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4 years ago

The forward movement of orbital waves classifies them as ____ waves.

1 answer:

7 0

The forward movement of orbital waves classifies them as progressive waves.
Orbital waves are waves that occur at the interface of two materials, with different densities e.g water and air. Ocean waves for example are all characterized by a circular motion. They combine the characteristics of longitudinal and transverse waves. Orbital waves are classified as progressive wave as the wave fronts move through a medium.

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5. The table shows the total vertical distance a free-falling body travels for each second it falls. About how far does the free

ratelena [41]

Answer:

a. 44 m

Explanation:

We don't have the table but we can still answer since the motion is a free-fall motion.

First of all, we calculate the velocity of the body at time t = 4 s, with the equation

$u'=u+gt$

where

u = 0 is the initial velocity

g = 9.8 m/s^2 is the acceleration of gravity (we take downward as positive direction)

t is the time

Using t = 4 s,

$u'=0+(9.8)(4)=39.2 m/s$

Now we can calculate the distance covered during the time t = 4 s and t = 5 s using the other suvat equation

$s=u'\Delta t+\frac{1}{2}g\Delta t^2$

where

$\Delta t = 5-4=1s$ is the time interval we are considering. Substituting values,

$s=(39.2)(1)+\frac{1}{2}(9.8)(1)^2=44 m$

4 0

3 years ago

A Ferris wheel turns at a constant 150.0 revolutions per hour. (a) Express this rate of rotation in units of radians per second.

RUDIKE [14]

Answer:

(a) 0.261 rad/s

(b) 1007.72 m

Explanation:

The angular velocity of the Ferris wheel is 150.0 revolutions per hour.

(a) To calculate the angular velocity of the wheel in units of radians per second, you take into account the following equivalence:

1 hour = 3600 seconds

1 revolution = 2π radians

You use the previous conversion factors:

$150.0\ \frac{rev}{h}*\frac{2\pi \ rad}{1\ rev}*\frac{1\ h}{3600\ s}=0.261\frac{rad}{s}$

In units of radians per seconds the wheel turns at 0.261 rad/s

(b) To find the arc length described by the wheel, you first calculate the angle described by the wheel in the time t, by using the following formula:

$\theta=\omega t$ (1)

ω: angular velocity = 0.261 rad/s

t: time = 4.95 min

You first convert the time to units of seconds

$4.95min*\frac{60s}{1min}=297s$

Next, you replace the values of the parameters in the equation (1):

$\theta=(0.261\frac{rad}{s})(297s)=77.51rad$

Next, you use the following formula for the arc length:

$s=r\theta$ (2)

r: radius of the wheel = 13.0 m

You replace the values of the parameters in the equation (2):

$s=(13.0m)(77.51rad)=1007.72m$

The arc length described by the wheel is 1007.72m

4 0

4 years ago

At what temperature the semiconductor behaves like conductor?

hammer [34]

Answer:

A semiconductor acts like an ideal insulator at absolute zero temperature that is at zero kelvin. It is because the free electrons in the valence band of semiconductors will not carry enough thermal energy to overcome the forbidden energy gap at absolute zero.

5 0

3 years ago

What effect does observing a substance's physical properties have on the substance

Phoenix [80]

It can be observed without changing the identity of the object.

4 0

4 years ago

PLEASE HELP!!!!!!!!!!!

Alexxandr [17]

I am 100% sure its A.

5 0

3 years ago

Read 2 more answers