Answer:
PE=mgh
Where; m is the mass
g is the gravitational force.
h is the height.
the mass is 1kg, the acceleration due to gravity has a constant value of 10ms² . And the height is 3m.
mgh= 1 x 10 x 3 = 30Joules
write the ways to induce current in a circuit?
The following are the several approaches to produce a current in a coil:
An electric current is induced in a coil when it is rapidly moved between the two poles of a horseshoe magnet.
An electric current is induced when a magnet is shifted relative to a coil.
The current in the coil may be generated by keeping it fixed and rotating a magnet within it.
A steady alteration of the current in 'another coil' kept near it in a coil might create the current...
<3
HEY CAN ANYONE WRITE A POEM BOUT NEON PLS!!!!!!!!
There's a high-voltage pipe full of Neon.
That people try hard not to peon.
Some refrigerant guys
Say it would be wise
To replace all the Neon with Freon.
What effect did the virus have on Frank initially in the movie Osmosis Jones
Answer: But with that germ-ridden egg comes a mortal danger: Osmosis discovers Frank has really contracted a villainous and black-hearted deadly virus known as Thrax who arrives and is plotting to ultimately overheat Frank's body, killing him from the inside out!
If a boy does 150 J of work every 10 seconds that he pulls a wagon, how much power is he producing?
1,500 W
150 W
10 W
15 W
Answer:
15 W
Explanation:
Answer:
15 W
Explanation:
WILL GIVE BRAINLIEST
Instructions: Using what you've learned in this lesson about team building, create your own team-building activity that fosters respect, communication, and commitment within a team. Carry out this exercise with a club you belong to, a study group, a group of friends, or even family members. Video the experience if possible or write a detailed description to hand in to your teacher. Perform an Internet search for "team-building activities" for ideas. Some examples of activities are provided at the link above and there is a description below as a guide. Remember, you should submit either a video or a description, not both.
Answer:
maybe try to gather your family or friends for a board game or like a family olympics with just stuff you find in your house
An air track car with a mass of 5-kg and velocity of 2 m/s to the right collides with a 3-kg car moving to the left with a velocity of 3 m/s. After the collision, the two cars bounce off of each other and the 5-kg car bounces back with a velocity of 1 m/s. What is the new velocity of the 3-kg car after the collision?
Answer: 2 m/s to the right
Explanation:
This is a conservation of momentum question:
p before = p after → m1v1 + m2v2 = m3v3 + m4v4
**Note- if the speed is to the left, plug in a negative v!
5(2) + 3(-3) = 5(-1) + 3(v4) → 1 = -5 + 3v4 → v4 = +2 m/s :)
a person is able to walk 18 miles in 3 hours. what is that person’s speed? show your work.
Answer:
6 mph
Explanation:
18 divided by 3 equals 6. The person walks 6 miles per hour.
prove that f=ma where the symbols have their usual meaning.
Explanation:
According to Newton's second law of motion:
Force is directly proportional to
Change of momentum/time taken
Change of momentum= mv-mu
where m is mass, u is initial velocity and v is final velocity. so,
F∝mv-mu/t
F∝m(v-u)/t
F∝ma (a=v-u/t)
F=kma where k is a constant
In SI units the value of k will become one so the equation will be:
F=ma
On the way down the ball Velocity is ?
A) Positive 9.8
B) Positive
C) zero
D) negative
Answer: A
Explanation: If you drop an object in the absence of air resistance, it accelerates downward at 9.8 m/s2.
Explain how you would figure out ifc=4 is a solution to c + 5 = 13.
Answer:
Simple, plug 4 into c.
4 + 5 = 13
Is this true, no. So therefore c is not equal to 4.
PLEASE HELP ASAP!! I SWEAR I'LL GIVE YOU BRAINLIEST!! (PICTURE IN QUESTION!!)
A. 55 kg
B. 72 kg
C. 48 kg
D. 61 kg
This chart lists four examples of two objects that are in contact.
A 3-column table with 4 rows. The first column has entries Example 1, Example 2, Example 3, Example 4. The second column labeled Object 1 has entries fire, a metal at 80 degrees Celsius, the cool ocean, a tool with a lot of thermal energy. The third column labeled Object 2 has entries air, a metal at 12 degrees Celsius, the warm air, a material with little thermal energy.
Which statement accurately describes the flow of heat in each example?
Heat will flow from Object 1 to Object 2 in examples 2 and 4, and heat will flow from Object 2 to Object 1 in examples 1 and 3.
Heat will flow from Object 1 to Object 2 in examples 1 and 3, and heat will flow from Object 2 to Object 1 in examples 2 and 4.
Heat will flow from Object 1 to Object 2 in Example 3, and heat will flow from Object 2 to Object 1 in examples 1, 2, and 4.
Heat will flow from Object 1 to Object 2 in examples 1, 2, and 4, and heat will flow from Object 2 to Object 1 in Example 3.
Answer:
this is the answer........................
Tim rides at an average speed of 8 mph (mile per hour). How long does it take
for him to ride 44 miles h (show process)
Answer: 5.5 hours
Explanation: 44/8=5.5.
Answer:
5.5 Hours at 8mph to go 44 miles
Explanation:
d=s/t
t=s/d
44/8 = 5.5 time it took 5.5 hours it will take him to ride 44 miles
Choose the word that BEST completes the following sentence:
_________________________ cannot be created or destroyed.
All
Mass
Matter
Galaxies
Stars
Hi there!
Answer:
Matter
Explanation:
To find the correct answer, you have to try all of the answers. Like below:
All cannot be created or destroyed.
This doesn't make sense.
Mass cannot be created or destroyed.
This may sound correct, but when you look at the big picture, this is wrong.
Matter cannot be created or destroyed.
This is correct because it is a saying created long ago and proven with experiments.
Galaxies cannot be created or destroyed.
This is wrong because new galaxies are being created everyday!
Stars cannot be created or destroyed.
This is wrong because like galaxies, new stars are being created everyday!
Susan and Joe push a table 18 meters down a hall by exerting a force of 200
newtons What is the total amount of work done on the table
Answer:
50
Explanation:
If 360 Joules of work are needed to move a crate a distance of 4 meters in 5 sec, what is the power used
Answer:
72watts
Explanation:
360/5
=72watts
Bats, which have a high-calorie diet of insects and face little danger from predators, sleep a lot. In contrast, cows, which have a low-calorie diet and are at risk from
predators, sleep loss. What function of sleep theory do these differences support?
a. Sleep enhances immune function.
b. Sleep repairs and restores.
Oc Sleep conserves and protects.
Od. Sleep enhances learning and memory.
yers
The function of sleep theory supported by the illustration is sleep conserves and protects.
Positive impact of sleep
From the first sentence, bats sleep a lot because they face little danger from predators and as such, they have a high-calorie diet of insects.
Negative impact of sleepFrom the second sentence, cows sleep less, because they face more danger from predators and as such, they have a low-calorie diet of insects.
We can conclude that sleep helps to keep animal safe. Therefore, the correct option will be, "Sleep conserves and protects".
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Annealing is a process by which steel is reheated and then cooled to make it less brittle. Consider the reheat stage for a 100-mm-thick steel plate ( 7830 kg/m3 , F 550 J/kg K, N 48 W/m K), which is initially at a uniform temperature of 7L 200C and is to be heated to a minimum temperature of 550C. Heating is effected in a gas-fired furnace, where products of combustion at 7 800C maintain a convection coefficient of K 250 W/m2 K on both surfaces of the plate. How long should the plate be left in the furnace?
Complete question is;
Annealing is a process by which steel is reheated and then cooled to make it less brittle. Consider the reheat stage for a 100 mm thick plate (ρ = 7830 kg/m³, Cp = 550 J/Kg.K, k = 48 W/m K). The plate initially is at 200 °C and is to be heated to a minimum temperature of 550 °C. Heating is effected in a gas-fired furnace where the products of combustion at T∞ = 800 °C maintain a convection heat transfer coefficient of h = 250 W/m.K on both surfaces of the plate. How long should the plate be left in the furnace?
Answer:
860 seconds
Explanation:
We are given;
Initial Temperature; T_i = 200 °C
Minimum Temperature; T_o = 550 °C
T∞ = 800 °C
convection coefficient; h = 250 W/m².K
ρ = 7830 kg/m³
Cp = 550 J/kg K
k = 48 W/m K
Plate thickness = 100mm
Thus,L = 100/2 = 50mm = 0.05 m
Let's find the biot number from the formula;
Bi = hL/K
Bi = (250 × 0.05)/48
Bi = 0.2604
Now, lowest temperature in the slab is given as;
θ_o = (T_o - T∞)/(T_i - T∞)
θ_o = (550 - 800)/(200 - 800)
θ_o = 0.4167
Now, from online tables calculation, we can find the root of the biot number.
Thus, root of the biot number Bi = 0.2604 is;
ζ1 = 0.488 rad
Also, C1 is gotten as 1.0396
Now,formula for thermal diffusivity is;
α = k/ρc
α = 48/(7830 × 550)
α = 1.115 × 10^(-5) m²/s
Also, from online tables, f(ζ1) = 0.401
Thus, we can find the time the plate should the plate be left in the furnace from;
-(ζ1)²(αt/L²) = In 0.401
-(ζ1)²(αt/L²) = -0.9138
t = (-0.9138 × 0.05²)/-(0.488² × 1.115 × 10^(-5))
t ≈ 860 s
State Newton's Law of cooling
[tex] \\ \\ [/tex]
(⚆﹏⚆) xD
Answer:
the rate at which an object cools is proportional to the difference in temperature between the object and the object's surroundings.
To state Newton's Law of cooling we say "According to Newton's law of cooling, the speed at which an item cools is proportional to the temperature differential between the object and its surroundings.".
What is Newton's Law of cooling?Generally, According to Newton's law of cooling, the speed at which an item cools is proportional to the temperature differential between the object and its surroundings.
In conclusion, Newton's Law of cooling applies to the temperature interaction of an object and its environment.
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There are 2 cars that are getting ready to race. After sitting at a stoplight for 30 seconds, the light turns green and they begin to accelerate at a rate of 4m/s2. The cars were neck and neck the whole way after traveling 150 meters. How long did it take them to travel that 150 meters?
Answer:
75secondsExplanation:
Given that the acceleration of the car is
a=4m/s^2
and also the distance covered is
d=150m
from the problem "The cars were neck and neck the whole way after traveling 150 meters"
this means velocity was constant throughout
s=ut+1/2at
150=0*t+4t/2
150=2t
divide both sides by 2
t=150/2
t=75seconds
A wave traveling at 280 m/s has a wavelength of 5.2 meters. The frequency of this wave is CHOOSE ANSWER
.
This question involves the concepts of wave speed, wavelength, and frequency.
The frequency of the wave will be "53.85 Hz".
FREQUENCYThe relationship between speed, wavelength, and frequency of the wave can be given by the following formula:
[tex]v=f\lambda\\\\f =\frac{v}{\lambda}[/tex]
where,
λ = wavelength = 5.2 mv = wave speed = 280 m/sf = frequency = ?Therefore,
[tex]f=\frac{280\ m/s}{5.2\ m}\\\\[/tex]
f = 53.85 Hz
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In a novel from 1866 the author describes a spaceship that is blasted out of a cannon with a speed of about 11.000 m/s. The spaceship is approximately 274 m long but part of it is packed with gunpowder, so it accelerates over a distance of only 213 m. What was the acceleration (in m/s2) experienced by the occupants of the spaceship during the launch?
Answer:
[tex]a=0.284\ m/s^2[/tex]
Explanation:
Given that,
Initially, the spaceship was at rest, u = 0
Final velocity of the spaceship, v = 11 m/s
Distance accelerated by the spaceship, d = 213 m
We need to find the acceleration experienced by the occupants of the spaceship during the launch. It is a concept based on the equation of kinematics. Using the third equation of motion to find acceleration.
[tex]v^2-u^2=2ad\\\\a=\dfrac{v^2-u^2}{2d}\\\\a=\dfrac{(11)^2-(0)^2}{2\times 213}\\\\a=0.284\ m/s^2[/tex]
So, the acceleration experienced by the occupants of the spaceship is [tex]0.284\ m/s^2[/tex].
