can anyone help, i need help with this as well.

Answer:

[tex]14.98\ \text{kg m/s}[/tex]

[tex]45.26^{\circ}[/tex]

Explanation:

[tex]P_1[/tex] = Initial momentum of the pin = 13 kg m/s

[tex]P_i[/tex] = Initial momentum of the ball = 18 kg m/s

[tex]P_2[/tex] = Momentum of the ball after hit

[tex]55^{\circ}[/tex] = Angle ball makes with the horizontal after hitting the pin

[tex]\theta[/tex] = Angle the pin makes with the horizotal after getting hit by the ball

Momentum in the x direction

[tex]P_i=P_1\cos55^{\circ}+P_2\cos\theta\\\Rightarrow P_2\cos\theta=P_i-P_1\cos55^{\circ}\\\Rightarrow P_2\cos\theta=18-13\cos55^{\circ}\\\Rightarrow P_2\cos\theta=10.54\ \text{kg m/s}[/tex]

Momentum in the y direction

[tex]P_1\sin55=P_2\sin\theta\\\Rightarrow P_2\sin\theta=13\sin55^{\circ}\\\Rightarrow P_2\sin\theta=10.64\ \text{kg m/s}[/tex]

[tex](P_2\cos\theta)^2+(P_2\sin\theta)^2=P_2^2\\\Rightarrow P_2=\sqrt{10.54^2+10.64^2}\\\Rightarrow P_2=14.98\ \text{kg m/s}[/tex]

The pin's resultant velocity is [tex]14.98\ \text{kg m/s}[/tex]

[tex]P_2\sin\theta=10.64\\\Rightarrow \theta=sin^{-1}\dfrac{10.64}{14.98}\\\Rightarrow \theta=45.26^{\circ}[/tex]

The pin's resultant direction is [tex]45.26^{\circ}[/tex] below the horizontal or to the right.

The megnitude and the direction of the resultant velocity of the pin willl be 14.98 Kgm/sec and 45.26° below the horizontal or to the right.

The momentum is defined as the product of mass and the velocity of the body. It is denoted by the letter P. It occurs due to the applied force. Its unit is Kg m/s².

The given data in the problem is;

P₁ is the initial momentum of the pin = 13 kg m/s

[tex]\rm p_i[/tex]  is the initial momentum of the ball = 18 kg m/s

P₂ is the momentum of the ball after hit

[tex]\rm \theta[/tex]  is the angle the pin makes with the horizotal after getting hit by the ball

Momentum in x direction;

[tex]\rm P_i= P_1 cos \theta + P_2 cos \theta \\\\ P_2cos \theta = P_i -P_i cos 55^0 \\\\ P_2cos \theta = 10.54 \ Kgm/s[/tex]

Momentum in y direction;

[tex]\rm P_i sin\theta = P_2 sin\theta \\\\ P_2 sin\theta =13 sin 15^0 \\\\ P_2 sin\theta =10.64 \ kgm/sec[/tex]

[tex](P_2 cos \theta )^2 + (P_2 sin \theta)^2 = P_2^2 \\\\ \rm P_2 = \sqrt{(10.54)^} +(10.64)^2[/tex]

[tex]\rm P_2 = 14.98 \ kgm/sec[/tex]

The  direction of the resulatnt velocity is find as;

[tex]P_2 sin\theta = 10.64 \\\\ \theta = sin^{-1 } \frac{10.64}{14.98} \\\\ \theta=45.26^0[/tex]

Hence the megnitude and the direction of the resultant velocity of the pin willl be 14.98 Kgm/sec and 45.26° below the horizontal or to the right.

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Answer:

The latent heat of vaporization of water is 2.4 kJ/g

Explanation:

The given readings are;

The first (mass) balance reading (of the water) in grams, m₁ = 581 g

The second (mass) balance reading (of the water) in grams, m₂ = 526 g

The first joulemeter reading in kilojoules (kJ), Q₁ = 195 kJ

The second joulemeter reading in kilojoules (kJ), Q₂ = 327 kJ

The latent heat of vaporization = The heat required to evaporate a given mass water at constant temperature

Based on the measurements, we have;

The latent heat of vaporization = ΔQ/Δm

∴ The latent heat of vaporization of water = (327 kJ - 195 kJ)/(581 g - 526 g) = 2.4 kJ/g

The latent heat of vaporization of water = 2.4 kJ/g

Answer:

See the answers below.

