For each statement in the rows, select the most suitable option (words) in the columns. One selection for each row.

When a wave strikes a solid barrier it behaves like a basketball hitting a backboard this wave behavior years called?

Mama L [17]

This behavior is called reflection.
Reflection is a change of in direction of the wave when it reaches another medium. Imagine a wave colliding with a glass in a tank of water.
During reflection, some of the initial energy of the wave is lost.
Waves always reflect with at same angle at which it approached the obstacle.

5 0

4 years ago

A physical pendulum consists of a meter stick that is pivoted at a small hole drilled through the stick a distance d from the 50

PSYCHO15rus [73]

Answer:

(a). The value of d is 0.056 cm and 1.496 cm.

(b). The time period is 1.35 sec.

Explanation:

Given that,

Length = 50.00 cm

Time period = 2.50 s

Time period of pendulum is defined as the time for one complete cycle.

The period depends on the length of the pendulum.

Using formula of time period

$T=2\pi\sqrt{\dfrac{I}{mgh}}$

Where, I = moment of inertia

We need to calculate the value of d

Using parallel theorem of moment of inertia

$I=I_{cm}+md^2$

For a meter stick mass m , the rotational inertia about it's center of mass

$I_{cm}-\dfrac{mL^2}{12}$

Where, L = 1 m

Put the value into the formula of time period

$T=2\pi\sqrt{\dfrac{\dfrac{mL^2}{12}+md^2}{mgd}}$

$T=2\pi\sqrt{\dfrac{L^2}{12gd}+\dfrac{d}{g}}$

$T^2=4\pi^2(\dfrac{L^2}{12gd}+\dfrac{d}{g})$

Multiplying both sides by d

tex]T^2d=4\pi^2(\dfrac{L^2}{12g}+\dfrac{d^2}{g})[/tex]

$(\dfrac{4\pi^2}{g})d^2-T^2d+\dfrac{\pi^2L^2}{3g}=0$

Put the value of T, L and g into the formula

$4.028d^2-6.25d+0.336=0$

$d = 0.056\ m, 1.496\ m$

The value of d is 0.056 cm and 1.496 cm.

(b). Given that,

L = 50-5 = 45 cm

We need to calculate the time period

Using formula of period

$T=2\pi\sqrt{\dfrac{l}{g}}$

Put the value into the formula

$T=2\pi\sqrt{\dfrac{45\times10^{-2}}{9.8}}$

$T=1.35\ sec$

Hence, (a). The value of d is 0.056 cm and 1.496 cm.

(b). The time period is 1.35 sec.

7 0

3 years ago

On the sunlit surface of Venus, the atmospheric pressure is 9.0 106 Pa, and the temperature is 740 K. On the earth's surface the

iren2701 [21]

Answer:

the ratio (N/V)Venus / (N/V)Earth = 39 : 1

Explanation:

Detailed explanation and calculation is shown in the image below

3 0

3 years ago

Read 2 more answers

The scientific method often begins by asking questions about the natural world. Which of the following is an example of a scient

igomit [66]

Answer:

A: How does fertilizer affect plant growth?

3 0

3 years ago

What two factors affect projectile motion? A) distance and angle B) distance and amplitude C) initial velocity and angle D) init

maksim [4K]

Answer:

C) Initial velocity and angle

Explanation:

The path of the projectile motion is a parabolic path. The motion of a projectile motion is studied by splitting the motion into 2 mutually perpendicular components; one along the horizontal x axis and other vertical y axis.

The position of the projectile at any time $t$ is given as:

$x=ut\cos \theta\\y=ut\sin \theta - \frac{1}{2}gt^2$

Where,

$u\rightarrow \textrm{Initial velocity}\\v\rightarrow \textrm{Final velocity}\\\theta\rightarrow \textrm{Angle of projection}\\g\rightarrow \textrm{Acceleration due to gravity}$

From the above equations, we conclude that,

The projectile motion depends on two factors:

i. Initial velocity ( $u$ )

ii. Angle of projection ( $\theta$ )

Option C is correct.

4 0

3 years ago