Answer:
W = 47040 J
Explanation:
Given that,
The mass of a student, m = 60 kg
Height of the tower, h = 80 m
We need to find the work done in climbing the tower. The work done is given by :
W = mgh
So,
W = 60 × 9.8 × 80
W = 47040 J
So, the required work done is 47040 J.
How is the velocity of a wave affected by its frequency, wavelength, and period?
Answer:
I can only explain using the formula
Explanation:
v=f
[tex]v = f \times lamda[/tex]
v is velocity
f is frequency
lamda is wavelength ( I don't have the symbol)
therefore velocity is the product of frequency and wavelength
And since period is the inverse of frequency;
Period (T)=1/f
so we can have v=lamda/T
That's what I think
A screen door spring is stretched
0.299 m, and exerts a 64.7 N force
on the door. What is the spring
constant of the spring?
(Unit = N/m)
Answer:
216.39 N/m
Explanation:
F = 64.7 N
x = 0.299 m
Plug those values into Hooke's Law:
F = kx
64.7 N = k(0.299 m)
---> k = 216.39 N/m
2. A book with a mass of 2 Kg is resting on a shelf 1.5 m off the floor. How much gravitational
potential energy does it have:?
Answer:
Book of mass 2 kg is lifted from floor to the table. The height between floor and the table is 1.5 m. Calculate the work done by gravitational force.
i hope this helps.......
I NEED HELP ASAP
A worker sits at one end of a rod that is 2.80 m long. A weight of 107 N is placed at the other end of the rod. The rod is balanced when the pivot is 0.670 m from the worker.
Answer:
Let the weight of the worker represented by X newton there is a normal force exerted at a distance of 0.67 cm
Explanation:
The weight of the worker which is at a balanced state when the pivot is 0.670 m from it is 447.1 N.
What is Torque?
Torque is a twisting force which speaks to the engine's rotational force and it also measures how much of that twisting force is actually available when an engine exerts itself.
For equilibrium , net torque = 0
Taking clockwise direction positive,
W × (-0.670) + 107N × 2.80 = 0
W × (-0.670) = -299.6
W = -299.6/ -0.670
W = 447.1 N
Therefore, the weight of the worker is 447.1 N.
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Your question is incomplete, most probably the complete question is:
A worker sits at one end of a rod that is 2.80 m long. A weight of 107 N is placed at the other end of the rod. The rod is balanced when the pivot is 0.670 m from the worker. Calculate the weight of the worker.
Two football players run down the field. One has a mass of 70 kg and the other has a mass of 100 kg. Which player will be harder to tackle?
Answer:
The one with larger mass because of the momentum he has.
Explanation:
Momentum= mass x Velocity
As mass increase momentum increase.
PLEASE HELP!!!!
An electron is located 4.22 mm away from an isolated proton. If the distance between the two particles is increased to 8.44 mm, what
happens to the electrical potential energy of the electron and why?
O A. The electrical potential energy will increase because work must be done to separate two particles that attract one another.
B. The electrical potential energy will remain the same because the electron and proton are both fundamental particles and their
charge cannot be changed.
O
C. The electrical potential energy will increase because larger energies are associated with greater distances.
O D. The electrical potential energy will decrease because no work is necessary to increase the distance between particles that
demonstrate attraction.
You can download answer here
tinyurl.com/wpazsebu
If the distance between the two particles is increased to 8.44 mm, the electrical potential energy will increase because work must be done to separate two particles that attract one another. Hence option(A) is correct.
What is potential energy?Potential energy is the energy held by an object as a result of its position relative to other objects, internal stresses, electric charge, or other factors.
The gravitational potential energy of an object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field are all examples of common types of potential energy. The joule, denoted by the symbol J, is the unit of energy in the International System of Units (SI).
The positive and negative charges attract each other, so work must be done to separate two particles. Hence, the electrical potential energy will increase.
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what kind of mirror do u think s used in the side-view mirror of cars?
Answer:
The Convex Mirror is used.
Explanation:
Why are some telescopes placed in space?
There is no gravity in space so bigger, heavier mirrors or lenses can be used
Some types of electromagnetic radiation cannot penetrate Earth's
atmosphere
Space telescopes are less expensive that ground telescopes
Telescopes in space are able to get significantly closer to astronomical
objects
Answer:
to get around the Earth's atmosphere so that we can get a clearer view of the planets, stars, and galaxies that we are studying.
Explanation:
In air, a sound wave with a frequency of 200 Hz has a wavelength of about 1.5 meters. What is the wavelength of a wave if the frequency is increased to 600 Hz?
Answer:
see below
Explanation:
first of all, you find the speed of sound in air
which is
speed = frequency x wavelength
so
speed = 200 x 1.5
speed = 300 m/s
speed remains the same in the same medium
so you can use speed and frequency to find wavelength
speed = frequency x wavelength
300 = 600 x wavelength
wavelength = 0.5 m
hope this helps, please mark it brainliest
In Alaska, salmon feed on tiny plants called phytoplankton. During late summer, salmon gather in rivers to reproduce. Grizzly bears visit these rivers to feed on the large number of salmon. Phytoplankton are . Both the salmon and the grizzly bears are . Grizzly bears are .
Answer:
-->Phytoplankton are AUTOTROPHS
--> Both the Salmon and the grizzly bears are CONSUMERS.
--> Grizzly bears are SECONDARY CONSUMERS.
Explanation:
In an ecosystem, which is the basic functioning unit of nature, the biotic components is made up of all the living organisms in it. These organisms are divided into two main groups which includes:
--> The AUTOTROPHS: These are organisms that are able to use sunlight or chemical energy to manufacture their own food from simple inorganic substances. Since Autotrophs are the only organisms that can produce food in an ecosystem, they are also known as PRIMARY PRODUCERS. Example of autotrophs includes Phytoplankton( all green plants).
-->HETEROTROPHS: These organisms cannot manufacture their own food rather they feed on ready-made food which comes from the tissues of organisms in their environment. In an ecosystem, Heterotrophs are known as the CONSUMERS. Example of Heterotrophs includes all animals (salmon and the grizzly bears).
These biotic components of the ecosystem forms a feeding pathway through which energy and nutrients are transferred step by step among organisms. This is called a FOOD CHAIN. This feeding pathway follows a certain pattern:
--> it begins with a primary producer (Phytoplankton)
--> the primary producer is eaten by a primary consumer (salmon)
--> the primary consumer is eaten by a secondary consumer (grizzly bears)
That is the reason both the Salmon and the grizzly bears are CONSUMERS but while salmon is a primary consumer, grizzly bears are SECONDARY consumers.
Answer:
correct answer below
Explanation:
Describe how we know the plates once formed a supercontinent and how we know this.
*at least 10 sentences*
thank you so much for your help :)
Answer:
How did scientists “discover” Pangea and other supercontinents of the past?Nowadays, they can study the geologic record and use radioactive dating, seismic surveys, and other technologies to construct maps of how the world looked at various points in Earth's history.
If I was floating in space, why would a scale read my weight as "0"?
Answer:
No external contact force.
Explanation:
Mass is defined as the amount of material an object contains, that doesn't change whether the object it on earth, on the moon or anywhere in space. Except the only force that is acting upon the body in gravity and they don't feel gravitational attraction towards the earth.
The work per unit charge required to move a charge between two points in an electric circuit defines electric
A) force
B) Power
C) field strength
D) potential difference
The work per unit charge required to move a charge between two points in an electric circuit electric potential difference. The right option is D) potential difference
What is electric potential difference?Potential difference can be defined as the work done in moving a unit charge from one point to another in an electric field. The S.I unit of potential difference is volts (V).
From the question,
Force: is the product of mass and acceleration Power: This is the rate at which work is done.Field strength: This is the force per unit charge in a field.Potential difference: This is the work done in moving a unit charge from one point to another in a field.Hence, from the above, the right option is D) Potential difference
Learn more about potential difference here: https://brainly.com/question/24220726
What is a scientific model?
Answer:
A scientific model is a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes. Scientists seek to identify and understand patterns in our world by drawing on their scientific knowledge to offer explanations that enable the patterns to be predicted.
Answer:
D
Explanation:
Which of the following are global winds?
O jet streams, trade winds, and Coriolis effect
O jet streams, polar easterlies, and trade winds
jet streams, sea breezes, and trade winds
O jet streams, breezes, and Coriolis effect
The correct and is A or jet streams, trade winds, and Coriolis effect
Answer:
2. Jet streams, Polar Easterlies, and Trade winds
Explanation:
It isn't one because the Coriolis effect is an effect or something that causes something else. (it causes things to curve like other winds and stuff) Not three because Sea breezes are winds that travel short distances, occur at night, at the beach, Not for because it also has Coriolis effect and it also has breezes for some reason. So, your answer will be 2.
Hope this helped!
Stay safe!
A person is listening with his ear against the rail for an oncoming train. When the train is 1.65 km away, how long will it take him to hear the sound of the whistle?
Answer:
Time = 0.317 seconds.
Explanation:
Given the following data;
Distance = 1.65km to meters = 1.65 * 1000 = 1650 meters
We know that the speed of sound in steel is equal to 5200m/s
To find the time to hear the sound of the whistle;
Time = distance/speed
Substituting into the equation, we have
Time = 1650/5200
Time = 0.317 seconds.
Therefore, it will take him 0.317 seconds to hear the sound of the whistle.
A car moving at a constant speed changes direction. Is the car accelerating? How do you know?
Answer:
No
Explanation:
Acceleration is the rate of change in velocity. Here the car maintains a constant speed, no change in velocity
is corona the least dense layer in the sun? please fast
Answer:
the Corona is about 10 million times less dense than sun's surface.this low density makesuch less bright than surface of the sun
Answer:
dude the ans no corona,
Explanation:
It cannot survive in space let alone be one of the layer of the sun due to its high temperature ( that is 2million fahrenheit )
5/100 is the same value as
Answer:
5/100 =120=0.05or 5%
Explanation:
I had this same thing this morning
I'll mark brainliest if you help me. :)
Answer:
gravitational potantional energy
Explanation:
ill try to link a source!
edit: https://flexbooks.ck12.org/cbook/ck-12-middle-school-physical-science-flexbook-2.0/section/14.3/primary/lesson/potential-energy-ms-ps#:~:text=Potential%20energy%20due%20to%20the,is%20called%20gravitational%20potential%20energy.
An unknown element has 5 protons, 5 electrons, and 6 neutrons what is the atomic mass of this element
The atomic mass is the protons + the neutrons.
So your answer would be 5 + 6 = 11.
Please mark Brainliest! :)
HELP MEEEEEEEE PLEASEEEE
A) Compare the difference in the forces of impact for each of two helmets dropped form the same height in figure 2 and explain what this
difference suggests about the amount of time the force is applied to each helmet during the collision. Keep in mind that each helmet has
the same mass and that the crash pads slow down the helmets as they hit. You may use equation Fat mavto support your answer.
B) Explain why the relationship between force and time is important to a helmet designer.
During a collision, a skater will suddenly come to a complete stop. This is a foam of acceleration. A helmet can change the amount of
acceleration and the amount of force that a skater experiences during a collision
C) Compare two helmets in figure 3 and explain how helmet shape changes both the force and the acceleration on a skater's head, as the
skater hits the wall of the rink, using the formula Fema.
BI
SS.
Answer:
B Explain why the relationship between force and time is important to a helmet designer.
During a collision, a skater will suddenly come to a complete stop. This is a foam of acceleration. A helmet can change the amount of
hope you get a good grade
Which statement best explains the difference between greenhouse gases and other atmospheric gases?(1 point)
Greenhouse gases trap thermal energy and reflect the sun’s harmful radiation back to Earth.
Greenhouse gases allow thermal energy to pass through the atmosphere and back out into space.
Greenhouse gases reduce the amount of natural resources on Earth.
Greenhouse gases account for the direction in which water and air move.
Greenhouse gases trap thermal energy and reflect the sun’s harmful radiation back to Earth is the answer
im not 100% sure tho
hope it helps:))
Angela is sitting on a slide. As she is sitting at the top of the slide, Angela has
energy
However, when she begins to go down the slide, she will have
energy
OA. potential; kinetic
OB. kinetic; potential
OC. electrical; chemical
OD. chemical electrical
PLEASE HELP THIS IS TIMED
Answer:
OA. potential; kinetic
Explanation:
A lorry pulls forward after initially being stationary, it takes the lorry 80m to reach a speed of
5m/s, calculate the lorry's acceleration.
Answer:
a=f/m
Explanation:
What is one force listed below which helps to stop the
motion of a sled moving down a snowy hill on its own?
A.) Air Resistance
B.) Applied Force
C.) Gravity
D.) Buoyancy
Answer:
applied force
Explanation:
An applied force is a force that is applied to an object by a person or another object. If a person is pushing a desk across the room, then there is an applied force
3. Suppose a free-fall ride at an amusement park starts at rest and is in free fall.
a. What is the velocity of the ride after 2.3 s?
b. How far do people on the ride fall during the 2.3-s time period?
Answer:
[tex]v = 22.54m/s[/tex] --- Velocity
[tex]h = 25.921m[/tex] --- Distance
Explanation:
Given
[tex]u = 0m/s[/tex] --- Initial velocity
Solving (a): Velocity after 2.3s
To do this, we use the first equation of motion
[tex]v = u + at[/tex]
Where
[tex]t = 2.3s[/tex]
[tex]a = g = 9.8m/s^2[/tex]
So, the equation becomes:
[tex]v = 0 + 9.8 * 2.3[/tex]
[tex]v = 0 + 22.54[/tex]
[tex]v = 22.54m/s[/tex]
Solving (b): Distance covered in 2.3s
We make use of:
[tex]h = ut + \frac{1}{2}gt^2[/tex]
This gives:
[tex]h = 0 * 2.3 + \frac{1}{2}*9.8 * 2.3^2[/tex]
[tex]h = \frac{1}{2}*9.8 * 5.29[/tex]
[tex]h = 25.921m[/tex]
The resistance to the motion of an object is
Answer:
Inertia
Explanation:
Part of Newton's Laws of Motion
Which type of resources do we have a limited supply of?
Explanation:
The resources that we value—time, money, labor, tools, land, and raw materials—exist in limited supply. There are simply never enough resources to meet all our needs and desires.
Explanation:
Time, money, labor, land , and raw materials
Question 8
If you use a force of 48 N to push a box 2 m across the floor, how much work did you do?
Answer:
96 Joules
Explanation:
The formula for work is Fnet times displacement (F x d = w) which, in this case, 48N is the Fnet and 2m as the displacement. Then all we need to do is multiply these two and we get 96 Joules.