Explanation:

Momentum is defined as the product of mass by velocity, and can be calculated by means of the following expression.

[tex]P=m*v[/tex]

where:

P = Momentum [kg*m/s]

m = mass = 10 [g] = 0.01 [kg]

v = velocity = 400 [m/s]

i)

[tex]P=0.01*400\\P=4[kg*m/s][/tex]

ii)

The momentum of the gun is equal to zero, because it does not move before being fired, the weapon only moves after having fired the weapon.

[tex]P_{gun}=0[/tex]

iii)

Since the momentum is conserved before and after the shot, the same momentum given to the bullet is equal to the momentum received by the gun.

[tex]P=m*v_{recoil}[/tex]

[tex]v_{recoil}=P/m\\v_{recoil}= 4/2\\v_{recoil}=2[m/s][/tex]

Answer:

Distance = displacement = 35m

Explanation:

The distance of the student is how far he has gone.

Distance = 25m + 10m

Distance = 35m

Displacement is the distance specified in specific direction. Since the student walk in the sane direction, thence the displacement is also 35m

Answer: The correct option is C (The committee who insures ethical treatment of research participants)

Explanation:

The institute Review Board ( IRB) is a committee that reviews research that involves human beings and approves it once it's of ethical standard. This committee is usually made up of scholars that arefrom various departments who are mandated to review proposals to ensure that they comply with ethical guidelines and write a summary of proposed risks to subjects.

The primary importance of institute Review board is to protect the rights and welfare of human research subjects and to ensure that appropriate steps are taken to protect the rights and welfare of humans participating as subjects in the research, both in advance and by periodic review,

Answer:

100kgm/s

Step by step solution:

mass(m) = 5kg

Initial velocity (u) = 0

i.e u = 0 for free fall

Final velocity (v) = 20m/s

Momentum = m(v - u)

= 5(20 - 0)

= 5(20) = 100kgm/s.

Answer:

[tex]\boxed {\boxed {\sf 100 \ kg*m/s}}[/tex]

Explanation:

Momentum can be found using the following formula.

[tex]p=mv[/tex]

where p is the momentum, m is the mass, and v is the velocity.

1. Define Variables

The mass is 5 kilograms and the velocity is 20 meters per second.

[tex]m= 5 \ kg \\v= 20 \ m/s[/tex]

2. Calculate Momentum

Substitute the values into the formula.

[tex]p= 5 \ kg * 20 \ m/s[/tex]

Multiply.

[tex]p= 100 \ kg*m/s[/tex]

The momentum of the ball is 100 kilograms meters per second.

In position A

The mirror has to be observed in the ray reflected from the mirror.

Since the the angle of reflection is equal to the angle of incidence, the reflected ray must be in equal path as the incident ray.

That phenomenon is only in diagram A

Answer:

Without food your not able to produce energy thats why you cannot work so long

Answer:

remains the same

Explanation:

Momentum refers to the quantity of motion of a body. When any body of mass moves, it possess momentum. Numerically,

Momentum =  mass x velocity

i.e. momentum is the product of the mass x velocity

Momentum of a body is always conserved.

In the context, the skateboard has certain momentum before Freddy lands on it. After Freddy lands, the momentum of skateboard remains the same, there is no change in the momentum.

This is because, here the momentum is conserved. After Freddy lands on the skateboard, the total mass on the skateboard increases and so the velocity decreases making the momentum same before the landing.

