Answer:
v = 14.5 m/s
Explanation:
The Principle Of Conservation Of Mechanical Energy
In the absence of friction, the total mechanical energy is conserved. That means that
Em=U+K is constant, being U the potential energy and K the kinetic energy
U=mgh
[tex]\displaystyle K=\frac{mv^2}{2}[/tex]
The ball with a mass of m=0.8 kg is thrown straight upward from the zero height reference (h=0) and with some speed (v). The potential energy is zero, but the kinetic speed is given by the equation above.
When the ball reaches its maximum height of h=10.7 m, the speed is zero and all the initial kinetic energy was transformed into potential energy, thus:
[tex]\displaystyle \frac{mv^2}{2}=mgh[/tex]
Simplifying by m:
[tex]\displaystyle \frac{v^2}{2}=gh[/tex]
Solving for v:
[tex]\displaystyle v=\sqrt{2gh}[/tex]
Substituting:
[tex]\displaystyle v=\sqrt{2*9.8*10.7}[/tex]
Calculating:
v = 14.5 m/s
Describe the speed of a planet as it revolves around the sun (hint Kepler's second law)
What do these two changes have in common? your breath becoming visible on a cold day building a tower out of magnetic blocks
a
It do
While doing dishes, Zvi drops his
3.0x10 3kg platinum wedding band
into the dishwater, displacing a
volume of 1.40x107m3 of water,
what is the density of the platinum
band?
n
CSS c
sion
im
al
Select one:
a. 2.56x104 kg/m3
b. 1.0x104 kg/m3
Di
c. 0.5x104 kg/m3
IL
d. 2.14x104 kg/m3
IL:
Answer:
d. 2.14 x 10⁻⁴ kg/m³
Explanation:
Density is defined as the mass of an object per unit volume occupied by that object. The formula of density is, therefore, given as follows:
[tex]\rho = \frac{m}{V}[/tex]
where,
ρ = density of platinum band = ?
m = mass of platinum band = 3 x 10³ kg
V = Volume displaced by Platinum band = 1.4 x 10⁷ m³
Therefore,
[tex]\rho = \frac{3\ x\ 10^{3}\ kg}{1.4\ x\ 10^{7}\ m^{3}}\\\\\rho = 2.14\ x\ 10^{-4}\ kg/m^{3}[/tex]
Hence, the correct option is:
d. 2.14 x 10⁻⁴ kg/m³
which planet has a feature called the great dark spot ?
Answer:
Neptune
Explanation:
Answer:
Neptune has that feature. Hope this helped!!! ^D^
Explanation:
Two identical books are placed on a bookshelf. Book number 1 is on a shelf one meter above the floor
Complete question is;
Two identical books are placed on a bookshelf. Book 1 is on a shelf one meter above the floor and Book 2 is on a shelf two meters above the floor.
Which statement best compares the potential energy of the books.
A) Book 2 has twice as much potential energy as Book 1
B) Book 1 has twice as much potential energy as book 2
Answer:
A: Book 2 has twice as much potential energy as Book 1
Explanation:
Formula for potential energy is;
P.E = mgh
Where;
m is mass
g is acceleration due to gravity
h is height
Now, they are identical books and thus will have the same mass while acceleration due to gravity remains constant.
For book 1 which is 1 metre above the floor;
P.E = mg × 1
P.E = mg
For book 2 which is 2 metres above the floor;
P.E = mg × 2
P.E = 2mg
We can see that potential energy for book 2 is twice that of book 1.
Thus,option A is correct.
Answer:
a
Explanation:
If I am in a Ferrari and I travelled for 3 hours at a speed of 270 km/h. How far did I travel?
Use the following formula:
distance velocity x time
a)810km
b)90km
c)810km/hr
Eliza starts from a house and skateboards 10 meters towards the north, then turns back and skateboards 4 meters back to the south. What is Eliza 's displacement from the house?
Answer:
6m
Explanation:
If Eliza starts from a house and skateboards 10 meters towards the north, her distance will be +10m (moving towards positive y direction)
If she then turns back and skateboards 4 meters back to the south, her distance will be -4m (along the negative y direction)
The displacement from the house is 10m - 4m = 6m
Forces in the same pair have equal size but opposite _________ .
The vertical columns in the periodic table are called _____________.
Answer:
The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups. Groups are labeled at the top of each column.
Explanation:
Where on this diagram does the ball have the highest point of gravitational potential energy?
In a catapult, energy is transferred into useful kinetic energy stores what store is the energy in when it is in the catapult
Explanation:
In a catapult, Initially, energy is stored in the form of potential energy which is later converted into kinetic energy.
Potential energy can be stored in the form of elastic potential energy in the case of elastic. It suddenly releases the energy to propel the object into the air.
Answer:
The right answer is "strain" or "strain energy" or "elastic potential energy" or "elastic energy" or "potential energy" or "elastic potential" or "elastic"
Explanation:
Catapults store energy as elastic potential energy.
Walt ran 5 kilometers in 25 minutes, going eastward. What was his average velocity?
0.17 km/min east
0.2 km/min east
5 km/min east
25 km/min east
Answer:
0.2
Explanation:
The average velocity of Walt will be 0.2 km/min east.
We have a boy named Walt.
We have to find the average velocity of Walt.
What is Average velocity ?It is defined as the rate of change of displacement with time. Mathematically -
v = Δx / Δt
According to the question -
Total distance = d = 5 Km
Time = t = 25 minutes
Average velocity = d / t = 5/25 = 0.2 km/min
Therefore, the average velocity of Walt will be 0.2 km/min east.
To solve more questions on Kinematics, visit the link below-
brainly.com/question/21092131
#SPJ2
Fred takes a personal assessment that tells him that he would be great in the Agriculture, Food, and Natural Resources career cluster. What did Fred most likely mark as interests?
A-the justice system, horticulture, raising animals
B-being outdoors, supporting arguments, fixing broken items
C-being outdoors, horticulture, raising animals
D-fixing broken items, researching topics, leadership skills
Answer:
yes it is C
Explanation:
Unlike eukaryotes, prokaryotes do not have:
A. DNA
B. cytoplasm
C. cell walls
D. a membrane bound nucleus
D is the answer
Unlike eukaryotes, prokaryotes have no membrane-bound organelles. This means that they lack a nucleus, mitochondria, and other advanced cell structures
A soapbox derby is to be held on a frictionless hill with a 28 m vertical drop. The track is 300 m long. What is
the change in potential energy of a racecar from start to finish if it and the driver have a combined mass of 113
kg?
Round your answer to a whole number and include correct Sl unit abbreviation.
Answer: -31039 J
Explanation:
Newton’s first law of motion is often called the law of?
Answer:
Newton's first law is often called the law of inertia.
searched it up to verify
Also welcome to brainly
Which element in the 18th column of the periodic table (shown below) has the largest radius?
He
Ar
Xe
Rn
Answer: Rn :)))) no explanation needed
Because of inertia, it will be ____ to stop a larger object than a smaller object if they are both moving at the same speed.
Answer:
harder
heavier objects resist change more than lighter objects.
How is mechanical advantage determined in a pulley system?
Answer:
To calculate the mechanical advantage of a pulley you simply have to count the number of rope sections that support whatever object you are lifting (not counting the rope that is attached to the effort). For example, in a one pulley system the MA is 1. ... The more compound the pulley is the easier the load is to lift.A man is pushing a heavy crate up an inclined plane into the back of semi trailer.What can the man do to make it easier to get the crate up the ramp
Answer:
B) Make the ramp longer
Explanation:
A machine is a device that makes work more easier and faster. A machine also saves time.
A ramp is a simple machine that is used to lift heavy object with a force that is lesser than the actually force needed. A ramp is in the shape of an inclined plane, which makes pushing an object easier than the required force needed.
The formula for a ramp is given by:
Force needed to push * length of the ramp = weight of object * height of ramp.
Force needed to push = (weight of object * height of ramp) / length of ramp
We can see that the force needed is inversely proportional to the ramp length. Hence for a ramp with longer length you need lesser force to raise the object.
What are the scientific principles of physical science
Answer:
Describing and measuring motion. Newton's laws of motion. Forces, weight, and mass. Momentum and conservation of momentum.
The theory of gravity.
Energy, work, and power. Motion, position, and energy.
Explanation:
Answer:
lOl can i have brainliest
Explanation:
The person protected by insurance policy
Answer:
Jake from state famr
Explanation:
Please I need help on question 22 and 23 you don’t have to answer both tho
Answer:
22. is A and 23. is C
Explanation:
4. A dump truck has a mass of 5.50 x 105 kg when loaded and 2.30 x 105 kg when
empty. Suppose two such trucks, one loaded and one empty, crash into each other
at a monster truck show. The trucks are supplied with special bumpers that make
a collision almost perfectly elastic. If the trucks hit each other at equal speeds of
5.00 m/s and the empty truck recoils to the right with a speed of 9.10 m/s, what is
the velocity of the full truck after the collision?
Answer:
V = 0.896 m/s
Explanation:
This is a typical problem of momentum conservation, whic states the following:
m₁V₁ + m₂V₂ = m₁V₃ + m₂V₄ (1)
In this case V₃ and V₄ would be the final velocity of the trucks after the collision.
With the given data let's see what we have:
m₁ = 5.5x10⁵ kg
m₂ = 2.3x10⁵ kg
V₁ = 5 m/s
V₂ = -5 m/s because it's going to the left (-x axis)
V₄ = 9.1 m/s to the right (Meaning is positive)
V₃ = ??
So to calculate V₃ we just need to replace the data into (1) and solve for V₃:
(5.5x10⁵ * 5) - (2.3x10⁵ * 5) = 5.5x10⁵V₃ + (2.3x10⁵ * 9.1)
2.75x10⁶ + 1.15x10⁶ = 5.5x10⁵V₃ + 2.093x10⁶
V₃ = 2.75x10⁶ - 1.15x10⁶ - 2.093x10⁶ / 5.5x10⁵
V₃ = -0.493x10⁶ / 5.5x10⁵
V₃ = -0.896 m/s
With this sign, it means that is going in the same sense of the other truck, but it's going to the left so this would be positive:
V₃ = 0.896 m/sHope this helps
The N car has a weight of 15,000, and its tires are inflated to a pressure of 190 kPa. How much space will the car's tires touch the road?
Answer:
0.079m²
Explanation:
Pressure = Force/Area
Given
Force = 15000N\Pressure = 190kPa = 190,000Pa
Substitute into the formula
Area = Force/Pressure
Area = 15000/190000
Area = 0.079m²
Hence the space covered by the tire will be 0.079m²
difference between MKS and CGS system pls give answer in box
Answer:
Explanation:
MKS stands for Meter, Kilogram and second. In this system of unit mass is given in Kilogram, length in meter and time in second. ... CGS system stands for Centimeter- Gram- Second system. In CGS system, length is measured in centimeters mass is measured in grams and time is in seconds.
Give reason
A person slips over banana peels
Answer:
Well, a fresh off the fruit peel, although smooth by touch, has enough friction to prevent a major slip and fall. ... As the banana peel stays on the ground, it begins to rot and get slimy. If someone were to then step on that rotting, slimy banana peel, they would be in for a decent slip.
Explanation:
Can someone pleaseeee help if you’re correct I’ll give u brainlist
Answer:
Explanation:
The corona virus Vaccine will have some side effects like soreness in injection area but this will only last for a couple of days. I believe the answer is that there is no long term affect.
Weight is the amount of matter in an object true or false
Answer:
False.
Explanation:
Mass is the amount of matter in a given object. Weight is the force acting on an object due to gravity.
Answer:
False
Explanation:
Weight is the act of pulling an object towards the earth surface so weight is a force to amount
have discovered fossils of similar an
different continents. This indicated that continents were on to
7. What did geologists discover?
carth Processes an as earthquakes, onde
8. The continents are parts of enormous sheets of rock called
9. These plates are in constant
Answer:
7
Explanation:
plates
