Gel electrophoresis sorts dna molecules on the basis of their

Answer:

a. Palladio's villa plans are frequently organized around a Great Room onto which other rooms open. This room provides the basis for arranging everything else.

Explanation:

Both of our eyes have a blind spot, in the retina of eye where there are no rods (light vision) or cons (color vision) cells. Its about a size of pinhead. The blind spot is place where the optic nerves exit the eye and connect to our brain. The problem is that we cannot notice this blind as the brain fills in information for us.

Answer:

a) [tex] F=32.0 N [/tex]

b) [tex] T_{1}=19.2 N [/tex]

c) [tex] T_{2}= 16.0 N [/tex]

d) [tex] T_{3}=3.2 N [/tex]  

Explanation:

Let's do the free body diagram per each body. In this particular case the rope has a mass so we have:

First block

[tex] F-T_{1}-m_{1}g=m_{1}a [/tex]                           (1)

Frist rope

[tex] T_{1}-T_{2}-m_{r}g=m_{r}a [/tex]                     (2)

Second block

[tex] T_{2}-T_{3}-m_{2}g=m_{2}a [/tex]                   (3)

Second rope

[tex] T_{3}-m_{r}g=m_{r}a [/tex]                               (4)

When,

T

₁ is the tension at the top of the rope 1

T

₂  is the tension at the bottom of the rope 1

T

₃ is the tension at the top of the rope 2

Now, if we add all equations from (1) to (4), we will get the value of F,

[tex] F-(m_{1}+m_{2}+2m_{r})g=(m_{1}+m_{2}+2m_{r})a[/tex]

a) Solving this equation for F:

[tex] F=(m_{1}+m_{2}+2m_{r})(a+g)[/tex]

[tex] F=(m_{1}+m_{2}+2m_{r})(a+g)[/tex]

[tex] F=32.0 N[/tex]

b) Using the equation (1), we can find T₁

[tex] T_{1}=F-m_{1}(g+a)[/tex]

[tex] T_{1}=19.2 N[/tex]

c) Let's use the equation (2) to find T₂

[tex] T_{2}=T_{1}-m_{r}(g+a) [/tex]

[tex] T_{2}= 16.0 N [/tex]

d) Using the equation (4) we can find T₃:

[tex] T_{3}=m_{r}(a+g) [/tex]  

[tex] T_{3}=3.2 N [/tex]  

Have a nice day!

Answer:a)8.01 m/s

Explanation:

Given

mass of ball [tex]m=0.9 kg[/tex]

initial speed [tex]u=9 m/s[/tex]

launch angle [tex]\theta =27 [/tex]

As the projectile reaches its highest point its vertical velocity component becomes zero and there will only be horizontal component

velocity at highest Point [tex]v=u\cos \theta [/tex]

[tex]v=9\cos 27[/tex]

[tex]v=8.01 m/s[/tex]

(b)maximum height h

Maximum height is given by

[tex]H_{max}=\frac{u^2\sin^2 \theta }{2g}[/tex]

[tex]H_{max}=\frac{9^2\sin^2 (27)}{2\times 9.8}[/tex]

[tex]H_{max}=0.85 m[/tex]

Final answer:

The speed of the ball at its highest point is its horizontal velocity component, calculated using the cosine of the angle. The height reached by the ball is found using the kinematic equation for vertical motion, considering the initial vertical velocity and the acceleration due to gravity.

Explanation:

When addressing the question of a 0.90-kg ball thrown at an upward angle, we are dealing with a two-dimensional projectile motion problem in physics. This type of problem can be broken down into horizontal and vertical components. Since gravity acts only in the vertical direction, it does not affect the horizontal velocity of the projectile.

(A) Speed at the highest point: The speed of the ball at its highest point is solely the horizontal component of its initial velocity because the vertical component will be zero at that point. The horizontal velocity (
vx) can be calculated using
vx =
v cos(
θ). So,
vx = 9.0 m/s cos(27°).

