This was due yesterday...

Answer:

248.5Hz or 251.5Hz

Explanation:

Given :

Beat frequency, Fbeat = 1.5 Hz

Frequency of string 1, f1 = 250 Hz

Frequency of string 2, f2 =?

Recall:

Fbeat = |f1 - f2|

1.5 = 250 - f2

f2 = 250 - 1.5

f2 = 248.5 Hz

OR

- Fbeat = |f1 - f2|

- 1.5 = 250 - f2

f2 = 250 + 1.5

f2 = 251.5 Hz

Hence, the two possible frequencies of the other string are 248.5Hz or 251.5Hz

Answer:

30×6=n

Explanation:

30 students in her class× 6 = number of students in the entire 4th grade.

Answer:

B . x= v*cos ∅* 6.2

Explanation:

Time of flight of a projectile motion is the time taken by the object to reach the surface from when it was projected.

In this case ;

Initial launch velocity = v

Angle of launch is =∅

Time of flight = 6.2 seconds

The formula for time of flight is;

T= 2*v*sin∅  / g

At time t the displacement components for x and y are;

x= v* t * cos ∅  ----------------i

and

y =u* t * sin ∅ - 1/2 g*t² ------------ii

Taking equation i for displacement of the object in the x component

x = v* t* cos ∅

x = v * cos ∅ * 6.2

x = 6.2* v * cos ∅

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:

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:

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:

A car engine has more power than a horse because a car engine does the same amount of work in time. Yasmin and Raj each had 10 boxes of equal weight to stack next to each other on the same shelf, at the same height and in the same arrangement. Yasmin completed the task in 2 minutes, while Raj took 3 minutes to stack his boxes. Raj applied less power than Yasmin because his stacking took more time to do the same amount of work.

Explanation:

A car engine has more power than a horse because a car engine does the same amount of work in less time. Raj applied less power than Yasmin because his stacking took more time to do the same amount of work.

The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.

Energy divided by time represents the dimension of power. The watt (W), which equates to one joule per second, is the unit of power in the International System of Units (SI).

Another popular unit of measurement is horsepower (hp), which is equivalent to a horse's power; one mechanical horsepower is equal to around 745.7 watts.

Learn more about power here:

https://brainly.com/question/29575208

#SPJ5

Answer:

all of above I think sorry if I'm not right but I tried

Answer:  d

Explanation:

Answer:

the ceiling

Explanation:

i dont know man but thats what my swimming instructor said, but i havent swam in like 3 years so ..

Answer: b. infrared

Explanation:

The visible light with the smaller frequency is associated with the color red.

While the blue is the one with the larger frequency.

Now, as the name says, infrared waves are the ones with a frequency just below the one of the red visible light.

Where the frequency of the red light is something around (4.3*10^14 Hz)

and the frequency of the infrared waves is in the range between (10^12 Hz and 10^14 Hz)

Then the correct option is b, infrared.

Answer:

It's a fatty insulation.

Explanation:

"Myelin" is a fatty substance which insulates the axons of the nerve cells. Therefore, it covers the axons. This makes choice A correct and choice C incorrect.

This allows faster neural communication or hastens the transmission of signals between neurons. This makes choice A incorrect and choice E incorrect. It doesn't inhibit neural communication nor does it slow down neuronal operation; rather, it increases both speed.

Myelin can be affected by illness. An example of this is the disease called "Multiple Sclerosis," which targets the myelin sheath.

Answer:

B) they have been proven to cause drowsiness

Explanation:

B is the only answer that makes sense, as the other answers do not make sense.  All medications are scientifically tested before they can be used by someone.  Covering their bases would show negligence and is bad.

Hope this helps!

PS, this is biology or medical, not physics.

Answer:

[tex]136.28\ \text{s}[/tex]

19.08 m/s or 68.688 km/h

Explanation:

a = Aceleración = [tex]0.14\ \text{m/s}^2[/tex]

s = Desplazamiento = [tex]1.3\ \text{km}=1300\ \text{m}[/tex]

u = Velocidad inicial = 0

t = Tiempo empleado

De las ecuaciones cinemáticas obtenemos

[tex]s=ut+\dfrac{1}{2}at^2\\\Rightarrow 1300=0+\dfrac{1}{2}\times 0.14t^2\\\Rightarrow t=\sqrt{\dfrac{1300\times 2}{0.14}}\\\Rightarrow t=136.28\ \text{s}[/tex]

El tiempo necesario para recorrer una distancia de 1,3 km es [tex]136.28\ \text{s}[/tex]

[tex]v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 0.14\times 1300+0}\\\Rightarrow v=19.08\ \text{m/s}=19.08\times 3.6=68.688\ \text{km/h}[/tex]

La velocidad final del automóvil es 19.08 m/s so 68.688 km/h.

Answer:

to be balanced moments should be equal

4m

Explanation:

[tex]fd = fd \\ 600 \times 2 = 300 \times x \\ \frac{600 \times 2}{300} = x \\ 4m[/tex]

Answer:

4m

Explanation:

fd=fd

600×2× x

300

4m ans

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: it’s b

Explanation:

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

Answer:

The answer is A. Cementing...

Explanation:

hope this helps

Answer:

plate tectonics

Explanation:

brainliest also 100% flvs

Answer:

The biceps muscle is located at the front of your upper arm. The muscle has two tendons that attach it to the bones of the scapula bone of the shoulder and one tendon that attaches to the radius bone at the elbow. The tendons are tough strips of tissue that connect muscles to bones and allow us to move our limbs.

Explanation:

Glad i could help pls give brainliest and or thanks

Answer: The amplitude or height of a wave is measured from the peak to the trough

Explanation: The wavelength is measured from peak to peak. Otherwise wavelength is directly related to the frequency of a given wave form

Answer:

-3m+7m =  4m

Explanation:

As he walks south, he is going down 3m (-3m). Then he walks up 7m (+7m).

You subtract the final position from the initial position to get displacement.

7m - 3m = 4m

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

Answer:

Acceleration

Explanation:

The advertisement is describing the acceleration of the car.

Acceleration is the rate of change of velocity per unit of time. It can be expressed mathematically as;

 Acceleration  = [tex]\frac{v - u}{t}[/tex]  

 v is the final velocity

 u is the initial velocity

 t is the time taken

 Any quantity that specifies the rate of change of velocity of a body within a given time frame is describing its acceleration.

Answer:

  D.  No, because the student needs to know the direction that the force is applied

Explanation:

The change in momentum depends on the direction of the force as well as its magnitude. Since the graph only supplies force magnitude information, it is insufficient to allow the student to calculate the change in momentum.

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:

Significant figures are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit. Calculate the number of significant figures for an assortment of numbers.

Explanation:

any of the digits of a number beginning with the digit farthest to the left that is not zero and ending with the last digit farthest to the right that is either not zero or that is a zero but is considered to be exact. — called also significant figure.

Explanation:

The true statement about gravity is that it is the force of attraction between two objects with masses and also, based on the distance between these objects.

Gravity is a force of attraction.

The best scientific overview of the force of gravity is given by the Newton's law of universal gravitation which states that "the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them",

So, gravitational force of attraction is dependent on mass and the distance between two bodies.

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.