All categories

3 years ago

PLEASE HELP! (I’m in 8th grade so if you could try to make it soils like an 8th grader)

Physics

1 answer:

Nady [450]3 years ago

4 0

Answer:

Wave A and B have the same pitch, but Wave A is a quieter/softer sound. Wave A and B have the same pitch, but Wave B is a quieter/softer sound. Which sound wave shows the loudest sound?

Explanation:

i tried to help as quick as i could good luck

You might be interested in

If the baseball and the plastic ball were moving at the same speed which ball would hit a bat harder

Natali [406]

The baseball because it has a greater mass and would go farther because it don't have holes for the air to go through and slow it down

6 0

4 years ago

A large 75-kg lighting fixture can be hung from wires of identical size and shape made of aluminum, brass, or copper. The values

marshall27 [118]

Answer:

C. Copper

Explanation:

F = Force on string

$L_0$ = Intial length of string

A = Area of string

E = Young's modulus of material

Change in length is given by

$\Delta L=\frac{FL_0}{AE}$

It can be seen that the change in length is inversely proportional to the Young's modulus of the material.

Here

$E_a=0.7\times 10^{11}\ Pa$

$E_b=0.91\times 10^{11}\ Pa$

$E_c=1.1\times 10^{11}\ Pa$

$\\\Rightarrow E_c>E_b>E_a$

So, copper will stretch the least.

5 0

4 years ago

Which term describes the forces on object with zero net force

erik [133]

Answer:

50n

Explanation:

3 0

3 years ago

A tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 56.0 m/s and returns the shot with the ball

Fofino [41]

Explanation:

It is given that,

Mass of the ball, m = 0.06 kg

Initial speed of the ball, u = 56 m/s

Final speed of the ball, v = -34.5 m/s (opposite direction)

(a) Let J is the impulse delivered to the ball by the racquet. It is equal to the change in momentum of the object as :

$J=m(v-u)$

$J=0.06\ kg(-34.5\ m/s-56\ m/s)$

J = -5.43 kg-m/s

(b) The work done by the racquet on thee ball is equal to the change in kinetic energy as :

$W=\dfrac{1}{2}m(v^2-u^2)$

$W=\dfrac{1}{2}\times 0.06((-34.5)^2-(56)^2)$

W = -58.372 Joules

7 0

3 years ago

You and a friend both leave the same restaurant to drive home. You are heading directly west at 30 miles per hour and he or she

steposvetlana [31]

Answer:

$\frac{dAB}{dt} = = 50 miles/ hour$

Explanation:

let A represent me and B represent my friend

A speed $\frac{dOA}{dt}$ =30 m/hr toward west

B speed $\frac{dOB}{dt}$ =40 m/hr toward south

after 1/2 hr

total distance cover by A =1/2 * 30 miles = 15 miles

total distance by B = 1/2*40 miles = 20 miles

now from figure

$AB = \sqrt{(15^2+20^2)} = 25 miles$

$AB^2 =OA^2+ OB^2$

Differentiate above equation

$2AB\frac{dAB}{dt} = 2OA\frac{dOA}{dt} +2OB\frac{dOB}{dt}$

$25*\frac{dAB}{dt} = 15*30 +20*40$

$\frac{dAB}{dt} = \frac{1250}{25}$

$\frac{dAB}{dt} = = 50 miles/ hour$

5 0

4 years ago

Read 2 more answers