The magnitudes of the vertical and horizontal components of a vector are 11 and 17 centimeters respectively. Find the magnitude of the vector and the angle from the horizontal axis.

Answer:

Single replacement

Explanation:

A single replacement reaction is a reaction in which the less reactive elements are replaced by the more reactive element in a compound. This is so because the more reactive element are higher in the electrochemical series element than the less reactive elements

The term is single replacement reaction in chemistry, where one element replaces another in a compound. An example is the reaction between zinc and copper sulfate, forming zinc sulfate and copper.

The process being referred to is known as a single replacement reaction or single displacement reaction in chemistry. A single replacement reaction involves one element displacing another element in a compound, resulting in a new element and a new compound. For example, the reaction between zinc and copper sulfate can be represented as Zn + CuSO4 → ZnSO4 + Cu, where zinc replaces copper in the compound copper sulfate to form zinc sulfate.

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Explanation:

From the Newton's  velocity of sound relationship , the velocity of sound is directly proportional to the square root of temperature .

In this case The velocity of sound = frequency x wavelength

= 798 x 0.48 = 383 m/sec

Suppose the temperature at this time = T K

Thus 383 ∝ [tex]\sqrt{T}[/tex]                       I

The velocity of sound is 329 m/s at 273 K ( given )

Thus 329 ∝ [tex]\sqrt{273}[/tex]                   II

Dividing I by II , we have

[tex]\frac{383}{329}[/tex] = [tex]\sqrt{\frac{T}{273} }[/tex]

or [tex]\frac{T}{273}[/tex] = 1.25

and T = 339.8 K  = 66.8° C

Answer:

D) 19.2 m/s

Explanation:

We can solve this problem by using the continuity equation: in fact, the flow rate a fluid through a pipe must remain constant.

Therefore, we can write:

[tex]A_1 v_1 = A_2 v_2[/tex]

where

[tex]A_1[/tex] is the cross-sectional area of the 1st section of the pipe

[tex]A_2[/tex] is the cross-sectional area of the 2nd section of the pipe

[tex]v_1[/tex] is the velocity of the water in section 1

[tex]v_2[/tex] is the velocity of the water in section 2

For the pipe in the problem we have:

[tex]d_1=9.6 cm = 0.096 m[/tex] is the diameter of the hose, so the area is

[tex]A_1=\pi (\frac{d_1}{2})^2[/tex]

[tex]d_2=2.5 cm = 0.025 m[/tex] is the diameter of the nozzle, so the area is

[tex]A_2=\pi (\frac{d_2}{2})^2[/tex]

[tex]v_1=1.3 m/s[/tex] is the velocity of water in the hose

Solving the equation for v2, we find the speed of water in the nozzle:

[tex]v_2=v_1\frac{A_1}{A_2}=v_1 \frac{d_1^2}{d_2^2}=(1.3)\frac{(0.096)^2}{(0.025)^2}=19.2 m/s[/tex]

Answer: Answer: First, You should try to think positive thoughts. Then, you should try and pinpoint your achievements. You often see your failures more than the success. Moreover, you should go check the impostor syndrome in ted ed. If you are trying to be more confident in your school choices than you should try to check the information again or try to go back and remember the time you studied the subject assignments you are doing.

Explanation: That other guy gave a great answer but can you still give a brainliest?

Answer:

Gravitational potential energy of the child = 4410 J.

Explanation:

Given data:

Mass of the child, [tex]m = 30 \ kg[/tex]

Mass of the child, [tex]h = 15 \ m[/tex]

The gravitational potential energy of the child at 15 m height can be given as,

[tex]GPE = mgh[/tex]

[tex]GPE = 30 \times 9.80 \times 15[/tex]

[tex]GPE = 4410 \ \rm J.[/tex]

The potential energy of the child is 4410J

POTENTIAL ENERGY:

P.E = mass (m) × gravitational force of the Earth (g) × height (h)

Where; g = 9.8m/s²

P.E = 30kg × 15m × 9.8m/s²

P.E = 4410Joules.

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Answer:

D.[tex]2.6g[/tex]

Explanation:

To find mass of object, you use the equation Density=Mass/Volume

Density=[tex]1.3g/cm^3[/tex]

Volume=[tex]2cm^3[/tex]

[tex]Mass=Density\ \times \ Volume\\=1.3g/cm^3\times2cm^3\\=2.6g[/tex]

The object's mass is 2.6g

The mass of the object is 2.6g. The correct answer is Option D.

You can use the formula for density to find the mass of the object:

Density (d) = Mass (m) / Volume (v)

Rearrange the formula to solve for mass:

Mass (m) = Density (d) x Volume (v), where d is the density, m is the mass, and v is the volume. Rearranging the equation, we have m = d * v. Plugging in the values given in the question, we get m = 1.3 g/cm3 * 2 cm3. Multiplying these values together, we find that the mass of the object is 2.6g.

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Therefore, the volume of the gas at temperature 100°C is 4.62L

Explanation:

Given-

Volume, V1 = 4L

Temperature, T1 = 50°C = 50 + 273K = 323K

Temperature, T2 = 100°C = 100 + 273K = 373K

Volume, V2 = ?

Using Charles law:

V1/T1 = V2/T2

4/323 = V2/373

V2 = 4.62L

Therefore, the volume of the gas at temperature 100°C is 4.62L

Answer:

1224km/hr

Explanation:

To convert from m/s to km/hr

1000m = 1km

Divide both sides by 1000

1m = 1/1000 km................. (1)

60×60 seconds = 1 hr

3600s = 1hr

Divide both sides by 3600

1s = 1/3600 .............(2)

Divide (2) by (1)

1m/s =  1/1000 ÷ 1/3600 km/hr

1m/s = 1/1000 × 3600/1  km/hr

1m/s = 3600/1000  km/hr

1m/s = 3.6 km/hr .............(3)

To convert 340m/s to km/hr

Multiply (3) by 340

1× 340m/s = 3.6 × 340 km/hr

340m/s = 1224km/hr

I hope this was helpful, please mark as brainliest

Answer:

1224 km/hr

Explanation:

recall that :

1km = 1000m

firstly lets convert m to km

340 m to km

340 / 1000

= 0.34 km

recall that :

1hr = 60 min

1 min = 60 seconds

hence 1 hr = 60*60

1 hr = 3600 seconds

1 second / 3600

=1/3600 hours

hence to get the answer you say :

[tex]\frac{0.34}{\frac{1}{3600} }[/tex]

recall : 1km = 1000m

recall: 1hr = 60 min

          1 min = 60 seconds

hence 1 hr = 60*60

1 hr = 3600 seconds

now to get this answer you have to divide m by 1000 to get km

and you have to divide seconds by 3600 to get hours

= [tex]\frac{340 / 1000}{1/3600}[/tex]

I can't decide what i'd prefer

I'd go both

Answer:

-22,150 N

Explanation:

When the youngster jumps off the platform, during the fall her initial potential energy is converted into kinetic energy, according to the law of conservation of energy. Therefore, we can write:

[tex]mgh=\frac{1}{2}mu^2[/tex]

where the term on the left is the potential energy while the term on the right is the kinetic energy, and where

m = 50.0 kg is the mass of the youngster

[tex]g=9.8 m/s^2[/tex] is the acceleration due to gravity

h = 1.00 m is the heigth of the platform

u is the speed of the youngster as she reaches the floor

Solving for u,

[tex]u=\sqrt{2gh}=\sqrt{2(9.8)(1.00)}=4.43 m/s[/tex]

Then, when the youngster hits the floor, the force exerted on her during the deceleration is given by:

[tex]F=\frac{\Delta p}{\Delta t}=\frac{m(v-u)}{\Delta t}[/tex]

where [tex]\Delta p[/tex] is her change in momentum, and where

m is the mass

v = 0 is the final velocity (she comes to a stop)

u = 4.43 m/s is the initial velocity

[tex]\Delta t=10.0 ms =0.010 s[/tex] is the duration of the collision

Substituting,

[tex]F=\frac{(50.0)(0-4.43)}{0.010}=-22150 N[/tex]

And the negative sign means the direction of the force is opposite to the motion (so, upward).

Answer:D: Precipitation please give brainliest

Explanation:  As liquid is heated by the sun's warmth, it changes into a gas form and rises in the atmosphere. In the air, water vapor cools and returns to a liquid form. ... These water droplets cling together and form clouds. When the droplets become heavy enough, they fall to the ground as precipitation.

Final answer:

Water droplets in clouds fall to Earth as precipitation (option D) when they become heavy enough. This precipitation can fall as rain, snow, sleet, or hail, depending on the air temperature.

Explanation:

When water droplets in clouds become heavy, they fall to Earth as precipitation (option D). This process occurs when water vapor in the atmosphere condenses into tiny droplets of liquid water, forming clouds. If these droplets accumulate enough mass, they can no longer be supported by the air currents in the cloud and fall to the ground as various forms of precipitation, depending on the temperature of the air. Warm air will usually cause the droplets to fall as rain, while cold air can lead to snow, sleet, or hail.

Answer:

4) 1 - mass; 5) 3 - Their masses and how far apart they are; 6) See the explanation below.

Explanation:

4)

The force of gravity between two bodies is defined by the following equation.

[tex]F_{g}=\frac{m_{1}*m_{2}*G}{d^{2}}\\ where:\\G = Universal gravitation constant = 6,674 *10^{-11} [N*m^2/kg^2] \\m_{1}= mass 1\\m_{2}= mass 2\\d = distance between the 2 bodies[/tex]

We can see that the gravity force depends on the masses and the distance between them.

5)

The gravity force depends on the masses and the distance between them.

[tex]F_{g}=\frac{m_{1}*m_{2}*G}{d^{2}}\\ where:\\G = Universal gravitation constant = 6,674 *10^{-11} [N*m^2/kg^2] \\m_{1}= mass 1\\m_{2}= mass 2\\d = distance between the 2 bodies[/tex]

6)

The heaviest object found at the bottom of the container is the copper block, since its density is the largest even larger than that of the liquid at the bottom.

The next block is the rubber one, we can see that it's floating over the corn syrup fluid. This is because the density of the rubber block is less than that of the corn syrup, so the block floats.

The next block is plastic, with a density of 1.17 (g/cm^3). This block is located between glycerin liquids and water.

The block on the surface of the container is wood, this density is 0.71[ g / cm^ 3] a density less than that of corn oil.

Answer:

828 Hz

Explanation:

The Doppler effect equation states:  

fr = (c + vr) / (c + vs) fs,  

where fr is the frequency heard by the receiver,  

c is the speed of sound,  

vr is the velocity of the receiver,  

vs is the velocity of the source,  

and fs is the frequency emitted at the source  

One important note: vr is positive if the receiver is moving towards the source, negative if away.  

Conversely, vs is positive if the receiver is moving away from the source, and negative if towards.

The ambulance is moving toward you, so vr is positive and vs is negative.

Plugging values into the equation:

fr = (343 m/s + 20 m/s) / (343 m/s − 20 m/s) (737 Hz)

fr = 828 Hz

As you would expect from the Doppler effect, you hear a higher frequency when the ambulance is moving toward you.

Answer:

2.334 m/s

Explanation:

From law of conservation of linear momentum, the sum of initial and final momentum are equal. Since momentum p=mv where m is mass and v is speed. The initial mass of 100 kg has momentum but lorry is at rest hence no momentum.

Initial momentum

100*600=60000 kg.m/s

Final momentum

Both lorry and 100 kg exert momentum hence total mass is 100+25600=25700 kg

25700v=60000

V=60000/25700=2.3346303501945525291828793774319066147859 m/s

Rounded off, final velocity is 2.334 m/s

Final answer:

The speed of the railroad freight car after the cannonball becomes embedded in the sand is 2.33 m/s, calculated using the law of conservation of momentum.

Explanation:

The question involves finding the speed of a railroad freight car after a cannon ball, flying in a horizontal direction, becomes embedded in the sand inside the car. This situation is governed by the law of conservation of momentum, which states that the total momentum of a system before an event must equal the total momentum after the event, assuming no external forces act on it. The initial momentum of the system is the product of the mass of the cannonball and its velocity. After the collision, the cannonball and the car move together, so their combined mass moves with a common velocity.

To solve this, the initial momentum (mass of the cannonball × its velocity) + (mass of the freight car × its initial velocity, which is zero since it's at rest) = the total mass of the system (cannonball + freight car) × the final velocity.

Substituting the given values, we have (100 kg × 600 m/s) + (25,600 kg × 0 m/s) = (25,700 kg) × final velocity. Simplifying, we find the final velocity = (60,000 kg·m/s) / 25,700 kg = 2.33 m/s.

Answer:

It increases asthma rates

Explanation:

The answer would be 18 W

The equivalent resistance of three resistors with values of 4.0 ohms, 6.0 ohms, and 8.0 ohms connected in series is 18.0 ohms.

The question asks for the equivalent resistance of three resistors connected in series with resistance values of 4.0 ohms, 6.0 ohms, and 8.0 ohms. When resistors are connected in series, the equivalent resistance (Requiv) is the sum of the individual resistances. The formula used is Requiv = R1 + R2 + R3.

Applying the given values:
Requiv = 4.0 Ω + 6.0 Ω + 8.0 Ω
Requiv = 18.0 Ω.

Therefore, the equivalent resistance of the three resistors connected in series is 18.0 ohms.

Answer:68m/s

Explanation:

Frequency=17Hz

Wavelength=4metre

Wave speed=frequency x wavelength

Wave speed =17 x 4

Wave speed =68m/s

A heavy object falls with the acceleration as a light object during free fall because:

Heavy things have a large gravitational force and also have less acceleration. So both the effects exactly cancel and make the falling objects to have the same acceleration irrespective of mass.

Free fall is a unique motion which has only gravitational force that acts on an object. Objects that undergo free fall experience only have the influence of gravity and not any other force.

So when we apply newton's second law of gravity which is:

           [tex]\text {acceleration}=\frac{\text {Force}}{\text {mass}}[/tex]

where,

F is the force

m is the mass

a is the acceleration

For example: When a 1000 kg elephant and a 1 kg rat fall from the same height,

The acceleration can be calculated as follows:

For elephant: F = 10000 N and m = 1000 kg. So,

           [tex]\text {acceleration}=\frac{10000}{1000}=10\ \mathrm{m} / \mathrm{s}^{2}[/tex]

For rat :  F = 10 N and m = 1 kg

Thus, [tex]\text {acceleration}=\frac{10}{1}=1\ \mathrm{m} / \mathrm{s}^{2}[/tex]

Hence, it shows that both the animals have the same acceleration irrespective of their mass.

Answer:

B. The number of protons.

Explanation:

Number of [tex]protons[/tex]  in the [tex]atomic\ nucleus.[/tex]

Protons are positively charged components of the atomic nucleus and it is what makes one element different from another.

Answer:

Endothermic reaction

Explanation:

If the reaction releases less energy than the energy needed to start the chemical reaction, then the reaction takes energy from the system. An endothermic reaction is a reaction that will takes energy from the system. Those energies will be put into the product of the reaction, make the product have higher potential energy than the reactant. The product of this reactant will be less stable since it's at a high energy state.

The type of chemical reaction where less energy is released than is required to initiate the reaction is called an endothermic reaction.

A chemical reaction that requires more energy to start than is released during the reaction is called an endothermic reaction. These reactions absorb energy from their surroundings, and the energy required to initiate the reaction is called the activation energy. Endothermic reactions have a net absorption of energy because the energy needed to break the bonds in the reactants is greater than the energy released from forming new bonds in the products. For example, photosynthesis is an endothermic reaction where the energy from sunlight is absorbed to convert carbon dioxide and water into glucose.

According to the law of reflection, When a ray of light passes from rarer medium to denser medium , it bends towards the normal. So, if there is a transparent material that is more dense than glass then the ray of light will bend towards the normal. The direction of light through the medium is predicted by Snell's Law. According to the Snell's law:

n₁ sin θ₁ = n₂ sin θ₂

Where n₁ is the refractive index of the first medium

n₂ is the refractive index of second medium.

θ₁ and θ₂ are the angle of incidence of light in medium 1 and medium 2

Answer:

a) Tc = 750 [N]  ;b) See the explanation below.

Explanation:

To solve this problem, we first need a graphical explanation of this, as well as knowing the corresponding questions. Therefore, a search was carried out in google, in the attached image we will find a graphical description of the problem.

b)

The solution of this type of problem corresponds to the use of Newton's third law, applying static which tells us that the sum of the forces in a system in equilibrium without movement must be equal to zero.

a)

In this way we can find by means of a sum of forces on the y axis equal to zero:

- 850 - 450 + 550 + Tc = 0

Tc = 750 [N]

Answer:

500m

Explanation:

See attachment below

Answer: 5

Explanation: There are 5 recognized dwarf planets in our solar system; Ceres, Pluto, Haumea, Makemake and Eris.

Answer:

5

Explanation:

There are only 5 dwarf planets that are officially recognized and they are Ceres, Pluto, Haumea, Makemake and Eris.

Answer:

C

Explanation:

Sound waves move perpendicular to the medium particles.

Answer:

its c for sure

Explanation:

Yo sup??

the 1st, 3rs and 4th statement are true because electromagnetic waves can travel large distances and electromagnetic waves are visible (only 400-700 nm wavelenght)

Hope this helps

Answer:

Vacuum

Explanation:

Sound energy as mechanical wave cannot be transmitted through a vacuum.

As a wave, which is a disturbance that transmits energy from one point to another, it requires a material medium for propagation.

Explanation:

When we apply the force on any body , the inertia comes into play . It is the tenancy of the the body to oppose the force which tends to change its state .

In first case the train tries to change its state from rest to motion . Thus the inertia of rest opposes this tendency.

In the second case , the train tries to come from motion to the state of rest . Thus again , inertia opposes it .

Therefore inertia is the factor which creates difficulty in both case . Hence option ( c ) is correct  

Answer:

[tex]1060.41kg/m^3[/tex]

Explanation:

Bulk modulus is defined as the relative change in the volume of a body produced by a unit of compressive acting uniformly over its surface:

[tex]B=\rho _o \frac{\bigtriangleup P }{\bigtriangleup \rho}[/tex]

Hence the density of the seawater at a depth of 680atm is calculated as:-

[tex]\rho=\rho_o +\bigtriangleup \rho=\rho_o(1+\frac{\bigtriangleup P}{B})\\\\=1030 \times (1+ \frac{(680-1)\times10^5}{2.3\times 10^9})\\=1060.41kg/m^3[/tex]