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3 years ago

Pallu

2 answers:

8 0

Answer: The pitch of the sound is related to its frequency. The low pitch of an instrument is called bass, and a high-pitched singing voice is called soprano.

Sladkaya [172]3 years ago

5 0

Answer:

The pitch

Explanation:

The pitch of the sound is related to its frequency. The low pitch of an instrument is called bass, and a high-pitched singing voice is called soprano.

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A 20 g ball is fired horizontally with speed v0 toward a 100 g ball hanging motionless from a 1.0-m-long string. The balls un-de

sladkih [1.3K]

Answer:7.93 m/s

Explanation:

Given

mass of ball $m_1=20\ gm$

Mass of hanging ball $m_2=100\ gm$

Length of string $L=1\ m$

Maximum angle turned $\theta _{max}=50^{\circ}$

$v_o$ is the initial velocity of ball 1 and 0 is the initial velocity of ball 2

For Perfectly elastic final velocity of ball 1 and 2 is given by

$v_2'=\frac{2m_1}{m_1+m_2}\cdot v_1-\frac{m_1-m_2}{m_1+m_2}\cdot v_2$

$v_1'=\frac{m_1-m_2}{m_1+m_2}\cdot v_1+\frac{2m_2}{m_1+m_2}\cdot v_2$

where $v_1$ and $v_2$ are the velocity of 1 and 2 before collision

thus $v_2'=\frac{2\times 20}{120}v_0-0$

$v_2'=\frac{v_o}{3}$

$v_1'=\frac{20-100}{120}\times v_o+0$

$v_1'=-\frac{2}{3}v_o$

By energy conservation on second ball we get

Kinetic energy=Potential Energy

$\frac{1}{2}m_2(v_2')^2=m_2gL(1-\cos \theta )$

$v_2'=\sqrt{2gl(1-\cos \theta )}$

$v_2'=\sqrt{2\times 9.8\times 1(1-0.642)}$

$v_2'=2.64\ m/s$

thus $v_o=3\times v_2'=7.93\ m/s$

5 0

3 years ago

A spring with spring constant 13.1 N/m hangs from the ceiling. A ball is suspended from the spring and allowed to come to rest.

Alenkinab [10]

Answer:

Explanation:

spring constant, K = 13.1 N/m

22 oscillations in 20 seconds

time taken to complete one oscillation is called time period.

T = 20 / 22 second = 0.909 seconds

(a) let m be the mass.

The formula for the time period is

$T = 2\pi \sqrt{\frac{m}{K}}$

$m = \frac{T^{2}K}{4\pi ^{2}}$

$m = \frac{0.909^{2}\times 13.1}{4\pi ^{2}}$

m = 0.275 kg

(b) maximum speed, v = ω A = 2π A / T

v = ( 2 x 31.4 x 0.1) / 0.909

v = 0.691 m/s

6 0

4 years ago

Which statement best explains how a planet affects the orbit of a comet as the comet passes by the planet?

mezya [45]

Comets orbit the sun just like planets do. Except a comet usually has a very elongated orbit. Thanks to the laws of gravity comets obey the same laws. A comets orbit takes it very close to the sun and then far away again.

8 0

3 years ago

A children’s roller coaster is released from the top of a track. If it’s maximum speed at ground level is 8 m/s, find the height

cupoosta [38]

Answer:

80 miles per 80 miles per hour so Likud those up So the kid throws up

4 0

4 years ago

A bullet with a mass of 5.00 x 10^-3 kg is loaded into a gun. The loaded gun has a mass of 0.52 kg. The bullet is fired, causing

beks73 [17]

For the answer to the question above,
220 m/s
mass of the bullet * velocity of the bullet = mass of the gun * velocity of the gun 
0.005 kg * v = 0.52 kg * 2.1 m/s 
-> v = (0.52kg * 2.1 m/s) / 0.005 kg = 218.4 m/s
I hope my answer helped you. Have a nice day!

3 0

4 years ago