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3 years ago

I know what the answer is to part A but not part B

Physics

2 answers:

Olin [163]3 years ago

7 0

Answer:

plz show the questions clearly

cupoosta [38]3 years ago

5 0

You need to write the question

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A watermelon is blown into three pieces by a large firecracker. Two pieces of equal mass m fly away perpendicular to one another

Alenkinab [10]

Answer:

Speed of larger piece is $\dfrac{V\sqrt{2}}{3}$

Explanation:

We apply the principle of conservation of momentum.

The watermelon is initially at rest. The initial momentum = 0 kg m/s in all directions.

After the collision,

Vertical momentum = momentum of piece in y-direction + y-component of momentum of larger piece = $mV + 3mv_{ly}$

Here, $v_{ly}$ is the y-component of velocity of larger piece.

This is equal to 0, since the initial momentum is 0.

$v_{ly}=\dfrac{V}{3}$

Horizontal momentum = momentum of piece in x-direction + x-component of momentum of larger piece = $mV + 3mv_{lx}$

Here, $v_{lx}$ is the x-component of velocity of larger piece.

This is also equal to 0, since the initial momentum is 0.

$v_{lx}=\dfrac{V}{3}$

The velocity of the larger piece, $v_l$ , is the resultant of $v_{lx}$ and $v_{ly}$ . Since they are mutually perpendicular,

$v_l = \sqrt{v_{ly}^2+v_{lx}^2}= \sqrt{\left(\dfrac{V}{3}\right)^2+\left(\dfrac{V}{3}\right)^2}$

$v_l = \dfrac{V\sqrt{2}}{3}$

3 0

3 years ago

A 2.0-Coulomb bead is given 20 Joules of electric potential energy by lifting it from the "ground" to point A. If a second bead

Katen [24]

Answer:

40 J

Explanation:

$c_1$ = 4 C

$c_2$ = 2 C

$U_1$ = 20 J

The potential energy is directly proportional to the charge of the particle

$U\propto c$

$\dfrac{U_2}{U_1}=\dfrac{c_2}{c_1}\\\Rightarrow U_2=\dfrac{U_1c_2}{c_1}\\\Rightarrow U_2=\dfrac{20\times 4}{2}\\\Rightarrow U_2=40\ J$

The potential energy expected is 40 J

4 0

2 years ago

True or false: When your ear detects sound, there is an actual collision of particles from the sound wave that hit your ear drum

VashaNatasha [74]

Answer:

True: For a sound wave to propagate, air particles must be displaced in the direction of propagation - it is the displacement of these particles that causes the eardrum to vibrate and recognize the sound.

4 0

1 year ago

Read 2 more answers

A grasshopper leaps into the air at a 62° angle above the horizontal, and follows a parabolic arc in free fall after it leaves t

harina [27]

Answer:

d. None of the above.

Explanation:

In a parabolic motion, you have that in the complete trajectory the component velocity is constant and the vertical component changes in time. Then, the total velocity vector is not zero.

In the complete trajectory the gravitational acceleration is always present. Then, the grasshopper's acceleration vector is not zero.

At the top of the arc the grasshopper is not at equilibrium because the gravitational force is constantly acting on the grasshopper.

Then, the correct answer is:

d. None of the above.

5 0

2 years ago

A driver averaged 64 mph and took 3½ hours to travel from st. Louis to chicago. Based on this, what is the distance between st.

sammy [17]

Average speed of the driver is given as

$v = 64 mph$