Answer:
B
Explanation:
Answer:
B
Explanation:
I had a feeling
Calculate the average speed of a runner who runs for 500 meters in 40 second HELP!
Answer:
12.5
Explanation:
500 divided by 40 = 12.5
Two ice-skaters are skating in circles on a frozen pond. Maria is making large circles with a radius of 12 m and skating 4.5 m/s. Her friend, Samantha, is making smaller circles with a radius of 6 m but is not skating as quickly, going only 3.8 m/s.
How could each skater increase her centripetal acceleration without changing the size of her path? Explain your reasoning.
Answer: Samantha has the largest centripetal acceleration of 2.4 m/s^2. Maria has only 1.69 m/s^2.
Explanation:
Why can humans float in space but not on Earth?
A warehouse worker pushed a cart weighing 4.50 kg to the top of an inclined plane. Initially, the cart was 0.670 m above the floor. If the top of the inclined plane is 2.70 m above the floor, calculate the work done by gravity as the worker pushed the cart to the top of the plane.
Answer:
- 89.523J
Explanation:
We solve the above question using work done(Potential Energy) formula
The formula =
-(mgh)
Where m = Mass = 4.50J
g = Acceleration due to gravity = 9.8m/s²
We are told in the question:
Initially, the cart was 0.670 m above the floor. If the top of the inclined plane is 2.70 m above the floor
Hence, the height =
2.70m - 0.670m = 2.03m
Work done = -(2.03m × 4.5kg× 9.8m/s²)
= - 89.523J
Margaret wants to go for a swim, and decides to jump in using the diving board that measures 3-m long.
She initially leaps with a velocity of 8.0 m/s at an angle of 80° to the horizontal.
What are the horizontal and vertical components of her velocity?
please help if you can!
Answer:
The horizontal component of her velocity is approximately 1.389 m/s
The vertical component of her velocity is approximately 7.878 m/s
Explanation:
The given question parameters are;
The initial velocity with which Margaret leaps, v = 8.0 m/s
The angle to the horizontal with which she jumps, θ = 80° to the horizontal
The horizontal component of her velocity, vₓ = v × cos(θ)
∴ vₓ = 8.0 × cos(80°) ≈ 1.389
The horizontal component of her velocity, vₓ ≈ 1.389 m/s
The vertical component of her velocity, [tex]v_y[/tex] = v × sin(θ)
∴ [tex]v_y[/tex] = 8.0 × sin(80°) ≈ 7.878
The vertical component of her velocity, [tex]v_y[/tex] ≈ 7.878 m/s.
URGENT!!!
Calculate the frequency of violet light if the wavelength in air is 430nm.
* speed.of violet light in the prism = 2×10^8 m/s
* 1nm = 10^-9
* velocity of light in air = 3×10^8 m/s
Answer:
[tex]f=6.97\times 10^{14}\ Hz[/tex]
Explanation:
Given that,
Wavelength, [tex]\lambda=430\ nm=430\times 10^{-9}\ m[/tex]
We need to find the frequency of the violet light.
We know that the relation between frequency and wavelength is given by :
[tex]f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{430\times 10^{-9}}\\\\f=6.97\times 10^{14}\ Hz[/tex]
So, the frequency of violet light is [tex]6.97\times 10^{14}\ Hz[/tex].
Which shows the use of a fulcrum? Choose all that apply.
Choose all answers that are correct.
Question options:
Hands opening a bottle with bottle opener
Man moving rock with a lever
Boy using an ax to cut wood in forest
Answer:
Hands opening a bottle with bottle opener
PLEASE HELP ASAP 2. Two rocks with a mass of 5 kilograms and 10 kilograms, respectively, fall freely from rest near
the Earth's surface. After 3 seconds of free-fall, compared to the 5-kg rock, the 10-kg rock has
greater...
a. acceleration
b. momentum
c. height
d. velocity
e displacement
Answer:
i Think momentum
Explanation:
what ocean features occur along areas of volcanic activity in the ocean floor and release high pressure, extremely hot water and chemicals?
Mid-ocean ridges
Continental shelfs
Hydrothermal vents
Trenches
Answer:
Hydrothermal vents
Explanation:
the velocity of a body of mass 60kg reaches 15m/s from 0m/s in 12 second. calculate the kinetic energy and power of the body.
Answer:
KE=1/2m v^2
1/2*60*15*15
30*15*15
6750 joules
power=work/time
Question 4 of 10
Which option is a good blackbody radiator?
O A. A lightbulb
O B. A balloon
O C. A person
O D. A mirror
SUBM
Answer:
A lightbulb
Explanation:
Answer:
Lightbulb
Explanation: got it right
A chain has a mass of 10.0 kg. It is hanging freely, at rest, with one end connected to a ceiling hook.
What is the tension at the top of the chain?
What is the tension at the midpoint of the chain?
What is the tension at the bottom of the chain?
Answer:
Identify the object to be analyzed. For some systems in equilibrium, it may be necessary to consider more than one object. Identify all forces acting on the object. Identify the questions you need to answer. Identify the information given in the problem. In realistic problems, some key information may be implicit in the situation rather than provided explicitly.
Explanation:
Identify the object to be analyzed. For some systems in equilibrium, it may be necessary to consider more than one object. Identify all forces acting on the object. Identify the questions you need to answer. Identify the information given in the problem. In realistic problems, some key information may be implicit in the situation rather than provided explicitly.
Please do all of i will give you brainlest and thanks to best answer plz do it right
Answer:
winter solstice i think
Explanation:
Answer:
a/ solar eclipse
Explanation:
because the moon is on the left side of earth
What are compounds considered to be
Answer:A compound is a substance formed when two or more elements are chemically joined.
Explation:Water, salt, and sugar are examples of compounds.
I hope this helps<3
how is an echo like a reflection?
Answer:
Echoes. An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.
Explanation:
A 0.050 kg ball starts from rest at some unknown height on a toy roller coaster.
At a later time, it travels through the top of a loop at 2 m/s and a height of 0.40 m.
Since this track is frictionless, what was the starting height of the ball?
Answer:
The starting height of the ball is approximately 0.604 m
Explanation:
The given parameters are;
The mass of the the ball = 0.050
The speed with which it travels through the top loop = 2 m/s
The given height at which the ball moves at 2 m/s = 0.40 m
Therefore, we have;
1/2·m·v² = m·g·h
1/2·v² = g·h
h = 1/2·v²/g = 1/2 × 2²/9.81 ≈ 0.204
The additional height = h = 0.204 m
Therefore;
The starting height of the ball ≈ The given height at which the ball moves at 2 m/s + h
The starting height of the ball ≈ 0.40 + 0.204 = 0.604 m
The starting height of the ball ≈ 0.604 m.
When any object in rest, then potential energy is present. But when object is in motion then object have kinetic energy.
Starting height of the ball is 0.604 m.
We know that, when any object is start from rest, then potential energy is converted into kinetic energy.
[tex]\frac{1}{2}mv^{2} =mgh[/tex]
Where m is mass of object, g is gravitational acceleration , h is height and v is velocity of object. (value of g = 9.81 m/ second square)
from above equation,
we get, extra height [tex]h=\frac{v^{2} }{2g} \\\\h=\frac{4}{2*9.81}\\\\h=0.204[/tex] meter
The starting height of the ball will be sum of the height at which ball moves 2 m/s and extra height.
Starting height = 0.40 + 0.204 = 0.604 meter.
Learn more:
https://brainly.com/question/18963960
What two processes are part of electromagnetism? A. The production of a magnetic field by an electric current B. The production of a magnetic field by permanent magnets C. The attraction of electric charges for each other D. The production of an electric current by a moving magnet
Two processes, the magnetic field production by electric current and electric current production by moving magnets are part of Electromagnetism.
Electromagnetism:
It is a branch of physics in which scientists study the electromagnetic force. Or in simple words studies the interaction of electric and magnetic field.
This includes the production of magnetic field from the electric current and electric current from moving magnet.
The study of magnetic field of a permanent magnet is part of magnetism while the attraction of electric charges by each other is studied under electrostatics.
Therefore, two processes, the magnetic field production by electric current and electric current production by moving magnets are part of Electromagnetism.
To know more about Electromagnetism:
https://brainly.com/question/13803241
a car travels west at 40 km/h
a man on a bike travels at 10 km/h
what is the speed of the car relative to the speed of the bicycle ?
