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Ganezh [65]
3 years ago
12

You serve a volleyball with a mass of 0.77 kg. The ball leaves your hand with a velocity of

Physics
1 answer:
dimaraw [331]3 years ago
7 0
<h2>Given :</h2>

  • mass (m) = 0.77 kg

  • velocity (v) = 2.33 m/s

<h2>Solution :</h2>

\boxed{ \mathrm{Kinetic  \: Energy =  \frac{1}{2} m {v}^{2} }}

  • \dfrac{1}{2}  \times 0.77 \times (2.33) {}^{2}

  • \dfrac{418.0253}{2}

  • 209.01265  \: \: joules

  • \mathrm{209.01  \: \: joules} \:  \:  \: (approx)

_____________________________

\mathrm{ \#TeeNForeveR}

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The length of a wooden rod is 25.5 cm. What is this length in:<br>(a) millimetres?<br>(b) metres?​
larisa86 [58]

Answer:

(a)255mm \\ (b)0.255m

Explanation:

(a)1cm = 10mm \\ 25.5cm = x

Cross multiply

1x = 25.5 \times 10 \\ x = 255mm

(b)100cm = 1m \\ 25.5cm = x

cross multiply

100x = 25.5 \\  \frac{100x}{100}  =  \frac{25.5}{100}  \\ x = 0.255m

hope this helps

brainliest appreciated

good luck! have a nice day!

4 0
4 years ago
Read 2 more answers
For the Doppler Effect to occur, ____. Question 25 options: the sound source must be moving the listener must be moving both sou
Aleonysh [2.5K]

Answer: A) <u>Either source or listener must be moving.</u>

Explanation:

Frequencies can shift if an observer is moving relative to the wave’s source. This type of shift is called the Doppler effect (often used to analyze sounds). Think about the sound you hear when a police siren passes you and drives away; as the car increases its distance from you, the pitch of its sound becomes lower. This is because each wave is emitted from a greater distance, causing the wavelength to spread out or increase relative to you, the listener.

7 0
3 years ago
An earthquake is the shaking and trembling that results from the movement of rock beneath Earth's surface. Earthquakes most comm
Vladimir [108]

Answer:

See Explanation

Explanation:

Solution:-

Earthquakes happen when rock below the Earth's surface moves abruptly. Usually, the rock is moving along large cracks in Earth's crust called faults. Most earthquakes happen at or near the boundaries between Earth's tectonic plates because that's where there is usually a large concentration of faults. Some faults crack through the Earth because of the stress and strain of the moving plates. Other, large faults are the boundary between plates, such as the San Andreas Fault on the North American west coast.

Since earthquakes happen along faults and most faults are near plate boundaries, the yellow dots in the animation are found mostly at the boundaries between Earth's tectonic plates.

A subduction zone is the biggest crash scene on Earth. These boundaries mark the collision between two of the planet's tectonic plates. The plates are pieces of crust that slowly move across the planet's surface over millions of years.

Where two tectonic plates meet at a subduction zone, one bends and slides underneath the other, curving down into the mantle. (The mantle is the hotter layer under the crust.)  

Tectonic plates can transport both continental crust and oceanic crust, or they may be made of only one kind of crust. Oceanic crust is denser than continental crust. At a subduction zone, the oceanic crust usually sinks into the mantle beneath lighter continental crust. (Sometimes, oceanic crust may grow so old and that dense that it collapses and spontaneously forms a subduction zone, scientists think.)

7 0
3 years ago
There are two different size spherical paintballs and the smaller one has a diameter of 5 cm and the larger one is 9 cm in diame
slavikrds [6]

Answer:

145.8 cm³ of paint

Explanation:

d₁ = Smaller diameter paintball = 5 cm

d₂ = Larger diameter paintball = 9 cm

V₂ = Volume of larger diameter paintball

Volume of smaller diameter paintball

V_1=\frac{4}{3}\pi r_1^3\\\Rightarrow V_1=\frac{4}{3}\pi \left(\frac{d_1}{2}\right)^3\\\Rightarrow V_1=\frac{4}{24}\pi d_1^3

Similarly

V_2=\frac{4}{24}\pi d_2^3

Dividing the above two equations, we get

\frac{V_1}{V_2}=\frac{d_1^3}{d_2^3}\\\Rightarrow V_2=\frac{V_1}{\frac{d_1^3}{d_2^3}}\\\Rightarrow V_2=\frac{28}{\frac{125}{729}}\\\Rightarrow V_2=163.296\ cm^3

∴ The larger one hold 163.296 cm³ of paint

5 0
3 years ago
Carlos conduce su automóvil a 70 Km/h, mientras que Luis maneja una camioneta a la misma velocidad
DIA [1.3K]

Answer:

shsissjsisjuai

Explanation:

abajxyxaiaodkxfk

4 0
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