Answer:
The unit of speed is m/s.
What acceleration would be achieved by a 5N thrust motor in a 0.30kg
Answer:
F=ma
5N=0.3a
a=5/0.3=16.66m/s²
PLEASE GIVE BRAINLIEST
Answer:
16.7
Explanation:
acceleration=force/mass
Water
Glass
A ray of light enters glass at 45° to the horizontal from water. If
the index of refraction of water is 1.3, and index of refraction of
glass is 1.5, then what is the angle of the refracted ray?
Answer: 22
Explanation:
A person has a gravitational force (weight) of 600 N on Earth. Suppose the mass of the Earth is double and the radius shrinks to 1/3 of what it currently is. Calculate your new weight.
Explanation:
that's impossible,the radius of the earth can't decrease when the mass doubles!
Assume that a vaulter is able to carry a vaulting pole while running as fast
as Carl Lewis in his world record 100-m dash (around 12 m/s). Also assume
that all of the vaulter's kinetic energy is transformed into gravitational
potential energy. What vaulting height could that person attain?
(Hint: Use the equation 5 mu? = mgh.)
Answer:
5mu = carry a vaulting pole ( 12 m/s) Also
fast
All the vaulter's kinetic energy is transformed into gravitational potential energy. 7.35m is the that person's height.
What is kinetic energy ?Kinetic energy is the energy that an object has as a result of its movement. If we want to accelerate an object, we must apply force to it. Using force requires us to put in effort. After work is completed, energy is transferred to the object, and the object moves at a new constant speed.
The two most important factors influencing kinetic energy are mass and speed. Because an object's motion is determined by its velocity as well as its mass, though velocity is th
Given:
v = 12m/s
g = 9.8 m/s²
Kinetic energy = potential energy
K.E = P.E
1/2 mv² = mgH
H = v² /2g
H = 7.35m
Thus, 7.35m is the that person's height.
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1
1) If you wanted to save money on your electric bill, all of the following would help except:
OA
using light bulbs that produce more light and less heat
OB.
using a heater that converts more energy into work
O c. lowering the temperature in your hot water
OD. leaving the refrigerator open to increase air circulation
Reset
Next
Answer:
D
Explanation:
I don't know how to explain but D is just weirdly wrong to me.
how much kinetic energy is produced when an object having mass of 50gm throwing with velocity 80m/s?
Answer:
KE = 160 J
Explanation:
KE = 1/2mv²
mass= 50gm = 0.05kg
velocity = 80
KE = 1/2 x 0.05 x 80²
= 1/2 x 0.05 x 6400
= 160
The kinetic energy produced in an object is equal to 160 J.
What is the kinetic energy and potential energy?The energy possessed by a moving body due to its motion is known as kinetic energy. Work must be done in order to change the kinetic energy of a moving object.
The kinetic energy of a moving body can be measured from the formula mentioned below:
K.E. = ½mv² where ‘m’ is the mass and ‘v’ is the velocity of the object.
Potential Energy (P.E.) can be described as the stored energy in an object due to its position and is expressed as P.E = mgh where m, g, and h are the mass, gravitational acceleration, and height respectively.
Given, the mass of the object =, m = 50 g = 0.05 Kg
The velocity of the object, v = 80 m/s
The kinetic energy = (1/2)× 0.05 ×(80)²
K.E. = 160 J
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help pls. will make brainliest
Answer:
Explanation:
D the 13 amp fuse, so that the cable won't be over it's current limit.. and the heater will have lots of current.. to keep you toasty :P if you pick any fuse smaller then the 13 the heater will "blow" those fuses :/
In order to attain orbit around earth, the ATLAS-V rocket must accelerate up to a
speed of about 7700m/s in about 11 minutes.
a) What average acceleration is required to accomplish this?
b) If the mass of the rocket + fuel is 3.05x105 kg, what is the applied force of the engine?
How do I substitute and solve?
I see how it is 3.2 divide it by 1000 kg ×9.80, but I get confused with the end product.
My question is
[tex]2.4n \div (1000 \frac{kg}{m {}^{3} } ) \times (9.80 \frac{m}{s {}^{2} } )[/tex]
N is Newtons
Will give Brainly for correct answer
Nevermind I'm good now!❤
3.2 N = 3.2 kg•m/s²
and
(1000 kg/m³) (9.80 m/s²) = 9800 kg/(m² s²)
Then
(3.2 N) / ((1000 kg/m³) (9.80 m/s²)) = (3.2 kg•m/s²) / (9800 kg/(m² s²))
… = 3.2/9800 m³
… = 0.00032653… m³
and converting to scientific notation gives
… = 3.2653… × 10⁻⁴ m³
Why is average global temperature the most important value when talking about climate change?
Answer:
The most important number's formal name is "equilibrium climate sensitivity," and it's meant to represent the new equilibrium in surface temperatures after a change in the amount of the Sun's energy trapped here on Earth rather than radiated back to space.
Explanation:
please give me brain list and follow
The average global temperature is the most important value when talking about climate change because the Earth's temperature is increasing day by day due to the trapping of the Sun's light energy.
What is temperature?The temperature is the degree of hotness or coldness of the object.
The equilibrium climate sensitivity is the equilibrium in Earth's surface temperature. After the Sun's trapped energy is reduced, the climate changes accordingly.
Thus, the average global temperature is the most important value when talking about climate change because the Earth's temperature is increasing day by day due to the trapping of the Sun's light energy.
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An Aluminium stick of length 1.5 m is cooled from 200 C to -1800 C. Find the final length if its coefficient of linear expansion is 23×10-6/K?
Answer:
1.454 m
Explanation:
From the question,
L₂ = L₁+α(T₂-T₁).................. Equation 1
Where L₂ = Final Length, L₁ = Initial Length, α = Coefficient of Linear expansion, T₁ = Initial Temperature, T₂ = final Temperature.
Given: L₁ = 1.5 m, α = 23×10⁻⁶ K⁻¹, T₁ = 200 °C, T₂ = -1800 °C
Substitute these values into equation 1
L₂ = 1.5+[23×10⁻⁶ ×( -1800-200)
L₂ = 1.5+(23×10⁻⁶×2000)
L₂ = 1.5+(-0.046)
L₂ = 1.5-0.046
L₂= 1.454 m.
What is a 7 letter word that describes the relationship between frequency and period?
plssss helpppp it’s urgent
The figure below shows two forces A=15 N and B=5 N acting on an object. What is the
resultant force on the object?
Answer:
18.03 N
Explanation:
From the fiqure below,
Using parallelogram law of vector
R² = 15²+5²-2×5×15cos(180-60)
R² = 225+25-150cos120°
R² = 250-150(-0.5)
R² = 250+75
R² = 325
R = √325
R = 18.03 N
Hence the resultant force of the object is 18.03 N
What is the gravitational energy of a 2.63kg
book when it is lifted 14.29m off the floor?
Give your answer rounded to one place after the
decimal, no units.
Question 3
Answer:
G.P.E = 368.3
Explanation:
Given the following data;
Mass = 2.63kg
Height, h = 14.29m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the gravitational potential energy;
Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
[tex] G.P.E = mgh[/tex]
Where;
G.P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
[tex] G.P.E = 2.63*9.8*14.29 [/tex]
G.P.E = 368.3
Note: the unit of gravitational potential energy is Joules.
When ripples pass though a gap in a barrier what is observed
(b) Figure 4 shows a car travelling on a motorway.
A passenger wants to check the accuracy of the speedometer of the car.
The car is travelling at a constant speed.
The passenger has a stopwatch.
The lamp posts are 40 m apart.
lamp post
Figure 4
Describe how the passenger could determine the speed of the car as accurately
as possible.
(3)
Answer:
To calculate anything - speed, acceleration, all that - we need data. The more data we have, and the more accurate that data is, the more accurate our calculations will be. To collect that data, we need to measure it somehow. To measure anything, we need tools and a method. Speed is a measure of distance over time, so we'll need tools for measuring time and distance, and a method for measuring each.
Conveniently, the lamp posts in this problem are equally spaced, and we can treat that spacing as our measuring stick. To measure speed, we'll need to bring time in somehow too, and that's where the stopwatch comes in. A good method might go like this:
Press start on the stopwatch right as you pass a lamp postEach time you pass another lamp post, press the lap button on the stopwatchPress stop after however many lamp posts you'd like, making sure to hit stop right as you pass the last lamp postRecord your dataCalculate the time intervals for passing each lamp post using the lap dataCalculate the average of all those invervals and divide by 40 m - this will give you an approximate average speedOf course, you'll never find an *exact* amount, but the more data points you have, the better your approximation will become.
What does static on the radio refer to?
A. amplitude
O B. frequency
C. noise
D. station
Answer:Station
Explanation:
How do you think the body deals with consuming a lot more
calories than are burnt?
Answer:
The body stores it as fat
Explanation:
Answer:
The body deals with consuming alot more calories than are burnt by gaining weight or holds it all up, while if you burn your calories, it'll lose weight :3
Explanation:
:3
What type of motion does this diagram represent? *
Answer:
object at rest
Explanation:
Which of the following is the best example of work being done on an object? *
-holding a 50kg weight
-lifting a bag of groceries from the floor
-holding down a compressed spring
-pushing a boulder that will not move
Answer:
lifting a bag of groceries.
work is force by distance, if there is no movement there is no work done
How much power is needed to lift a 20-kg object to a height of 4.0 m in 2.5 seconds?
Answer:
313.92w
Explanation:
Formula for power:
P=W/∆t = Fv
Givens:
m=20kg
∆y=4.0m
∆t=2.5s
a=9.81m/s²
In order to find power, we first need to solve for work.
W=Fd (force*displacement), f=mg
W=mg∆y
W=(20kg)(9.81m/s²)(4.0m)
W=784.8J
P=W/∆t
P=784.8J/2.5s
P=313.92 watts
Ava walked 3 blocks south, 5 blocks east, and then another 3 blocks south. Which diagram has the correct vectors for Ava's walk and her displacement ? Remember, the starting point of each part of the trip is the beginning of the arrow and the ending point is the pointed end of the arrow.
(Sorry i couldn’t get all the answers in one picture, and Brainly won’t let you use more then one)
Answer:
A.
Explanation:
Model A shows the arrow moving down 3 (south), right 5 (east), then again 3 down (south).
When that same man hammers harder on the ladder, the waves created will transfer more energy. True or False
Answer:
True
Explanation:
You flip a coin straight up if the coin reaches a high point of 0.25 m above where you released it what was the initial speed?
Answer: 2.21 m/s
Explanation:
Given
Coin reaches a height of 0.25 m above the launch point
Suppose u is the initial speed of the coin
Using the equation of motion
[tex]\Rightarrow v^2-u^2=2as\\[/tex]
Putting values
[tex]\Rightarrow 0^2-u^2=2\times g\times s=2\times (-9.8)\times 0.25\\\Rightarrow u^2=4.9\\\Rightarrow u=2.21\ m/s[/tex]
Thus, the initial velocity is 2.21 m/s
What is a key difference between transverse and longitudinal waves?
A.) Transverse move up and down while longitudinal can do in any direction.
B.) Transverse can e described as troughs and crest while, longitudinal waves can be described as compression and rarefactions.
C.) There is no difference, it depends on the scientific uses and calculations involved.
D.) Transverse waves can only represent sound while longitudinal are represented by ocean waves, light and other waves
Answer:
B.) Transverse can e described as troughs and crest while, longitudinal waves can be described as compression and rarefactions.
Please help!!!! I need a good grade on this test !!!! Plssss
Answer:
There’s nothing in the pic
Explanation:
Just like my bf ... nonexistent
Fission reactions are currently used to provide energy for many different sources. Where does the energy produced during the reaction come from?
Answer: From the mass lost during the reaction, or the mass defect.
The energy produced during a reaction come from the heat energy which is released during splitting of uranium atoms.
What is a fission?Nuclear energy originates from the splitting of uranium atoms in the atmosphere, a process called as fission. This reaction generates heat energy to produce steam, which is used by a turbine generator to generate electric energy. Because, the nuclear power plants do not burn fuel, they do not produce any greenhouse gas emissions.
Uranium and plutonium are the most commonly used atoms for fission reactions in nuclear power reactors because they are very easy to initiate and control with time. The energy which is released by fission in these reactor heats water into the steam. The steam generated is used to spin a turbine to produce carbon-free electric energy.
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What does the atomic number of an atom tell us?
How much the atom weighs
The number of protons in the atom
Which column the element is in on the periodic table
The number of electrons it is likely to lose
Explanation:
The atomic number (Z) of an element is the number of protons in the nucleus of each atom of that element. This means that the number.
That means 12.01 grams of carbon contains 6.0225*1023 atoms of carbon. If you divide the atomic weight by Avogadro's number, you get the mass of one atom. In the case of carbon, that ends up being 0.000000000000000000000019942 grams.
The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass. For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons.
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
Car A has a mass of 2000 kg and is going 28 m/s east.
Car B has a mass of 4000 kg and is going 13 m/s west.
What will be the momentum of both cars together after the collision?
