2 years ago

The speed of sound waves

1 answer:

4 0

B. Is faster in solids than liquids would be the correct answer because the molecules in solids are much closer and can pass along energy faster and more effectively.

You might be interested in

A basketball with a mass of 20 kg is accelerated with a force of 10 N. If resisting forces are ignored, what is the acceleration

kupik [55]

I’m pretty sure it would be 10/20= 0.5m/s2

7 0

2 years ago

What is the moment of inertia of an object that rolls without slipping down a 3.5-m- high incline starting from rest, and has a

Daniel [21]

Answer:

I = 0.287 MR²

Explanation:

given,

height of the object = 3.5 m

initial velocity = 0 m/s

final velocity = 7.3 m/s

moment of inertia = ?

Using total conservation of mechanical energy

change in potential energy will be equal to change in KE (rotational) and KE(transnational)

PE = KE(transnational) + KE (rotational)

$mgh = \dfrac{1}{2}mv^2 + \dfrac{1}{2}I\omega^2$

v = r ω

$mgh = \dfrac{1}{2}mv^2 + \dfrac{1}{2}\dfrac{Iv^2}{r^2}$

$I = \dfrac{m(2gh - v^2)r^2}{v^2}$

$I = \dfrac{mr^2(2\times 9.8 \times 3.5 - 7.3^2)}{7.3^2}$

$I =mr^2(0.287)$

I = 0.287 MR²

3 0

3 years ago

Which statement about the physical change of liquid water boiling into steam is true? The heat added represents an energy change

Colt1911 [192]

Answer:

The heat added represents an energy change.

Explanation:

6 0

2 years ago

Read 2 more answers

Three rocks with masses of 1 kg, 5 kg, and 10 kg fall from the same height.

Naily [24]

Answer:
The 10 kg rock has more inertia than the other two rocks.

Explanation

4 0

2 years ago

Read 2 more answers

A strong lightning bolt transfers about 25 c to earth. how many electrons are transferred? the elementary charge is 1.60218 × 10

tensa zangetsu [6.8K]

The total charge transferred is $Q=25 C$ . This total charge consists of N electrons, each one with charge $e=1.6 \cdot 10^{-19}C$ . To find N, the number of electrons transferred, we must simply divide the total charge by the charge of a single electron:
$N= \frac{Q}{e}= \frac{25 C}{1.6 \cdot 10^{-19}C}=1.56 \cdot 10^{20}$

5 0

2 years ago