Explanation:
120+ 120 = 240 miles divided 1 hours 20 seconds
A lightbulb is rated to how a power output of 80 w, if the lightbulb is running for 600 seconds, how much energy (work) is it using?
Answer:
Light bulbs are rated in watts to indicate how much energy they consume. Does the wattage of a light bulb have anything to do with brightness? ... In general, that works well with traditional incandescent light bulbs. ... It's also worth noting that kW can be synonymous with “demand” if you're talking to a utility ...
Explanation:
Light bulbs are rated in watts to indicate how much energy they consume. Does the wattage of a light bulb have anything to do with brightness? ... In general, that works well with traditional incandescent light bulbs. ... It's also worth noting that kW can be synonymous with “demand” if you're talking to a utility ...
If you have a mass of 15kg , what is your weight on earth?
what is meant by the fact that length of a object is 4 metre
Answer:
It simply means that the longest side of the object is 4 m that is 400cm..
Explanation:
___________
what is the mechanical advantage of a pulley system
Answer:
Pulleys accomplish 2 separate operations throughout the computer controlled additional benefit technologies listed elsewhere here.
Explanation:
If indeed the pulley would be connected to that same attachment point, these are named a corrected pendulum or perhaps a change in direction. Its job should be to reverse the trajectory of that same rope pull. Unless the pulley would be connected to that same load, this same pulley seems to be a detachable as well as a mechanical additional benefit.Which space rock is easiest to study and what do we typically learn from
them?
Compare these two waves!!!! RIGHT NOW I DONT HAVE ALOT OF TIME
Answer:
wave D has higher frequency then wave c
wave C has longer wavelength
wave D has a higher pitch
Explanation:
Answer: Isn't frequency the amount of times something happened? So I'd say A also E
Explanation:
(Don't rely I'm not that smart)
Please Help Me!!!........
Answer:
B: A material with relatively weak bonds between it's particle can be shped in to a thin sheet.
Explanation:
A soap bubble is 77.1 nm thick and illuminated by white light incident perpendicular to its surface. What wavelength (in nm) and color of visible light is most constructively reflected, assuming the same index of refraction as water (nw
Answer:
0.41 μm or 410 nm
Explanation:
Given that
Soap thickness, t = 77.1 nm = 77.1*10^-9 m
Refractive index of water, μ = 1.33
The longest wavelength for constructive wavelength is given by the formula
2μt = (n - 1/2)λ
Making λ the subject of the formula gives
λ = 2μt / (n - 1/2), substituting the values, we have
λ = (2 * 1.33 * 77.1*10^-9) / 1/2
λ = (2.66 * 77.1*10^-9) / 1/2
λ = 2.05*10^-7 / 1/2
λ = 4.10*10*^-7 m
λ = 0.41 μm
The longest wavelength requested therefore is 0.41 μm or 410 nm
In order for maximum work to be done...
free lil peezy and drake is kool
Answer:
For constant traveled distance and applied forces, apply the for parallel to the direction of the movement.
Explanation:
[tex]W = F.d = |F||d|cos(\theta)\\[/tex]
There are 3 components in the amount of work produced when applying a force to an object.
1. The amount of force applied
2. The distance that the object is traveled
3. The angle between the force vector and the distance vector
To get the maximum amount of work for a constant force and distance, the force needs to be along the distance traveled [tex]=> \theta = 0[/tex]If the angle and the distance are constant, the only way is to apply a larger force in magnitudeIf the angle and the force are constant, increasing the distance traveled will result in higher amount of work produced.Plz help me
Thank you so much
Answer:
I believe its the blue, sorry if I'm wrong
What happens to the temperature during an endothermic reaction? ANSWERS; The temperature stays constant. The temperature will decrease (get colder). The temperature will increase (get warmer)
Answer:
The temperature will decrease (get colder).
Explanation:
Enthalpy changes are heat changes accompanying physical and chemical changes. The enthalpy change is the difference between the sum of the heat contents of products and the sum of heat contents of reactants.
For an endothermic change, heat is absorbed for the reaction. The surrounding becomes colder at the end of the reaction and so is the reaction itself. The right choice is that the temperature will decrease.
Air only has a density of 1.3kg/m². What is the mass of
3m^3 of air?
Answer:
m = 3.9 [m³]
Explanation:
We must remember that the density of the substance is defined as the relationship between mass over volume. That is expressed in the following equation:
[tex]Ro = m/V[/tex]
where:
Ro = density = 1.3 [kg/m³]
m = mass [kg]
V = volume = 3 [m³]
Now replacing the values.
[tex]m =Ro*V\\m = 1.3*3\\\\m=3.9[m^{3}][/tex]
energy transfered electrically is measured in _____. what one word completes the sentence?give the fullname not symbol.
Answer:
joules
Explanation:
The electric energy transferred to a resistor in a time period is equal to the electric power multiplied by time, E=Pt, and can also be calculated using E=I2Rt. Electric companies measure their energy sales in a large number of joules called a kilowatt hour (kWh) which is equivalent to 3.6×106 J.
Someone can help me pls
Is physical science class
Answer:
I can't see the picture
Explanation:
A arrow of mass 0.20 kg is shot at 32.2 m/s. It hits an apple (m = 0.77 kg), and goes through the apple, leaving with a velocity of 18.3 m/s.
What is the velocity of the apple after the arrow leaves it?
answer in m/s
Answer:
The apple travels at 3.6 m/s
Explanation:
The Law Of Conservation Of Linear Momentum
The total momentum of a system of bodies is conserved unless an external force is applied to it.
The formula for the momentum of a body with mass m and speed v is:
P = mv
If we have a system of two bodies the total momentum is the sum of the individual momentums:
[tex]P=m_1v_1+m_2v_2[/tex]
If a collision occurs and the velocities change to v', the final momentum is:
[tex]P'=m_1v'_1+m_2v'_2[/tex]
Since the total momentum is conserved, then:
P = P'
Or, equivalently:
[tex]m_1v_1+m_2v_2=m_1v'_1+m_2v'_2[/tex]
Solving for v2':
[tex]\displaystyle v'_2=\frac{m_1v_1+m_2v_2-m_1v'_1}{m_2}[/tex]
The arrow has a mass of m1=0.2 kg and travels at v1=32.2 m/s. It hits an apple (assumed stationary at v2=0) of mass m2=0.77 kg and continues through the apple with a speed of v1'=18.3 m/s. We'll calculate the speed of the apple after the hit.
[tex]\displaystyle v'_2=\frac{0.2*32.2+0.7*0-0.2*18.3}{0.77}[/tex]
[tex]\displaystyle v'_2=\frac{2.78}{0.77}[/tex]
[tex]v'_2=3.6 \ m/s[/tex]
The apple travels at 3.6 m/s
The moving part of a speaker goes in and out 400 times per second. The frequency of the sound produced is:
a
4 hertz.
Ob
40 hertz.
400 hertz.
4,000 hertz.
The images below are models that represent the reactants and products of a chemical reaction.
Reactants Products
Based on the models, was mass conserved in this chemical reaction?
A.
No, because the purple atom formed two bonds in its reactant molecule and only one bond in its product molecule.
B.
No, because the reactants are made up of different types of molecules than the products.
C.
Yes, because the number of reactant molecules is the same as the number of product molecules.
D.
Yes, because the number of each type of atom is the same in the products as it is in the reactants.
Explanation:
In a chemical reaction, when mass is conserved , the number of atoms or moles of the reactants must be equal to the number of moles or atoms in the products side.
From the diagram, we should carefully look to see if the number of atoms that makes up the reactants are equal to those on the product side.
For example:
A + B → AB
Here, mass is conserved because, on the reactant side, we have 1 atom of A and on the product side we have 1 atom of A
For B, on the reactant side, we have 1 atom of B and on the product side, we have 1 atom of B.
Answer:
Yes, because the number of each type of atom is the same in the products as it is in the reactants.
Explanation:
3. The potential energy of an object is determined by: a. the movement of the object b. the position of the object c. the speed of the object d. Objects cannot have potential energy.
Answer:
B. the position of the object
How is energy stored in food?
Answer: There are little tiny batteries that are contained within the molecules of the food. The sun charges these batteries, and when the food is eaten, the energy from the batteries flows through the acids in the stomach, which gives the person or animal energy. In gasoline, the energy is created when the gasoline is set on fire and burned, there is no energy within it already. So they are different forms of energy. Hope this helps!
Answer:
Energy is stored in food as molecular bonds
Explanation:
Energy rich molecules are Glycogen, carbohydrates, triglycerides, and lipids are energy storage molecules,
A friction-less pulley in the shape of a solid cylinder of mass 2.90 kg and radius 30.0 cm is used to draw water from a well. A bucket of mass 1.90 kg is attached to a cord wrapped around the cylinder. If the bucket starts from rest at the top of the well and falls for 3.70 seconds before hitting the water, how deep is the well
Answer:
[tex]s=-38.332m[/tex]
Explanation:
From the question we are told that
Cylinder of mass [tex]m=2.90 kg[/tex]
Radius [tex]R=30.0 m[/tex]
Mass of bucket [tex]M_b= 1.90 kg[/tex]
Fall time [tex]T_f= 3.70 seconds[/tex]
Generally the tension the bucket is mathematically given by
[tex]T-mg=ma[/tex]
For cylinder
[tex]T=I*\alpha[/tex]
where
[tex]I=1/2mR^2[/tex]
[tex]a=R*\alpha[/tex]
Giving
[tex]T=-1/2mR\alpha[/tex]
Therefore
[tex]a=\frac{-mg}{m+1/2m}[/tex]
[tex]a=\frac{-(1.9*9.81)}{1.9+0.5*(2.9)}[/tex]
[tex]a=-5.563880597 \approx -5.6m/s^2[/tex]
Generally the Newton's equation for motion is mathematically represented as
[tex]s=ut+1/2at^2[/tex]
[tex]s=0(3)+1/2*-5.6*(3.7)^2[/tex]
[tex]s=-38.332m[/tex]
helpp! thanks i need it
Parts of a transverse wave include:
Crest - the ___________ point on the wave
Trough - the _________ point on the wave
Wavelength - the __________ from one crest to the n3ext crest, or one trough to the next trough
Amplitude - the _________ of the wave from the midpoint to the highest point (crest) or the lowest point (trough)
Answer:
Parts of a transverse wave include:
Crest - the highest point on the wave
Trough - the lowest point on the wave
Wavelength - the distance from one crest to the next crest, or one trough to the next trough
Amplitude - the displacement of the wave from the midpoint to the highest point (crest) or the lowest point (trough)
Explanation:
Use the internet Brother
Answer:
Parts of a transverse wave include:
Crest - the highest point on the wave
Trough - the lowest point on the wave
the answer is: WAVELENGTH - the distance from one crest to the next crest, or one trough to the next trough
Amplitude - the displacement of the wave from the midpoint to the highest point (crest) or the lowest point (trough)
Explanation:
explain the relationship between
the number of ions and the scale.
Answer:
The pH of a system is dependent on the concentration of hydrogen ions present in that system. The concentration of hydrogen ions in a solution is the amount of hydrogen ions (in the units of mol) present in a liter of solution.
Explanation:
A roller coaster typically takes 6.5 s to come to a complete stop from traveling at 30 m/s. If it has a force of 540 N, what is the mass of the coaster
Answer:
117 kg
Explanation:
Step one:
given data
time t= 6.5s
velocity v= 30m/s
Force F= 540N
Required
the mass m
Step two:
Recall from the expression
Ft= mv
make m subject of the formula
m= Ft/v
substitute
m= 540*6.5/30
m=3510 /30
m=117 kg
PSYCHOLOGY:
A mnemonic device is a strategy used to improve memory.
True or false.
Answer:
True
Explanation:
A mnemonic device is a method employed to make the memory have the ability to remember things, improve the memory, and generally improve the long term ability of the memory such that the brain develops more ability to store information until when needed and collect the stored information when needed. This is achievable when the information that needed to be remembered are stored using rhymes of songs, abbreviations of words using the initial letters. For example, "MR NIGER D" can be used to store the characteristics of living things like:
M - movement
R - Respiration
N - Nutrition
I - Irritability
G - Growth
E - Excretion
R - Reproduction
D - Death
Answer:
true
Explanation:
edge2020
The portion of a sound wave with higher-than-normal pressure is called a(n)________
Answer:
Condensation
Explanation:
Increased pressure is called condensation or compressions because they are regions of high air pressure whilst rarefractions are low air pressure.
Pam, with a mass of 40.4 kilograms, straps on a rocket pack while wearing her roller blades. The rocket supplies a constant force for 26.7 meters, and Pam acquires a speed of 26.0 meters per second. a. What is Pam's final kinetic energy
Answer:
13.66 kJ
Explanation:
Given that
Mass of Pam, m = 40.4 kg
Distance moved by the force, d = 26.7 m
Speed attained by Pam, v = 26 m/s
The kinetic energy is given by the formula, K.E = 1/2 mv², where
K.E = the needed kinetic energy
m = mass of the object(Pam)
v = velocity of the object(Pam)
Applying the formula, we have
K.E = 1/2 * 40.4 * 26²
K.E = 20.2 * 676
K.E = 13655.2 J
The Kinetic Energy is 13.66 kJ
8. A jaguar runs 4200 meters at the speed of 400 meters per minute. How
much time did this take? (You can use the speed triangle if it helps! Write
the formula, plug in the numbers, and write the answer with a box around it
Answer:
10.5min
Explanation:
Given parameters:
Distance = 4200m
Speed = 400m/min
Unknown:
Time taken for this run = ?
Solution:
Speed is the distance divided by the time taken.
Speed = [tex]\frac{distance }{time }[/tex]
Time = [tex]\frac{distance}{speed }[/tex]
Now insert the parameters and solve;
Time = [tex]\frac{4200}{400}[/tex] = 10.5min
A cyclist travelled 32 kilometers for both the 1st and 2nd hours. He took a 30 minute break to eat his lunch. He then travelled 15 kilometers for the final 3rd hour. What is the cyclist's average speed?
Answer:
The cyclist's average speed is 13.43 [tex]\frac{km}{h}[/tex]
Explanation:
Speed is a quantity that expresses the relationship between the space traveled by an object and the time used for it. That is, speed is the magnitude that expresses the variation in position of an object and as a function of time, which would be the same as saying that it is the distance traveled by an object in the unit of time.
Average speed relates the change in position to the time taken to effect that change:
[tex]speed=\frac{change in position}{time} =\frac{distance}{time}[/tex]
In this case:
total distance traveled= 32 km + 15 km= 47 kmtotal time= 3 hours that the cyclist travels + 30 minutes of rest = 3 hours + 0.5 hours (being 60 minutes equal to 1 hour, then 30 minutes equals 0.5 hours) = 3.5 hoursReplacing:
[tex]speed=\frac{47 km}{3.5 h}[/tex]
and solving, you get:
speed= 13.43 [tex]\frac{km}{h}[/tex]
The cyclist's average speed is 13.43 [tex]\frac{km}{h}[/tex]
A student slides a rock along the flat surface of a frozen pond. The rock starts to slow down after several seconds. Construct an explanation using Newton's Laws that describes why the rock begins to decelerate.
Answer:
When the student slides the rock along the flat surface of the frozen pond, according to Newton's second law of motion, the rock is given an initial velocity of motion. According to Newton's first law of motion, the rock will continue to slide indefinitely unless it is slowed or stopped by an opposite force. According to Newton's third law, the rock experiences a reaction force from the force of friction of the ice which slows it down at a rate given by Newton's second law of motion and the rock is seen to decelerate
Explanation:
Newton's first law of motion, states that an object will remain at rest or maintain a uniform motion in a straight line, unless impressed upon by an external force
Newton's second law states that an applied force is equal to the rate of change of momentum it produces
Newton's third law states action and reaction are equal and opposite.