Answer:

[tex]46620\ \text{N}[/tex]

Explanation:

m = Mass of roller coaster = 2000 kg

r = Radius of loop = 24 m

v = Velocity of roller coaster = 18 m/s

g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]

Normal force at the point will be

[tex]N-mg=\dfrac{mv^2}{r}\\\Rightarrow N=\dfrac{mv^2}{r}+mg\\\Rightarrow N=\dfrac{2000\times 18^2}{24}+2000\times 9.81\\\Rightarrow N=46620\ \text{N}[/tex]

The force exerted on the track is [tex]46620\ \text{N}[/tex].

Answer:

I think it's the 3rd one

If someone tells u somethin else, go for it cause im not 100% sure...

what is meaning of forages

It reduces labor as long as there is a good supply of grasses. Therefore, option B is correct.

Ruminants are unique animals that are classified as such. This indicates that their stomach has four distinct components and is particularly built. The several compartments aid in the digestion of the lignin and cellulose found in the plants they consume. The energy can be converted by cattle in a way that is not possible for humans.

Numerous additional by-products from cattle are also available to us. These include sections of the cow that are utilized to create goods for the house, body, food, and industry. Other than beef, byproducts are goods with added value that come from cattle.

The claim that land for beef cattle may be used for other crops for human use is one that is frequently made. This is not totally accurate, though, as beef cattle live a large portion of their lives on forage-based systems. If not utilized for grazing, forages are often cultivated on land that is unsuitable for other high-value crops and would be regarded as a land of marginal use.

Thus, option B is correct.

Learn more about beef production, here:

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Answer:

???????????????? Tell me also

Answer:

Area is inversely proportional to pressure.

Explanation:

✍ Lesser the area, higher the pressure.

✍ More the area, lower the pressure.

Thank You

Answer:

the center of the earth

Answer:

F = 1200 [N]

Explanation:

Torque is defined as the product of force by Radius.

[tex]T=F*r[/tex]

where:

T = torque = 300 [N*m]

r = radius = 50/2 = 25 [cm] = 0.25 [m]

[tex]F=T/r\\F = 300/0.25\\F = 1200 [N][/tex]

Answer:

Explanation:

Electromagnetic waves are formed by the interference of both electric and magnetic fields. These include: Microwaves, Radio waves, Infrared, Visible, Ultraviolet, X-ray, and gamma rays. These waves can be arranged in a specific order (called spectrum) with respect to their wavelength or frequency. The higher the wavelength, the lower the frequency. And vice versa.

These waves are transverse, and travels at the same speed (speed of light - 3.0 x [tex]10^{8}[/tex] m/s).

In the given question, the answers are:

1 - Magnetic

2 - Region

3 - Refractive indices

4 - Greater

5 - Higher

6 - Wavelength

Answer:

5 cm

Explanation:

Answer:

See the answers below.

Explanation:

We must apply the definition of density which is the ratio of mass to volume.

[tex]Ro=m/v[/tex]

where:

Ro = density = 2560 [kg/m³]

m = mass [kg]

v = volume [m³]

With the column height data and column radius we can calculate the volume, since it resembles the volume of a cylinder. In this way the volume of a cylinder is defined by the following expression.

[tex]V=\pi *r^{2}*h[/tex]

where:

r = radius = 45 [cm] = 0.45 [m]

h = height = 2.72 [m]

[tex]V = \pi *(0.45)^{2}*2.72 \\V = 1.73 [m^{3} ][/tex]

a)

The mass can be calculated as follows.

[tex]m=Ro*V\\m=2560*1.73\\m= 4428.8 [kg][/tex]

ii)

Pressure is defined as the relationship of force over an area.

The area can be calculated with the radius of the cylinder.

[tex]A=\pi *r^{2}\\A = \pi *(0.45)^{2}\\A = 0.636 [m^{2} ][/tex]

Therefore

[tex]P=F/A\\where:\\F=m*g\\F=4428.8*9.81\\F=43446.53[N][/tex]

[tex]P=43446.53/0.636\\P=68312.15[Pa]\\P=68.31[kPa][/tex]

iii)

If the pressure is very large we must analyze the pressure equation again.

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

We can see that the pressure depends on the strength (weight) and the area of the column. In this way if we increase the value of the area (denominator) we see that the pressure decreases.

If the new Radius is 50 [cm] = 0.5 [m]

[tex]A=\pi *(0.5)^{2}\\A = 0.785 [m^{2} ][/tex]

Now we can calculate again the pressure.

[tex]P=43446.53/0.785\\P=55317.84[Pa]=55.32[kPa][/tex]

We can see the reduction in pressure.

A cheap effective and simple way to help the body recover is to get adequate amounts of sleep, as our body need rest to reduce the tiredness and physical as well as mental stress in our human system.

Exercise is the activity that includes the physical movements of the body and results in fitness, wellness, and healthiness of the person to protect and lower the risks of getting diseases. It allows the person to maintain a healthy weight.

Getting enough sleep is an easy, affordable technique to aid in the body's recovery. Resting our bodies helps our minds and bodies recuperate from fatigue and physical and emotional stress.

Thus, an adequate amount of sleep is one of the effective ways to help the body recover.

To learn more about exercise from here, refer to the link;

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Answer:

Definition: poem

Explanation:

Answer: 20 N

Explanation: Net force is the sum of all forces acting on an object. For example, in a tag of war, when one team is pulling the tag with a force of 100 N and the other with 80 N, the net force would be 20 N at the direction of the first team (100 N - 80 N = 20 N).

Answer:

The kinetic energy before the collision was 8 J

Explanation:

The given parameters are;

The mass of the metal ball at rest, m₁ = 3.0 kg

The velocity of the ball at rest = 0 m/s

The mass of the metal ball that hits the one at rest, m₂ = 1.0 kg

The velocity of the metal ball that hits the one at rest, v₂ = 4.0 m/s

The velocity with which the 3.0 kg ball moves forward = 2.0 m/s

The velocity with which the 1.0 kg ball bounces back = 2.0 m/s

a) Kinetic energy, K.E. = 1/2 × m × v²

Where;

m = The mass of the of the object in motion

v = The velocity of the object

Before the collision, we have;

Initial K.E. = 1/2 × m₁ × v₁² + 1/2 × m₂ × v₂²

∴ Initial K.E. = 1/2 × 3.0 kg × (0 m/s)² + 1/2 × 1.0 kg × (4.0 m/s) ² = 8 J

The kinetic energy before the collision = The initial K.E. = 8 J.

Answer:

9653.04 joules

Explanation:

H= 8.2 m

M= 120 kg

G= 9.81 m/s^2

P.E= ?

P.E = MGH

P.E = 120 x 9.81 x 8.2

P.E = 9653.04 joules

Answer:1020

Explanation:

Answer:

Yet Yeet and Yeeeeeet

Explanation:

Answer: 2

Explanation:

From the question, we are informed that the distance of a force arm (FA) is 4 feet and the resistance arm (RA) is 2 feet.

Based on the information given, the mechanical advantage would be calculated as:

= Force Arm / Resistance Arm

= 4 feet / 2 feet

= 2

Answer:

i think ii)

B and c

i'm note sure though

Answer:

P = 4000 [Pa]

Explanation:

Pressure is defined as the relationship between Force and the area where the body rests.

The support area is equal to:

[tex]A=50*20=1000[cm^{2} ][/tex]

But we must convert from square centimeters to square meters.

[tex]1000[cm^{2}]*\frac{1^{2}m^{2} }{100^{2}m^{2} }=0.1[m^{2} ][/tex]

And the pressure is:

[tex]P=\frac{F}{A} \\P=400/0.1\\P=4000[N/m^{2} ]or 4000[Pa][/tex]

Answer:

4kPa

Explanation:

P = force/area

= 400/(0.5×0.2)

= 4000Pa(4kPa)

Answer:

4000pascal

Explanation:preassure = force/area

F = 400N

A = 50cmx 20cm = 1000 cm sq

so we have to convert the area in metre square

so when convert we get the answer 1/10 = 0.1m square

now as per the equation of preassure we have to divide 0.1/400

and then we get the answer 4000pascal.