PLEASE HELP ASAP!!!!!!!!!!!!

Answer:

|v2| = 3.27

Explanation:

You have two vector v1 and v2. The relation between the magnitudes of both vectors is given by:

[tex]\frac{|v_1|}{|v_2|}=\frac{5}{2}[/tex]

Furthermore, the projection (the dot product) of one vector on the other one is given by the following formula:

[tex]v_1 \cdot v_2 = |v_1||v_2|cos\theta[/tex]

The dot product between v1 and v2 is 3√29. If you multiply the right hand side of the last equation by |v2|/|v2| you obtain:

[tex]3\sqrt{29}=\frac{|v_1|}{|v_2|}|v_2|^2cos(53\°)[/tex]

you do |v2| the subject of the formula:

[tex]|v_2|=\sqrt{\frac{|v_2|}{|v_1|}\frac{3\sqrt{29}}{cos53\°}}\\\\|v_2|=\sqrt{\frac{2}{5}\frac{3\sqrt{29}}{cos53\°}}=3.27[/tex]

Answer:

neither

Explanation:

they both suck :)

Have a great day

Answer:

Both of them

Explanation:

They are both better you can't choose because its like parents choosing who is their favorite child.

Answer:

1/ decreases

2/ yes;

In general there is no relationship, and any combinations of frequencies and amplitudes are allowed.

Explanation:

Explanation for 1/ - please see the picture attached below

Answer:

0.05 cents per fl oz

Explanation:

0.95 divided by 20

0.0475 to the nearest cent 0.05

Answer:1.96m

Explanation:

Work=4850J

Force=2470N

Distance =work ➗ force

Distance =4850 ➗ 2470

Distance =1.96m

Answer:

The answer is the atom with 3 protons, 4 neutrons, and 3 electrons.

Explanation:

The reason why, is because protons are positive, neutrons are neutral, and electrons are negative. The protons cancel out the electrons, and the neutrons are just there.

Answer:

The coin will reach the ground first.

Explanation:

Because feather's mass is very low in comparison to a coin and due to air present in earth's atmosphere it will come down slowly.

hope it helps!

Answer:

The coin

Explanation:

Because the coin is heavier than the feather

Answer:

a

Explanation:

Answer:

its a because its the only thing not moving

Explanation:

Answer:

C

Explanation:

15. 20

x4. x4

60. 80

80km/h

Answer:

80km/h

Explanation:

solution

given

d=20km

t=15min/60min=0.25h

s=?

s=d/t

s=20km/0.25h

s=80km/h

Answer:

Seed, Fruit, Leaves

Explanation:

Gymno, meaning bare, and sperm, meaning seed. Unlike other seed plants, gymnosperms do not have a protective fruit around their seeds. Most gymnosperms have needle-like or scale-like leaves.

A relatively tiny class of plants known as gymnosperms produce seeds and lack flowers. This means that unlike in a fruit, where the seeds are formed inside the reproductive structure, they are produced on the surface of the reproductive structure.

Gymnosperm can also be referred to by the less common word acrogymnospermae. It's a broad name for plants like conifers, ginkgo, cycads, and gnetophytes that you probably already know about. The word "gymnosperm" has Greek roots. The tube cell, the generative cell, and two prothallial cells make up the gymnosperm pollen grain's four cells.

Conifers make up the majority of the plant species in the gymnosperm family. In contrast to angiosperms, which produce flowers, gymnosperms create cones as their reproductive organs. Gymnosperms primarily consist of conifers, such as pine trees.

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6C

The quantity of charge, Q, passing through an electric circuit is dependent on the electric current, I, and the time taken, t, for the current to flow. It is given mathematically as follows

Q = I x t          ------------------------------(i)

Where;

I is measured in Amperes(A)

t is measured in seconds (s)

Q is measure in coulombs (C)

From the question,

I = 3A

t = 2s

Substitute these values into equation (i) as follows;

Q = 3 x 2

Q = 6C

Therefore, the number of coulombs of charge that will pass is 6C

Answer:

Explanation:

All the work done by the friction force results in a transfer of energy into thermal energy of the box-floor system. This thermal energy flows as heat within the box and floor, ultimately raising the temperature of both of these objects.

Answer: The period will be larger, with T = 4.92 seconds

Explanation:

The period of a pendulum can be obtained by the equation

T = 2*pi*√(L/g)

Where pi = 3.14, L = lenght of the pendulum and g = gravity acceleration.

You can see that the gravitational acceleration is on the denominator, this means that if we decrease the value of g, then the value of T will increase.

In Earth we have that:

2s = 2*3.14*√(L/9.8m/s^2)

L = (1/3.14)^2*9.8 m = 1m

In the moon we have g = 1.62 m/s^2

then the period in the moon is:

T = 2*3.14√(1/1.62) = 4.92s

Answer:

Generally, when thermal energy is transferred to a material, the motion of its particles speeds up and its temperature increases. There are three methods of thermal energy transfer: conduction, convection, and radiation. ... Convection transfers thermal energy through the movement of fluids or gases in circulation cells.Convection. When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along. This type of heat transfer is called convection. The fluid above a hot surface expands, becomes less dense, and rises.

Answer:

b

Explanation:

Answer:

b

Explanation:

trust

Answer:

united states

Explanation:

give brainiest please

Answer:

Electrons

Explanation:

Ionised atoms loose and gain electrons.

hope it helps!

Answer:

Explanation:

Samantha walks along a horizontal path in the direction shown the curved path is a semi circle with a radius of 2 m while the horizontal part is for me what is the magnitude of displacement

Displacement is given by the straight line distance between P and Q. Displacement will be length of straight line joining P and Q

a semi circle with a radius of 2 m

Length of this straight line=4+diameter

=4+(2*2)

=8 m

Answer:

1. Both are respiratory organs found in vertebrates.

2. Both enable the inhalation of oxygen and exhalation of carbon dioxide in the bodies of their host.

3. Respiratory membranes present in both make the exchange of gases easier.

4. Blood vessels found around them enable the breathing process.

Explanation:

Gills are respiratory organs which can be found in animals that live in water. These include fishes, amphibians like frogs, anthropods like insects, and annelids like worms. Gills are surrounded by respiratory  membranes known as gill lamellae which have a large surface area that makes breathing easier. Blood vessels also are found around gills.

The lung is also a respiratory organ found in humans. It runs from a windpipe known as the trachea and branches into bronchi which contain the bronchioles. Alveoli ducts contain alveoli sacs and then alveoli which are membranes that enable the breathing process.

Both are similar because they are respiratory organs found in animals with backbones. They are surrounded by blood vessels and membranes that make the breathing process easier.

Answer:

x = 265.5 m

Explanation:

To find the distance traveled by the car you first use the following formula:

[tex]v=v_o+at[/tex]   (1)

vo: initial velocity = 65.0m/s

a: acceleration = 15.0m/s^2

t: time = 3.00 s

you replace the values of vo, t and a in the equation (1) in order to calculate the final velocity v:

[tex]v=65.0m/s+15.0m/s^2(3.00s)[/tex] = 110 m/s

Next, you use the following formula:

[tex]v^2=v_o^2+2ax[/tex]

x: distance traveled

You do x the subject of the formula and replace the values of vo, v and a:

[tex]x=\frac{v^2-v_o^2}{2a}\\\\x=\frac{(110m/s)^2-(65.0m/s)^2}{2(15.0m/s^2)}=262.5\ m[/tex]

hence, the distance traveled by the car is 265.5 m

Answer:

Pretty sure it's density since its measuring a crowd - Option B :)

Explanation:

Answer:

4800

Explanation:

The change in velocity of the car is 17-13=4m/s. Since the change in momentum is the mass multiplied by the change in velocity, the answer is 4*1200=4800. Hope this helps!

Given:

Mass,

Change in velocity,

            =  4 m/s

Now,

The change in momentum is:

= [tex]Mass\times Change \ in \ velocity[/tex]

= [tex]1200\times 4[/tex]

= [tex]4800[/tex]

Thus the above answer is correct.

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Speed = Distance/Time

S = D/T

D = 0.9Km, T = 1.5hours,

S = 0.9/1.5

S = 0.6 m/s

hope it helps!

