PLEASEE HELP MEEE!!!!!!’

The speed of the block after the 2,60 m is determined as 6.38 m/s.

The work done on the block is calculated by applying the principle of Newton's second law of motion to determine the net work done on the block as shown below.

W = F(net)d

where;

F(net) = Fcosθ - Ff

where;

F(net) = 50 cos(30) - 4.2

F(net) = 39.1 N

The speed of the block is calculated by applying the principle of work energy theorem.

K.E = W

¹/₂mv² = F(net)d

mv² = 2F(net)d

v² = [2F(net)d] / m

v = √[2F(net)d] / m]

v = √[2 x 39.1 x 2.6] / 5]

v = 6.38 m/s

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The mass of the object that has a density of 15g/cm³ and a volume of 3cm³ is 45g.

The density of a substance is the measure of the mass of matter contained by a unit volume. It can be calculated as follows:

Density = mass ÷ volume

This means that the mass can be calculated by multiplying the volume by the density of the substance.

According to this question, an object has a density of 15g/cm³ and a volume of 3cm³. The mass can be calculated as follows:

Mass = 3cm³ × 15g/cm³

Mass = 45g

Therefore, 45 grams is the mass of the object.

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The force would be F0=9×F1

Solution

The equation describing the attractive force between two masses (m) separated by a distance (r) is known as Sir Isaac Newton's universal law of gravitation (F=Gmm/r²)

By putting the values given in the question -

F0= Gm1m2÷r²

F1=Gm1m2÷(3r)²

By dividing F0 and F1 we get -

F0=9×F1

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Given,

The velocity of the spaceship in as observed by an observer at the earth, v=0.75c

The time interval as observed by the observer on the earth, t₁=2.5 s

The time elapsed in the ship's frame of reference is given by,

On substituting the known values,

Thus the time elapsed for an observer in the spaceship is 3.79 s

a)The image is attached to the question

b) The weight is 9310 N

c) The normal force is -9310 N

d) The net force is 8110 N

Let s recall that action and reaction are equal and opposite. This implies that the normal force and the weight of the object are the same in magnitude but opposite in direction. Given this, we can now answer the question as shown.

b) The weight of the car is obtained from 950 kg * 9.8 m/s^2 = 9310 N

c) The normal force on the car = -9310 N

d) The force on the car that allows it to go up the hill is the net force which is obtained from ;

9310 N - 1200 N = 8110 N

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If point 0 is in equilibrium. P and Q values, respectively. 30% Q 10v3N equals 20√3N and 10N

A state of a system in which neither its state of motion nor its internal energy state changes over time It is a state of equilibrium between opposing forces or actions that can be static (as in a body acted on by forces with a zero resultant) or dynamic (as in a reversible chemical reaction when the rates of reaction in both directions are equal).

When a particle's net external force is zero, the particle is said to be in equilibrium. Using Newton's First Law of Motion, we can say that the particle is either at rest or in uniform motion.

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The equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.

The rate of flow of charge per unit cross - sectional area is called electric current. Mathematically -

i = dq/dt

From this -

dq = i dt

∫dq = ∫i dt

Q = it

Current is measured in amperes and is a Tensor quantity.

Given is a circuit that measured a current of 11.5 milli amperes.

Now, the current in milli amperes is used to give the measurement of small amount of current. One milliampere of current is equivalent to -

1 mA = (1/1000) A = 10 ⁻³ A

So, in order to calculate the total current in amperes, we will multiply 11.5 milliamperes by 10 ⁻³ as follows -

11.5 milliamperes [mA] = 11.5 x 10⁻³ amperes[A]

Therefore, the equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.

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Work must be done on the particle to cause it to move to the right at 33 m/s  is 5.54 J

What is work done?

When we apply force "F" to a block, the body moves with some acceleration or, additionally, its speed increases or decreases depending on the direction of the force. The system's kinetic energy changes as speed increases or decreases. Since we are aware that energy cannot be created or destroyed, it must be changed into another form. This perspective refers to it as completed work. When negative energy is finished, the energy declines, and when positive energy is finished, the energy rises. Now, we'll see how to gauge the amount of work done.

Work Done on a Particle:

The change in a particle's kinetic energy is what is referred to as work done on a particle. The particle has an initial kinetic energy if it is originally moving. However, there is also a change in the particle's kinetic energy if its direction of travel changes.

u=29m/s

v=43m/s

from work- energy theorem

W=change in K.E

= 1/2mv^2 -1/2mu^2

= 1/2m(v^2 - (-u)^2)

=0.5*0.011*(43*43-29*29)

W=5.54 J

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The best interpretation from the graph can be train speed up for 3 minutes, travelled at a steady speed for 2 minutes then speed up again.

Speed is defined as change in position of the body with respect to time or distance travelled by body per unit time is known as speed. Speed is a scalar quantity it have only magnitude.

Given graph in the question position or distance vs time initially the train is moving speed up for three seconds after that for two minutes train is moving with steady state, speed is not changing during this time after that train again speed up till end.

By looking at graph best interpretation is initially train speed up for 3 minutes, travelled at a steady speed for 2 minutes then speed up again.

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The acceleration of the system is 4.6 m/sec² and tension in the rope is 290 N.

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.

Given in the question two masses each of mass 30 kg and 20 kg a boy pull them with force of 500 N in opposite to that there is force of 196 N on 20 kg mass and frictional force 73.5 N on 30 kg mass net force is given as 230.5 N and total mass is 50 Kg .

So, acceleration = 230.5/ 50

                        a = 4.61 m/sec²

And tension on the rope is 290 N.

The acceleration of the system is 4.6 m/sec² and tension in the rope is 290 N.

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The pulling force exerted by the locomotive of mass 1.1 * [tex]10^{5}[/tex] kg on the first train car of mass 8.1 * [tex]10^{4}[/tex] kg is 81 KN

F = m a

F = Force

m = Mass

a = Acceleration

Mass of each car = 8.1 * [tex]10^{4}[/tex] kg

Since the locomotive has to pull 2 cars,

m = 16.2 * [tex]10^{4}[/tex] kg

a = 0.5 m / s²

F = 16.2 * [tex]10^{4}[/tex] * 0.5

F = 8.1 * [tex]10^{4}[/tex] N

F = 81 KN

This formula used to solve the problem is derived from Newton's second law of motion. It states that the force is the rate of change in momentum. It can also be written as,

F = dp / dt

Therefore, the pulling force exerted by the locomotive on the first car is 81 KN

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A1 = F1 / M

A1 = 5.6 / 2.7 = 2.074 m/s²

A2 = F2 / M

A2 = 1.2 / 2.7 = 0.444 m/s²

Therefore, total acceleration = A1 + A2 = (2.074 + 0.444)m/s²

                                                               = 2.518 m/s²

calculating acceleration using mass and force:

It can be summed up by the following equation: force (N) = mass (kg) x acceleration (m/s2). When a result, an object with constant mass will accelerate directly as force is applied. When two objects of different masses are subjected to the same force, the heavier object accelerates more slowly than the lighter object.

When a physical influence called force is imparted to an item, the object accelerates in the direction the force was applied from. The quantity of substance a thing contains is expressed by its mass, which is expressed in kilograms. The rate at which an object's velocity along the same straight line as the unbalanced force changes is known as its acceleration.

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The month with the most cost of heating is January followed by February and then December, mainly the winter months when the temperature is extremely cold.

The cost of energy usage is the amount of money spent to purchase or usage energy in a given time period.

The cost of energy usage increases as more and more energy is consumed or usage in heating, cooking, production, etc.

From the given bar graph, we can conclude that the cost of heating the certain house increases in the following months;

January  - $55

February - $49

March - $40

December  - $42

Thus, the month with the most cost of heating will have the tallest bar when compared to other months.

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Voltage amplifiers use a voltage input signal and a current output signal. This statement is false.

A voltage amplifier uses a voltage input and a voltage output.

In an electric circuit, the job of a voltage amplifier is to amplify the high input voltage as compared to the low input voltage.

In general, transistor function as voltage amplifiers in a circuit and are used to increase the power, voltage, and current of a signal.

Generally, these amplifiers are used in audio devices and equipment, radio and television broadcasting, wireless communications, and so on.

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Since the student constructs a catapult that fires a ping pong ball horizontally, the thing that the student do to make the ping pong ball stay in the air longer is to stretch the rubber bank longer before shooting the ball.

Rubber bands serve as the ping pong catapult's power source. Rubber bands are stretched when the catapult arm is pulled back, which causes them to store potential energy.

Rubber bands constrict as soon as the catapult's arm is released, converting their potential energy into the kinetic energy or motion energy of the ping pong ball as it soars through the air. The kinetic energy of an object is determined by its mass (how much weight it has) and velocity (how fast it is going).

