1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dangina [55]
3 years ago
10

A 2kg watermelon is dropped from a 4m tall roof a) use the appropriate kinematic equations to determine the instantaneous veloci

ty of the watermelon as its strikes the ground below?
Physics
1 answer:
Ivenika [448]3 years ago
6 0

Answer:

8.85m/s

Explanation:

The potential energy the watermelon held before dropping is Ep=mgh=2*9.8*4=78.4J.

When it strikes the ground, all of its Ep will transfer into Ek, so 1/2*m*v^2=78.4.

We already knew that m=2, so insert that in, we will get the V^2=78.4 m/s, V=8.85 m/s

You might be interested in
My sis needs help with this and I don't wanna help her!!! Can you guys help her????
Katena32 [7]

Answer and Explanation:

Cup 1. The ice cubes are in a solid state.

Cup 2: The cup has water that is liquified.

Cup 3: The cup is empty and only contains free floating air particles.

***If you found my answer helpful, please give me the brainliest. :) ***

7 0
3 years ago
Read 2 more answers
Describe how the sound from the radio reaches all parts of the room?? (2m)
Evgen [1.6K]
Sound waves travel around the boxed room causing them to bounce off the nearest walls to the end of the room
5 0
3 years ago
The speed of sound in air is 331 m/s. what is the plane's speed in terms of the speed of sound?
Zina [86]
<span>The initial speed, u of plane in terms of velocity of sound which may be taken as U
u=142/331=0.429*U
It crosses the sound barrier after says t seconds then we have 331-142=23.1*t or t is given 8.18 s exactly t=9/11s.
After 18 seconds the plane will traveling with velocity V
V=142+18*23.1=557.8 m/s==1.685*U</span>
5 0
3 years ago
In general, the time it takes from when in interstellar cloud fragment first begins collapsing until it gives birth to a main-se
erik [133]

Answer:

longer for less massive stars.

Explanation:

A star is a giant astronomical or celestial object that is comprised of a luminous sphere of plasma, binded together by its own gravitational force.

It is typically made up of two (2) main hot gas, Hydrogen (H) and Helium (He).

Some of the examples of stars are Canopus, Sun (closest to the Earth), Betelgeus, Antares, Vega etc.

Generally, the time taken for the collapse of an interstellar cloud fragment to the period (time) when a main-sequence star is given birth to, is usually longer for less massive stars.

This ultimately implies that, stars that are not so massive or big in size are transformed from interstellar cloud fragment to a main-sequence star is lesser.

6 0
2 years ago
What is the wavelength of a wave with the frequency of 330 Hz and a speed of 343 m/s
user100 [1]

Answer:

The wavelength of a wave with the frequency of 330hz and a speed of 343m/s would be 1.04m

Explanation:

You can get the wavelength of a wave by dividing the speed of the wave by its frequency, which in this case would be:

343/300, which as a decimal number, it'd be 1.04.

I hope I helped you, and a "Brainliest" is always appreciated! ☺

7 0
3 years ago
Other questions:
  • Show that rigid body rotation near the Galactic center is consistent with a spherically symmetric mass distribution of constant
    13·1 answer
  • If it takes a ball dropped from rest 2.069 s to fall to the ground, from what height h was it released?
    5·1 answer
  • What is the highest pHoney bees beat their wings, making a buzzing sound at a frequency of 2.3 × 102 hertz. What is the period o
    13·1 answer
  • Be sure to answer all parts. Compare the wavelengths of an electron (mass = 9.11 × 10−31 kg) and a proton (mass = 1.67 × 10−27 k
    11·1 answer
  • What can be found in every skeletal muscle?
    15·2 answers
  • What process occurs when all of the energy from light waves is transferred to a medium?
    9·2 answers
  • Vector A with arrow, which is directed along an x axis, is to be added to vector B with arrow, which has a magnitude of 5.5 m. T
    8·1 answer
  • How much power is needed to lift the 200-N object to a height of 10 m in 4 s?
    9·1 answer
  • Explain how the particles of solids move
    12·1 answer
  • What purpose does a generator serve in a power plant?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!