Answer:
4.9949
Explanation:
M = 3 kg
P.E = 147 joules
G = 9.81 ms^-2
H = ?
P.E = MGH
147 = 3 x 9.81 x H
147 = 29.43H
147/29.43 = 29.43H/29.43
4.9949 = H
:. H = 4.9949
help!! i need to know which letter has the highest speed, the middlest speed and the lowest speed!!
Answer:
From highest speed to lowest speed:
A, C, B
Explanation:
On a position time graph, the slope of a line would represent the velocity, since the rate of change represents how many meters traveled in the given time.
The larger the slope, the faster the velocity; the steeper the line, the faster the speed.
Since line B is negative, you know that velocity is negative so it automatically has the lowest speed.
Out of lines A and C, since A is steeper, you know that A has a faster speed.
In conclusion:
A is the fastest
C is the middle
B is the slowest
A baseball is thrown upward at 20m/s. At what time is the ball 10m above the point at which it was released?
Answer:
0.583 seconds
Explanation:
We are dealing with free-fall motion, which has a constant acceleration of -g, acceleration due to gravity, so we can use a constant acceleration equation to solve this problem.
List out known variables and the variable that we want to solve for:
v_0 = 20 m/sa = -9.8 m/s² Δx = 10 mt = ?Find the kinematic equation that contains all four of these variables:
Δx = v_0 t + 1/2at²Plug known values into the equation.
10 = 20 t + 1/2(-9.8)t²Distribute 1/2 inside the parentheses.
10 = 20t - 4.9t²Set the equation equal to 0 and rearrange the terms so they are in descending degree order.
0 = -4.9t² + 20t - 10Factor this equation by using the quadratic formula. You should get:
t = 3.498 s, t = 0.583 sLet's look at these numbers within the context of the problem. If the ball's speed is 20 m/s, then after 1 second, it would reach a height of 20 m.
However, we want to find the time that it would take the ball to reach a height of 10 m, which is half of 20 m. Therefore, the time to reach 10 m should be around 0.5 seconds.
t = 0.583 is the closest to 0.5 seconds, and it fits within the context of the problem. Therefore, the answer is 0.583 seconds.
What are two reasons that digital storage of data is so reliable?
Answer:memory chips don’t not break and digital data can usually can be recovered even if storage device stops working
Explanation:
Answer:
Explanation:
Memory chips are sturdy and it is usually possible to recover data from a memory chip even when the device containing it is broken
will give brainliest if they answer is correct
Answer:
When a motorcycle takes a turn, centrifugal force—in this case, friction between the tires and the road—pushes it towards the center. This basic physics explains why riders can lean into turns without falling. However, when an outside force disrupts or unbalances these forces, the vehicle crashes. that is the only one that I can answer for you. :)
Answer:
Explanation:
This question needs more information (Sedan)
The argument against your claim (what the other side would say if they disagreed with your claim.) is:
Group of answer choices
counterclaim
author's purpose
opinion
argument
Answer:
a counterclaim
Explanation:
authors purpose is what an author wrote somthing for
opinion is someones thoughts or "side" on a argument
an arguement is a battle of opinions if that makes sense
An astronaut weighs 107 Newtons when he stands on the surface of Europa on one of Jupiter's moons if europa's gravitational acceleration is 1.3 m s squared what is the astronauts Mass
Answer:
I think it would be 179kb
Which has a charge with the greatest magnitude?
An object with charge 0
An object with charge -2
An object with charge-3
An object with charge +2
Answer:
an object with charge -3
What is the kinetic energy of a 0.5 kg puppy that is running 1.5m/s
Answer:
0.5625 Joules
Explanation:
The equation to calculate kinetic energy is:
[tex]KE = \frac{1}{2}mv^2[/tex]
So, plug in all given info and calculate:
[tex]KE = \frac{1}{2}(0.5)(1.5)^2 = 0.5625J[/tex]
And that's your answer! :)
HELP ASAP!! WILL TRY TO GIVE BRAINLIEST
Describe chromatin and how it changes.
Answer:
Chromatin is a mass of genetic material composed of DNA and proteins that condense to form chromosomes during eukaryotic cell division. Chromatin is located in the nucleus of our cells . The primary function of chromatin is to compress the DNA into a compact unit that will be less voluminous and can fit within the nucleus.
I hope this helps
Explanation:
Answer: Me again! Chromatin is a complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells. Nuclear DNA does not appear in free linear strands; it is highly condensed and wrapped around nuclear proteins in order to fit inside the nucleus. Chromatin exists in two forms.
Explanation: Hope this helps! Happy Holidays!
what is the avarage speed during kick 1
_____ is the force of attraction between objects that have mass.
1Which of the following components of blood would you expect to see in higher
numbers at a site of infection?
a. Red Blood Cells
b. White Blood Cells
C. Platelets
d. Plasma
A sea turtle must crawl up a beach to lay eggs. Ignoring friction, what work must a 140-kg turtle do in lifting herself 2.5 m above the level of the sea?
Answer:
3500joules of work
Explanation:
Work done = Force×,distance
Given
Focrce= mass ,× acceleration = 140×10 = 1400N
Distance moved = 2.5m
Workdone = 1400×2.5
Work done = 140×25
Workdone = 3500Joules
HELP ASAP!!!!!!! PLEASE WILL GIVE BRAINLIEST
Define organelles and explain their general function in a cell
Answer:
They carry out essential functions that are necessary for the survival of cells – harvesting energy, making new proteins, getting rid of waste. Hope this helps!
Explanation:
I organelles is a specialized subunits with a specific cell, their general function is to store genetic information
1. The lamp in your room is marked (100
W, 220 V). What do these readings mean?
Calculate, in J and in kWh, the electric ener-
gy consumed for 5 hours of lighting. Deduce
the monthly cost if the price of one kWh is
55 L.L.
Answer:
See the answers below
Explanation:
The data of 100W means power, and the other data of 220V means voltage, that is to say that bulb serves to work at a voltage of 220V100W datum means power.
J means work that is given in Joules [J], we must remember that power is defined as the relationship between work at a certain time, therefore we can determine work by means of the following expression.
[tex]P=W/t\\[/tex]
where:
P = power [Watt]
W = work [J]
t = time [s]
[tex]W=P*t\\W=100*5[hr]*[\frac{3600s}{1hr} ]\\W=1800000[J] = 1.8[MJ][/tex]
Now the electric cost.
[tex]0.1[kW]*5[hr]*55\frac{LL}{1kwhr} =27.5[LL][/tex]
How are water scarcity and water pollution related?
Water pollution contributes to water scarcity.
Water pollution is a solution to water scarcity.
Water scarcity is a solution to water pollution.
Water scarcity contributes to water pollution.
Answer:
A. Water pollution contributes to water scarcity.
Explanation:
Water pollution occurs when materials are disposed in water body, thus making it unfit for use. A polluted water can not be used for various purposes that water can be used for. Examples include: recreation, drinking, washing etc.
Water scarcity is the situation when available water is not sufficient for the use of organisms in a community. This majorly occurs in arid area.
Thus, since a polluted water renders water to be useless, therefore water pollution contributes to water scarcity.
Answer:
Water contributes to water scarcity
Explanation:
pls nobody has ever given me brainiest pls give me brainliest
BEARS
Timothy made the model shown below to represent the steps in the formation of a torrado
Severe
thunderstorm
High winds
push
clouds
Rotation
within
thunderstorm
O2010 FLVS
Which of these best fits the empty cell in Timothy's model? (2 points)
O cool, dry air forms clouds
O cool, dry air meets warm, moist air
O water vapor condenses in douds
O water vapor evaporates from ocean
Answer: cool, dry air meets warm, moist air
Explanation:
Just did the test, it was correct
Answer:
cool, dry air meets warm, moist air
Explanation:
I took it and I pass
Which one is it i need this for my credit recovery
A 5 kg rifle fires a 15 g bullet at a muzzle velocity of 600 m/s. Find the recoil velocity of
the rifle
Answer:
v₂ = 1.8 [m/s]
Explanation:
To be able to solve this problem we must raise the principle of conservation and quantity of movement. It is going to study the momentum before and after the firing of the rifle.
P = m*v
where:
P = momentum [kg*m/s]
m = mass [kg]
v = velocity [m/s]
Now we need to analyze the moment before and after the shot.
[tex](m_{1}+m_{2})*v_{1}=-(m_{1}*v_{2})+(m_{2}*v_{3})[/tex]
where:
m₁ = mass of the rifle = 5 [kg]
v₁ = velocity of the rifle and the bullet before firing = 0 (no movement)
m₂ = mass of the bullet = 15 [g] = 0.015 [kg]
v₂ = velocity of recoil [m/s]
v₃ = velocity of the bullet after firing = 600 [m/s]
Now replacing:
[tex](5+0.015)*0 = -(5*v_{2})+(0.015*600)\\9 = (5*v_{2})\\v_{2}=1.8 [m/s][/tex]
Momentum is the product of mass and velocity. The recoil velocity of the rifle weighing 5 kg is 1.8 m/s.
What is conservation of momentum?According to the law of conservation of momentum if two objects are in contact with each other then for that system of the two objects the momentum of the object before will be equal to the momentum of the object after the collision.
GIven to us
Mass of the rifle, M = 5 kg
Mass of the bullet, m = 15 g = 0.015 kg
Velocity of the bullet afterwards, v₂ = 600 m/s
We know that according to the law of conservation of momentum, the momentum of the bullet and riffle before shooting will be equal to the momentum of the bullet and riffle after shooting.
[tex]Mu_1 + mu_1 = Mv_1 + mv_2[/tex]
Since, before shooting the bullet was in the riffle and the velocity of both was 0,
[tex]M(0) + m(0) = Mv_1 + mv_2\\\\-Mv_1 = mv_2\\\\v_1 = -\dfrac{m \times v_2}{M}[/tex]
Substitute the values,
[tex]v_1 = -\dfrac{0.015 \times 600}{5}\\\\v_1 = -1.8\rm\ m/s[/tex]
Thus, the recoil of the rifle is -1.8 m/s, the negative sign denotes that the velocity of recoil was in opposite direction to the bullet.
Hence, the recoil velocity of the rifle weighing 5 kg is 1.8 m/s.
Learn more about Momentum:
https://brainly.com/question/4956182
Name 10 transition metals
Answer:
Scandium (Sc), Titanium (Ti), Vanadium (V), Chromium (Cr), Manganese (Mn), Iron (Fe), Cobalt (Co), Nickel (Ni), Copper (Cu)
Explanation:
the transition element or transition metal occupy the short columns in center of the periodic table, between Group 2A and Group 3A
The mass of a piece of metal is 1200g A measuring cylinder contains 150cm3 of water. The piece of metal is
put into the measuring cylinder. The water level rises to 250cm3 and covers the metal,
What is the density of the metal?
Answer:
The density of the metal is [tex]12\ gr/cm^3[/tex]
Explanation:
Density
The density of a substance is the mass per unit volume. The density varies with temperature and pressure.
The formula to calculate the density of a substance of mass (m) and volume (V) is:
[tex]\displaystyle \rho=\frac{m}{V}[/tex]
The piece of metal has a mass of m=1200 gr. When the piece of metal is submerged in a measuring cylinder, the water level rises from 150 cm3 to 250 cm3. This means the piece of metal occupies a volume of V=250 cm3-150 cm3=100 cm3.
The density is:
[tex]\displaystyle \rho=\frac{1200}{100}[/tex]
[tex]\rho=12\ gr/cm^3[/tex]
The density of the metal is [tex]\mathbf{12\ gr/cm^3}[/tex]
If constants aren't given in an experiment, what can be constant in the experiment?
Answer:
Anything in an experiment that remains unchanged.
Explanation:
An example could be the temperature of the laboratory room. If there is something that has an effect on an experiment that is not variable, it is a constant. Another constant could be, say, if you were doing calculations with the same amount and kind of fluid throughout the experiment, then that fluid would also be a constant.
Find the weight of a 4.2 kg backpack,
A) 41.16 N
B) 0.42 kg
C) 41.16 kg
D) 0.42 N
Answer:
Although the weight is given and we are asked for the weight, the odd wording of the question implies that we are being asked for the gravitational force on the backpack.
If it is gravitational force that is being requested, then the correct answer is A) 41.16 Newtons.
If it is actual weight being asked for, then none of the answers are correct, as the weight of 4.2 kg is given in the question, and does not match any of the answers.
6. Why does sound travel faster through a steel bar than through a swimming pool filled with water?
Water is a denser medium than steel.
Water has a larger wavelength than steel.
Steel has a larger wavelength than water.
Steel is a denser medium than water.
A driver brings a car to a full stop in 2.0 s. If the car was
initially travelingat 22 m/s, what is the acceleration?
which eletromagnetic waves have the lowest frequency radio waves micro waves x rays or gamma rays
Answer: Radio waves have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
Explanation:
HELP AGAIN PLS
PHYSICS - I SUCK AT THIS
Answer:
You can calculate average velocity by taking the delta(x) which is the change in distance and then dividing it by the time.Hence here the tumbleweed goes from 25.6m to -14.4m. ~25.5m-(-14.4) = 39.9 m traveled 39.9m/7s= 5.7 m/sIf the magnitude of a vector is√8 .If it's x-component is 2 ,then it's y- component is
Answer:
The answer is below
Explanation:
A vector quantity is a quantity that has both magnitude and direction. The magnitude of a vector is the length of that vector.
The magnitude of a vector a with a x component of x and y component of y is given by the formula:
[tex]|a|=\sqrt{x^2+y^2}[/tex]
Given that the vector has a magnitude of √8, the x component is 2 and the y component = y. Hence:
[tex]\sqrt{8}=\sqrt{2^2+y^2}\\\\squaring\ both\ sides:\\\\8=4 + y^2\\\\y^2=8-4\\\\y^2=4\\\\square\ root\ of\ both\ sides:\\\\y=\sqrt{4} \\\\y=\pm 2\\\\y=+2\ or\ y=-2[/tex]
what do you notice about gravity in space?
Answer:
gravity is everywhere in space and objects in space are always falling: towards the earth, towards the sun, and towards the galactic center
Explanation:
3) A 100kg man runs up a staircase
3 cm high in 5 seconds. How much
pouwer does he develop?
Answer:
Power = 5.88 Watt
Explanation:
Mechanical Work and Power
Mechanical work is the amount of energy transferred by a force. Its SI unit is the joule.
Being the force vector and the displacement vector, the work is calculated as:
[tex]W=\vec F\cdot \vec s[/tex]
If both the force and displacement are parallel, then we can use the equivalent scalar formula:
[tex]W=F.s[/tex]
Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.
The power can be calculated as:
[tex]\displaystyle P=\frac {W}{t}[/tex]
Where W is the work and t is the time.
The m=100 Kg man goes up a distance of s=3 cm = 0.03 m in t=5 seconds. To calculate the work done against gravity the weight is considered as the force:
F = m.g = 100*9.8
F = 980 N
The work is:
W = 980*0.03
W = 29.4 J
Finally, the power is:
[tex]\displaystyle P=\frac {W}{t}[/tex]
[tex]\displaystyle P=\frac {29.4}{5}[/tex]
P = 5.88 Watt