Answer:
The car is going 0 km/h more than the bike
Explanation:
I mon runs a distance of 10km in 5 ms
he overage speed
Note: Your question inputs seem a little odd. But, I am assuming that you really mean '10km in 5 ms'.
Answer:
The Average speed = 15000 / 0.005 = 3000000 m/s
Explanation:
Average speed can be calculated by dividing the total distance covered by the total time.
Average speed = Total Distance / Total time
Given
Total distance = 15km = 15(1000) = 15000 m Total time = 5 ms = 0.005 seconds
Thus,
Average speed = Total Distance / Total time
Average speed = 15000 / 0.005 = 3000000 m/s
A marble is given potential energy by being placed by a location w. When the marble is released it rolls down the track at which location dose the marble have maximum kinetic energy w x or y or z
Answer:
The answer is "Location Y"
Explanation:
Please find the complete question in the attachment.
As we show in the graph when the marble rolling with the full force it will stop on the y location because it is curved, and the marble can't move to another location, that's why the maximum kinetic energy of the marble is at the y location.
How does eclipses occur
Answer:
When Earth passes directly between the sun and the moon, a lunar eclipse takes place. During a solar eclipse, the moon casts two shadows. One is called the umbra; the other is called the penumbra. An eclipse takes place when Earth or the moon passes through a shadow.
if the volume of a cube is 100cm3. what's the measurement of one of its length
Answer:
100 cm
Explanation:
Answer:
4.64
Explanation:
The cube root of 100 is 4.64.
Which pair of elements will form a covalent bond?
A. Aluminum and chlorine
B. Iithium and oxygen
C. Potassium and chlorine
D. Carbon and sulfur
Answer:
Aluminium and chlorine
Explanation:
STOP WHAT UR DOING!!! TAKE A MOMENT TO THINK ABOUT THESE!!
Cops pulling you over for speeding is like the adult version of teachers telling you not to run in the hallways.
Nothing makes sense, pizzas are round, the boxes we put them in are square and we eat them as triangles.
Some Scooby Doo episodes would be a lot shorter if they just went to the costume store first and asked a couple of questions.
I wonder if my cat thinks the delivery guy is my owner because he gives me food.
enjoy!!
Answer:
lol
can i have brainllest
Explanation:
Think of this how can a camera have a circler lens but take rectangular photos
In how many ways can chemical reaction takes place? what are they?
Answer:
Chemists classify chemical reactions in a number of ways: by type of product, by types of reactants, by reaction outcome, and by reaction mechanism. Often a given reaction can be placed in two or even three categories, including gas-forming and precipitation reactions.
Explanation:
mark me as brainliest thank you
Jenny puts a book on her desk. Jenny’s book has an area of 200 cm2.It exerts a pressure of 0.05 N/cm2 on the desk. What is the weight of the book? *
Coretta feels confident in her abilities, and she frequently makes contributions to her local community. Based on this information, what can you assume is true about Coretta?
A She has good emotional health.
B She makes self-esteem a priority.
C She recently improved her mental health.
D She exercises at least twice a day.
Answer:
A She has good emotional health.
Explanation:
If you are test-driving a Bugatti Veyron and you go from 0 m/s to 124 m/s in 3.7 seconds, what was your acceleration?
Answer:
initial velocity (u) = 0 m/s
Final velocity (v) =124 m/s
Time (t) = 3.7 s
acceleration (a) =?
Now
A =V-U /T
= 124-0 /3.7
= 33.51 m/s^2
Where is the deepest cave in the world? How far down is it located?
i need help asap please help fast
Answer:
Geology Notes
1 Veryovkina Cave 2212[1] 13.5 km (8.4 mi)[1] Abkhazia / Georgia 43°23′52″N 40°21′37″E.
Integrated Science- 8th grade science
Please Help ASAP!
Its almost the end of semester And I need to fix my grade for science so PLEASE help!
its almost report cards time!
Answer:
I do believe it is A.
Explanation:
I hope this helps :)
Answer:I believe it is A
Explanation: B just doesn't seem like something an 8th grader would be learning about, and I'm not sure about the other ones.