(B) Maximum height: To find the maximum height, we need to consider the vertical component of the velocity (
vy) and the acceleration due to gravity (
g), which is -9.81 m/s² (negative sign indicates the direction is opposite to the velocity). The initial vertical velocity (
vy) is
v sin(
θ), thus
vy = 9.0 m/s sin(27°). We can then use the kinematic equation
v2 = u2 + 2as to find the maximum height (
h), where u is the initial velocity, s is the displacement, and a is the acceleration. At the highest point, the final vertical velocity (
v) is 0 m/s. Rearranging the equation to solve for
s, we get
s = v2 / (2g).

Answer:

Acceleration, [tex]a=1.2\ m/s^2[/tex]

Explanation:

Given that,

The dogs of four-time Iditarod Trail Sled Dog Race champion Jeff King pull two 100-kg sleds that are connected by a rope, m = 100 kg

Force exerted by the doges on the rope attached to the front sled, F = 240 N

To find,

The acceleration of the sleds.

Solution,

Let a is the acceleration of the sleds. The product of mass and acceleration is called force. Its expression is given by :

F = ma

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

[tex]a=\dfrac{240\ N}{2\times 100\ kg}[/tex] (m = 2m)

[tex]a=1.2\ m/s^2[/tex]

So, the acceleration of the sleds is [tex]1.2\ m/s^2[/tex].

Answer:

A. Antibodies against rabies given to someone who was bitten by a potentially rabid dog

Explanation:

passive immunization is the immunity or protection against certain infectious diseases by injecting antigens or antibodies to the blood stream or certain antibodies can be gotten through colostrum or breast milk.

for option A. Antibodies against rabies given to someone who was bitten by a potentially rabid dog. the immunity against rabies infection is administer to the person

For option B:is only telling us the type of infection but not stating the immunity administered

option c can be fairly correct, because its another method of immunization but its not passive immunization

Answer:

The distance from the radio station is 0.28 light years away.

Solution:

As per the question:

Distance, d = 4 ly

Frequency of the radio station, f = 854 kHz = [tex]854\times 10^{3}\ Hz[/tex]

Power, P = 50 kW = [tex]50\times 10^{3}\ W[/tex]

[tex]I_{p} = 1\ photon/s/m^{2}[/tex]

Now,

From the relation:

P = nhf

where

n = no. of photons/second

h = Planck's constant

f = frequency

Now,

[tex]n = \frac{P}{hf} = \frac{50\times 10^{3}}{6.626\times 10^{- 34}\times 854\times 10^{3}} = 8.836\times 10^{31}\ photons/s[/tex]

Area of the sphere, A = [tex]4\pi r^{2}[/tex]

Now,

Suppose the distance from the radio station be 'r' from where the intensity of the photon is [tex]1\ photon/s/m^{2}[/tex]

[tex]I_{p} = \frac{n}{A} = \frac{n}{4\pi r^{2}}[/tex]

[tex]1 = \frac{8.836\times 10^{31}}{4\pi r^{2}}[/tex]

[tex]r = \sqrt{\frac{8.836\times 10^{31}}{4\pi}} = 2.65\times 10^{15}\ m[/tex]

Now,

We know that:

1 ly = [tex]9.4607\times 10^{15}\ m[/tex]

Thus

[tex]r = \frac{2.65\times 10^{15}}{9.4607\times 10^{15}} = 0.28\ ly[/tex]

Answer:

(A)  power  = 0.208 kW = 208 watts

(B)  energy = 6.6 x 10^{9} joules

Explanation:

energy consumed per day = 5 kWh

(a) find the power consumed in a day

         1 day = 24 hours

        power = \frac{energy}{time}

        power = \frac{5}{24}

          power  = 0.208 kW = 208 watts

(b) find the energy consumed in a year

    assuming it is not a leap year and number of days = 365 days

     1 year = 365 x 24 x 60 x 60 = 31,536,000 seconds

            energy = power x time

            energy = 208 x 31,536,000

            energy = 6.6 x 10^{9} joules

The average power consumption of an appliance that uses 5.00 kWh of energy per day is approximately 208.33 watts. In a year, this appliance consumes about 6.57 × 10^12 joules of energy.

The average power consumption of an appliance that uses 5.00 kWh of energy per day can be calculated as follows:

To convert kilowatt-hours to watts, we need to know that 1 kilowatt-hour equals to 1,000 watt-hours, and there are 24 hours in a day. Hence, 5.00 kWh is equal to 5,000 watt-hours. Therefore, the power consumption in watts is 5,000 watt-hours divided by 24 hours, yielding an average power consumption of approximately 208.33 watts.

To calculate the energy consumed in a year, we know that 1 kWh equals 3.6 million joules. Therefore, 5.00 kWh equals 18 million joules. Since there are 365 days in a year, the appliance uses 18 million joules per day times 365 days which equals 6.57 × 10^12 joules per year.

https://brainly.com/question/32435602

#SPJ3

The speed of the ping-pong ball must be 97.8 m/s

Explanation:

The kinetic energy of an object is the energy possessed by an object due to its motion. It is calculated as

[tex]E_k = \frac{1}{2}mv^2[/tex]

where

m is the mass of the object

v is its speed

Here we have a bowling ball that has

Mass: m = 7.29 kg

Speed: v = 1.73 m/s

So its kinetic energy is

[tex]E_k = \frac{1}{2}(7.29)(1.73)^2=10.9 J[/tex]

Now we want the ping-pong ball to have the same kinetic energy, so

[tex]E_k = 10.9 J[/tex]

its mass is

[tex]m=2.28 g = 2.28\cdot 10^{-3} kg[/tex]

So, we can find the speed it should have by re-arranging the equation:

[tex]v=\sqrt{\frac{2E_k}{m}}=\sqrt{\frac{2(10.9)}{2.28\cdot 10^{-3}}}=97.8 m/s[/tex]

Learn more about kinetic energy:

brainly.com/question/6536722

#LearnwithBrainly

Answer: False

Explanation:

Using the angular frequency formula derived from Hooke's law we have :

[tex]\omega =\sqrt{\frac{ k }{ m }} [/tex]

[tex]{\omega}^{ 2 }=\frac {k}{m}[/tex]  

where k- is Hooke's constant

           m- is mass attached to a spring

According to the formula the mass is inversely proportional to the square of the angular frequency angular  which means that increasing the mass attached to the spring will decrease the angular frequency.

The statement is false. Increasing the mass attached to a spring will decrease, not increase, the angular frequency of its vibrations due to the inverse proportional relationship between mass and angular frequency in a mass-spring system.

The statement, 'Increasing the mass attached to a spring will increase the angular frequency of its vibrations', is false. According to the principles of simple harmonic motion, the angular frequency of a mass-spring system fundamentally depends on the mass and the force constant (spring constant) of the system. However, the relationship is inversely proportional; meaning that increasing the mass will actually decrease the angular frequency. This is because the angular frequency (ω) is calculated as the square root of the ratio of the force constant (k) to the mass (m: ω = sqrt(k/m). Hence, increasing the mass causes a decrease in the angular frequency, which consequently increases the period of the motion - the time it takes for one complete cycle of vibration to pass a given point.

https://brainly.com/question/28208332

#SPJ11

The depth of the well can be calculated using the formula for gravitational potential energy, taking the work done to lift the bucket as equal to the gravitational potential energy gained by the bucket. This gives us the equation: Depth of the well (h) = Work done (W) / (mass (m) * acceleration due to gravity (g)), which we solve to find the depth.

The physics concept involved in this question is called gravitational potential energy, which refers to the energy an object possesses because of its higher position in a gravity field.

In such cases, the energy can be calculated using the formula for work, which is force times distance. When you're lifting an object, the force you're countering is the force of gravity on the object, which is its mass multiplied by the acceleration due to gravity (9.8 m/s^2). This amount of work is equivalent to the gravitational potential energy gained by the bucket when it is lifted.

So, the formula we'll use is: Work = mgh (mass * gravity * height)

We know the work done (5.92 kJ or 5920 J), the mass (25.9 kg) and the acceleration due to gravity (9.8 m/s^2). We want to find height (h), which in this context, means the depth of the well.

Rearranging the formula and solving for h gives us: h = Work / (m*g). By substituting the known values, h = 5920 J / (25.9 kg * 9.8 m/s^2).

By solving this, we get the depth of the well.

https://brainly.com/question/23134321

#SPJ11

Final answer:

The rod's kinetic energy at its lowest position is 1.26 J, calculated using the formula for rotational kinetic energy. The center of mass of the rod rises to a height of approximately 30.6 cm above the lowest point, using the principle of conservation of mechanical energy to equate potential and kinetic energies.

Explanation:

A thin rod acting as a pendulum is an example of physical principles related to rotational motion and conservation of energy. To find the rod's kinetic energy at its lowest position, we use the formula for rotational kinetic energy, K = (1/2)Iω2, where 'I' is the moment of inertia and 'ω' is the angular speed. For a rod rotating about one end, the moment of inertia, 'I', is given by (1/3)ml2, with 'm' being the mass of the rod and 'l' its length.

We can find the kinetic energy of the rod at its lowest position, where the angular speed is 4.0 rad/s: K = (1/2)Iω2 = (1/2)(1/3)(0.42 kg)(0.75 m)2(4.0 rad/s)2. After calculation, this gives K = 1.26 J (Joules).

To determine how far above the lowest position the center of mass rises, we have to consider the conservation of mechanical energy. At the highest point, all kinetic energy is converted into potential energy (assuming no energy losses), so we have mgh = K, where 'g' is the acceleration due to gravity, 'h' is the height gained, and 'm' is the mass of the rod. Therefore, h = K / (mg). Plugging in the values, we get h = 1.26 J / (0.42kg * 9.81 m/s2) = 0.306 m, or approximately 30.6 cm above the lowest position.

Answer:

It has the greatest apparent brightness of any star in this region of the sky.

Explanation:

We can conclude that Sirius is brighter than the other stars by the question saying "Larger dots represent brighter stars, and a few of the brightest stars are identified."

It can be viewed that it has the greatest apparent brightness of any star in this region of the sky.

The brightest star in the sky at night is Sirius. It gets its name from the Greek word for 'glowing' or 'scorching.'

Sirius is known as the Dog Star because it is the brightest star in the Canis Major constellation. It's extremely bright because it's one of the stars closest to our sun. The name could be derived from ancient Egypt.

This star map depicts the stars as seen from Earth, centered on the constellation Canis Major. The brighter stars are represented by larger dots, and a few of the brightest stars are identified.

It has the highest apparent brightness of any star in this region of the sky, as can be seen.

Thus, this can be concluded regarding Sirius.

For more details regarding Sirius, visit:

https://brainly.com/question/29388328

#SPJ6

Your question seems incomplete, the missing image is attached below:

Answer:

Explanation:

Given

Diameter of main rotor [tex]d_1=7.56 m[/tex]

Tail rotor [tex]d_2=1 m[/tex]

[tex]N_1=453 rev/min[/tex]

[tex]N_2=4137 rev/min[/tex]

[tex]\omega =\frac{2\pi N}{60}[/tex]

[tex]\omega _1=\frac{2\pi 453}{60}=47.44 rad/s[/tex]

[tex]\omega _2=\frac{2\pi 4137}{60}=433.28 rad/s[/tex]

Speed of the tip of main rotor[tex]=\omega _1\times r_1=47.44\times \frac{7.56}{2}=179.32 m/s[/tex]

Speed of tail rotor[tex]=\omega _2\times r_2=433.28\times \frac{1}{2}=216.64 m/s[/tex]

Answer:

[tex]0.0172rad/day=1.99x10^{-7}rad/second[/tex]

Explanation:

The definition of angular velocity is as follows:

[tex]\omega=2\pi f[/tex]

where [tex]\omega[/tex] is the angular velocity, and [tex]f[/tex] is the frequency.

