Answer:
A) 464m/s
B)185m/s
C)345m/s
1. How far does a 70 kg object move in meters (m) if it
accelerates at 13 m/s2 and 50 joules of work is done?
Answer:
Units of work would be equivalent to a Newton times a meter. ... An individual force does NOT do positive work upon an object if the object is moving at ... FALSE - Watt is the standard metric unit of power; Joule is the standard metric unit of energy. ... TRUE - A kg•m2/s2 is a mass unit times a speed squared unit, making it a ...
what is the efficiency of an engine that puts out 250 J of work for every 500 J of heat put into it?
If you put 300 J of heat into an engine with an efficiency of 0.35, how much work can be done? 3. How much energy must be put into an engine with an efficiency of 0.6 if 270 J of work are required? 4. An engine with an efficiency of 0.425 uses 1200 J of energy. Find the amount of energy wasted by the engine. 5. Calculate the efficiency of an engine operating between temperatures of 258 K and 600 K 6. An engine runs with its exhaust (cold) reservoir at a temperature of 200 K. To what temperature should the input (hot) temperature be set if an efficiency of 0.8 is desired? 7. Complete the following table of temperatures. Fahrenheit Celsius Kelvin 213 15 98.6 75 408
1. List the four fundamental forces from weakest to strongest.
Answer:
1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity.
Explanation:
A copper atom has an atomic number of 29 and an atomic mass of 64. What
is the structure of this atom?
A. It has a central nucleus composed of 29 protons and 29 neutrons,
surrounded by an electron cloud containing 35 electrons.
B. It has a central nucleus composed of 29 protons and 35 neutrons,
surrounded by an electron cloud containing 29 electrons.
C. It has a central nucleus composed of 35 protons and 29 neutrons,
surrounded by an electron cloud containing 29 electrons.
D. It has a central nucleus composed of 29 protons and 64 neutrons,
surrounded by an electron cloud containing 29 electrons.
SUBMIT
The answer is B. It has a central nucleus composed of 29 protons and 35 neutrons, surrounded by an electron cloud containing 29 electrons.
Given the data from the question, the correct statement is:
It has a central nucleus composed of 29 protons and 35 neutrons, surrounded by an electron cloud containing 29 electrons (Option B) Composition of atomAn atom is composed of a centrally placed nucleus (containing protons and neutrons) and a cloud of electrons revolving round it.
How to determine the number of neutrons Mass number = 64Proton = 29Neutron =?Mass number = Proton + Neutron
64 = 29 + Neutron
Collect like terms
Neutron = 64 – 29
Neutron = 35
Note
Proton = Electron = 29 (since the atom is neutral)
Thus, we can conclude that the atom has central nucleus composed of 29 protons and 35 neutrons, surrounded by an electron cloud containing 29 electrons (Option B)
Learn more about composition of atoms:
https://brainly.com/question/886387
Question: Describe what drives the cycling of water between the different phases and locations on Earth.
Answer:
Water set free by magma began to cool down the Earth's atmosphere, until it could stay on the surface as a liquid. ... The sun, which drives the water cycle, heats water in the oceans. Some of it evaporates as vapor into the air. Ice and snow can sublimate directly into water vapor.
What is the main source of carbon dioxide in the atmosphere
Answer: respiration by animals and plants and burning of fuel.
Explanation: would be happy if u give me branliest pls do it
Un cilindro contiene 10 L de oxígeno y otro contiene 10 L de dióxido de carbono, ambos se encuentran a 25 °C. De acuerdo con el modelo cinético de partículas, se puede afirmar que...
Answer:
Ver explicacion
Explanation:
Según el modelo cinético, las moléculas de gas están en constante movimiento.
La energía cinética promedio de las moléculas del gas depende de la temperatura del gas y de la masa molar del gas.
Si los dos gases ocupan el mismo volumen a la misma temperatura, la energía cinética promedio ahora depende de la masa molar de los gases individuales. Cuanto menor sea la masa molar del gas, mayor será la velocidad media de las moléculas del gas.
El oxígeno gaseoso tiene una masa molar menor que el dióxido de carbono. Por lo tanto, el oxígeno tiene una velocidad molecular promedio mayor que el dióxido de carbono.
La velocidad de crucero de un avión comercial es de 900 km / h. La velocidad más alta jamás alcanzada en una carrera de Fórmula 1 es 303,5 m / s. ¿Cuál de los dos es mayor?
Answer:
La velocidad más alta jamás alcanzada en una carrera de Fórmula 1 es mayor que la velocidad de crucero del avión comercial.
Explanation:
Para poder comparar la velocidad entre el avión comercial y la velocidad alcanzada en la carrera de Fórmula 1 y saber cuál es mayor, dichas velocidades deben estar expresadas en las mismas unidades.
En este caso, se ha decidido expresar la velocidad del avión en m/s. Siendo 1 km equivalente a 1.000 m y 1 h igual a 3.600 segundos, entonces es posible realizar la siguiente conversión:
[tex]900\frac{km}{h} =900\frac{1.000 m}{3.600 s}= 250 \frac{m}{s}[/tex]
Por lo que 900 km/h es equivalente a 250 m/s. Siendo 303,5 m/s mayor a 250 m/s, entonces la velocidad más alta jamás alcanzada en una carrera de Fórmula 1 es mayor que la velocidad de crucero del avión comercial.
Is this right? Please help me
Could really use some help plzzzz
Please refer to the attachmenT;)))) I'm so lazy to solve it;)(((
most neutral atoms of fluorine have an atomic mass of 19 amu and an atomic number of 9. what are these atoms composed of
Answer:
An atom of fluorine has the atomic number 9, and its mass number is 19 amu. Which of the following shows a neutral atom of fluorine? 16 protons and 14 electrons.
Explanation:
ITs 16 protins and 14 ELECTRONS
Answer:
Answer is 9 Protons, 10 Neutrons, and 9 Electrons
Explanation:
A.P.E.X
A backpack weighs 8.2 Newtons and has a mass of 5 kilograms on the moon what is the strength of gravity on the moon
i dont get it so much but
The weight of the bag pack is 8.2 N. g = 1.64 m/s2. Hence, the acceleration due to gravity on moon is 1.64 m/s2. sooo? is it right
plz help
Potential energy is often called
Question 1 options:
moving energy
stored energy
new energy
size energy
Answer: Stored energy
How does electricity flow through a conductor?
Answer:
Electricity works by getting a bunch of conductor elements together and creating a flow of electron-stealing patterns through them. This flow is called a current. Conductors need to be surrounded with insulators so the electrons can only go in one direction.
Explanation:
As you move from left to right across the periodic table, what happens (in terms of metals/nonmetals, etc.)?
Answer:
Hope it helps;)
Have a good day
If the 250 kg bumper car that you are riding in hits another bumper car that is sitting still while driving 3.5 m/s, how much force did your bumper car have while moving?
Answer:
875 N
Explanation:
From this question, you didn't state the time taken for the bumper car to move or to hit the other bumper car. In calculations of force, time is often needed, because
Force = mass * acceleration, while
Acceleration = velocity / time, basically
Force = mass * velocity / time.
We have our mass, we have our velocity, but we haven't time. So, for this calculation, I'd assume our time to be 1s.
Going by the formula I stated, we can then say that
Force = 250 * 3.5 / 1
Force = 875 N
This means the force my bumper car have while moving at 3.5 m/s for an estimated time of 1s is 875 N
Suppose a uniform electric field of 4 N/C is in the positive x direction. When a charge is placed at and fixed to the origin, the resulting electric field on the x axis at x = 2 m becomes zero. What is the magnitude of the electric field at x = 4 m on the x axis at this time?
Answer:
E_total = 3 N / A
Explanation:
The electric field is a vector magnitude so when adding we must use vectors, in this case as the initial field E = 4N / c goes towards the axis axis and the field created by the fixed charge (E1) is also on the axis x we can add in scalar form.
E_total = E + E₁
the expression for the field of a point charge is
E₁ = k q₁ / r²
for the point x = 2m, they do not say that the total field is zero, so the charge q1 must be negative
E_total = E -k q₁ / r₂
we substitute
0 = E - k q₁ / r²
q₁ = [tex]\frac{E r^2}{k}[/tex]
let's calculate
q₁ = [tex]\frac{4 \ 2^2}{9 \ 10^{-9}}[/tex]
q₁ = 1.78 10⁻⁹ C
now we can calculate the field for position x = 4 m
E_total = 4 - 9 10⁹ 1.78 10⁻⁹ / 4²2
E_total = 3 N / A
A man started at his house and went to the post office, then to the pet store, and finally home again. What is the average velocity if this trip took three hours?
Explain how you arrived at your answer.
Answer:
0
Explanation:
Defining velocity :
Velocity is a vector which is the ratio of a person's total displacement with time.
Displacement, in simple terms refers to the distance between an individual's initial position to his final position.
Man's initial position = House
After all his navigation and points covered irrespective of the distance ;
Final position = House
Hence, we can conclude that the man's Displacement is ;
Final position - Initial position = 0
Hence,
Velocity = Displacement / time taken
Velocity = 0 / 3
Velocity = 0
An 6 kg object accelerating from 17 m/s to 10 m/s. What is the change in momentum of the object?
Answer:
Explanation:
Comment
It's a deceleration. You are slowing down.
Givens
vi = 17 m/s
vf = 10 ms
m = 6 kg
delta mv = ?
Formula
delta mv = m * (vf - vi)
Solution
delta mv = 6 (10 - 17)
delta mv = 6 ( -7)
delta mv = - 42
What is so soothing about the ocean? And why are some people afraid of the ocean?
Answer:
hydrophobiaExplanation:
it is phobia of waterand please add me on sñap
arshad2623fI hope u will add meThe ocean is very calm and beautiful its so soft and the waves are beautiful especially at night.
Some people are afraid of the ocean because of probably sharks, fish, or those grass in the ground. some times they think the ocean is going to take them away i think thats a phobia.
Based on the table,which car had the slowest speed??
Answer:
car 4 i think
Explanation:
Answer:
car 3
Explanation:
car 1 - fastest - .5 seconds per meter
car 2- 2nd fastest - 1 second per meter
car 4 - 3rd fastest - 1.25 seconds per meter
car 3 - slowest - 1.5 seconds per meter
bill nye electricity notes
Answer:
the answer is c
Explanation:
(need help asap!!)
if the angle between two forces is smaller, what will happen to it's resultant force? will it be bigger or smaller?
Answer:
if more angle = high resultant force.
as resultant force is directly proportional to the angle.(mgsintheta
In an experiment to find the specific heat capacity of a metal, it is found that 5200 J is needed to raise the temperature of a 2kg block by 20 °C
What value for the specific heat capacity is given by these results?
A 130 J/(kg C)
B 520J/(kg C)
С 52 000 J/(kg°C)
D 104 000 J/(kg°C)
Answer:
A. 130J / kg°C
Explanation:
Amount of heat (Q) = 5200 J
mass (m) = 2 kg
temperature (dt) = 20°C
specific heat capacity (S) = ?
We know
Q = msdt
5200 = 2 * s * 20
s = 5200 / 40
s = 130 J /kg °C
Hope it will help :)
What is one advantage of using electromagnets instead of permanent magnets
How do the lungs help maintain the body's pH
balance?
Answer:by removing carbon dioxide from the body
Explanation:
I just got it right
You are standing on the bleachers in the gym. What supporting force are you experiencing?
a. Friction
b. Tension
c. Gravity
d. Normal
Part A
The simulation shows radio waves emitted by an electron that is in a radio transmitter. The window in
the bottom-right corner shows the wave emitted by the transmitter. Move the electron up and down, and
observe the wave it emits in the window. Change the speed of the motion of the electron. What
relationship do you notice between speed and wavelength?
Answer:
The wavelength decreases as the electron speeds up. The wavelength increases as the electron slows down.
Explanation:
define one ohm resistance
Answer:
1 Ohm is defined as the resistance of a conductor with a potential difference of 1 volt applied to the ends through which 1-ampere current flows. Ohms is the SI unit of electrical resistance
(1 mark)
(b)
Electricity can also be generated in a pumped storage hydroelectric power station
An advantage of pumped storage hydroelectric power stations is the short start-up fime
they have
(b) (i) What is the importance of the short start-up time?
(1 mark)
(b) (ii) Give one other advantage of a pumped storage hydroelectric power station.
(1 mark)
Answer:
It gives the generating plant more water to use to generate electricity