HELP PLEASE

......................................................

Answer:

In the free fall motion we have that the acceleration is constant and produced by gravity, this acceleration has a magnitude of 32 ft/s2 or 9.8 m/s2 depending on the units you are working with. This means that every second the speed changes a magnitude of 32 ft/2, the velocity will depend of whether the ball is going upward (positive) or downward (negative).

A) At the highest point the ball stops to start the descend, here v=0 ft/s

B) +32 ft/s. The vector is going up, in the next second the velocity is going to be 0 (negative acceleration)

C) V=vf-vo=0-32=-32 ft/s is the constant change in velocity in projectile motion

D) -32 ft/s. The vector is pointing downward

E) V=vf-vo=-32-0=-32 ft/s is the constant change in velocity in projectile motion, 32 ft/s per second

F) Delta V=vf-vo=-32-32=-72 ft/s

g) gravity acceleration is constant 32 ft/s2 (pointing downward vector)

Answer:

The mass of the gold bar is 1,544 g

Explanation:

Answer:

it will be curved as in deceleration

Explanation:

Answer:

F = - K X     force exerted by compressed spring

F X = 1/2 M V^2    energy (work) required to produce a speed V for mass M

K X * X  = 1/2 M V^2      direction of F is the same as that of V

X^2 = M V^2 / K      combining  terms

X = (M / K)^1/2 V      

X = (.92 / 130)^1/2 * 1.4 = .118 m

Thermodynamics is the branch of physical science that deals with the relations between heat and other forms of energy (such as mechanical, electrical, or chemical energy), and, by extension, of the relationships between all forms of energy.

(1) The speed with which the star's light will pass you is 3 x 10⁸ m/s.

(2) The speed of the other spaceship is -2.943 x 10⁸ m/s.

The given parameters;

(1)

Since you are travelling away from the star (same direction), relative to a third observer, the speed at which the star's light will pass you is calculated using Lorentz velocity addition.

[tex]u = \frac{u'+ v}{1 + \frac{v}{c^2} u'} \\\\u = \frac{c+(-0.8c)}{1 + \frac{-0.8c}{c^2} (c)}\\\\u = \frac{c-0.8c}{1- \frac{0.8c}{c} } \\\\u = \frac{0.2c}{0.2} = c = 3\times 10^{8} \ m/s[/tex]

Thus, the speed with which the star's light will pass you is 3 x 10⁸ m/s.

(2) The speed of the spaceship approaching = 0.84 c

Since you are travelling in opposite direction to second spaceship, relative to a third observer (frame of reference), the speed of the other spaceship is calculated using Lorentz velocity addition.

[tex]u = \frac{u' + v}{1 + \frac{v}{c^2}u' } \\\\u = \frac{-0.84c - 0.8c}{1 + \frac{(-0.8c)}{c^2}(-0.84c) } \\\\u = \frac{-1.64c}{1.672} = -0.981c \\\\u = -0.981 \times 3\times 10^{8} = -2.943 \times 10^{8} \ m/s[/tex]

Learn more here:https://brainly.com/question/14121617

Peace and violence are the indicators of the society.

Respect is shown if we see a people as a person and not as a toy. If we stop  criticizing and judging by just looking at them than the other person also gives us respect which leads to peace and harmony in the society.

If there is discrimination and no respect of other people's feeling then there is violence and disharmony in the society so we can conclude that peace and violence are the indicators of the society.

Learn more: https://brainly.com/question/25002091

Answer:

40 m/s

Explanation:

If you multiply the acceleration with time you get the average speed.

Answer:

0.788 m/s²

Explanation:

Ff = 0.1 × 5 kg × 10 m/s² × cos 38°

Ff = 5 N × 0.788

Ff = 3.94 N

F = m × a

3.94 N = 5 kg × a

a = 3.94 N / 5 kg

a = 0.788 m/s²

Answer:

1. Comes from the human us

2. Transfered into the alley floor or if hits a pin transfered to the pin.

3. Heavy

I am not able to understand..

What are you saying?

Answer:

The one that looks similar to this one.

Explanation:

Blue vectors are path

Green vector is total displacement

Answer:

m = 4 At Mass units = 4 * 1.66E-27 kg = 6.64E-27 kg  mass of particle

q = 2 * 1.60E-19 C = 3.2E-19 C     total charge of alpha particle

T = 8.8E-8 s     period of 1 revolution

F = q V B      magnetic force

F = m V^2/ R     centripetal acceleration

q V B = m V^2 / R

B = m V / (q * R)

T = 2 pi R / V     time for 1 revolution

R = V T / (2 pi)

B = (m V / q) * 2 pi / (V T) = 2 pi m / (q T)

B = 2 pi * 6.64E-27 / (3.2E-19 * 8.8E-8) = 1.48

B = 1.48 W/m^2

Answer:

Explanation:

Conservation of momentum is used to solve

Unfortunately we have a missing piece of information such as the initial velocity of the unknown mass train.

If we ASSUME that the second train is at rest

5000(100) + m(0) = 5000(50) + m(50)

which means m = 5000 kg

However, I'll show you the importance of knowing that initial velocity by finding it assuming the other answers are valid

if m = 15000 kg

5000(100) + 15000(v₀) = (5000 + 15000)(50)

v₀ = 33 ⅓ m/s

if m = 10000 kg

5000(100) + 10000(v₀) = (5000 + 10000)(50)

v₀ = 25 m/s

if m = 8000 kg

5000(100) + 8000(v₀) = (5000 + 8000)(50)

v₀ = 18.75 m/s

So you can see why I had to assume an initial velocity. Any of the masses could work if the initial velocity is chosen correctly.

