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4 years ago

Why does sound move fastest in solid mediums?

Physics

2 answers:

Thepotemich [5.8K]4 years ago

8 0

The particles are closest together in solids. Think about water. You can pass your hand through steam because there is a lot of space between the particles. Liquid water is a little harder to pass through, but it can be done. The particles in ice, however, are so close together that an object cannot pass through it.

Mechanical waves travel fastest through solids and slowest through gases.

Therefore the answer is solids.

Ierofanga [76]4 years ago

7 0

The particles are closest to-gether in a solid formation, so waves travel further as they bump into each other sooner.

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Please help me on my physics hw

MatroZZZ [7]

Answer:

1. 11 A

2. 240 V

3. 8 Ω

4. 60 C

5. 14400 C

Explanation:

1. Determination of the current.

Voltage (V) = 110 V

Resistance (R) = 10 Ω

Current (I) =?

V = IR

110 = I × 10

Divide both side by 10

I = 110 / 10

I = 11 A

2. Determination of the voltage

Current (I) = 3 A

Resistance (R) = 80 Ω

Voltage (V) =?

V = IR

V = 3 × 80

V = 240 V

3. Determination of the resistance.

Current (I) = 0.5 A

Voltage (V) = 4 V

Resistance (R) =?

V = IR

4 = 0.5 × R

Divide both side by 0.5

R = 4 / 0.5

R = 8 Ω

4. Determination of the charge

Current (I) = 2 A

Time (t) = 30 s

Charge (Q) =?

Q = it

Q = 2 × 30

Q = 60 C

5. Determination of the charge.

We'll begin by converting 20 mins to seconds. This can be obtained as follow:

1 min = 60 s

Therefore,

20 mins = 20 × 60

20 mins = 1200 s

Finally, we shall determine the charge as follow:

Current (I) = 12 A

Time (t) = 1200 s

Charge (Q) =?

Q = it

Q = 12 × 1200

Q = 14400 C

6 0

3 years ago

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees

Naya [18.7K]

Answer:

a) F = 1.26 10⁵ N, b) F = 2.255 10³ N, c) F_ {soil} = 3078 N

Explanation:

For this exercise we will use the relationship between momentum and moment

I = Δp

F t = p_f -p₀

a) with stiff legs, final speed is zero, initial velocity is down

Ft = 0-p₀

F = m v / t

let's calculate

F = 84.0 6.82 / 4.56 10⁻³

F = 1.26 10⁵ N

b) bending the legs

let's calculate

F = 84.0 6.82 / 0.254

F = 2.255 10³ N

c) It is requested to calculate the force of the ground on the man

∑ F = F_soil -W

F_soil = F + W

F_ {soil} = 2.255 103 + 84 9.8

F_ {soil} = 3078 N

3 0

3 years ago

You design toys for a toy company. Your boss wants you to hook up the lights in the toy car you are working on in the cheapest w

bezimeni [28]

Answer:

put the car on fire

Explanation:

if you put it on fire you would have a lot of light now

7 0

3 years ago

Read 2 more answers

A bin is given a push across a horizontal surface. The bin has a mass m, the push gives it an initial speed of 1.60 m/s, and the

emmasim [6.3K]

Answer:

The bin moves 0.87 m before it stops.

Explanation:

If we analyze the situation and apply the law of conservation of energy to this case, we get:

Energy Dissipated through Friction = Change in Kinetic Energy of Bin (Loss)

F d = (0.5)(m)(Vi² - Vf²)

where,

F = Frictional Force = μR

but, R = Normal Reaction = Weight of Bin = mg

Therefore, F = μmg

Hence, the equation becomes:

μmg d = (0.5)(m)(Vi² - Vf²)

μg d = (0.5)(Vi² - Vf²)

d = (0.5)(Vi² - Vf²)/μg

where,

Vf = Final Velocity = 0 m/s (Since, bin finally stops)

Vi = Initial Velocity = 1.6 m/s

μ = coefficient of kinetic friction = 0.15

g = 9.8 m/s²

d = distance moved by bin before coming to stop = ?

Therefore,

d = (0.5)[(1.6 m/s)² - (0 m/s)²]/(0.15)(9.8 m/s²)

5 0

3 years ago

A small 17 kilogram canoe is floating downriver at a speed of 2 m/s. What is the canoe's kinetic energy?

Nataly_w [17]

Ke=34J. The canoe's kinetic energy floating downriver at a speed of 2m/s and 17kg mass is 34J.

This is a problem of kinetic energy, which is a form of energy, known as motion energy. The kinetic energy of an object is that which is produced because of its movements that depends on its mass and velocity.

The kinetic energy is represented by the following formula: Ke = ½ mv². The kinetic energy is measured in Joules (J), the mass in kilograms (kg) and the speed in meters over seconds (m/s).

A small 17kg canoe is floating downriver at a speed of 2m/s. Let's calculate canoe's kinetic energy.

Ke= (17kg)[(2m/s)²]/2= 68/2 kg m²/s²=34J

3 0

3 years ago