Frequency can also be represented as:

[tex]f=\frac{1}{T}[/tex]

where [tex]T[/tex] is the period, (the time it takes to conclude a cycle)

with this, the angular velocity is:

[tex]\omega=\frac{2\pi}{T}[/tex]

The period T of rotation around the sun 365 days, thus, the angular velocity:

[tex]\omega=\frac{2\pi}{365days}=0.0172rad/day[/tex]

if we want the angular velocity in rad/second, we need to convert the 365 days to seconds:

Firt conveting to hous

[tex]365days(\frac{24hours}{1day} )=8760hours[/tex]

then to minutes

[tex]8760hours(\frac{60minutes}{1hour} )=525,600minutes[/tex]

and finally to seconds

[tex]525,600minutes(\frac{60seconds}{1minute})=31,536x10^3seconds[/tex]

thus, angular velocity in rad/second is:

[tex]\omega=\frac{2\pi}{31,536x10^3seconds}=1.99x10^{-7}rad/second[/tex]

Answer:

c. P₁/T₁=P₂/T₂

Explanation:

neither Avogadro’s, Charles’, or Boyle’s law formula can be used, since some parameters like volume is not given,

to find P₂, given P₁, T₁, and T₂ we will therefore use Gay-lussac's law.

gay lussacs law state that, provided volume is kept constant, pressure is directly proportional to temperature.

the volume volume is said to be filled, i.e its is kept constants when temperature is change

The intensity level in dB at a distance of 100 meters from the train is 98.46 dB.

To calculate the intensity level in dB at a distance of 100 meters from the train, we need to first calculate the intensity of sound at that distance.

Since the sound energy spreads out spherically, the intensity decreases with the square of the distance from the source.

Using the formula for intensity, I = P/4πr², where P is the acoustic power output and r is the distance from the source, we can calculate the intensity at 100 meters:

I = 100W / (4π * (100m)²) = 0.0796 W/m².

Now, we can use the formula for the intensity level in dB, β = 10log(I/I₀), where I₀ is the reference intensity (10⁻¹² W/m²).

Substituting the values, β = 10log(0.0796 / 10⁻¹²) = 98.46 dB.

https://brainly.com/question/15089336

#SPJ3

Answer:

[tex]P=1000000Pa=1MPa=1000kPa[/tex]

Explanation:

When the force that is applied is normally and uniformly distributed on a surface, the magnitude of the pressure is obtained by dividing the force applied on the corresponding area:

[tex]P=\frac{F}{A}[/tex]

Where:

[tex]P=Pressure\hspace{3}in\hspace{3}Pa.\\F=Force\hspace{3}in\hspace{3}N\\A=Area\hspace{3}in\hspace{3}m^2[/tex]

Converting cm to m:

[tex]10cm*\frac{1m}{100cm} = 0.1m[/tex]

The area of a square is:

[tex]A=l^2=(0.1)^2=0.01m^2[/tex]

Therefore:

[tex]P=\frac{1.00\times10^4}{0.01} =1000000Pa=1MPa=1000kPa[/tex]

Answer:

high real rate of interest,  depressing

Explanation:

If output is less than potential and the rate of policy has fall to the ground of zero, the subsequent decline in inflation results in high real rate of interest which further depressing output, causing inflation to even further decline.

If the actual output is less than potential output, demand or supply has fallen, resulting in job and output declines

Bio-gas is the naturally produced fossil fuel, a by-product when bacteria decompose organic material under anaerobic conditions.

