Answer:
The factors that affect an object's gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.
Hanna tosses a ball straight up with enough speed to remain in the air for several seconds.
A: What is the velocity of the ball when it reaches its highest point?
B: What is its velocity 1 s before it reaches it’s highest point?
C: What is the change in its velocity during this 1-s interval?
D: What is its velocity 1 s after it reaches its highest point ?
E: What is the change in velocity during this 1 s interval?
F: What is the change in velocity during the two second interval?
G: what is the acceleration of the ball during any of these time intervals and the moment the ball has zero velocity?
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)
How can people help stop erosion on beach
Answer:
since erosion is unavoidable the problem becomes discovering ways to prevent it. present beach erosion prevention methods include sand bags,vegetation,seawalls,sand dunes,and sand fences.4. Which are characteristics of an atom? (Choose all that apply.)
1)They come from compounds.
2)They are the largest unit of matter.
3)They are made in stars.
4)They can only be seen by an electron microscope.
Answer:
4.
Explanation:
The characteristic of an atom is as follows:
They can only be seen by an electron microscope.Thus, the correct option for this question is D.
What do you mean by an Atom?An atom may be defined as a particle of matter that uniquely defines a chemical element. Each and every atom consists of a central nucleus that holds positively charged subatomic particles known as Protons along with neutrons.
Apart from protons and neutrons, the negatively charged subatomic particles known as electrons are always revolved around the nucleus of each atom in its orbitals.
According to the context of this question, an atom is the smallest unit of matter which significantly retain all the chemical properties of an element. Thus, the second option is eliminated. They are naturally present not made in stars. So, the option third is also eliminated.
Therefore, the correct option for this question is D.
To learn more about Atoms, refer to the link:
https://brainly.com/question/6258301
#SPJ2
A chemical reaction produces two new substances and each product has a mass of 25 g what was the total mass of the reactants ?
Answer:
The total mass of the reactants is 50 grams.
Explanation:
[tex]25g+25g=50g\\[/tex]
I hope this helps!
transformer is used in rectifier step up and step down voltage?
Answer:
While the use of the type of transformer in a rectifier depends on the voltage requirement or to meet desired operating conditions, a step-down transformer is used mainly to reduce the voltage. It is used to bring the high AC voltage level to a reasonable value or the desired output voltage.
Explanation:
Hope it helps
Correct me if Im wrong
An airplane travels 250 km due east, then turns and travels 180 km [E 60°S]. Determine the resulting travel displacement for this plane.
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
21)
uses a hypothesis to describe the relationship between dependent and independent variables and
results in advances in scientific knowledge.
A)
Engineering method
1
B)
Architectural design
Eliminate
C)
Technological design
D
Scientific investigation
im not sure if im right or not but maybe its "D scientific investigation" but ldk so
A 5000 kg train is traveling at a velocity of 100 m/s and hits another train. The two trains stick together and the new velocity is 50m/s. What is the mass of the second train?
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.
what are triglycerides?
Answer:
an ester formed from glycerol and three fatty acid groups. Triglycerides are the main constituents of natural fats and oils.
Explanation:
HOPE IT HELPS
Answer:
is the answer.......,...............
an object starts from rest with a constant acceleration of 8.0m/s^2 along a straight line.find the average speed for 5 second interval
Answer:
40 m/s
Explanation:
If you multiply the acceleration with time you get the average speed.
Flag An alpha particle (consisting of two protons and two neutrons) is moving in a circle at a constant speed, perpendicular to a uniform magnetic field applied by some current-carrying coild. The alpha particle makes an clockwise revolution every 88 ns. If the speed is small compared to the speed of light, what is the magnitude B of the magnetic field made by the coils
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
A plane flying due north at 191 mph encounters winds that blow the plane due east at 45 mph. Determine the plane's resultant velocity. Record your answers to the nearest tenth.
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!
define THERMODYNAMICS
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.
You are out bowling with your friends. Where does the energy come from that will cause the ball to roll down
the alley? Where does the energy in the ball go after it starts rolling down the alley and eventually stops? Would
it be better to choose a heavy or light bowling ball to get a strike?
Answer:
1. Comes from the human us
2. Transfered into the alley floor or if hits a pin transfered to the pin.
3. Heavy
What happens to the direction of the line joining when the object slows down ?Explain the observations
Answer:
it will be curved as in deceleration
Explanation:
A350kg car is moving 16m/s north and collides with a 650kg truck going 11m/s east.if it lock bumpers,how fast and in what direction will they are going after the collision
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
can someone pls help meee
Answer:
A
Explanation:
PLEASE MARK AS BRAINLIEST!!!!!
The graph shows the distribution of the amount of chicken (in ounces) that adults eat in one sitting. The distribution is
approximately Normal, with a mean of 8 ounces and a standard deviation of 1.2 ounces.
Chicken Consumption
What percentage of adults eat between 9.2 and 11.6 ounces of chicken in one sitting?
Answer: 15.85
Explanation:
E21
If you throw a ball up into the air and it reaches its original height after 6 seconds, calculate how high above its original position the ball reached. (Answer to two decimal places).
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]
When do you know if Respect is being shown? If there is discrimination? Cite some indicators
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
A _ system is one in which one subsystem provides services to another subsystem.
A large system is one in which one subsystem provides services to another subsystem.
What is a large system?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.
What is a subsystem?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
Study the venn diagram given below carefully. Which of the following can be placed at B? Options: Clay _ Paper _ Water_ Nitrogen.
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.
You attach a cart with a mass of 0.92 kg to a spring and compress the cart-
spring system. The spring constant for the spring is 130 N/m. Your objective is
to propel the cart with a velocity of 1.4 m/s along a frictionless surface. How
need to compress the spring in order to meet your target velocity?
far do
you
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
By any method you choose, determine your average speed of walking. How do you results compare with those of your classmates?
joji sanctuary
slow dancing in the dark
happier by olivia
filipino artist like john cena
Which of these sets of thesis-antithesis IS NOT appropriate according to the instructions given by your instructor because it is too broad?
Which type of heat transfer takes place in gases by the movement of particles through a medium?
Answer: Convention
Explanation: Convention is pretty well known for being a process that transmits heat from one place to another place with the movements of heated particles. I got this answer from my notebook during my chemistry class.
Hope this answer helps!
What is the tension in the string?
(I’m really having a hard time understanding this topic, and my professor isn’t helping much, so any extra explanation are greatly appreciated). The angles are 54.9205°.
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
jeff walked 3 blocks south, 5 blocks west, and then another 3 blocks south. which diagram has the correct vectors for jeff's walk and his displacement? remember, the starting point of each part of the trip is the beginning of the arrow and the ending point is the pointed end of the arrow.
Answer:
The one that looks similar to this one.
Explanation:
Blue vectors are path
Green vector is total displacement
Gawain sa Pagkatuto Buang 1: Nakikita mo ba ang mga ito saljuidie di of the di hp ku di of 1. ataupie. pidi bek gagah kitoe Iek song di
I am not able to understand..
What are you saying?
Calculate the acceleration of the object as it slides down the incline plane.
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