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4 years ago

Describe the energy transformations that occur when you bounce a ball?

Physics

2 answers:

Gemiola [76]4 years ago

7 0

The transformation is kinetic energy

Semmy [17]4 years ago

4 0

The potential energy of the ball changes into kinetic energy.

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A 0.080-kg egg test dummy is fitted with a helmet and attached to a swing. This egg test dummy is pulled back and released, allo

BabaBlast [244]

Answer:

7.8 N

Explanation:

Applying,

I = Ft................. Eqaution 1

Where I = Impulse on the egg test dummy, F = Force on the egg test dummy during the time interval, t = time interval

make F the subject of the equation

F = I/t.................. Equation 2

From the question,

Given: T = -0.39 N.s, t = 0.050 s

Substitute these vales into equation 2

F = -0.39/0.050

F = -7.8 N

Hence the force that act on the egg test dummy is 7.8 N

6 0

3 years ago

How many pounds must a sandbag weigh to test if a safety net can absorb the proper amount of force

inessss [21]

I believe its 400lbs

3 0

3 years ago

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Climate Change

notsponge [240]

Answer:

hope it's helpful please Like me

8 0

3 years ago

Estimate the speed of the water free surface and the time required to fill with water a cone-shaped container 1.5 m high and 1.5

Zolol [24]

Answer:

speed of water is 0.0007138m/s

Explanation:

From the law of conservation of mass

Rate of mass accumulation inside vessel = mass flow in - mass flow out

so, dm/dt = mass flow in - mass flow out

taking p as density

$d \frac{dQ}{dt} = pq_i_n$

where,

q(in) is the volume flow rate coming in

Q = is the volume of liquid inside tank at any time

But,

dQ = Adh

where ,

A = area of liquid surface at time t

h = height from bottom at time t

A = πr²

r is the radius of liquid surface

$r = (1.5/2) \div 1.5$ $h = \frac{h}{2}$

Hence,

$\pi( \frac{h}{2} )^2\frac{dh}{dt} =q_i_n$

$\frac{dh}{dt} = \frac{q_i_n}{\pi (\frac{h}{2})^2 } =\frac{4q_i_n}{\pi h^2}$

so, the speed of water surface at height h

$v = \frac{dh}{dt} =\frac{4q_i_n}{\pi h^2}$

where,

$q_i_n$ is 75.7 L/min = 0.0757m³/min

h = 1.5m

so,

$v = \frac{4 \times 0.0757}{\pi \times 1.5^2} \\\\v = 0.04283m/min$

v = 0.04283 /60

v = 0.0007138m/s

Hence, speed of water is 0.0007138m/s

5 0

3 years ago

A certain kind of glass has an index of refraction of 1.640 for blue light of wavelength 440 nm and an index of 1.595 for red li

DIA [1.3K]

Answer:

0.52°

Explanation:

refractive index for blue light, nb = 1.640

Refractive index for red light, nr = 1.595

Angle of incidence, i = 30°

Let the angle of refraction for blue light is rb and the angle of refraction for red light is rR.

By use of Snell's law for blue light

$n_{b}=\frac{Sin i}{Sin r_{b}}$

$1.64=\frac{Sin 30}{Sin r_{b}}$

$1.64=\frac{0.5}{Sin r_{b}}$

$r_{b}=17.75^{\circ}$

By use of Snell's law for red light

$n_{R}=\frac{Sin i}{Sin r_{R}}$

$1.595=\frac{Sin 30}{Sin r_{R}$

$1.595=\frac{0.5}{Sin r_{R}}$

$r_{R}=18.27^{\circ}$

The angle between the two beams, $\theta =r_{R}-r_{b}$

θ = 18.27° - 17.75°

θ = 0.52°

8 0

3 years ago