Organic matter particularly waste material is broken down by bacteria through fermentation in an environmental condition without any presence of oxygen. This process of decomposition leads to formation of bio-gas with "carbon dioxide and methane" in a 2:3 ratio.

The above biological process is termed as bio-digestion or anaerobic digestion. Methane is flammable and thus bio-gas can be used as "energy source", a waste-to-energy transformation. The remaining decomposed matter is ideal as manure for plants due to its rich nutrient level.

Answer:

242 lts de fuel

Explanation:

We know density of fuel (is variable) but we can say that is close to 1 Kg/lts.

If we have 110 pounds over maximun certificated gross weight, we need to get rid of that 110 pounds  or 110 * 2.2  = 242 Kgs

Now    by rule of three

If     1 lt        weight      1   kg.

        x                          242 kgs

x  = 242 lts de fuel

To bring the aircraft within the maximum gross weight limits, approximately 18.33 gallons of fuel need to be drained, calculated by dividing the excess weight (110 pounds) by the weight of fuel per gallon (6 pounds/gallon).

To calculate how much fuel needs to be drained to bring an aircraft weight within the maximum certificated gross weight limits, we need to know two pieces of information: the weight by which the aircraft is over its maximum gross weight and the weight of the fuel that needs to be drained.

In this scenario, the aircraft is 110 pounds over the maximum certificated gross weight. In general, aviation gasoline (avgas) weighs about 6 pounds per gallon. To solve this problem, we will divide the excess weight by the weight of the fuel per gallon to find out how many gallons need to be drained.

So, the calculation is as follows:

Excess weight: 110 pounds.

Weight of fuel per gallon: 6 pounds/gallon.

Number of gallons to be drained = Excess weight / Weight of fuel per gallon.

Number of gallons to be drained = 110 pounds / 6 pounds/gallon.

Number of gallons to be drained = 18.33 gallons (approximately).

Therefore, to bring the aircraft back within weight limits, approximately 18.33 gallons of fuel need to be drained.

Answer:

In order from lowest urgency to highest, the sequence which properly ranks the product categories issued by the National Weather Service are as follows:

B- Outlook, Watch, Advisory, Warning.

Explanation:

An outlook for a hazardous weather describes the potential hazardous weather of concern in day 1 through 7. There are total two segments of the outlook, one for the marine zones and the second for the land based zones.  

A watch is issued when there is the possibility of hazardous weather within 48 hours, it does not guarantee that a hazardous weather is going to come, it just reminds the possibilities of any such weather to come.

Advisory comes third in the urgency ranking, we can explain this through an example: a winter weather advisory may be issued for amount of freezing rain or when there are chance of 2 to 4 inches of snow. And, in winter weather, an warning may be issued when there is one fourth inch or more of ice accumulation.

The National Weather Service orders their product categories based on urgency: Outlook, Watch, Advisory, and finally Warning. An outlook is prospective, a watch means conditions are favorable, an advisory means the event is likely, and a warning means the event is expected within 24 hours.

The National Weather Service issues their product categories in a sequence based on the impending urgency of the weather condition. The correct order from lowest to highest urgency is: Outlook, Watch, Advisory, and then Warning.

An Outlook is used when hazardous weather is possible over the next week. A Watch is used when conditions are favorable for a hazard to occur; it typically means there is a possibility of the occurrence within the next 48 hours. An Advisory is used when a hazardous event is occurring, imminent or likely, but it is considered less severe than a warning.

A Warning is issued when a hazardous weather event is occurring, imminent or has a very high probability of occurring; it typically means the event is expected within the next 24 hours. Therefore, the correct answer is B. Outlook, Watch, Advisory, Warning.

https://brainly.com/question/14035979

#SPJ12

Answer:

Hydrogen bonding

Ionic bonding

Non- induced dipole forces

Ion dipole forces

Van-der wall forces

Explanation:

Intermolecular forces are the forces which operates at molecular level they may be attractive or repulsive in nature. But the given question ask only about attractive molecular forces. These are of basically  five types:-

1. Hydrogen bonding- It is the force of attraction between hydrogen atom and an electro-negative atom.

2 .Ionic bonding- It is the force of attraction between cationic and anionic pair.

