Match the matter to the wave that moves through it.
sound wave
air
earthquake wave
water
ocean wave
land

Answer:

No. of electrons = 88

Explanation:

Given that,

No. of protons = 88

No. of neutrons = 226

We need to find the number of electrons it have in a radium atom.

In an atom, the number of protons is equal to the number of electrons. There are 88 protons in this case.

Hence, there are 88 electrons in the radium atom.

Answer:

if you multiply the coefficient to the denominator you will find that the percentage of increase is equal to your ending point

Explanation:

Answer:

12.6

Explanation:

Answer:

|F| = 393750  N

Explanation:

Given that,

Total mass of the train, m = 750000 kg

Initial speed, u = 84 m/s

Final speed, v = 42 m/s

Time, t = 80 s

We need to find the net force acting on the train. The formula for force is given by :

F = ma

[tex]F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{750000\times (42-84)}{80}\\\\F=-393750\ N[/tex]

So, the magnitude of net force is 393750  N.

Explanation:

Hey there!

Given;

Force (f) = 100 N

Acceleration (a) = 10m/s^2.

Mass (m)=?

We have;

Force = mass * acceleration.

So,

100 = m * 10

Or, 100 = 10m

Or, m= 100/10

Therefore, mass is 10kg.

Hope it helps....

Answer:

4kg

Explanation:

Given parameters:

Kinetic energy  = 1.6J

Velocity  = 0.2m/s

Unknown:

Mass of the body = ?

Solution:

The kinetic energy of a body is the energy due to the motion of the body.

It is mathematically expressed as;

  Kinetic energy = [tex]\frac{1}{2}[/tex]  m v²

m is the mass

v is the velocity

          1.6  =  [tex]\frac{1}{2}[/tex]  x 0.2 x v²  

          1.6  = 0.1v²

         v²   = 16

          v  = 4kg

Answer:

D. F = 24000[N]

Explanation:

To be able to calculate the force we must first find the pressure at the bottom of the tank. By means of the following equation:

[tex]P=Ro*g*h[/tex]

where:

Ro = density of the liquid = 800 [kg/m³]

g = gravity acceleration = 9.81 [m/s²]

h = elevation = 1.2 [m]

[tex]P=800*9.81*1.2\\P=9417.6[Pa][/tex]

Pressure is defined as the relationship between Force on the area.

[tex]P=F/A\\F=9417.6*2.5\\F = 23544 [N] = 24000[N][/tex]

Answer:

6.2 ×10^-25

Explanation:

Ma = mg

a = (m/M)g

[tex]a = \frac{0.38}{5.98 \times {10}^{24} } \times 9.8 = 6.2 \times {10}^{ - 25} [/tex]

Answer:

The absorption of water and minerals by taproot is more efficient with the taproot system. Fibrous root absorbs water more efficiently as it reaches deep into the soil. Taproots are capable of withstanding drought.

Answer: it’s b

Explanation:

I had two attempts to do the test first I picked c but I did it again it’s b .

Explanation:

The frequency of the engine is given by :

[tex]f=\dfrac{rpm}{60}[/tex]

We have, the engine increases its performance from zero to 2700 rpms.

Frequency,

[tex]f=\dfrac{2700}{60}\ \text{cycles per second}\\\\f=45\ \text{cycles per second}[/tex]

The time period of the engine is given by :

T = f/f

So,

[tex]T=\dfrac{1}{45}\ s\\\\T=0.023\ s[/tex]

Hence, the required frequency and the period is 45 cycles/second and 0.023 seconds respectively.

Answer:

b d c a

Explanation:

Answer:

A. 2.5 m/s²

B. 4.29 m/s²

Explanation:

A. Determination of the acceleration.

Mass (m) = 28000 Kg

Force (F) = 70000 N

Acceleration (a) =?

Force (F) is simply defined as the product of mass (m) and acceleration (a). Mathematically, it is expressed as:

Force (F) = mass (m) × acceleration (a)

F = ma

Divide both side by m

a = F / m

With the above formula, we can obtain the acceleration as follow:

Mass (m) = 28000 Kg

Force (F) = 70000 N

Acceleration (a) =?

a = F / m

a = 70000 /28000

a = 2.5 m/s²

B. Determination of the acceleration.

Mass (m) = 28000 Kg

Force (F) = 120000 N

Acceleration (a) =?

a = F / m

a = 120000 /28000

a = 4.29 m/s²

Answer:

4.71m/s

Explanation:

Given parameters:

Distance covered  = 40.5m

Time taken  = 8.6s

Unknown:

Speed  = ?

Solution:

The speed of Samantha is the distance divided by the time taken.

  Speed  = [tex]\frac{Distance}{time}[/tex]  

 Now insert the parameters;

   Speed  = [tex]\frac{40.5}{8.6}[/tex]   = 4.71m/s

Answer:

A parallel circuit

Explanation:

there you go

hope that helps

thanx

Answer:

parallel circuit

Explanation:

Answer:

Distance 50m

final velocity 20ms^-1

[tex]s = ut + \frac{1}{2} a {t}^{2} \\ = 0 \times t + \frac{1}{2} \times 4 \times {5}^{2} = 50m[/tex]

[tex]v = u + at \\ v = 0 + 4 \times 5 \\ v = 20ms^{ - 1} [/tex]

Answer:

the answer is c

Explanation:

water is abiotic

Answer:

the answer is C

Explanation:

Its the only reaction with abiotic and biotic.

Answer:

1. Sound waves are changed into electrical

2. Radio waves are released by transmitter

by radios

3. Radio waves are converted to sound waves

Explanation:

Answer:

The person in front of me is right

Explanation:

There’s my proof

Answer: the formula for momentum is velocity times mass

car :

350 x 20 = 7000

truck:

400 x 17.5 = 3000

Ans : Car has a greater momentum

Explanation: Please mark Brainlest

Answer:

Blue

Explanation:

The colors of the rainbow are known by the acronym; ROYGBIV.

This is;

Red, Orange, Yellow, Green, Blue, Indigo, and Violet.

From research, their respective wavelengths on the average are;

Red: 665 nm

Orange; 630 nm

Yellow; 600 nm

Green; 550 nm

Blue; 470 nm

Indigo; from 445nm to 464 nm

Violet; less than 400 nm

This means that from Red to Violet in that order, wavelength is decreasing in a descending order.

Now in refraction, the light with shortest wavelength will be bent the most while that with longest wavelength will be bent the least.

Thus, violet bends the most.

However, violet is not included in the options. So the next one that will bend the most after violet among the options given is Blue.

Answer:

876m/s

Explanation:

Using the formula

1/2mv² = 3/2nRT

mv² = 3nRT

m is the mass = 0.02kg

v is the average velocity of atom

n is the mole = 2.00atm

T is the temperature = 308K

R is the Boltzmann constant = 8.31 J/(mol-K).

Get the velocity

v² = 3nRT/m

Substitute the given values into the formula

v² = 3×2(8.31)(308)/0.02

v² = 3×5,118.96/0.02

v² = 15356.88/0.02

V = √767844

v = 876.27m/s

Hence the average velocity of the atom us 876m/s

Answer:

•marine biology.

Explanation:

A mechanical engineer is a professional individual who ensures the design of a mechanical assembly as well as the monitoring of its realization. His role involves the manufacturing of a prototype and developing new products for the company. Responsible for manufacturing, he advises the company and customers and assesses the risks and techniques used for its development. Finally, he supervises the installation and the market penetration of the product, as well as its maintenance.

A mechanical engineer can collaborate with many useful and complementary professions such as designers or marketers, it ensures the appearance and technical operation of the product. It is a job under high responsibility with projects that can be large.

Finally, he can also work in the construction sector, in the automotive industry, biomechanics, shipbuilding, aerospace production and aeronautics, railways, mechanics and metallurgy, robotics, textile machinery, etc.

Answer: A  a mechanical wave travels through empty space, while an electromagnetic wave travels through matter.

Explanation: A mechanical wave travels through empty space, while an electromagnetic wave travels through matter. A mechanical wave has a short wavelength, while all electromagnetic waves have long wavelengths.

Answer:

yes because if red light was natural then it should cause more damage because that how it is

Answer:

its yes because if red light was natural then it should cause more damage because that how it is

Answer:

C.) 7.9 km

Explanation:

Distance and Displacement

An object who constantly travels for some distances at defined periods of time has a total distance as the sum of each individual distance the object traveled. It can be written as:

dtotal=d1+d2+d3+...+dn

This sum is obtained independently of the direction the object moves.

The displacement only takes into consideration the initial and final points of the path defined by the object in its moving. The displacement, unlike distance, is a vectorial magnitude and can be even zero if the object starts and ends the movement at the same point.

Dr. Suarez walks 2.8 km north and then 5.1 km south. The total distance is simply the sum of both distances: 2.8 km + 5.1 km = 7.9 km.

Note the distance does not have any direction (north or south), it's just the number.

Answer: C.) 7.9 km