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3 years ago

What are the 4 different types of mechanical waves

Physics

2 answers:

slamgirl [31]3 years ago

5 0

Answer:

Examples of mechanical waves

Water waves

sound waves

Spring waves

waves of the tuning fork

Explanation:

jolli1 [7]3 years ago

4 0

Answer:

Some of the most common examples of mechanical waves are water waves, sound waves, and seismic waves. There are three types of mechanical waves: transverse waves, longitudinal waves, and surface waves.

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During the first 40 s a truck traveled at a constant speed of 15 m/s. Find the

kotykmax [81]

Answer:

600 m

Explanation:

Distance = speed × time

= (15)(40)

= 600 m

6 0

3 years ago

A man works on a striaght road from his home to market 2.5km away dwith a speed of 5km/h.Finding the market closed, he instantly

umka21 [38]

Answer:

5.625km/h

Explanation:

We are given that

Distance between home and market, d=2.5 km

Speed, v1=5km/h

Speed, v2=7.5 km/h

We have to find the average speed of the man over the interval of time 0 to 40min.

Time, $t=\frac{distance}{speed}$

Using the formula

$t_1=\frac{2.5}{5}=0.5 h=0.5\times 60=30 min$

1 hour =60 min

$t_2=\frac{2.5}{7.5}=\frac{1}{3}hour=\frac{60}{3}=20min$

Distance traveled by man in 10 min with speed 7.5 km/h= $\frac{2.5}{20}\times 10=2.5/2km$

Therefore,

Total distance covered=2.5+2.5/2=3.75 km

Time=40 min=40/60=2/3 hour

Average speed= $\frac{total\;distance}{total\;time}$

Average speed= $\frac{3.75}{2/3}=5.625km/h$

7 0

3 years ago

Astronomers observe two separate solar systems each consisting of a planet orbiting a sun. The two orbits are circular and have

Oxana [17]

Answer:

(D) 3

Explanation:

The angular momentum is given by:

$\vec{L}=\vec{r}\ X \ \vec{p}$

Thus, the magnitude of the angular momenta of both solar systems are given by:

$L_1=Rm_1v_1=Rm_1(\omega R)=R^2m_1(\frac{2\pi}{T_1})=2\pi R^2\frac{m_1}{T_1}\\\\L_2=Rm_2v_2=2\pi R^2\frac{m_2}{T_2}$

where we have taken that both systems has the same radius.

By taking into account that T1=3T2, we have

$L_1=2\pi R^2\frac{m_1}{3T_2}=\frac{1}{3}2\pi R^2\frac{1}{T_2}m_1=\frac{1}{3}\frac{L_2}{m_2}m_1$

but L1=L2=L:

$L=\frac{1}{3}L\frac{m_1}{m_2}\\\\\frac{m_1}{m_2}=3$

Hence, the answer is (D) 3

HOPE THIS HELPS!!

3 0

3 years ago

You step on the gas pedal in your car, and the car engine’s rotational speed changes from 1200 rpm to 3000 rpm in 3.0 s. What is

Gnom [1K]

frequency of engine is given here

$initial frequency = 1200 rpm$

$f_i = 1200/60 = 20 Hz$

$final frequency = 3000 rpm$

$f_f = 3000/60 = 50 Hz$

now we have angular speed as

$\omega_i = 2\pi f_i$

$\omega_i = 2\pi(20) = 40\pi$

similarly

$\omega_f = 2\pi f_f$

$\omega_f = 2\pi(50) = 100 \pi$

now by the formula of angular acceleration we will have

$\alpha = \frac{\omega_f - \omega_i}{\Delta t}$

$\alpha = \frac{100\pi - 40\pi}{3}$

$\alpha = 20\pi rad/s^2$

$\alpha = 62.8 rad/s^2$

4 0

3 years ago

A dog runs 51 m west to fetch a ball and brings it back only 27 m before stopping.

ruslelena [56]

The answer is 88m cause that’s the total distance the dog had ran in total and if that’s not the answer it’s 24m cause that’s how much further he had to go to retrieve it all the way back to the same position

3 0

3 years ago