Therefore, The heavier object will have more kinetic energy when two things are travelling at the same speed. The object travelling more quickly will have greater kinetic energy if the two objects have the same mass but are moving at different speeds.

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The cooperate strategy that represents this is vertical integration.

A corporate strategy is a long-term plan with specific objectives for a business. Although each goal's objective may vary, the main aim of a corporate strategy is to advance the business.

Vertical integration is a tactic that enables a business to streamline operations by directly controlling different stages of the production process instead of depending on outside suppliers or contractors.

Instead of outsourcing these operations, a business might achieve vertical integration by acquiring or forming its own manufacturers, distributors, and retail outlets. However, due of the significant initial capital expenditure needed, vertical integration may be deemed risky with potential drawbacks.

Therefore, vertical integration is the cooperative method that represents "A big appliance maker that has been buying electronic controls from a supplier decides to design and build the controls in-house."

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According to the picture Vector A and Vector B is shown. After the subtraction the vector difference will be Vector A-Vector B are shown in the picture below. We are using the triangle law for this question.

Vector is a quality that shows that shows that a physics term has two main characteristics. It has value and direction both. The addition and subtraction is not usual for this quantity. It has some specific rules to add and subtract.

Vector is a quantity which have value and direction both. So its subtraction is not going to happen in regular algebraic ways. It has some specific laws. It has mainly two laws that we use,

In these two laws we use the triangle law to subtract the two vectors. Vector A which direction was in fourth quadrant an Vector B which direction is in first quadrant.

After the subtraction we got that the third and the resultant vector was shown in a manner in the picture that makes a perfect triangle.

So according to the discussion we got that, after using the triangle law of subtraction the (Vector A-Vector B) are shown in the picture below.

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23.38 ° to the positive x-axis

Explanation

Step 1

draw the vectors

Step 2

add the vectors, ( component to component)

so

a) get the components of V1

b) components of V2

c) add

so, the magnitude of the displacement is

finally, the direction

as we have a rigth triangle

let

opposite side= 12.9

adjacent side=23.8

Now, use the tan function to find the angles

so

therefore, the direction of the resultant is

23.38 ° to the positive x-axis

I hope this helps you

The mass of the substance is 14.58g.

Solution:

Heat  ΔQ = 350J

Initial temperature  T = 10°C

Final temperature [tex]T^{1}[/tex] = 30°C

Change in temperature:  

ΔT = [tex]T^{1}[/tex] - T

= 30 - 10

=  20°C

Specific heat: 1.2 J/g°C

The mass of a substance:

ΔQ = mcΔt

m = ΔQ/cΔt

= 350/1.2 x 20

= 14.58 grams.

Molecular weight is the sum of the average masses of the atoms in the molecules of a substance. It is calculated by adding together the atomic masses of the elements in the substance each multiplied by the index of the molecular formula whether stated or implied. The mass of 1 mole of a substance in 1 gram is called the molar mass.

Find the atomic weight of each element in the formula multiply it by the number of atoms of that element in the compound, and add it to all other elements. This gives the mass in grams of one mole of the molecule. The molar mass of a substance is the mass in grams of one mole of that substance. This mass is the atomic mass of the chemicals that make up the substance, expressed in atomic mass units AMU.

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Answer:

14.58 g or 15 g

Explanation:

Answer:

throwing something heavy will take longer to throw then something light because force times time,  the heavier object will take longer to throw, and will acquire more momentum

Explanation:

It is difficult to hold a school bag having a strap made of a thin and strong string, due to the relatively high strain on the shoulders.

Pressure is defined as the force applied perpendicularly to an object's surface divided by the surface area over which it is applied.

There are three types of pressure.

An iron nail sinks in water because density is more than that of water.

A camel can run efficiently in the desert sand because they have wide feet, which both increase the surface area of their feet and help them balance their weight on loose sand.

An army tank weighing more than a thousand tones rests upon a continuous chain because the tank, which weighs more than one ton, is supported by a continuous chain in order to disperse the force of the tank's weight over a wide region. Because force per area equals pressure.

Cutting tools have sharp edges so that they can generate a lot of pressure and readily cut objects.

A truck or motor bus has much wider tyres because more the area ,less the pressure.

It is easier to swim in salt water than in freshwater because the fluid density, the greater the upthrust.

The skydivers float in the air because at that point, the force exerted by gravity and air resistance on your body equals zero, causing your body to float in the air.

A block of plastic released under water comes up to the water's surface because plastic has a lower density than water, hence its buoyant force is larger than its weight.