Answer:

water and nitrogen can be place at B

The B loop is the element that can be liquid, cas or solid. Water can have three states : solid (ice), liquid, or gas (as a vapor). The same can be said with nitrogen, it's a gas at room temperature, and it also can be a liquid or solid.

Answer:

π/21600 rad /s.

Answer:

Below

Explanation:

For these types of questions, you should draw out your triangles and resultant vectors.

For this, we can use the pythagorean theorem to solve this :

     vpf^2 = vpi^2 + vw^2

     vpf^2 = 45^2 + 191^2

     vpf = [tex]\sqrt{38507[/tex]

     vpf = 196.2294

     vpf = 200 mph

Now we need to find the angle of the plane's direction using soh cah toa

     Tan(x) = O / A

              x = tan^-1(191/45)

              x = 76.74

              x = 77 degrees

Therefore, the plane's result velocity is 200 mph [ E 77 N ]

Hope this helps!

Answer:

A

Explanation:

im not sure if im right or not but maybe its "D scientific investigation" but ldk so

Hi there!

We can begin by breaking the problem up into two directions, horizontal and vertical.

The collision is perfectly inelastic since the two objects stick, so:

1 = car

2 = truck

Momentum in the east direction (positive and horizontal, car NOT going in this direction has a velocity of 0 m/s):

m2v2 = (m1 + m2)v

(650 · 11) / (350 + 650) = 7.15 m/s

Momentum in the north directions (only initial is the northward velocity of the car):

m1v1 = (m1 + m2)v

(350 · 16)/(350 + 650) = 5.6 m/s

Find the overall velocity using the pythagorean theorem:

√(5.6²) + (7.15²) = 9.08 m/s

Find the direction using trigonometry. Use tangent in this situation:

tan Ф = O/A

tan⁻¹(5.6/7.15) = 38° north of east

Answer: 15.85

Explanation:

E21

Explanation:

Assuming that there is no air resistance, the given time means that the ball reached its maximum height 3 seconds after throwing it upwards so we can solve its

maximum height by solving for [tex]v_{0y}[/tex] first:

[tex]v_y = v_{0y} - gt \Rightarrow v_{0y} = gt[/tex]

[tex]v_{0y} = (9.8\:\text{m/s}^2)(3\:\text{s}) = 29.4\:\text{m/s}[/tex]

Now that we know [tex]v_{0y},[/tex] we can now solve for [tex]y_{max}:[/tex]

[tex]y_{max} = v_{0y}t - \frac{1}{2}gt^2[/tex]

[tex]\:\:\:\:\:\:=(29.4\:\text{m/s})(3\:\text{s}) - \frac{1}{2}(9.8\:\text{m/s}^2)(3\:\text{s})^2[/tex]

[tex]\:\:\:\:\:\:=44.1\:\text{m}[/tex]

Answer:

The total mass of the reactants is 50 grams.

Explanation:

[tex]25g+25g=50g\\[/tex]

I hope this helps!

A large system is one in which one subsystem provides services to another subsystem.

This is a type of system that contains many subsystems. The subsystem provides independent services to the larger by communicating, or interacting with each other.

A subsystem is smaller units of a large system, designed to perform specific task in the large system.

Thus, a large system is one in which one subsystem provides services to another subsystem.

Learn more about subsystems here: https://brainly.com/question/24579841

If you look at the sketch I drew for the earlier part of this question, you'll see that, with respect to the positive horizontal (i.e. directly to the right), T₁ makes an angle of 180° - 54.9205° ≈ 125°, while T₂ makes an angle of 54.9205° ≈ 55°.

Split up the force acting on the block into vertical and horizontal components. We have

• net vertical force

∑ F = T₁ sin(125°) + T₂ sin(55°) - mg = 0

where m = 0.56 kg, and

• net horizontal force

∑ F = T₁ cos(125°) + T₂ cos(55°) = 0

Both net forces are 0 because the block is suspended in equilibrium.

Notice that cos(125°) = -cos(55°), so the second equation tells you that T₁ = T₂ and that the tensions in either string are the same. Also, sin(125°) = sin(55°).

Then in the first equation, we have

T₁ sin(125°) + T₂ sin(55°) - mg = 0

2 T₁ sin(55°) = mg

T₁ = mg/(2 sin(55°))

T₁ = (0.56 kg) (9.8 m/s²)/(2 sin(55°))

T₁ ≈ 3.35 N

Answer:

388.56km[E13degS]

Explanation:

Δdx = Δd1x + Δd2x

Δdx = 250km [E]+ 180sin(60) [E]

Δdx = 405.88 km [E]

Δdy = Δd1y + Δd2y

Δdy = 0 + 160cos(60) [S]

Δdy = 90km [S]

Δdt = √(Δdx)^2+(Δdy)^2

Δdt = √164738.57+8100

Δdt = 398.85km

tanθ = Δdy/Δdx

tanθ = 90/388.56

θ = tan-1(90/388.56)

θ = 13.04 deg

Answer:

B. When an energy transformation happens, no energy is destroyed

or created.

Explanation:

joji sanctuary

slow dancing in the dark

happier by olivia

filipino artist like john cena

Answer: