Answer: 3.52m/s
Explanation:
Kinetic energy is calculated as:
= 1/2mv²
where,
m = mass
v = velocity
Therefore,
775 = 1/2 × 125 × v²
775 = 62.5v²
v² = 775/62.5
v² = 12.4
v = ✓12.4
v = 3.52m/s
The electric force is a universal force that exists between any two charged objects What type of electric force exists between a
positively charged proton and a negatively charged electron?
A
an attractive force
B.
a repulsive force
C.
an attractive and a repulsive force
D
neither an attractive nor a repulsive force
If a charge at 60c flow in a conductor for 30 second then the current that flow in a conductor is
Answer:
Given - Charge = 60c
time = 30 sec
To find - current
Solution
Current = Charge/time
I = V/T
I = 60/30
I = 2 ampere
More to know -
I = Current
V = Charge
T = Time
A cheetah can run at instantaneous speeds of 64 km/hr or 17.8 m/sec. How much time does it take a cheetah to run 2 m? 0.1 seconds, 0.1 m/s, or 35.6 seconds
Answer:
0.1 seconds
Explanation:
The speed of the cheetah has been given as 64km/h
To convert it to m/sec = 64x10³/3600
This is what resulted into 17.8m/sec
We are required to calculate how much time this cheetah would take to run for 2meters.
To get this,
= 2/17.8
= 0.11235 seconds
This is approximately 0.1seconds. so 0.1sevonds is the time it would take it to run 2m
Compared with those who live in the lowlands, people who live in the Southeast highlands experience
Answer:
The territory of Scotland was divided into two parts -- the highlands and the lowlands.
Explanation:
The people living in places of high altitudes are called highlanders. These high altitude places are called high lands and places with low elevations or altitudes are called the low lands. There are many differences between the two places and people experiences different difficulties in these places.
Some of the differences are :
The life of the people living in high lands are much more tougher than those living in the low lands. The highlanders have to work more hard than lowlanders.
The agricultural activities are more flourished in the low lands than in the high lands.
The low lands are more populated and highly industrialized than the high lands. Iron and steel industry, metal working industry and agriculture are some of the main industries of lowlands. They are the land of the Scottish nation.
The two angled ropes are used to support the crate in Figure P5.7. The tension in the ropes can have any value up to 1500 N. When the tension exceeds this value, the ropes will break. What is the largest mass the ropes can support?
Answer:
170 kg
Explanation:
Free-Body Diagram:Let's start by drawing a free body diagram for this problem. Let's call the tension in the left rope [tex]T_1[/tex] and the tension in the right rope [tex]T_2[/tex].
Now we can construct a free body diagram using the horizontal and vertical components of the two tension forces.
Let's start with the left tension force:
Horizontal component (x): [tex]T_1 \cdot cos(30)[/tex]Vertical component (y): [tex]T_1 \cdot sin(30)[/tex]The right tension force:
Horizontal component: [tex]T_2 \cdot cos(45)[/tex]Vertical component: [tex]T_1 \cdot sin(45)[/tex]In order to see what these forces look like on the diagram, look at the first image attached. (1)
Now, we can create the FBD using the components of the tension forces and the force of gravity pulling on the crate, known as w.
The horizontal components of [tex]T_1[/tex] and [tex]T_2[/tex] go on the left and right of the FBD, respectively. The two vertical components go on top, and the weight force is on the bottom. We know that weight = mg.
To see what the free body diagram should look like, see the second image attached. (2)
Now that we have the FBD, we can write a system of equations using the sum of forces in both the x- and y-direction.
Since the crate is not moving in either the horizontal or vertical direction, we can say that the net force acting on the crate is 0.
[tex]F_\text{net} = 0[/tex]This means that the sum of x forces and the sum of y forces are both 0. Let's set the top and right to be the positive direction and the bottom and left to be the negative direction. Now we can write the system of equations:
[tex]\sum F_x = T_2 \cdot cos(45) - T_1\cdot cos(30) = 0[/tex] [tex]\sum F_y = T_1 \cdot sin(30) +T_2\cdot sin(45) - mg = 0[/tex]There are many ways to solve this system of equations, but I will be showing the top two ways that I tend to solve these types of problems.
Method 1:Solve for [tex]T_1 \cdot sin(30)[/tex] and [tex]T_1 \cdot cos(30)[/tex] in both equations.
[tex]T_1 \cdot cos(30) = T_2 \cdot cos(45)[/tex] [tex]T_1\cdot sin(30) = mg - T_2 \cdot sin(45)[/tex]We know that [tex]\frac{sin\theta}{cos\theta}[/tex] = [tex]tan\theta[/tex], so we can reorder both equations and divide them.
[tex]T_1\cdot sin(30) = mg - T_2 \cdot sin(45)[/tex] [tex]T_1 \cdot cos(30) = T_2 \cdot cos(45)[/tex] [tex]tan(30)=\frac{mg-T_2\cdot sin(45)}{T_2\cdot cos(45)}[/tex]Note that [tex]\frac{T_1}{T_1}[/tex] cancels, leaving us with tan(30).
Now that we have this equation, we can plug in known values. We are trying to solve for m, the largest mass of the crate that the ropes can support. We know that:
[tex]g=9.8\ \frac{m}{s^2}[/tex] [tex]T_2=1500\ \text{N}[/tex]Let's substitute these values into our equation:
[tex]tan(30)=\frac{m(9.8)-(1500)\cdot sin(45)}{(1500)\cdot cos(45)}[/tex]Multiply 1500 * cos(45) to both sides of the equation.
[tex]tan(30) \cdot (1500 \cdot cos(45)) =9.8m-(1500 \cdot sin(45))[/tex]Add 1500 * sin(45) to both sides of the equation.
[tex]tan(30) \cdot (1500 \cdot cos(45)) + 1500 \cdot sin(45)) =9.8m[/tex]Divide both sides of the equation by 9.8.
[tex]\frac{tan(30) \cdot (1500 \cdot cos(45)) + (1500 \cdot sin(45)) }{9.8}= m[/tex]Simplify.
[tex]\frac{1673.032607}{9.8}=m[/tex] [tex]m=170.717613[/tex]The largest mass the ropes can support is around 170 kg (round down, not up).
Method 2:We can use the system of equations again.
[tex]T_1 \cdot cos(30) = T_2 \cdot cos(45)[/tex] [tex]T_1\cdot sin(30) = mg - T_2 \cdot sin(45)[/tex]This time, let's do a little guess and check. Using the first equation, plug in 1500 N for T2 and solve for T1.
[tex]T_1 \cdot cos(30) = (1500) \cdot cos(45)[/tex]Divide both sides of the equation by cos(30).
[tex]T_1=\frac{1500 \cdot cos(45)}{cos(30)}[/tex]Simplify.
[tex]T_1=1224.744871 \ \text{N}[/tex]Now plug in 1500 N for T1 and solve for T2.
[tex](1500) \cdot cos(30) = T_2 \cdot cos(45)[/tex]Divide both sides by cos(45).
[tex]T_2=\frac{1500\cdot cos(30)}{cos(45)}[/tex] [tex]T_2=1837.117307 \ \text{N}[/tex]Since the tension cannot exceed 1500 N without the rope breaking, we must use the first substitution, where [tex]T_1=1224.744871[/tex] and [tex]T_2=1500 \ \text{N}[/tex].
Now we can use these known values and plug them into the second equation: [tex]T_1\cdot sin(30) = mg - T_2 \cdot sin(45)[/tex]
Add [tex]T_2 \cdot sin(45)[/tex] to both sides of the equation.
[tex]mg=T_1 \cdot sin(30) + T_2 \cdot sin(45)[/tex]Divide both sides of the equation by g.
[tex]m=\frac{T_1 \cdot sin(30) + T_2 \cdot sin(45)}{g}[/tex]Plug in known values and solve for m.
[tex]m=\frac{(1224.744871) \cdot sin(30) + (1500) \cdot sin(45)}{9.8}[/tex]Simplify.
[tex]m=\frac{1673.032607}{9.8}[/tex] [tex]m=170.717613[/tex]As you can see, we get the same answer with either method. The largest mass the ropes can support is 170 kg.
Which describes one way that renewable resources differ from nonrenewable resources?
Renewable resources make cleaner energy
It takes longer to replenish renewable resources,
Renewable resources are more easily located and harvested.
It often costs much less to produce energy from renewable resources,
Answer:
renewable energy is cleaner
Explanation:
Renewable energy is cleaner differs from non renewable resources.
What is renewable resources ?"A renewable resource, also known as a flow resource, is a natural resource which will replenish to replace the portion depleted by usage and consumption, either through natural reproduction or other recurring processes in a finite amount of time in a human time scale."
What is non renewable resources?"A non-renewable resource is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption. An example is carbon-based fossil fuels. The original organic matter, with the aid of heat and pressure, becomes a fuel such as oil or gas"
Know more about renewable resources here
https://brainly.com/question/19604560
#SPJ2
Which of the following is an example of a double replacement reaction?
A. 3Fe + 2O2 → Fe3O4
B. BaCl2 + K2CO3 → BaCO3 + 2KCl
C. NiCO3 → NiO + CO2
D. Cl2 + 2NaBr → 2NaCl + Br2
Answer:B
Explanation:please like this bc I just did it and got it right
Scuba divers use compressed oxygen gas to go diving. The oxygen's volume decreases as pressure is increased to fit more in an oxygen tank. What Gas Law is being applied in this situation?
Charles Law
Gay-Luassac's Law
Boyle's Law
Newton's Law
Question 9 of 20
Which sentence best describes the function of an electric motor?
A. An electric motor uses electrical energy to produce magnetic
force.
B. An electric motor uses electrical energy to produce mechanical
energy
C. An electric motor uses mechanical energy to produce electrical
energy
D. An electric motor uses magnetic force to produce electrical
energy
Option B. An electric motor uses electrical energy to produce mechanical energy.
An electric motor is used to transform electric electricity into mechanical power. An electric-powered motor is an electrical device that converts electric energy into mechanical electricity.
Maximum electric-powered motors operate thru the interaction among the motor's magnetic field and electric-powered contemporary in a wire winding to generate force inside the form of torque implemented on the motor's shaft.
Electric motors are devices that convert electrical strength into mechanical power, commonly in the form of rotational motion. In easy terms, they may be devices that use electric powered power to generate reason strength.
Learn more about electric motors here:-https://brainly.com/question/18619348
#SPJ1
4. An isotope has 46 electrons, 60 neutrons, and 46 protons. Name the isotope.
If a net vertical force of 14.7 N is applied to a ball of mass 1.5 kg what acceleration
is produced?*
Answer:
9.8m/s^2
Explanation:
F=ma
F=14.7N
m=1.5kg
a=F/m
a=14.7N/1.5kg
a=9.8m/s^2
An owl weighing 40N is sitting in a tree waiting to dive down to catch a mouse. If the owl's potential energy is 800 J with respect to the ground below, at what height above the ground is the owl?
h=PE/m
A. 81.63 m
B. 20 m
C. 2.04 m
Answer:
h = 20 m
Explanation:
Gravitational Potential Energy
Gravitational potential energy (GPE) is the energy stored in an object due to its vertical position or height in a gravitational field.
It can be calculated with the equation:
U=m.g.h
Where m is the mass of the object, h is the height with respect to a fixed reference, and g is the acceleration of gravity or [tex]9.8 m/s^2[/tex].
The weight of an object of mass m is:
W = m.g
Thus, the GPE is:
U=W.h
Solving for h:
[tex]\displaystyle h=\frac{U}{W}[/tex]
The weight of the owl is W=40 N and its GPE is U=800 J.
[tex]\displaystyle h=\frac{800}{40}=20[/tex]
h = 20 m
Mass of 80kg , velocity of 3 m/s , what is the momentum
Answer:
m times v =p
so 240 kg m/s that's the answer
Based on the law of conservation of energy, which statement is correct?
Answer:
D. Energy in an isolated system remains constant
General Formulas and Concepts:
Physics
Law of Conservation of Energy - Energy is neither created or destroyedExplanation:
According to the Law of Conservation of Energy, it cannot be created or destroyed.
Therefore, we can eliminate choices A and B right off the bat.
We need to choose between C and D. We know that even though energy cannot be created or destroyed, it can be changed into a different form. Therefore, the correct answer is D.
please tell fast plzzzzzzz
Answer:
quartz watch wasn't in ancient times
According to the law of conservation of mass, what is the mass of aluminum
oxide (Al2O3) formed in this reaction?
-
2A1 +
53.96 g
302
96.00 g
2A1203
?
A. 84.08 grams
B. 117.96 grams
C. 203.92 grams
D. 101.96 grams
D. 101.96 grams. Molar mass of Al2O3=2× Atomic mass of aluminium + 3× atomic mass of oxygen. =2×27+3×16=54+48=102g.
What happens when Al2O3 reacts?Sodium aluminate and water are produced when aluminum oxide Al 2 O 3 interacts with sodium hydroxide solution.Between 900 and 1100 ° C is the temperature at which this reaction occurs.Aluminum oxide functions as just an acid in this reaction.
How is Al2O3 produced from aluminum?Bauxite is the name of the aluminum ore (Al 2O 3).Bauxite is refined to create aluminum oxide, commonly known as alumina, which can be used to extract aluminum.Electrolysis is used to remove the metal, but first the aluminum oxide must be heated in order for electricity to flow through it.
To know more about Molar mass visit:
https://brainly.com/question/17920577
#SPJ1
Answer: The CORRECT Answer is : 203.92 grams
Explanation: I took the test
4. Why do you think people in south Louisiana specialize in seafood?
Answer:
gang
Explanation:
yupppp
Four different objects are placed on a number line at 0. The chart describes the motion of each object.
Object
Motion
W
3 units left, then 3 units right
Х
6 units right, then 18 units right
Y
8 units left, then 24 units right
Z
16 units right, then 8 units left
Using the information in the chart, the distance and displacement of each object can be determined. Which object has
a distance that is three times as great as its displacement?
W
Х
Z
Answer:
Z
Explanation:
Answer:
Z
Explanation:
I took the test on edge and got it right. Good luck :)
An echocardiogram is a type of ultrasound test that measures sound waves as they bounce off the different parts of a person's heart. Which of these is the best model for how this test works? A. Counting the seconds between yelling and hearing an echo in a cave B. Counting the seconds between seeing lightning and hearing thunder C. Counting the minutes it takes a pot of water to come to a boil D. Counting the minutes it takes a ship's anchor to reach the seafloor
Answer:
A
Explanation:
did the test
how does the vertical component of a projectiles compare to the motion of vertical free fall when air resistance is neglected?
Anna got fed up and decided to put some of her classmates in a big box. She shoved Riley, Justin,
and Paul into the box and taped it shut. Anna couldn’t overcome the force of friction by herself, so she
asked some classmates to help push the box out the door. The force of friction of the floor on the box
was 450 N. If Anna and her classmates can each shove with a force of 34 N, how many students would it
take to make the box start moving out the door?
Answer:
like 14 students?
Explanation:
14x34= 476 and the force from them would have to go over 450N to overcome the force of friction and get the box moving
The Milky Way is our home galaxy. Which of the following are the main components of a galaxy?
A.
gravity, sedimentary rocks, and water
B.
ice, meteoroids, and minerals
C.
orbits, cores, and eclipses
D.
gas, dust, and stars
Answer:
D
Explanation:
most probable answers. I miss however here few things like eg. dark matter
A heat engine operating between the
temperatures T1 and T2 takes in Qı calories at
temperature T1 and gives up Q2 calories at
temperature T2. The efficiency of this heat
engine is
(Q1 - Q2)/Q2.
(Q1 - Q2)/Q1.
(T2 - T1/T2.
Q2/(Q1 - Q2).
O T1/(T1-T2).
Answer:
(Q1 - Q2)/Q1
Explanation:
The efficiency of any device can be given by the following formula:
[tex]Efficiency = \eta[/tex] = Output/Input
Now, for engine the output is the mechanical work that it does and the input is the heat that it absorbs. Let:
W = Work Done by the engine
Q₁ = Heat Absorbed by the System
Q₂ = Heat Rejected by the System (Because According to 2nd Law of Thermodynamics, engine can not convert the entire heat into work without rejection of some heat)
Therefore, the equation becomes:
[tex]\eta = \frac{W}{Q_{1}}[/tex]
but, the work can be written as the difference between the absorbed heat and the rejected heat. Hence,
[tex]\eta = \frac{Q_{1} - Q_{2}}{Q_{1}}[/tex]
Therefore, the correct option is:
(Q1 - Q2)/Q1
a boy claps his hand when he is 420m from the bottom of the cliff. he heard the eco after 2.4 second. what is the speed of sound
Answer:
350 m/s
Explanation:
In order for Boy to hear the sound, the sound has to travel from his hands to the cliff, and then BACK to him from the cliff to his ears.
So the sound has to travel (2 x 420m) = 840 m.
Speed = (distance) / (time)
Speed = (840 m) / (2.4 sec)
Speed = 350 m/s
Answer:
350 m/s
Explanation:
What compound is a product of photosynthesis?
Group of answer choices
Water
Carbon Dioxide
Glucose
Sunlight
Answer: Glucose
Explanation:
14. It takes an airplane nearly ¾ of a mile to stop. Which law of motion is being used?
A) Newton's 1st Law
B) Newton's 2nd Law
C) Newton's 3rd Law
Which vector is the sum of vectors a and ?
b
а
O
A.
B.
C.
Answer:
i would say D.
Explanation:
The sum of the given vector is option B as it is showing proper magnitude and direction.
What is a vector?A Euclidean vector, also known as a geometric vector or spatial vector, is a geometric entity with magnitude (or length) as well as direction in arithmetic, physics, and engineering.
Vector algebra allows vectors to be added to other vectors.
Physical concentrations can be represented using vectors. Vectors are most frequently used in physics to represent displacement, velocity, and acceleration.
Vectors are arrows that represent an amalgamation of magnitude and direction.
The operation of combining two or more vectors into a vector sum is known as vector addition.
The rule for vector addition of two or more vectors is given by the so-called parallelogram law.
Thus, the correct option is B as it is having magnitude and direction.
For more details regarding vector, visit:
https://brainly.com/question/13322477
#SPJ2
A 1.0-kg object moving in a certain direction has a kinetic energy of 2.0 J. It hits a wall and comes back with half its original speed. What is the kinetic energy of this object at this point?
Lets calculate the initial speed of the block. We know that kinetic energy is given by:
[tex]K_0 =\dfrac{mv_0^2}{2}[/tex]
Solving for v₀:
[tex]v_0 = \sqrt{ \dfrac{2K_0}{m}} = \sqrt{ \dfrac{2(2\;J)}{1\;kg}} = 2\;m/s[/tex]
If the speed after it hits a wall is half its original speed then:
v = v₀/2 = 2 m/s / 2 = 1 m/s
Then the kinetic energy at this point is:
[tex]K =\dfrac{mv^2}{2} = \dfrac{(1\;kg)(1\;m/s)^2}{2} = \dfrac{1}{2}\;J = 0.5\;J[/tex]
The inetic energy of this object at this point is 0.5 J.
lily can travel 60 miles in 1.5 hours. if her speed is reduced by 5 mph. how far can she travel in 3 hours?
Answer:
3 hours.
Explanation:
If speed is reduce of 5, then she drive at 35 mph.
so 35*3 = 105 miles in 3 hours.
Therefore, we get 3 hours.
ANSEWR FOR BRAINLIEST
When lifting weights, technique and posture are less importance the than amount of weight you lift?
A. true
B. false
Answer:
B. False
Explanation:
Without good technique and posture you can end up getting injured.