The water-balloon weighs 4.9 N. gravitational field strength = 9.8 N/kg Calculate the mass of the water-balloon

Answer:

E∝A²

Energy varies as square of change in amplitude

If amplitude of 1 has energy of 2

Amplitude of 2 (double of 1) = (2x2)=4x2=8  4 times the energy at amplitude of 1.

For 8 units of amplitude change

8x8=64x2= 128  or C:

Explanation:

When the amplitude of the wave is 8 units, the corresponding energy of the wave is 128 units.

The given parameters;

The energy of a string at  a given amplitude is calculated as follows;

[tex]E = \frac{1}{2} kA^2\\\\\frac{E}{A^2} = \frac{E_1}{A_1^2}[/tex]

When the amplitude is 8, the energy of the wave is calculated as follows;

[tex]\frac{2}{1^2} = \frac{E_2}{8^2} \\\\E_2 = 2(8^2)\\\\E_2 = 2(64)\\\\E_2 = 128 \ units[/tex]

Thus, when the amplitude of the wave is 8 units, the corresponding energy of the wave is 128 units.

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Answer:

a is correct

The particles will move up and down over large areas.

Answer:

B. The particles will move up and down over small areas.

Explanation:

I just took the quiz and got 100% :)

Answer:

Petroleum

Explanation:

Because Petroleum reservoirs can be depleted but something like wind energy wind will always be there

Answer: Petroleum

Explanation: Have a Good day!!

Answer:

By putting something like a sheet of glass in the water.

Explanation:

Putting a sheet of glass in the water will make the ripples move slower because the speed of a wave depends on the depth of water.

Ultraviolet (UV) "light" is a type of electromagnetic radiation. UV light has a shorter wavelength than visible light. ... The wavelength of violet light is around 400 nanometers (or 4,000 Å). Ultraviolet radiation oscillates at rates between about 800 terahertz (THz or 1012 hertz) and 30,000 THz.

If you're starting at the lowest frequency that our eyes can see, you're at RED light.  

Then, as you hike through higher and higher frequencies, you travel through orange light, yellow light, green light, blue light, violet light.

Suddenly, as you keep going to higher frequency, you can't see the light any more. You've crossed the line from violet to ULTRAviolet. Now your eyes don't know it's there.  The frequency is too high. (Wavelength is too short.)

Answer:

First law: kinetic energy is used to turn an electric generator

Second law: some thermal energy is lost to the environment as it travels through the system

Explanation:

The first law of thermodynamics is known as the law of conservation of energy. It states that energy can neither be created nor destroyed but can only be transferred or changed from one form to another. When thermal energy is used to generate electricity, the kinetic energy of the steam is used to turn the electric generator (thereby producing electrical energy).

The second law of thermodynamics states that energy transfer or transformation leads to an increase in entropy resulting in the loss of energy. This law also states that as energy is transferred or transformed, some is lost in a form that is unusable. When thermal energy is used to generate electricity, some of the thermal energy is lost to the environment as it travels through the system.

Answer:

NOT A

Explanation:

Sorry I couldn't guess it right. Source EDGEN

Answer:

Radioactive Decay

Explanation:

Answer:

The cells of each contain exactly the same parts.​

Explanation:

Three different organisms are involved in this question viz: pollen, bee and flowering plant. According to the question, they are all living organisms, which means that they all contain one or more cells.

Although they all have cells but the cells of each does not contain exactly the same parts.​ Bee is an animal while pollen produced by the flowering plants are plants, hence, the parts/organelles contained in each cell of the mentioned organisms are mentioned.

Answer:

2.66secs

Explanation:

To get the time it will take to reach the ground, we will use the equation of motion;

S = ut + 1/2at²

S is the distance

u is the initial velocity

g is the acceleration due to gravity

Given

S = 30m

u = 0m/s

Let's get the acceleration

According to newton's second law;

[tex]\F_x = ma_x\\F_m - F_f = ma_x\\mgsin \theta - 0 = ma_x\\gsin\theta = a_x\\a_x = 9.8sin 60\\a_x = 9.8(0.8660)\\a_x = 8.49m/s^2[/tex]

Get the required time:

Recall that: S = ut + 1/2at²

Substitute the given parameters and find t

30 = 0(t) + 1/2(8.49)t²

30 = 4.24t²

t² = 30/4.24

t² = 7.08

t = √7.08

t = 2.66secs

Hence it take the box 2.66seconds to reach the ground

Answer:

1. result

2.strengths

3. power

4. target heartbeat

5. visualize it

6. mindfulness

7. effort and practice

tried my best not sure if #3 #5 and #7 is correct but I tried. How is it?

Answer:

i think its....A

Explanation:

Answer: Electromagnetic waves can transfer energy through empty space.

Explanation:

Electromagnetic waves are formed when an electric field comes in contact with a magnetic field. The electric field and magnetic field of an electromagnetic wave are perpendicular to each other. They are also perpendicular to the direction of the wave.

Electromagnetic waves travel with speed of light in vacuum.

Electromagnetic wave does not need a medium to propagate or travel from one place to another. Electromagnetic waves are 'transverse' waves which means that they are measured by their amplitude and wavelength.

Electromagnetic waves do not lose energy when they travel and thus can travel far from its source.

Answer:

C.

Electromagnetic waves can transfer energy through empty space.

Explanation:

cause i dont need one

Answer:

39850.785 J

Explanation:

0.5 x m x v^2

0.5x13x78.3^2

Answer:

KE =

[tex] \frac{1}{2} m {v}^{2} \\ [/tex]

Explanation:

[tex]ke = \frac{1}{2} m {v}^{2} \\ = \frac{1}{2} \times 13 \times {78 . 3}^{2} \\ ke = 39850.785j \\ [/tex]

Answer:

1 mole = 767.882 g

1 gram = 0.001 mole

Explanation:

The molar mass of CeAl₁₂O₁₉ is 770.686grams. The molar mass of a substance is the amount of substance which is present in one mole of the compound.

Molar mass of a substance is the mass in grams of one mole of the compound or chemical substance. In a chemical substance, the amount of entities which are present such as atoms, molecules, ions, is defined as a mole. A mole of any substance has 6.022 × 1023 molecules in it.

The molar mass of CeAl₁₂O₁₉  can be calculated as it is made up of three atoms which are Ce (Cerium), twelve atoms of Aluminium (Al), and nineteen atoms of O (Oxygen).

Atomic mass of Cerium = 140.116u

Atomic mass of Aluminium = 26.981539 u

The mass of 12 Aluminium atoms = 12 × 26.98 u

The mass of 12 Aluminium atoms = 323.76 u

Atomic mass of Oxygen =  15.999 u

The mass of 19 atoms of Oxygen = 303.81 u

Therefore, the mass of CeAl₁₂O₁₉ = 140.116 u + 323.76 u + 303.81 u

The molar mass of CeAl₁₂O₁₉ is 770.686 grams.

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Answer:

Hi... Your answer is impulse

Answer:

The correct option is;

Still constant

Explanation:

The relative refractive index ₁n₂ between the two medium can be as follows;

[tex]_1n_2 = \dfrac{The \ speed \ of \ light \ in \ medium \ 1}{The \ speed \ of \ light \ in \ medium \ 2} = \dfrac{c_1}{c_2}[/tex]

Therefore, given that the speed of light in medium 1 is constant and the speed of light on medium 2 is also constant, the relative refractive index ₁n₂ = c₁/c₂ is always constant.

Answer:

58.8m

Explanation:

Analyzing two-dimensional projectile motion is done by breaking it into two motions: along the horizontal and vertical axes.

hope it helps!!

Answer:

up and down

Explanation:

this is because they do have the correct flagellum to move to the left and to the right

Answer:

mgh = GPE

Explanation:

2.3×3.25

7.475J

Answer:

No not at all

Explanation:

Answer:

Hard-boiled eggs don't react well (or, depending on the perspective, react extremely well) to microwaves. Heat one up in a microwave and — assuming it doesn't burst

so yeah it does not explode

Answer:

18 m

Explanation:

G = Gravitational constant

m = Mass of planet = [tex]\rho V[/tex]

[tex]\rho[/tex] = Density of planet

V = Volume of planet assuming it is a sphere = [tex]\dfrac{4}{3}\pi r^3[/tex]

r = Radius of planet

Acceleration due to gravity on a planet is given by

[tex]g=\dfrac{Gm}{r^2}\\\Rightarrow g=\dfrac{G\rho V}{r^2}\\\Rightarrow g=\dfrac{G\rho \dfrac{4}{3}\pi r^3}{r^2}\\\Rightarrow g=\dfrac{4G\rho\pi r}{3}[/tex]

So,

[tex]g\propto \rho r[/tex]

Density of other planet = [tex]\rho_p=\dfrac{1}{4}\rho_e[/tex]

Radius of other planet = [tex]r_p=\dfrac{1}{3}r_e[/tex]

[tex]\dfrac{g_e}{g_p}=\dfrac{\rho_e r_e}{\rho_p r_p}\\\Rightarrow \dfrac{g_e}{g_p}=\dfrac{\rho_e r_e}{\dfrac{1}{4}\rho_e\times \dfrac{1}{3}r_e}\\\Rightarrow \dfrac{g_e}{g_p}=12\\\Rightarrow g_p=\dfrac{g_e}{12}\\\Rightarrow g_p=\dfrac{9.8}{12}[/tex]

Since the person is jumping up the acceleration due to gravity will be negative.

From kinematic equations we have

[tex]v^2-u^2=2g_es\\\Rightarrow u^2=v^2-2g_es\\\Rightarrow u^2=0-2\times -9.8\times 1.5\\\Rightarrow u^2=2\times 9.8\times 1.5[/tex]

On the other planet

[tex]v^2-u^2=2g_ps\\\Rightarrow s=\dfrac{v^2-u^2}{2g_p}\\\Rightarrow s=\dfrac{0-(2\times 9.8\times 1.5)}{2\times -\dfrac{9.8}{12}}\\\Rightarrow s=18\ \text{m}[/tex]

The man can jump a height of 18 m on the other planet.

Answer:

v=68[m/s]

Explanation:

To solve this problem we have to use the law of energy conservation, which tells us that potential energy is converted into kinetic energy.

[tex]E_{pot}=E_{kin}[/tex]

[tex]E_{pot}=m*g*h[/tex]

[tex]E_{kin}=0.5*m*v^{2}[/tex]

where:

m = mass [kg]

g = gravity acceleration = 9.81 [m/s²]

h = elevation = 236 [m]

v = velocity [m/s]

[tex]m*9.81*236=0.5*m*v^{2}\\2315.16 = 0.5*v^{2}\\v=\sqrt{4630.32} \\v=68[m/s][/tex]

Answer:

v = 98.1 m/s

Explanation:

We will apply the law of conservation of energy here, between peak A and peak B.

Total Energy of Ball at A = Total Energy of Ball at B

[tex]K.E_{A}+P.E_{A}=K.E_{B}+P.E_{B}\\where,\\K.E_{A} = Kinetic\ Energy\ of\ ball\ at\ Peak\ A = \frac{1}{2}mv^{2} \\K.E_{B} = Kinetic\ Energy\ of\ ball\ at\ Peak\ B = \frac{1}{2}m(0)^{2} = 0\ J (since, ball\ stops\ at\ last) \\[/tex]

[tex]P.E_{A} = Potential\ Energy\ of\ ball\ at\ Peak\ A = mgh_{A}\\P.E_{B} = Potential\ Energy\ of\ ball\ at\ Peak\ B = mgh_{B}[/tex]

[tex]\frac{1}{2}mv^{2} + mgh_{A} = 0\ J + mgh_{B}\\m(\frac{1}{2}v^{2} + gh_{A}) = mgh_{B}\\v = \sqrt{2g(h_{B}-h_{A})}\\where,\\h_{A} = height\ pf\ peak\ A = 5\ m\\h_{B} = height\ pf\ peak\ B = 10\ m\\v = \sqrt{2(9.81\ m/s^{2})(10\ m-5\ m)}\\[/tex]

v = 98.1 m/s

Answer:

0.5 N

Explanation:

(0.6 kg)(9.8 m/s^2) = 5.88 N

(0.6 kg)(5 m/s^2) = 3 N

4 N - 3 N = 1 N

1 N/5.88 N = 0.17

(0.17)(3 N) = 0.51 N which rounds to 0.5 N

When a 4 N force pulls on the cart, the cart accelerates at 5 m/s². The frictional force resisting the pull is 0.5 N.

Friction is defined as the force preventing sliding solid surfaces, fluid layers, and material components from moving relative to one another. When two bodies in contact move in relation to one another, friction, a resistive force, arises. friction factors Between-body surface adhesion: When two materials are in close proximity to one another, a molecular force called adhesion is created.

(0.6 kg) (9.8 m/s²2) = 5.88 N

(0.6 kg) (5 m/s²2) = 3 N

4 N - 3 N = 1 N

1 N/5.88 N = 0.17

(0.17) (3 N) = 0.51 N ≅ 0.5 N

Thus, when a 4 N force pulls on the cart, the cart accelerates at 5 m/s². The frictional force resisting the pull is 0.5 N.

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Answer:

Average speed of the car = 16.53 m.s

Explanation:

For first 5 seconds:

As the car starts from rest, so the initial speed of the car, u=0

Acceleration, a= 4 m/s^2

So, the final speed (speed at time, t=5 second)

v=u+at

v=0 + 4 x 5 = 20 m/s

Distance covered,

[tex]s=ut+\frac 1 2 a t^2 \\\\s=0+\frac 1 2 \times 4 \times 5^2[/tex]

s=50 m

As the car maintained the constant speed of 20 m/s for the next 10 seconds.

Distance traveled in 10 seconds, d=20 x 10 =200 m

For the last 4 seconds:

The car slows down at the rate of 2.0 m / s ^ 2 from the speed of 20 m/s.

As the car slows down, so the acceleration will be negative, i.e a=-2 m/s^2

[tex]s=ut+\frac 12 at^2 \\\\s=20\times 4 +\frac 12 (-2)4^2[/tex]

s=80-16=64 m.

Considering all three cases, the total distance covered=

=50+200+64=314 m

Total time= 5+10+4=19 s

So, the averate peed= Totat distance covered / total time taken

=314/19=16.53 m/s

Answer:

Maximum height = 1.27 m

Explanation:

Given:

θ = 30°

Speed = 10 m/s

Find:

Maximum  height

Computation:

Maximum height = v²(sinθ)² / 2g

Maximum height = 10²(sin30)² / (2x9.81)

Maximum height = 1.27 m

Answer:

Toward the normal line

Explanation:

I had the same question on a quiz

Answer:

2/3.or 0,67

Explanation:

acceleration = Result or sum of force / the mass

a = F/m

a = (35-25)/15

a = 10/15 = 2/3 m/s²

a = 0,67 m/s²