A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. The atmosphere is the layers of air wrapped around the Earth. That air has a weight and presses against everything it touches as gravity pulls it to Earth. Barometers measure this pressure.
You are pushing a 20 N object for 3 meters. If you have to push
vith 30 N to do this, how efficient is your work?
Answer:
For the first equation, the work done would be 60 J, but if it is done with 30 N, it would have been 90 J.
Explanation:
it's actually pretty easy one you practice it for some time. W ( work done in joules ) = F ( force put onto the object in newtons ) * D ( distance traveled in meters ).
Push is defined as a force that moves an object out of its resting position and away from the person exerting the push. When something is pushed, it usually moves away. Examples of push force include kicking a ball, shutting a door, pushing a cart, and plugging something in.
What role of force in push to work?A push or pull that causes something to move is called a force. Every day, whether you're playing soccer, pushing a shopping cart, or pulling mittens onto your hands, you're moving objects!
An example of a push force is the force you use to push up against a wall. The force you use to pull a trolley vehicle is an example of pull force.
Every force is a push or a pull. A push occurs when an object is forced to move away from something. A pull occurs when an object is drawn toward you by force. Energy, friction, and gravity all have an impact on how strong or weak the force is.
Therefore, Once you practice it for some time, it's actually rather simple. Work in joules is equal to force on an object in newtons multiplied by D. (distance traveled in meters).
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a
A student shakes the end of
a rope
with
frequency of 1.5 Hz, causing waves with a
wavelength of 0.8 m to travel along the rope.
What is the velocity of the waves?
Answer:
1.2m/s
hope this helps!
The required velocity of the waves is 1.2 meters per second.
What is wavelength?Wavelength is a fundamental property of waves, including electromagnetic waves like light and radio waves, as well as other types of waves, such as sound waves or water waves.
Here,
The velocity of a wave can be calculated using the equation:
Velocity = frequency × wavelength
In this case, the frequency is 1.5 Hz and the wavelength is 0.8 m. Therefore, the velocity of the waves is,
Velocity = 1.5 Hz × 0.8 m = 1.2 m/s
So the velocity of the waves is 1.2 meters per second.
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put the correct terms with the correct pictures
Answer:
Mass: Choices 1, 2, 4, 6
Weight: Choices 3, 5, 7, 8
Hope this helped! Please mark Brainliest if correct.
What is the wavelength of a wave if its frequency is 256 Hz and speed of the wave is 350 m/s?
Answer:
Explanation:
The equation for this is
[tex]f=\frac{v}{\lambda}[/tex] where f is the frequency, v is the velocity, and lambda is the wavelength. Filling in:
[tex]256=\frac{350}{\lambda}[/tex] and
[tex]\lambda=\frac{350}{256}[/tex] which means that
the wavelength is 1.37 m, rounded to the correct number of significant digits.
Sabiendo que la masa de Marte es de 6,42 · 1023 kg y que su diámetro medio es de 6794 km, calcula el valor de la aceleración de la gravedad sobre la superficie del planeta. Datos: Constante de gravitación universal = 6,67 · 10–11 Nm2/kg2.
Answer:
La aceleración de la gravedad sobre la superficie del planeta es 3,71 m/s².
Explanation:
Podemos encontrar la aceleración de la gravedad de Marte usando la siguiente ecuación:
[tex] F = \frac{GmM}{r^{2}} = ma [/tex]
En donde:
G: es la constante gravitacional = 6,67x10⁻¹¹ Nm²/kg²
m: es la masa del cuerpo que está sobre la supericie del planeta
M: es la masa de Marte = 6,42x10²³ kg
r: es la distancia del centro del planeta a la superfice = d/2
a: es la aceleración de la gravedad =?
Entonces, la aceleración de la gravedad es:
[tex] a = \frac{GM}{r^{2}} = \frac{6,67\cdot 10^{-11} Nm^{2}kg^{-2}*6,42 \cdot 10^{23} kg}{(3,397 \cdot 10^{6} m)^{2}} = 3,71 m/s^{2} [/tex]
Por lo tanto, la aceleración de la gravedad sobre la superficie del planeta es 3,71 m/s².
Espero que te sea de utilidad!
mechanical advantage is always less than velocity ratio,why?
because mechanical advantage decreases due to the friction and weight of moving parts of the machine whereas the velocity ratio remains constant
hope it helps you
Explain what cardiovascular exercise is in your own words. Explain the benefits of it and how it is different than muscular strength. Give 3 examples of cardiovascular exercises/activities
Find all the missing elements:
Answer: 80
Explanation:
Answer:
C=20
a = 10.8
c= 4.3
Explanation:
The machine in the figure is ideal and an effort force of
7.0 N just lifts a 14.0 N box situated 0.75 m from the
pivot, what is the distance from the pivot point to
where the effort force is exerted?
Answer:
1.5 m
Explanation:
Let the distance from the box to the pivot be c.
Let the distance from the pivot to the effort be y.
From the question given above, the following data were obtained:
Effort force (Fₑ) = 7 N
Force of resistance (Fᵣ) = 14 N
Distance from the box to the pivot (c) = 0.75 m
Distance from the pivot to the effort (y) =?
Clockwise moment = Fₑ × y
Anticlock wise moment = Fᵣ × c
Clockwise moment = Anticlock wise moment
Fₑ × y = Fᵣ × c
7 × y = 14 × 0.75
7 × y = 10.5
Divide both side by 7
y = 10.5 / 7
y = 1.5 m
Therefore, the distance from the pivot to the effort is 1.5 m
10 joules of work (energy) is required to transfer 2 coulombs of charge from X to Y. What is the potential difference between these two points?
Answer:
5v
Explanation:
W = 10J ;Q = 2C ;V = ?
So,potential between x and y is 5v
Hope it will help you if not so please sorry.
A 3.0-kilogram steel block is at rest on a frictionless, horizontal surface. A 1.0-kilogram lump of clay is propelled horizontally at 6.0 meters per second toward the block, as shown in the diagram below.
Answer:
1.5 m/s
Explanation:
Upon collision, the clay and steel block stick together and move to the right with a speed of 1.5m/s.
What is conservation of momentum principle?When two bodies of different masses move together each other and have head on collision, they travel to same or different direction after collision.
The external force is not acting here, so the initial momentum is equal to the final momentum. For inelastic collision, final velocity is the common velocity for both the bodies.
m₁u₁ +m₂u₂ =(m₁ +m₂) v
Substitute the values for m₁ = 3kg, m₂ =1kg, u₁ =0 and u₂ =6 m/s, then the final velocity will be
3x0 +1x6 = (3+1)v
v = 1.5 m/s
Thus, the clay and steel both have final velocity is 1.5 m/s.
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According to Hooke's law, the force necessary to stretch or compress a spring is proportional to what value?
Answer:
displacement
Explanation:
Hookes Law describes the elastic properties of materials only in the range in which the force and displacement are proportional (displacement = change in length).
If you have a spaceship that can go 20% of the speed of light, how long would it take to travel 200 light-years?
Answer:
1498962290
Explanation:
An electromagnetic wave has a frequency of 6.0 x 1018 Hz. What is the
wavelength of the wave? Use the equation 2 = and the speed of light as 3.0
V
x 108 m/s.
A. 2.0 x 10-26 m
B. 5.0 x 1026 m
C. 2.0 x 1010 m
D. 5.0 x 10-11 m
The wavelength of the wave is 5.0 x 10^-11 m which is option D.
Wavelength calculation.
To get the wavelength (λ) of the electromagnetic wave given we will first link it up with its relationship to its frequency (f) and also to the speed of light (c) given by the formula below.
λ = c/f
Where,
c is 3.0 x 10^8 m/s
f is 6.0 x 10^18 Hz
C/f= 3.0 x 10^8 m/s 6.0 x 10^18 Hz
wavelength = 5.0 x 10^-11 m
so, the wavelength is 5.0 x 10^-11 m.
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Sound travels at about 360 meters/sec. What is the wavelength of sound with a
frequency of 1500 Hz?
Answer:
0.24 m
Explanation:
Given:
Wave velocity ( v ) = 360 m / sec
Frequency ( f ) = 1500 Hz
We have to calculate wavelength ( λ ):
We know:
v = λ / t [ f = 1 / t ]
v = λ f
= > λ = v / f
Putting values here we get:
= > λ = 360 / 1500 m
= > λ = 36 / 150 m
= > λ = 0.24 m
Hence, wavelength of sound is 0.24 m.
what is the formula of effort
Answer:
Hey mate.....