Answer: Speed =

distance = 0.9 * 1000 = 900 metres, because speed is measured in m/s so the km has to be converted to m

time = 1.5 * 60 = 90 seconds , because speed is measured in m/s so the time in minutes(m) has to be converted to seconds(s)

Speed =

          = 10m/s

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Explanation: I don't know what this is but this is what I found and I hope it's helpful

Answer:

dont know

Explanation:

need points

Answer:

a). la acelaración del automóvil es [tex]1.574x10^{-6}km/s^{2}[/tex]  

b). la distancia recorrida por el automóvil es [tex]1.59x10^{-3}km[/tex]

La aceleración puede ser encontrada por medio de la ecuación cinemática que corresponde a un movimiento rectilíneo uniformemente variado.

[tex]a = \frac{v_{2}-v_{1}}{t}[/tex] (1)

Donde [tex]v_{2}[/tex] es la velocidad final y [tex]v_{1}[/tex] es la velocidad inicial.

La velocidad inicial del automóvil sera cero ([tex]v_{1} = 0[/tex]) ya que parte del reposo.

Antes de remplazar los valores en la ecuación 1 es necesario expresar el tiempo en unidades de segundos.

[tex]t = 0.75min \cdot \frac{60s}{1min}[/tex] ⇒ [tex]45s[/tex]

La rapidez final puede ser expresada en unidades de [tex]km/s[/tex]:

[tex]v_{2} = 7.083x10^{-5}km/s[/tex]

[tex]a = \frac{7.083x10^{-5}km/s - 0km/s}{45s}[/tex]

[tex]a = 1.574x10^{-6}km/s^{2}[/tex]  

Por lo tanto, la acelaración del automóvil es [tex]1.574x10^{-6}km/s^{2}[/tex]  

Luego para calcular la distancia se puede utilizar la siguiente ecuación.

[tex]d = v_{1}t + \frac{1}{2}at^{2}[/tex] (2)

[tex]d = (0km/s)(45s) + \frac{1}{2}(1.574x10^{-6}km/s^{2})(45s)^{2}[/tex]

[tex]d = 1.59x10^{-3}km[/tex]

Por lo tanto, la distancia recorrida por el automóvil es [tex]1.59x10^{-3}km[/tex]  

Answer:

You know that catalysts lower the activation energy required for a reaction to occur. With the activation energy lower, the products can also combine more easily. Therefore, the forward and reverse reactions are both accelerated. It changes both rates and usually changes the equilibrium point.

Explanation:

hope it helps

Trees are being felled at an alarming rate by people. Forests are home to numerous animals and people, and by removing trees from them, we are destroying their habitat and depriving them of a safe haven.

Community conservation refers to a strategy for protecting the environment that acknowledges local residents' rights to manage wildlife or gain both direct and indirect benefits from it.

The gorillas' habitat, the forest, is being destroyed by humans. Additionally, people are harming these creatures, and if this continues, gorillas may become extinct.

There won't be as many resources from trees, like paper, if people cut down less of them, therefore prices could rise.

Prices for tourists will increase if fewer gorillas are still alive. That won't benefit visitors since they will have to pay more, and since some individuals don't have a lot of money, there will be fewer visitors.

Thus, this way, community conservation is mandatory.

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Answer:

11.44J/C

Explanation:

To find the electric potential for a point at 3m from one extreme of the bar you use the formula for the electric potential:

[tex]V=\int k\frac{dq}{r}=\int k\frac{dq}{x+3}[/tex]

Where r = x+3 represent the 3m distance of the charge to a point x in the bar.

dq: differential of charge = λdx. λ is the linear charge density.

k: Coulomb constant = 8.98*10^9 Nm^2/C^2

You can write dq as λdx. Furthermore, If you assume that the other extreme of the bar is at origin of the x-axis you can write the integral as follow:

[tex]V=\int_{0}^{2}k\frac{\lambda dx}{x+3}\\\\V=k\lambda \ ln(x+3)|_{0}^{2}=k\lambda (0.510)[/tex]

You replace λ ad k in the last expression:

[tex]V=(8.98*10^9Nm^2/C^2)(\frac{5*10^{-9}C}{2m})(0.510)=11.44\frac{J}{C}[/tex]

hence, the electric potential is 11.44J/C

Answer:

friction

...............

Answer:

Friction

Explanation:

Friction, air resistance, and tension are other examples of contact forces. Straight from the book. Please give branliest