3.Non - Induced dipole forces- It is the dipole- dipole interaction between permanent electromagnetic materials.

4.Ion-dipole forces- These bonds are stronger than hydrogen bond and also stronger than dipole-dipole bond.

Van-der walls forces- It is the force of attraction between uncharged molecules.

Answer:

A.) A particle of water in a wave moves in a circular motion when viewed in cross section

Explanation:

Water waves are transverse waves. Waves transport energy, not water. As a wave crest passes, the water particles move in circular paths

The water particles don't move, they still end up in the place in which they began, the water particle moves up and down while the wave that passes through them moves in a perpendicular direction to the direction of the water particles moving up and down with respect to the crests and troughs of the wave (since water is a transverse wave). This will cause the wave to transverse in a circular path

The answer cannot be C because wavebase is equal to one-half the wavelength measured from still water level

Answer:

2.08335 hours

Explanation:

T = Time period = 12.5 h

Angular frequency is given by

[tex]\omega=\frac{2\pi}{T}\\\Rightarrow \omega=\frac{2\pi}{12.5}\\\Rightarrow \omega=0.50265\ rad/h[/tex]

The distance moved from highest to lowest level is given by

[tex]d=2x_{m}\\\Rightarrow x_m=\frac{d}{2}\\\Rightarrow x_m=0.5d[/tex]

At the ocean surface [tex]x_m=0.25d[/tex]

[tex]x_0=x_mcos(\omega t+\phi)[/tex]

[tex]\phi[/tex] = Phase constant = 0 as clock is started at [tex]x_0=x_m[/tex]

[tex]0.25d=0.5dcos(0.50265t)\\\Rightarrow cos(0.50265t)=\frac{0.25}{0.5}\\\Rightarrow 0.50265t=cos^{-1}0.5\\\Rightarrow t=\frac{1.047}{0.50265}\\\Rightarrow t=2.08335\ h[/tex]

The time taken for the water to fall the distance is 2.08335 hours

Answer:

The speed of cart is 5.5 m/s.

Explanation:

Given that,

Mass of cart = 100 kg

Distance = 3 m

Speed = 6 m/s

We need to calculate the speed of cart

Using relation of centripetal force and normal force

[tex]N+mg=\dfrac{mv^2}{r}[/tex]

[tex]\dfrac{m}{2}+mg=\dfrac{mv^2}{r}[/tex]

Put the value into the formula

[tex]\dfrac{1}{2}+9.8=\dfrac{v^2}{3}[/tex]

[tex]v=\sqrt{3(\dfrac{1}{2}+9.8)}[/tex]

[tex]v=5.5\ m/s[/tex]

Hence, The speed of cart is 5.5 m/s.

Final answer:

The speed of the cart at the top of the loop is 4.24 m/s.

Explanation:

In order to find the speed of the cart at the top of the loop, we can use the principle of conservation of mechanical energy. The total mechanical energy of the cart is the sum of its gravitational potential energy and its kinetic energy. At the top of the loop, the gravitational potential energy is zero, so the total mechanical energy is equal to the kinetic energy. The kinetic energy of the cart is given by the formula KE = 1/2 * m * v^2, where m is the mass of the cart and v is its velocity.

Given that the mass of the cart is 100 kg and the radius of the loop is 3 m, we can first find the centripetal acceleration at the top of the loop using the formula a = v^2 / r. Plugging in the values, we get a = (6 m/s)^2 / 3 m = 12 m/s^2. Since the force exerted by the track on the cart at the top of the loop is half the cart's mass, we can use this force to find the net force acting on the cart. The net force is equal to the centripetal force, which is given by F = m * a. Plugging in the values, we get F = (1/2 * m) * a = (1/2 * 100 kg) * 12 m/s^2 = 600 N.

Since the net force equals the centripetal force, we can equate it to the formula F = m * v^2 / r. Plugging in the values, we get 600 N = 100 kg * v^2 / 3 m. Solving for v, we get v^2 = 600 N * 3 m / 100 kg = 18 m^2/s^2. Taking the square root of both sides, we find that v = sqrt(18 m^2/s^2) = 4.24 m/s.

Answer:

26m/s

Explanation:

Assuming that the acceleration is constant, we can start by calculating the train speed when it's free of the congested area:

[tex]a = \frac{\deltav}{\deltat} = \frac{12 - 5}{8} = \frac{7}{8} = 0.875 m/s^2[/tex]

Then with the same acceleration we can find out the final speed:

[tex]v = v_0 + at = 12 + 0.875*16 = 26m/s[/tex]

Answer

A molecule with seesaw molecular geometry has a bond angle of 90° and 120°.

Seesaw is a type of molecular geometry where there are four bonds attached to a central atom.

Bond is observed in the shape of playground seesaw that is why it is known as a seesaw bond.

Four bonds attached to the central bond formed results as tetrahedral or square planar geometry.

In see-saw, shape maximizes the bond angle of the lone pair and the other atoms in the molecule.

lone pair in the equatorial position offer 120 and 90-degree bond angles whereas bond angle will be 90-degree bond angles if placed at axial position.

A molecule with seesaw molecular geometry has bond angles that are less than 120 degrees for equatorial positions and less than 90 degrees for axial positions, due to lone pair repulsion. Hence the correct option is 1.

Bond Angles in Seesaw Molecular Geometry

A molecule with a seesaw molecular geometry has four nuclei and one lone pair of electrons. This molecular structure is based on a trigonal bipyramidal geometry but with one equatorial position occupied by a lone pair. As a result, the bond angles are adjusted due to electron pair repulsion.

The bond angles for a seesaw geometry are:

The correct question is:

A molecule with a seesaw molecular geometry has a bond angle of

1. <120 for equatorial bonds and <90 for axial bonds.

2.180

3. <90

4. 120 for equatorial bonds and 90 for axial bonds.

5.120

Answer:

294.3 N

Explanation:

In this situation, we are told that the crate is not accelerating in the horizontal plane. But also it is not accelerating in the vertical plane. Meaning that the sum of all vertical forces add up to zero.

Fnet =  ma

Weight + Normal force = mass *  acceleration

-(30 kg * 9.81 m/s²) + Normal force = 30.0 kg * 0 m/s²

                                  Normal force = 294.3 N

The normal force exerted by the floor on the crate is equal to the weight of the crate when it's at rest. It can be calculated by multiplying mass and acceleration due to gravity. For a crate with a mass of 30.0 kg, the normal force would be 294 N.

The key to answering this question involves understanding how friction and forces work. In this scenario, the crate is not accelerating, so the forces acting on it are balanced, meaning the upward normal force equals the downward gravitational force. The normal force exerted by the floor on the crate is determined by the weight of the crate, which can be calculated using the formula for weight, W = mg (mass times gravity). Here, the mass m is 30.0 kg and the acceleration due to gravity g is 9.8 m/s².

So, we can substitute these values into the formula to find the weight: W = (30.0 kg) * (9.8 m/s²) = 294 N. This weight also equals the normal force since the crate is not moving vertically, so the normal force exerted by the floor on the crate is 294 N.

https://brainly.com/question/30436126

#SPJ3

Answer:

What happens inside a star while it expands into a sunlight is that It is fusing hydrogen into helium in a shell outside the core after which the fused hydrogen in the shell outside the core generates enough thermal pressure to push the upper layers outward.