Thus, it is difficult to hold a school bag having a strap made of a thin and strong string, due to the relatively high strain on the shoulders.

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The force that prevents motion when the surfaces of two objects come into contact is known as friction. The net force acting on the body is 55N

Pseudo-force, which is a hypothetical force similar to frictional force, always acts in the opposite direction that an item is moving in.

frictional force is of 3 types. static friction, limiting friction, kinetic friction.

Frictional force is the force created when two surfaces come into contact and slide against each other. Several factors influence frictional force: The surface texture and the amount of force impelling them together have the greatest influence on these forces.

so total force acting on the body

F net= Pseudo force+ frictional force

F net= ma+ 5= 5*10+5= 55 N

m= mass

a=g=acceleration due to gravity=10m/s²

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4.42 m/s is minimum horizontal velocity with the cliff divers leave the top of the cliff if they are to miss the rock.

Height of the cliff is given as [tex]h=37.4m[/tex]

now the time taken by the diver to hit the surface is given as

[tex][h=1/2gt^2],[37.4=1/2\cdot9.8t^2],[t=2.73s][/tex]

Now in the same time it has to cover a distance of 12.08 m

the speed in horizontal direction

[tex][v_x=x/t],[v_x=12.08/2.73],[v_x=4.42m/s][/tex]

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The statement that describes at t =5 second is is the object speed up.

According to Newton's second law of motion, the acceleration of a body is equal to the net force acting on the body divided by its mass, a = Fm. This acceleration equation can be used to calculate the acceleration of an object if the mass of the object and the net force acting on it are known. The only acceleration of the projectile is the downward acceleration due to gravity.

The projectile has a vertical acceleration of 9.8 m/s/s throughout its trajectory. This acceleration value is constant. This means that the vertical velocity changes by the same amount every second. Instantaneous velocity is the speed of an object at a particular point in time. If the velocity is constant the average velocity for any time interval will not differ from the instantaneous velocity at that point in time.

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There are three layers of Earth:

Crust, mantle, and core.

Crust:  The crust is that the outmost layer of the earth, the cooled and hardened part of the planet that ranges comprehensive from more or less 5-70 klick (~3-44 miles).

This layer makes up only one of the whole volume of the planet, although it makes up the whole surface (the continents and also the ocean floor).The dilutant elements are the oceanic crust, which underlies the ocean basins at a depth of 5-10 klick (~3-6 miles), whereas the thicker crust is that of the continental crust.

Mantle: The mantle is present between the Earth's crust and its super - heated inner layer and is almost 2900 km thick.

This layer makes up 84% of Earth's total volume.

Core: The innermost and the hottest layer of Earth is known as the core.

Most liquid metals reside in this specific layer like Iron and Nickel.

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The alpha particle experience electric repulsive force forces on the alpha particle could cause this motion.

The nuclear positive charge would exert an electric repulsive force on an alpha particle if it were outside the nucleus, giving it a significant electric potential energy as indicated. According to the slope of the potential energy curve, it would be subject to the inverse square law Coulomb force.

These substances are also known as alpha emitters as a result. The symbol for an alpha particle is typically the Greek letter alpha, after which it is named. Prior to the discovery of beta particles and gamma rays, it was the first form of nuclear radiation.

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Two valance electrons are occupied by б-bond and four valance electrons occupy π- bonds.

Sigma and pi bonds are types of covalent bonds that differ in the overlapping of atomic orbitals. Covalent bonds are formed by overlapping the atomic orbitals.

Generally, all single bonds are sigma bonds. They can be formed via the following combination of atomic orbitals.

During the formation of pie bonds, the axes of the atomic orbitals are parallel to each other whereas the overlapping is perpendicular to the internuclear axis.

Pi bonds are generally weaker than sigma bonds.

Therefore there are two valance electrons in б-bonds and four electrons in π-bonds.

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Spectroscopy is the technique that astronomers most frequently apply to determine the creation of stars, planets, and other objects.

Therefore , on conclusion i.e. each element has its own unique set of wavelengths that it can absorb light at. Based on these wavelengths, astronomers can determine the composition of an object from its spectra. Spectroscopy is the technique that astronomers most frequently apply to determine the build of stars, planets, and other objects.

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Answer:

See below

Explanation:

NET forward force =  175 + 125 -140 -120 = 40N

F = ma

40 = 75 * a

a = 40 / 75 = .53 m/s^2   to the right (? <===if they are pulling to the right)