Answer:
105 g.m/s
Explanation:
The law of conservation of momemtum states that initial momemtum is equal to final momentum.
initial momentum of orange ball = 165 g.m/s
initial momentum of green ball = 0 g.m/s
final momentum of orange ball = 60 g.m/s
final momentum of green ball = x
165+0=60+x
⇒x = 165-60= 105 g.m/s
the momentum of the green ball right after the collision =105 g.m/s
What causes wind to follow patterns
Answer: Wind follows a pattern because the Earth is spinning in one motion. If we were spinning in one way then another we would have one day go by then the spinning cycle would change and we would have to go through that day all over again, it would not be logical because then we would be in the same season as well, we would be in one season for the rest of our lives until we died.
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1. Identify the phase or phases of matter (solids, liquids, and gases) that
apply to each statement. More than one phase of matter may apply to each
statement.
a. Molecules do not move around, but vibrate in place
b. Has volume but no particular shape
c. Flows
d. Molecules break free of intermolecular forces
e. Does not have a volume or shape
f. Molecules can move around and switch places, but remain close
together
Answer:
a: solid
b: liquid
c: liquid
d: gas
e: gas
f: liquid
Explanation:
According to the forces of attraction, the states of matter in each case serially are as follows: solid, liquid,liquid,gas,gas and liquid respectively.
What is matter?Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of same type.
Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.
The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.Matter can neither be created nor destroyed rather is conserved at end of chemical change.
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a ball has the speed of 4.0 m/s and a kinetic energy of 16 joules. what is the mass of the ball?
Explanation:
[tex]ke = \frac{1}{2} m {v}^{2} \\ m = \frac{2ke}{ {v}^{2} } \\ = \frac{2 \times 16}{ {4}^{2} } = 2kg[/tex]
please help, brainest if correct
Answer: B
Its b increased risk of disease
A sprinter runs at a forward velocity of 8.94 m/s. If the sprinter has a mass of 62.4 kg, what is the sprinter's kinetic energy?
1. 2500 J
2. 249 J
3. 249.3 J
4. 2490 J
Plzzz help me!!!
Answer: 2490 J
Explanation:
The formula to calculate kinetic energy is 1/2mv² where,
m = mass = 62.4
v = velocity = 8.94
Kinetic energy = 1/2mv²
= 1/2 × 62.4 × 8.94²
= 1/2 × 62.4 × 79.9236
= 2493.6J
The closest answer is option D.
pls someone help me
Answer:
Can't see the pic
Explanation:
Water has physical properties that can be
measured and
A force has both______ and _______. Question 3 options: Magnitude & Direction Direction & Motion Speed & Impact Speed and Direction
Answer:
A force has both Direction and Motion.
Explanation:
For example, when finding acceleration you take the time and divided it by distance. If the thing you are measuring is going in the positive direction, the acceleration will be positive and if it is going in the negative direction the acceleration will be negative.
Magnitude and Direction
Explanation:
Force is a Vector Quantity
As learned in an earlier unit, a vector quantity is a quantity that has both magnitude and direction. To fully describe the force acting upon an object, you must describe both the magnitude (size or numerical value) and the direction.
Can someone help me please
When a wire with a current is placed in a magnetic field, electrical energy is transformed into mechanical energy
Please select the best answer from the choices provided
T
F
Answer:
TRUE
Explanation:
When a wire with a current is placed in a magnetic field, electrical energy is transformed into mechanical energy. The transformation happens when the magnetic field produced by the current causes the wire to move.
a motorcycle traveling on the highway at a velocity of 120 kilometre-per-hour passes a car traveling at a velocity of 90 kilometre-per-hour from the point of view of a passenger on the car what is the velocity of a motorcycle
Answer:
The relative velocity of the motorcycle to a passenger in the car is 30 km/h
Explanation:
The question relates to the principle of relative velocity and reference frames
The given parameters are;
The velocity of the motorcycle, v₁ = 120 km/h
The velocity of the car, v₂ = 90 km/h
The relative velocity of an object X with regards to another object Y is the velocity the object X will seem to be moving with to an observer in the rest frame of object Y written as [tex]\underset{v}{\rightarrow}_{X|Y}[/tex] = [tex]\underset{v}{\rightarrow}_{X}[/tex] - [tex]\underset{v}{\rightarrow}_{Y}[/tex]
Therefore, the relative velocity of the motorcycle to the car is [tex]v_{1|2}[/tex] = v₁ - v₂, which give;
[tex]v_{1|2}[/tex] = 120 km/h - 90 km/h = 30 km/h
The relative velocity of the motorcycle to a passenger in the car = 30 km/h.
Does anyone know the answer
Water is stored in a reservoir at an average vertical height of 350 m above the turbines of a hydroelectric power station. During a 7.0 hour period, 1.8 × 10^6 m3 of water flows down from the reservoir to the turbines. (a) The density of water is 1000 kg / m3. For this 7.0 hour period, calculate (i) the mass of water that flows from the reservoir to the turbines, find the mass
the gravitational potential energy transformed as the water flows to the turbines, find the energy
the maximum possible average output power.
find the power
Answer:
(a) (i) 1) The mass of the water is 1.8 × 10⁹ kg
2) The gravitational potential energy is 6.174 × 10¹² J
4) The energy given to the turbine by the falling water is 6.174 × 10¹² J
5) The maximum possible average output power is 245 MW
Explanation:
In the question we are required to convert the total initial potential energy, P.E., of the water to power
The given parameters are;
The height of the reservoir above the turbine, h = 350 m
The time duration the volume of water takes to flow, t= 7.0 hours
The volume of water that flows down from the reservoir, V = 1.8 × 10⁶ m³
The density of the water, ρ = 1000 kg/m³
(a) (i) Density = Mass/Volume
∴ Mass = Density × Volume
The mass of the water that flows down from the reservoir = m = V × ρ
By substituting the known values, we have
The mass of the water, m = 1.8 × 10⁶ m³ × 1000 kg/m³ = 1.8 × 10⁹ kg
2) The gravitational potential energy, P.E. = m × g × h
where;
m = The mass of the water = 1.8 × 10⁹ kg
g = The acceleration due to gravity = 9.8 m/s²
h = The height from which the water falls = 350 m
Which gives;
The gravitational potential energy,
P.E. = 1.8 × 10⁹ kg × 9.8 m/s² × 350 m = 6.174 × 10¹² J
The gravitational potential energy = 6.174 × 10¹² J
4) The energy given to the turbine by the falling water, E = The gravitational potential energy = 6.174 × 10¹² J
5) The maximum possible average output power, P = (Energy given to the turbine, E)/(Time taken to produce the energy = The time duration the water takes to flow, t)
The time duration the water takes to flow, t = 7.0 hours = 7 × 60 × 60 seconds = 25,200 seconds
∴ P = 6.174 × 10¹² J/(25,200 s) = 245,000,000 watts = 245 MW
A motorcycle skids to a stop on a road.
What is the equal and opposite force for the force of the motorcycle's friction pushing on the road as
described by Newton's third law?
Choose 1 answer:
Normal force of the road pushing up on the motorcycle
B
Earth's force of gravity pulling down on the motorcycle
Friction of the road on the motorcycle in the opposite direction
D
Motorcycle's force of gravity pulling up on the Earth
Answer:
Friction of the road on the motorcycle in the opposite direction
Explanation:
khan academy
Hooke's Law Question - Will mark brainliest
A spring of natural length 10cm and spring constant 4.00Ncm −1 has a load of 22.0N placed on it. What is its new length?
Explanation:
Hooke's Law: Fe = kx
x = Fe / k = (22.0N) / (4.00N/cm) = 5.50cm.
10.00cm + 5.50cm = 15.50cm
The new length of the spring is 15.50cm.
An 82 kg man, at rest, drops from a diving board 3.0 m above the surface of the water and comes to rest 0.55 s after reaching the water. What force does the water exert on him?
Answer:
1626.4 N
Explanation:
Given that a 82 kg man, at rest, drops from a diving board 3.0 m above the surface of the water and comes to rest 0.55 s after reaching the water. What force does the water exert on him?
The parameters to be considered are:
Distance S = 3m
Time t = 0.55s
Since the man started from rest, initial velocity u = 0
Using second equation of motion
S = Ut + 1/2at^2
3 = 1/2 × a × 0.55^2
3 = 1/2 × a × 0.3025
a = 3/ 0.15125
a = 19.83 m/s^2
Force = mass × acceleration
Force = 82 × 19.83
Force = 1626.4 N
Therefore, the force that water exerted on him is 1626.4 N
The electric field between two parallel plates has a magnitude of 180 N/C. The two plates are 2.5 cm apart. Recall that the magnitude of the charge on an electron is 1.602 × 10-19 C.
How much work is done to move an electron from the positive plate to the negative plate?
4.0 × 10-21 J
7.2 × 10-19 J
4.5 J
7200 J
Answer:
b
Explanation:
The amount of work done to move an electron from the positive plate to the negative plate is : 7.2 * [tex]10^{-19}[/tex] J
Step 1: Given data
magnitude of two parallel plate ( E ) = 180 N/C
Distance between plates ( d ) = 2.5 cm
magnitude of charge on electron ( e ) = [tex]1.602 * 10^{-19}[/tex] C
Step 2 : determine the work done
Work done = qV = еEd
= [tex]1.602 * 10^{-19}[/tex] * 180 * 2.5
= 720 * [tex]10^{-22}[/tex] J ≈ 7.2 * [tex]10^{-19}[/tex] J
Hence the amount of work done to move an electron from the positive plate to the negative plate = 7.2 * [tex]10^{-19}[/tex] J
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is cereal a soup? explain why or why not
Answer:
no
Explanation:
because its cold
soup is hot
a set of related measures or activities with a particular long term aim
Answer:
program explanation
Explanation:
program explanation
The set of activities having a long-term aim should be a program.
What is the program?A program refers to a set of instructions that a computer follows in order to perform a specific task. At the time When you program a computer, you provide it a set of instructions to make it able to perform a particular task.
So here the program should be considered.
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a skydiver has a mass of 50.5 kg what is the force of weight on the sky diver?
F= _N
Answer:
The answer is 494.9 N
Explanation:
I got this same question, and it worked for me! Hope this helps <3
HELPPP!! WHAT TWO THINGS WOULD HAVE THE SAME POTENTIAL ENERGY?? PLS HELP
Answer:
The amount of gravitational potential energy an object has depends on its height and mass. The heavier the object and the higher it is above the ground, the more gravitational potential energy it holds. Gravitational potential energy increases as weight and height increases.
Answer:
A rock and a drilled nail
Explanation:
Both objects are not moving potential energy means no movement no energy and both objects never move
If an atom has 16 protons, 14 neutrons, and 19 electrons, what is the atom's electrical charge?
A +2
B.-3
C.-2
D.-5
Answer:
Thus, each atom or ion must contain 16 protons. We are told that the ion also has 14 neutrons, meaning the mass number of the ion is 16 + 14 = 30 Because the ion has 16 protons and 19 electrons, its net charge is -3.
Emilio pushes a 100 kg freshman with 200 N of force. How much is the freshman accelerated?
Explanation:
F = MA
200 = 100 * A
A = 200/100
A = 2m/sec^2
hope it helps youQuestion 3 of 10
Which law is stated below?
The acceleration of an object is proportional to the force applied to it and
inversely proportional to its mass.
A. The law of inertia
B. Newton's first law
C. Newton's third law
D. Newton's second law
Answer:
D. Newton's second law
Explanation:
Newton's second law of motion states that force of an object is a product of its mass and its acceleration.
Mathematically, F= ma where m is mass and a is acceleration
So from the statement above : The acceleration of an object is proportional to the force applied to it and inversely proportional to its mass , it can be seen from the formula variation as;
F= ma -----making a the subject of the formula
a= F/ m
a= 1/m * F --------- a is inversely related to m as you can see from 1/m but directly related to F hence;
Increase in mass with the same force applied causes the body to accelerate slower where as when force increases, the body accelerates faster.
answer if you want to
Answer:
C
Explanation:
think of a diffuser
Fill the blank.
Energy is ____ changing from one form to another in the world.
Answer:
Matter
Explanation:
what material would you use to build countertops
Answer: Natural stone
Explanation:
Answer:
Natural stone
Explanation:
The most common natural stones used to make countertops include granite, marble, soapstone, and slate.
SI. unit of resistance ?
Answer:
si unit of resistance is Ohm
A train leaves the station heading south on the tracks. It takes the train 5 seconds to reach 50 miles per hour. It completes the entire 100-mile trip in two hours. Calculate the train's average speed and velocity over the two-hour trip. Show your work. Identify if each of the measurements are a scalar or vector quantity
why do prescribed drugs need to be prescribed by doctors what can happen if you abuse these drugs without a pressure?
Answer:
unperscriebed drugs can e harmful to your body
Explanation: