracted or repelled without physical contact. This led to the idea that there are two types of charges involved.

b) Conservation of charge: Scientists observed that charge is conserved in interactions. For example, during various experiments involving the charging and discharging of objects, the total amount of charge in a closed system remained constant. This observation supports the idea of positive and negative charges.

c) Behavior of charged objects: Through experiments, scientists found that like charges repel each other, while opposite charges attract. This behavior is consistent with the existence of positive and negative charges.

d) Atomic and subatomic structure: Detailed studies of atoms revealed that they consist of positively charged protons, negatively charged electrons, and neutral neutrons. The balance between protons and electrons determines the overall charge of an object.

Hence the mass never considered as negative and we think differently for electric charge

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Answer:

Electric field lines are generated on positive charges and terminate on negative ones. The field lines of an isolated charge are directly radially outward. The electric field is tangent to these lines. Magnetic field lines, in the case of a magnet, are generated at the north pole and terminate on a south pole.

Answer:

a.95J

b.90J

Explanation:

a.Applying energy conservation laws:-

Energy  Into Bulb=[tex]Light \ Energy+Thermal \ Energy(Heat \ Energy)[/tex]

Given  that light energy=5J,and Total Energy=100J

[tex]Heat \ Energy= \Total \ Energy- Light \ Energy\\=100J-5J=95J[/tex]

b. Applying the laws in a above.

Total Energy=100J

Light Energy=10J

[tex]Heat \ Energy=100J-10J=90J[/tex]

The amount of property that is needed by a body or an object to work is called energy. It is conserved and can only be transferred from one object to another. It is estimated in Joules, calories or kW -h.

The energy that leaves the lamp is a. 95 J and b. 90J.

This can be estimated as:

a. According to the conservational law of energy:

[tex]\rm Energy \;in \;the\; bulb = Light \;Energy + Heat\; Energy[/tex]

Given,

Substituting values in the equation:

[tex]\begin{aligned}\text{ Heat Energy} &= \text{Total Energy - Light Energy} \\&= 100 - 5 \\&= 95 \text{J} \end{aligned}[/tex]

b. Applying the same law:

Given,

Substituting values:

[tex]\begin{aligned} \text{Heat Energy } & = 100 - 10 \\& = 90 \text{J} \end {aligned}[/tex]

Therefore, energies released are a. 95 J and b. 90J.

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Answer:

(A) conduction

Explanation:

parts of that are touching other parts and thus create heat!!!! dont lose that heat!

Answer:

The answer is convention.

Answer:

The Tenth Amendment

Explanation:

It supports states rights. it is apart of the "bill of rights". it expresses the federalism and state rights. It explains the the United states of Government is made this amendments to protect do the state rights. What people want.

Answer:

Explanation:

There are three kinds of heat transfer: conduction, convection, and radiation.

Conduction is the heat transfer by direct contact of a hot object with a cold object. It is transmitted by the vibration of the particles and not by translation motion. That is not what it is shown: the clouds are not in direct contact with the ground.

Heat transfer by convection is result of the motion of the particles in fluis, like water or air: particles move from hotter regions where they have high kinetic energy to colder regions where the particles have lower kinetic energy. Since the hotter fluids have lower density than the colder fluids, there will be a continous movement of parciles and heat. That is what is shown in the figure with the arrows.

Radiation heat transfer mechanism always occur but is only important when the temperature of the hot object is really high, like in a fire, or in a resistance to red hot, or in the Sun. The heat is radiated by infrarred radiation. That is not what is shown in the figure.

Mercury's surface has many craters because it has no atmosphere to protect it from meteoroids or comets.

Mercury's surface is riddled with craters, owing to the lack of a strong atmosphere to shield it from meteoroids and comets.

Meteoroids are small rocky or metallic objects in space that range in size from minuscule particles to bigger things with diameters of several metres.

They are generally relics of the solar system's early creation or debris expelled by asteroids or comets.

Unlike Earth, which has an atmosphere that burns up or deflects most smaller things that enter it, Mercury's thin atmosphere offers little to no protection.

Thus, meteoroids and comets can collide with its surface, causing countless craters to form over time.

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Answer:  Point A is the answer for the potential energy. Point D is the answer for the kinetic energy.

Explanation:

Answer:

point a and point d

Explanation:

2.72 N

Explanation:

Step 1:

From the basic formula in electrostatics

F = E * q

where F = Force due to charges

           E = Electric field strength

           q = Charge

Step 2:

From the given question

q= [tex]8.5*10^{-6} C[/tex]

E = [tex]3.2 * 10^{5} N/C[/tex]

F = [tex]8.5 * 10^{-6} * 3.2 * 10^{5} = 2.72[/tex] N

Answer:

B

Explanation:

E2020

Answer:

Explanation:

You are expected to have some understanding of how these devices work. It is helpful to actually see one or take it apart.

Magnetic force is involved where there is a magnet or material that responds to a magnet.

Of course a compass aligns itself with the magnetic field of the earth.

A magnetic door catch uses a magnet or pair of magnets to attract a metal plate, holding the door closed.

A speaker uses the reaction between the magnetic field in a coil of wire and that of a fixed magnet to move the speaker cone. (There are versions of speakers that use electrostatic force (electric field), but those are less common.)

A motor moves by creating a magnetic field in the armature that reacts with one in the stator. The latter can be created by fixed magnets, or by an electric current.

__

Electric force is involved when the operation is a result of the attraction between oppositely charged particles.

An electronic air filter uses the attraction of charged particles to attract "dirt" in the air to a charged surface, so removing it from the air.

Socks from the dryer often cling to each other (static cling) because the charge they get from rubbing other dryer contents is not dissipated in the dry air. (Fabric softener can reduce this effect, presumably by making the materials more electrically conductive.)