Explanation:
This is ur answer.....
The formula to calculate force is: force = mass x acceleration, or F = m x a, where force and acceleration have both magnitude and direction.
Hope it helps!
Brainliest pls!
Follow me! :)
can someone help me with this??
Answer:
C
Explanation:
Have a nice day :)
7. If a hummingbird hovers 30 cm in front of a window, what will it see?
Answer:
it will see the window???
Which of the following has the most energy?
X-rays
radio waves
ultraviolet radiation
infrared radiation
A 300 kg grand piano is pushed up a 4 meter ramp into the back of a truck using 1200 Newtons of force. The bed of the truck is 1.25 meters off the ground. How efficient is the piano mover that pushed the piano into the truck? (2 sig figs and answer in a percentage)
Answer: KE=0.5*m*v2
Explanation: hope this helps!!!
two charges create 8.00 N of electric force on each other. if you increase their distance to twice its original value, how much electric force do they exert on each other
Answer:
2.00 (right on acellus)
Explanation:
doubling the distance between two charges makes F (8.00) quarter, so you would just do 8.00*1/4
Which four compounds are supersaturated when 60g are dissolved at 90 degrees C?
LOOK AT THE PICTURE BELOW!
Answer:
1 2 3 and thats it
Explanation:
Can you all solve this 2 problems I will mark you as brainlist if you are correct
Answer:
first answer is 70 newtons the second answer is f = 250N
8. What is the total mechanical energy of a penny dropped off of the top of the Empire
State Building if it has a potential energy of 47 J, and a kinetic energy of 23 J?
A.18J
B.24 J
C.70 J
D.667 J
Answer:
C 70 Joules because all of the energy of converted to potential energy.
A spring with constant 559 N/m is 0.14 meters long when not stretched or compressed. You compress the spring until it is 0.07 meters long. How many joules of elastic potential energy are stored in the compressed spring
Answer:
1.46755 Joules
Explanation:
Applying,
E = 1/2ke²......................... Equation 1
Where E = Elastic potential energy of the spring, k = spring constant, e = extension
From the question,
Gieven: k = 559 N/m, e = (0.14-0.07) meters = 0.07 meters
Substitute these values into equation 1
E = 1/2(599×0.07²)
E = 2.9351/2
E = 1.46755 Joules
Which object is NOT a form of chemical energy?
A car has a speed of 20 m/s. If the speed of the car increases to 30 m/s in 5 seconds, what is the car’s acceleration?
2
Explanation:
2 times 5 is 10/ 20+10=30
A simple machine has velocity ratio 3, what did you mean
Answer:
A simple machine having a velocity ratio of 3 simply means that the ratio of the distance moved by effort to the distance moved by load is equal to 3.
Explanation:
A simple machine can be defined as a type of machine with no moving parts but can be used to perform work.
Basically, a simple machine allows for the transformation of energy into work. The six simple machines are;
I. Inclined plane.
II. Screw.
III. Wheel and axle.
IV. Lever.
V. Wedge.
VI. Pulley.
Mathematically, the velocity ratio of a simple machine is given by the formula;
[tex] Velocity \; ratio = \frac {Distance \; moved \; by \; effort}{Distance \; moved \; by \; load} [/tex]
Hence, a simple machine having a velocity ratio of 3 simply means that the ratio of the distance moved by effort to the distance moved by load is equal to 3.
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What happens to molecules when the temperature reaches absolute zero?
They form bonds with other, nearby molecules.
All of their motion stops completely.
They begin to vibrate slowly.
They move so fast that they can't be observed.
2) all of their motion stops completely
Answer:
a their motion stops completely
Explanation:
Hope this helps :)
which of the following statements is a reasonable conclusion about the Arctic ecosystem? a)The number of offspring produced is an abiotic limiting factor because it affects the number of prey that predators can eat. b)The number of predators is an abiotic limiting factor because it affects the number of consumers that can eat producers. c)Temperature is an abiotic limiting factor because it affects the amount of sea ice available for animals to live on. d)Sunlight is an abiotic limiting factor because it affects the number of producers available for other organisms to eat. Please please helpppp!
Answer:
A is the answer
Explanation:
