Answer:
s = 46.67 km/h
Explanation:
s = d/t
s = 70/1.5
An object is dropped from a tower 128 m high. a. What is the speed of the object that falls freely from rest for a distance of 128 m?
The speed of the object falling freely from rest for the given distance is 50.09m/s.
Given the data in the question:
Hight of tower; [tex]h = 128m[/tex]Since object is initially at rest, initial velocity; [tex]u = 0[/tex]Free Fall Motion
A free fall is simply any motion of a body where gravity is the sole influence.
From the third equation of motion;
[tex]v^2 = u^2 + 2gh[/tex]
Where v is final velocity, u is initial velocity, h is height and g is acceleration due to gravity ( [tex]g = 9.8m/s^2[/tex] ).
To determine the speed of the falling object, we input our values into the expression.
[tex]v^2 = u^2 + 2gh\\\\v^2 = (0)^2 + [ 2 * 9.8m/s^2 * 128m ]\\\\v^2 = 2 * 9.8m/s^2 * 128m\\\\v^2 = 2508.8m^2/s^2\\\\v = \sqrt{2508.8m^2/s^2} \\\\v = 50.09m/s[/tex]
Therefore, the speed of the object falling freely from rest for the given distance is 50.09m/s.
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A catapult is a device that throws heavy stones. The stone sits in a basket at the end of an arm. The arm moves fast, and the stone is launched toward the target. What type of force does the catapult apply to the stone
Elastic force is the type of force which the catapult applies to the stone.
What is a Catapult?This is a launching device which is composed of rubber and used in the study of projectile motion.
The type of force present in a rubber is elastic force which is applied as a result of pressure on it when the individual launches the stone towards the required target.
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The catapult applies elastic force to the stone which is converted to kinetic energy of the flying stone.
What Elastic potential energy?Elastic potential energy is the type of energy that is stored in an elastic material.
The catapult is an elastic material that converts elastic energy into kinetic energy of flying stone.
Thus, the catapult applies elastic force to the stone which is converted to kinetic energy of the flying stone.
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PLEASE HELP THE TEST IS DUE AT 11:59PM
24 p and 25 e is a negative atom because it has one electron and became
Answer:
and became negativity charged
Explanation:
this is because it has an extra electron and does not maintain extet or duplet structure
how long did it take the flag to rotate once in a full circle
Answer:
360 degrees is one full rotation starting at zero
it take 2 s to the flag to rotate once in a full circle with 3 rad/s of angular velocity.
What is Angular velocity and acceleration ?Angular velocity is "rate of change of angular displacement with respect to time". i.e. ω= dθ/dt. it is also defined as angular displacement over time. i.e. ω = angular displacement/Time.
Angular velocity shows how much angle can be covered in unit time. It's SI unit rad/s.
Angular acceleration is rate of change of Angular velocity with respect to time.
i.e. α = dω/dt if an object changes its angular velocity in short time, we can say that it has greater angular acceleration. It is expressed in rad/s².
In this problem we have to calculate time, but the angular velocity id not given.
Consider the angular velocity is 3 rad/s.
Given,
Angular displacement θ = 2π
angular velocity ω = 3 rad/s
Time t = ?
Time = θ/ω
Time = 2π/3 rad/s = 2 s
Hence the answer is 2s.
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#SPJ2.
Which plant tissue makes up the thinnest layer?
Answer: Epidermis tissue.
Explanation: Layer of cells covering surface of entire plant, what it does is Acts as a barrier to fungi and other microorganisms and pathogens. the thin layer because it Allow for light to pass through, thereby allowing for photosynthesis in the tissues below
A copper vessel contains 200 gram of water at 24°C. 112 gram of water at 42° C is added, the resultant temperature of water is 30°C. Calculate the thermal capacity of the calorimeter.
The heat capacity depends is the heat absorbed by the calorimeter as
the temperature changes.
Response:
The thermal capacity of the calorimeter is 100.416 J·K⁻¹What the thermal capacity and how can it be calculated?Mass of the vessel. m₁ = 200 gram
Temperature of the water, T₁ = 24°C
Mass of the warm water, m₂ = 112 grams
Temperature of the warm water, T₂ = 42°C
Resultant temperature of the water, T₃ = 30°C
The heat capacity of the water = 4.184 J·Kg⁻¹·K⁻¹
Heat lost by the warm water = Heat gained by the cold water + The heat gained by the calorimeterLet C represent the thermal capacity of the calorimeter
We have;
Change in heat, ΔH = m·c·ΔT
Therefore;
112 × 4.184 × (42 - 30) = 200 × 4.184 × (30 - 24) + C×(30 - 24)
5623.296 = 5020.8 + 6·C
6·C = 5623.296 - 5020.8 = 602.496
[tex]The \ heat \ capacity \ of \ the \ calorimeter, \ C = \dfrac{602.496}{6} = \mathbf{ 100.416}[/tex]
The thermal capacity of the calorimeter, C = 100.416 J·K⁻¹Learn more about heat capacity of a substance here:
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Please help
How would u define energy
Energy is being produced in two different ways.
1st. when you run, exercise, etc allot of energy is being produced from your body in form of heat.
2nd. energy which is in form of coal, electricity, gas etc.
Definition: the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another.
hope this helps you
have a great day :)
Which group of objects refract light energy?
A.Shiny object, glasses and mirror
B.glasses, prism, and passing through water
C.Glasses, prism and mirror
D.Mirror, glasses, and passing through water
Answer:
B. glasses, prism, and passing through water
Explanation:
Mirrors reflect, not refract.Glasses, water and prism refract.*Note:- When light is bounced back it is called reflection.
[tex]\red{ \rule{35pt}{2pt}} \orange{ \rule{35pt}{2pt}} \color{yellow}{ \rule{35pt} {2pt}} \green{ \rule{35pt} {2pt}} \blue{ \rule{35pt} {2pt}} \purple{ \rule{35pt} {2pt}}[/tex]
Answer⤵️Which group of objects refract light energy?
B.glasses, prism, and passing through waterA car travels 50 km in 10 hr. What was the average speed of the car?
Answer:
5km
Explanation:
Just helping
If 50km divided by 10hrs =5
Sorry if I'm wrong but that's what I got
What are the advantages of ring system wiring?
Answer:
The two most common advantages of the ring system are as follows:
- Voltage drop across the circuit is less or negligible when compared with the tree system.
- More appliances can be connected across the circuits as the supply is radially distributed across the space
We have that the advantages of ring system wiring is given as
Voltage drop across the circuit very smallMore load space is available as the supply point is distributed across the circuitRing Wiring
Question Parameters:
Generally, A ring system wiring is wiring method where we see the sockets and distribution outlets to be connected in a ring-like manner.
We have that its advantage are
Voltage drop across the circuit very smallMore load space is available as the supply point is distributed across the circuitFor more information on Electricity visit
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The atmospheric pressure is 1atm what does it mean?
Answer:
A unit of pressure equal to the air pressure at sea levels is called 1atm. • 1atm = 760mmHg at 0°Celsius under the standard gravitational force or you can say standard gravity. • 1atm is also equal to 14.7 pounds per sq. Inch ( 1.01325 × 105 pascals )
Explanation:
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When greater pressure is applied to the accelerator to increase speed to pass someone or merge it is called _________ acceleration.
Thrust acceleration is the application of great pressure to the accelerator to increase speed.
Thrust acceleration
Thrust accelerationGenerally,greater pressure is applied to the accelerator it is obvious that the driver of the system is making an attempt to increase speed of the system for a specific time frame
Therefore, when greater pressure is applied to the accelerator to increase speed it is refereed to as thrust acceleration.
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On a fake planet, you find that on a certain day at noon no shadow is cast. At the same time your friend sees a shadow due to the Sun being 12 degrees away from the Zenith. Knowing the distance between you and your friend is 500 km, what is the circumference of this fake planet
Answer:
In 250 BC, Eratosthenes measured the circumference to be about 24,500 miles:
by this method, 12 deg = 12 / 360 = 1/30 of the planet's surface\
30 * 500 km = 15,000 km in circumference, about 9,200 miles
Two carts collide and bounce apart. Cart 1 had a momentum of –6 kg • m/s before the collision. Cart 2 had a momentum of 10 kg • m/s before the collision.
What is the total momentum of the carts after the collision?
–16 kg • m/s
–10 kg • m/s
4 kg • m/s
10 kg • m/s
Answer:
4 kg m/s
Explanation:
When finding momentum after a collision, you can just add the momentums together, this would be 10 kgm/s -6 kgm/s to get 4 kgm/s
The total momentum of the carts after the collision is 4 kgm/s.
What is momentum?The momentum of an object is the product of mass and velocity of the object.
P = mv
Total momentum of the cartsThe total momentum of the carts is calculated as follows;
P = P₁ + P₂
P = -6 + 10
P = 4 kgm/s
Thus, the total momentum of the carts after the collision is 4 kgm/s.
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A proton is accelerated to one-tenth the velocity of light, and this velocity can be measured with a precision of 1%. What is the uncertainty in the position of this proton
The uncertainty in the position of the proton is 1.1 x 10⁻¹³ m.
Velocity of the protonThe velocity of the proton is calculated as follows;
[tex]v = \frac{1}{10} \times 3\times 10^8 \ m/s = 3 \times 10^7 \ m/s[/tex]
precision of the velocity, Δv = 0.01 x 3 x 10⁷ = 3 x 10⁵ m/s
Uncertainty in the position of the protonThe uncertainty in the position of the proton is calculated as follows;
[tex]\Delta xm\Delta v= \frac{h}{4\pi} \\\\\Delta x = \frac{h}{4\pi m\Delta v} \\\\\Delta x = \frac{6.67 \times 10^{-34} }{4\pi \times 1.67 \times 10^{-27} \times 3\times 10^5} \\\\\Delta x = 1.1 \times 10^{-13} \ m[/tex]
Thus, the uncertainty in the position of the proton is 1.1 x 10⁻¹³ m.
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Find the number of electrons in the subshell with azimuthal quantum number l=2
Answer:
23 electrons
Explanation:
i just know because im a god
If the mass of the cement is 15 000 kg, calculate the density of this cement sample in kgm-3
Explanation:
Hi there!
Mass of the container (m) = 15000 kg
Also from the figure;
Volume of the container (V) = l*b*h
{ From figure length = 2m , breadth = 1.1m, height = 2.5m}
So,
V = (2*1.1*2.5) m³
= 5.5m³
Then;
Density (d) = m/v
= 15000/5.5
= 2727.27 kgm³
Therefore, the density is 2727.27 kgm³.
Hope it helps!
The energy of an electromagnetic wave is related to its amplitude.
Answer:
True
Explanation:
The energy carried by a wave is proportional to its amplitude squared. The larger the strength of the electric and magnetic fields, the more work they can do and the greater the energy the electromagnetic wave carries. A wave's energy is proportional to its amplitude squared (E2 or B2).
5. An object placed 3m from a plane mirror is shifted by 1 m away from the mirror. What is the distance between the object and its image?
Answer:
distance of object from mirror=distance of image from mirror
so distance between object and image=distance of object from mirror+distance of image from mirror
=2 x distance of object from mirror
=2 x (3+0.4)m
=2 x (3.4)m
=6.8 m
Explanation:
hope this helps :)
How much force is needed to accelerate an object of mass 90 kg at a rate of 1.2 m/s2?
0.013 N
75 N
108 N
1080 N
Answer:
108 N
Explanation:
F = ma
F = (90kg)(1.2m/s^2)
F = 108 N
Derive P=4T/R from fluid mechanics
To Find: Diameter of soap bubble =? Solution: By Laplace's law of spherical membrane for a bubble. (Pi– Po) = 4T / r.
Which two personality traits are categorized as Energy, which shows where your mental energy is typically directed?
The personality traits extraversion and openness are are categorized as Energy because their mental energy is typically directed action and creativity.
What are personality traits?Personality traits refers to characters and attitudes that describes an individual.
Many researchers believe there are five key personality traits:
extraversionagreeableness,openness,conscientiousness, andneuroticism.The personality traits extraversion and openness are are categorized as Energy because their mental energy is typically directed action and creativity.
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What would cause a beam of light to increase in wavelength and bend away from the normal? A) Passing from a round glass into a square glass B) Passing from air into glass C) Passing from a water faucet into a bathtub of water D) Passing from glass into air brainly
Answer:
i think it A sorry if i get it wrong but it should be A
Explanation:
What behavior of light is evidence for a wave model of light.
Explanation:
the intersection behavior
Please help me. I have to submit this today.
Explain how the writing on the arm let, specified in paragraph 4, contributes to the development of the story. The story “The Water Of Life”
Answer:
Answer:
This week in class, we’re reading "The Water of Life" by Howard Pyle.
In Howard Pyle’s “The Water of Life”, a king abuses his power by asking a faithful servant to complete difficult tasks for him, hoping to win the love of a princess.
As we read, we will be discussing the themes of Morality, Power & Greed, and Resilience & Success as they relate to the text. We are trying to answer these big questions :
"What is good and how do we know?", "Why do people succeed?", and "How does power corrupt?"
Explanation:
Answer:
Explanation:
It is not exactly a physics question...
The story "The Water Of Life" is about a king and his faithful servant.
The servant worn an armlet on his arm.
The following words were written on the armlet: Who thinks to wear me on an arm, must lack both guile and thought of harm."
That writing further develops the story as it reflects on the king's sending his servant to help a princess who was upset after her bird died. The story's theme is about power, greed and resilience.
if kinetic energy of a body of mass 10 kg is 2000 J find velocity
Answer:
I guess answer is 10m/s.
Explanation:
Kinetic Energy=1/2 mv^2
or,2000J=1/2×10kg×v^2
or2000J=5kg.v^2
or,2000J/5kg=v^2
or,100J/kg=v^2
or,v=10m/s
The diagram below shows a boat moving north in a river at 3m/s while the current in the river moves south at 1 m/s.
How will the boat be affected if it enters a part of the river where the current is moving south at 4 m/s?
Answer it will move slower:
Explanation: cause the force that’s opposite of it
Se dispara un proyectil con una velocidad de 50 m/s con un Angulo de 37° respecto a la horizontal. Calcular después de que tiempo se encontrará a 25m de la superficie por segunda vez
La posición vertical del proyectil es:
y = 50 m/s sen37° - 1/2 . 10 m/s² t²; sen37° ≈ 0,6
Omito las unidades:
y = 30 t - 5 t²;
Según el enunciado es y = 25
Luego 25 = 30 t - 5 t²; o bien t² - 6 t + 5 = 0
Es una ecuación de segundo grado en t, que resuelvo directamente:
t = 1 s, t = 5 s
Pasa por primera vez en 1 s (subiendo)
Pasa por segunda vez en 5 s (bajando)
[tex]\qquad \qquad\huge \underline{\boxed{\sf question}}[/tex]
How do you find the coordinates of centre of mass of multiple particle system ?
By dividing the moments around the y-axis and around the x-axis,
respectively, by the total mass, the x- and y-coordinates of the centre of
mass may be determined.
formula's:
[tex]y.cm=\left[\begin{array}{ccc}\frac{m1y1+m2y2+...}{m1+m2+...}\end{array}\right][/tex][tex]x.cm=\left[\begin{array}{ccc}\frac{m1x1+m2x2+....}{m1+m2+.....}\end{array}\right][/tex]centre of two mass particle system: [tex]\left[\begin{array}{ccc}(m1+m2) r.cm =(m1 )r1+(m2) r2\end{array}\right][/tex]