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dexar [7]
3 years ago
9

Calculate the wave speed i the wavelength =64m and the wave period = 4s

Physics
1 answer:
Marina86 [1]3 years ago
8 0
To do this you would take 64 and divide it by 4.
64/4= 16. 
Your answer is 16.
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a sports car accelerates from a standing start to 65 mi\h in 4.61s how far can it travel in that time
igor_vitrenko [27]

The car can travel 220.27 ft in 4.61 s of time.

Given that a sports car accelerates from a standing start to 65 mi/hr.

So the initial velocity = 0 ft/s

The final velocity = 65 mi/hr.

We convert the final velocity from mi/hr. to ft/s.

1 mi/hr = 5280/3600 ft/s

          = 1.47 ft/s

Therefore final velocity = 65 x 1.47 = 95.55 ft/s

The time taken by the car = 4.61 s

Now the average acceleration of the car = final velocity - initial velocity / time taken = 95.55 - 0/ 4.61 s = 20.73 ft/s^2

The displacement of the car , s= ut +\frac{1}{2} at^2 ,

where u is the initial velocity of the car, t, the time taken by the car and a, the average acceleration.

So, displacement = 0 x 4.61 + 1/2 x 20.73 x 4.61^2

                             = 220.27 ft

Hence the distance travelled by the sports car in 4.61s is 220.27 ft.

Learn more about the displacement at brainly.com/question/17006213

#SPJ4

3 0
2 years ago
What are some evidences of early peoples concern for teeth
Alexandra [31]
Replacement teeth were made even back then out of primitive materials, and pig hair was used like floss
7 0
4 years ago
What is the resistance of a toaster that uses 2A when connected to a 120V power source?
denis23 [38]

Answer:

60 ohms

Explanation:

From Ohm's Law:

V = IR

Where V = 120volts

I = 2A

R = ?

Note that R,V and I represents resistance, voltage and current respectively.

Substituting the above values into the formula.

V = IR

120v = 2×R

120= 2R

Making R the subject

R =120/2

R = 60 ohms

Hence the resistance of the toaster will be 60 ohms.

8 0
3 years ago
What are the arrangement of resistors in series ​
Mama L [17]

Answer:

A chain

Explanation:

A series circuit is a circuit, where the resistors are arranged in a chain. They are aligned like this so the current only has one path to take. The current quantity is the same through each resistor.

If you ever have trouble remembering this you can think of a movie series which goes on and on and on. And remembering a parallel circuit is simpler because everything in the circuit will be parallel!

3 0
4 years ago
Read 2 more answers
HELP !! Maura is deciding which hose to use to water her outdoor plants. Maura noticed that the water coming out of her garden h
MA_775_DIABLO [31]
THE GREEN HOSE:
Define the (x,y) coordinate at a height of 4 feet up from the ground to match where Majra is holding the green hose.
This means that the equation for the green hose is of the form
y = a(x - h)² + 4          (1)

Because water from the green hose lands on the ground 10 feet from where Majra is standing, therefore
y(10) = -4                    (2)

Because the curve passes through (0,0), therefore
ah² + 4 = 0
ah² = - 4                     (3)

To satisfy (2), obtain
a(10 - h)² + 4 = -4
a(10 - h)² = - 8            (4)

Divide (3) by (4).
h²/(10-h)² = 1/2
2h² = (10 - h)² = 100 - 20h + h²
h² + 20h - 100 = 0             

Solve with the quadratic formula.
x = 0.5[-20 +/- √(8400)] = 4.142, - 24.142
Reject the negative solution.
The vertex is at (4.142, 4).

From (3), obtain
a = -4/4.142² = -0.2332

The equation for the green hose is
y = 0.2332(x - 4.142)² + 4

THE RED HOSE
The red hose has a vertex at (3,7), according to the equation y = -(x-3)² + 7.

A graph of y(x) for both hoses is shown in the attached figure.

Answers:
a. The red hose will throw the water higher. 

b. The equation for the green hose is
     y = -0.2332(x - 4.124)² + 4,
     with the origin at a height of 4 feet above ground level.

c. The domain for the green hose that makes sense is 0 ≤ x ≤ 10 feet.
     The corresponding range is -4 ≤ y ≤ 4 feet.


3 0
3 years ago
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