It takes 77.4 N to push a 43.8 kg
crate at a constant speed across
flat ground. What is the
coefficient of kinetic friction?
(No unit)
Answer:
0.180
Explanation:
(Applied Force) / (Weight) = Coefficient of kinetic friction
(77.4 N) / (43.8 kg * 9.81 m/s/s) = 0.180
.180 is indeed the correct answer for acellus
A block of weight 5000 N is pushed up a slope by a force of 250 N. Assume there is no friction. Calculate:
a) the actual mechanical advantage
b) the velocity ratio
c) the length of the slope if the height of the slope is 10 m
The actual mechanical advantage, the velocity ratio, and the length of the slope if the height of the slope is mathematically given as
A=20VR=0.05x=20mWhat are the actual mechanical advantage, the velocity ratio, and the length of the slope if the height of the slope is 10 m?Question Parameters:
A block of weight 5000 N is pushed up a slope by a force of 250 N.
Generally, the equation for the actual mechanical advantage is mathematically given as
A=Fout/Fin
A=5000/250
A=20
b)
the velocity ratio is given by the distance moved by the effort divided by the distance moved by the load
Therefore
VR=250/5000
VR=0.05
c)
the length of the slope if the height of the slope is 10 m
Assume the slope is at an angle of 30
Hence
sin 30=10/x
x=20m
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Answer:
A) as you know AMA is equal to VR so the solution is 5000N/250N which is equal to 0.05with no units
what is simpal machine?
Answer:
Simple machine is a machine that is simple and can be used anywhere.
Explanation:
hope this help.
folow me in the brainly yes.
Which statement describes dynamic equilibrium?
Answer:An object has balanced forces acting on it and constant velocity.
Explanation:
Suppose you are spinning a child around in a circle by her arms. The
radius of her orbit around you is 2 meter. Her speed is 5 m/s. Her mass
is 20 kg. What is the magnitude and direction of tension in her arms?
Answer: 25
Explanation ;)
Hello people ~
1 hertz is equal to
(a) 1 vibration per minute
(b) 10 vibrations per minute
(c) 60 vibrations per minute
(d) 600 vibrations per minute
60vibrations per minute
Usually 1 hertz equals to 1 vibration per second
1 min=60sTotal vibration=60
So option C is correct
1.What is light?
2.How light is being measured?
3.How light is being produced naturally and artificially?
4.How light is being detected?
5.What is the difference between light and ambient?
6.What are the modes of light sensors? Explain each.
Answer:
1. light is electromagnetic radiation within the portion of electromagnetic spectrum that is perceived by the human eye.
2. it's measured in footcandles or lux- it is the amount of light (lumens) falling on a Surface (over any given square foot or square meter). therefore, light intensity is measured in terms of lumens per square foot (footcandles) or lumens per square meter (lux).
3. natural light,, which produces heat and color comes from the radiation given off by the sun. It is then filtered through the Earth's atmosphere and absorbed by plants. Artificial light sources can consist of a filament that uses electricity or halogen gas to go or an electronic device that emits light.
4. most of our conscious vision stem from photoreceptors in the retina, the light-sensitive layer at the back of our eyeball. In animals with backbones (vertebrates) cells that detect light for vision are vaguely shaped like rods or cones giving them their familiar names.
5. there is a difference between ambient and task lighting. task lighting provides focus light so you can see better perform a certain task. while ambient fixtures offer general lighting for your home, distribute light evenly as well as helps create a mood.
6. what are the types of light sensors
• photoresistors (LDR)
• photodiode (how they look like)
• phototransistors
Explanation:
I hope this helped, I'm so sorry if it didn't .
Benny has 20 jellybeans and wants to share with his friends how many will each friend get? there are 5 friends.
Answer each friend will get 3.33333 repeating if he is included. if only his friends are getting them then each one gets 4
Explanation:
devide 20/6 and 20/5 respectively.
Answer:
Yes ma’am I’m not doing it ok I’m sorry I didn’t mean to kitty you didn’t know that I was just trying to kitty kitty mama mama daddy mama mama I don’t wanna talk about it anymore I’m not gonna be mad I just got kicked out of the house I just woke me down and I’m sorry for the time you got snap I just got kicked out of the house I just woke me a text
Explanation: