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4 years ago

Why do you hear sound when you clap your hands?

2 answers:

7 0

When you move your hands, you have kinetic energy. Once your hands collide, that energy has to go somewhere. It turns into heat and sound waves that creates ripples which disturbs the air particle. This is how sound works, a disturbance in air particles.

iogann1982 [59]4 years ago

6 0

Answer:

Because there are things called sound waves, so you hear a sound when you hit your brother or clap your hands

Explanation:

plain and simple

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What is the amplitude of oscillation a of the scale after the slices of ham land on the plate?

fgiga [73]

Answer:

0.093

Explanation:

A = √(mgh/K)

M= 0.7 h= 0.25

K= 200 g= 9.8

= √(0.7*9.8*0.25)/200

= √(1.715)/200

=√0.008575

A = 0.093m

4 0

4 years ago

A 0.280-kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with

Jet001 [13]

Answer:

mass of second ball is 0.84 kg

Explanation:

mass of ball = 0.280 kg

to find out

mass of the second ball

solution

we know here elastic head on collision and

second ball moves = half the original speed

we consider here m1 mass of 1st ball and m2 mass of second ball

v1 = velocity of first ball before collision

v2 = velocity of second ball before collision

v3 = velocity of first ball after collision

v4 = velocity of second ball after collision

so here

we know 2nd ball was on rest so v2 = 0

after collision v4 = 1/2 ( v1)

and we know head on collision so

v3 = - v1/2

so from law of conservation of mass

m1v1 + m2v2 = m1v3 + m2v4

put here value

m1v1 + m2(0) = m1(-v1/2) + m2(v1/2)

solve and we get

m2 = 3m1

m2 = 3( 0.280) = 0.84

mass of second ball is 0.84 kg

7 0

4 years ago

If a net force is greater than 0 Newtons, what is the force?

goldenfox [79]

Answer:disequilibrium

Explanation:

When the net force is not zero it is called disequilibrium

5 0

4 years ago

A soccer player with a mass of 80.0 kg kicks a ball by applying a 20.0 N force. What force does the ball exert on the player?

Misha Larkins [42]

Answer:

F = 160.0 N

Explanation:

Given: Soccer payer with a mass = 80 kg, force = 20 N

To find: force

Formula: $F=ma$

Solution: It is summarized by the equation: Force (N) = mass (kg) × acceleration (m/s²). Thus, an object of constant mass accelerates in proportion to the force applied.

F = m × a

F = 20 kg - 10 = 2

F = 80 × 2 = 160

F = 160.0 N

Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.

4 0

3 years ago

an object will sink in a liquid if the density of the object is greater than that of the liquid. the mass of a sphere is 61.3g.

marin [14]

Question:

An object will sink in a liquid if the density of the object is greater than that of the liquid. The mass of a sphere is 61.3g.

If the volume of this sphere is less than ________ cm3, then the sphere will sink in liquid mercury (density = 13.6 g/cm3).

Answer:

$Volume= 4.51cm^3$