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3 years ago

9

When the energy of a sound wave is transferred to a particle of a medium and causes it to vibrate and generate heat the sound wa

ve is
A. Reflected
B. Refracted
C. Absorbed
D. Transmitted

1 answer:

skelet666 [1.2K]3 years ago

3 0

The answer of this said question is d

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John Purchased 6 Kg And 500 Kg of suger and 12kg and 400g of rice.what is the total mass of the suger and rice that he purchased

gulaghasi [49]

Answer:

Total Mass = 18 kg 900 gram

Explanation:

Given:

Mass of sugar buy = 6 kg 500 gram

Mass of rice buy = 12 kg 400 gram

Find:

Total Mass

Computation:

Total Mass = Mass of sugar buy + Mass of rice buy

Total Mass = 6 kg 500 gram + 12 kg 400 gram

Total Mass = 18 kg 900 gram

8 0

3 years ago

Determine the kinetic energy of a 625-kg roller coaster car that is moving with a speed of 10 m/s.

abruzzese [7]

Hi there!

Kinetic energy can be calculated using the following:

$\large\boxed{KE = \frac{1}{2}mv^2}}$

Where:

KE = Kinetic energy (J)

m = mass (kg)

v = velocity (m/s)

Plug in the given values:

$KE = \frac{1}{2}(625)(10^2) = \boxed{31250J}$

5 0

2 years ago

Read 2 more answers

Describe what happens when u mix hot water with cold

svetoff [14.1K]

The hot immediately increase the temperature of the cold water until they both reach equilibrium state.

6 0

3 years ago

A Viking ship roller coaster at the fair has a mass of 36,000 kg. If at its peak it reaches a height of 20 m off the ground, how

adell [148]

Answer:

7056 kJ

Explanation:

Given that,

Mass of a ship roller coaster is 36,000 kg.

It reaches a height of 20 m off the ground

We need to find the gravitational potential energy does it have. The formula for the gravitational potential energy ios given by :

E = mgh

g is acceleration due to gravity

E = 36,000 kg × 9.8 m/s² × 20 m

= 7056000 J

or

E = 7056 kJ

So, it will have 7056 kJ of gravitational potential energy.

8 0

3 years ago

Fine grains of beach sand are assumed to be spheres of radius 64.8 µm. These grains are made of silicon dioxide which has a dens

Nutka1998 [239]

Answer:

1) Mass of the grain is $2.9632\times 10^{-9} kg$ .

2) 0.08901 kg of sand would have surface area equal the surface area of the cube.

Explanation:

1) Radius of the grain,r = 64.8 µm = $6.48\times 10^{-5}m$

Volume of the sphere = $\frac{4}{3}\pi r^3$

Volume of the grain of a sand:

$V=\frac{4}{3}\times \pi r^3=\frac{4}{3}\times 3.14\times (6.48\times 10^{-5} m)^3$

$V=1.1397\times 10^{-12} m^3$

Density of a grain of sand = $d=2600 kg/m^3$

Mass of a grain of a sand = M

$d=2600 kg/m^3=\frac{M}{1.1397\times 10^{-12} m^3}$

$M=2.9632\times 10^{-9} kg$

Mass of the grain is $2.9632\times 10^{-9} kg$ .

2) Surface are of sphere: $4\pi r^2$

Surface area of a grain:

$A=4\times 3.14\times (6.48\times 10^{-5}m)^2$

$A=5.2766\times 10^{-8} m^2$

Length of the cube = a = 0.514 m

Total surface area of cube ,A'= $6a^2$

$A'=6\times (0.514 m)^2=1.5851 m^2$

let the number grains with area equal to total surface area of cube be x.

$A'=A\times x$

$x=\frac{1.5851 m^2}{5.2766\times 10^{-8} m^2}=3.003\times 10^7$

Volume of x number of grains :V'

$V'=V\times x$

$V= 1.1397\times 10^{-12} m^3\times 3.003\times 10^7$

$V'=3.4236\times 10^{-5} m^3$

Mass of $3.4236\times 10^{-5} m^3$ of sandL:

= $3.4236\times 10^{-5} m^3\times 2600 kg/m^3=0.08901 kg$

0.08901 kg of sand would have surface area equal the surface area of the cube.

8 0

3 years ago