Answer:
Explanation:
Since the bell is at rest in an elevated position, we can assume that it only has potential energy.
U=mgh is the formula for potential energy where U=potential energy, m= mass, g=acceleration due to gravity, and h=height.
Plug in known variables....
U=200kg*9.8m/s^2*45m
U=88200 joules of potential energy or letter D.
Bill and Nageen have each built an electric motor and they are testing them by having them lift boxes. Bill's motor lifts a box 0.39 metres in 2 seconds. Nageen's motor lifts the same box 0.35 metres in 2 seconds. Whose motor has applied more power to the box?
Answer:
Bill's motor
Explanation:
Bill's motor lifts a box 0.39 metres in 2 seconds.
Nageen's motor lifts the same box 0.35 metres in 2 seconds.
Power = Work done/time
or
[tex]P=\dfrac{mg\times h}{t}[/tex]
Power of bill's motor,
[tex]P_1=\dfrac{m\times 9.8\times 0.39}{2}\\\\P_1=1.91m\ Watts[/tex]
Power of Nageen's motor,
[tex]P_2=\dfrac{m\times 9.8\times 0.35}{2}\\\\P_2=1.71m\ Watts[/tex]
So, Bill's motor applied more power to the box.
What is a convex lens?
The convex lens is a lens that converges rays of light that convey parallel to its principal axis (i.e. converges the incident rays towards the principal axis) which is relatively thick across the middle and thin at the lower and upper edges. The edges are curved outward rather than inward.
The amount of matter in an object is mass or weight
Answer:
mass
Explanation:
define amoeba what are your plans
Answer:
Amoeba (plural = amoebae) is a well known genus of unicellular organism, a protist. One of its most common species, the Amoeba Proteus, is about 0.2 to 0.3 mm large. The amoeba was first discovered by August Von Rosenhof in 1757.[1] It is a genus of protozoa that moves with false feet, called pseudopodia.
It's a single - called animal that catches good and moves around by extending fingerlike projections of protoplasm
A 20 kg cart moving at 4 m/s has how much momentum?
40 kg*m/s
40 kg*m/s
5 kg*m/s
5 kg*m/s
80 kg*m/s
Answer:
We conclude that the required momentum is 80 kgm/s.
Explanation:
Given
Mass m = 20 kgVelocity v = 4 m/sTo determine
The momentum p = ?
Important Tip:
The momentum of an object is the product of mass and velocity.We can determine the momentum using the formula
[tex]p = mv[/tex]
where
p is the momentumm is the massv is the velocitynow substituting m = 20 and v = 4 using the equation
[tex]p = mv[/tex]
[tex]p = (20) (4)[/tex]
[tex]p = 80[/tex] kg m/s
Therefore, we conclude that the required momentum is 80 kgm/s.
The momentum of the moving cart is 80kgm/s.
HOW TO CALCULATE MOMENTUM:
The momentum of a body can be calculated by multiplying the mass of that body by its velocity. That is;Momentum (p) = mass (m) × velocity (v)
According to this question, a 20kg cart moving at 4 m/s will have a momentum as follows:Momentum (p) = 20kg × 4m/s
Momentum (p) = 80kg*m/s.
Therefore, the momentum of the moving cart is 80kgm/s.Learn more at: https://brainly.com/question/17173143?referrer=searchResults
Question 8
Brooke wakes up in the morning to find a rainbow produced by light shining through the fish tank near
her window. Which of the following types of electromagnetic radiation produced the rainbow that
Brooke saw?
Ultraviolet
Infrared
White light
Gamma rays
Answer:
3.white light
Can someone answer these questions? Im really sorry for the long 15 questions but it would save me and basically my whole class.
Answer:
yes
Explanation:
???????????????
.i will name brainliest
What is the numerical value of the universal gravitational constant?
A) 9.8
B) 6.673 X 10-11
C) 6.3781 X 106
D) 0
what is the significance of the reed dance
Answer:
brings together the unmarried girls and young women of the country to cut reeds for the annual repairs
Answer:
The Umhlanga/Reed Dance brings together unmarried girls and young women of the country to cut reeds for the annual repairs to the windbreaks of the queen mother's village. It lasts for five days, and is also symbol of the unity of the nation.
What are three types of electromagnetic waves that are used to transmit information? What types of devices are used to receive each type of wave?
Type of electromagnetic wave:
Receiver devices:
Answer:
Three types of electromagnetic waves, used to transmit various information
Explanation:
A form of energy waves having both electric & magnetic fields are Electromagnetic waves. Three types -
Radio Waves - These have longest wavelengths & transmit data through radio, satellites, radar .
Micro Waves - These have shorter wavelengths & are used in cooking appliances & predicting weather.
X rays - These have more short wavelength and can penerate soft tissues like skin & muscle, hence are used for medical examining
Answer:
Three types of electromagnetic waves that are commonly used to transmit information are:
Radio Waves:
Radio waves are used for transmitting radio signals, television signals, and wireless communication. They are received by devices such as radios, televisions, and mobile phones with radio receivers.
Microwaves:
Microwaves are used for various purposes, including satellite communication, microwave ovens, and wireless data transmission. They are received by devices such as microwave antennas, satellite receivers, and Wi-Fi routers.
Light Waves (Optical Waves):
Light waves, specifically in the form of optical waves, are used for fiber optic communication, which involves transmitting data through optical fibers. They are received by devices such as optical receivers, which convert the light signals back into electrical signals for processing.
Each type of wave requires specific devices to receive and interpret the transmitted information effectively.
1)Move your eraser on your desk What do you feel while you turn on the eraser?
Answer:
The warmth you feel is the heat generated by the force of friction created by the rough surfaces of your hands rubbing together. As the abrasives in your eraser are rubbed against paper, friction produces heat, which helps the rubber become sticky enough to hold onto the graphite particles.
Explanation:
I hope this helps and pls mark me brainliest :)
Solve each problem. Show all work.
1. If the mass of an object is 5 kg and its velocity is 7.3 m/s, calculate the kinetic
energy
Answer:
Given
mass (m) =5kg
velocity (v) =7.3m/s
kinetic energy (k. e) =?
Form
[tex]k.e = \frac{1}{2} MV {}^{2} \\ = \frac{1}{2} \times 5 \times 7.3 {}^{2} \\ 133.23kj[/tex]
I hope this help
what is the dimensional formula of thermal conductivity?
Answer:
The dimension of thermal conductivity is M1L1T−3Θ−1, expressed in terms of the dimensions mass (M), length (L), time (T), and temperature (Θ). Other units which are closely related to the thermal conductivity are in common use in the construction and textile industries.
Explanation:looked it up for ya
plzs help me asap!!!!!
Directions: Write a T in the blank for True, or an F for False.
6. Newton's First Law states that every action has an equal/opposite reaction.
7. Newton's Second Law can be simplified to F=ma.
8. An object will move in the same direction as the unbalanced force acting upon it.
9. Friction always acts in the same direction as the motion of the object.
10. If there is no next force acting on an object, that means in ALL SITUATIONS that the object will not move.
Answer:
6. False 7. True 8. False (Unbalanced forces acting upon an object changes the object's motion) 9. False 10. True (I'm not 100% sure if these answers are right though.)
Answer:
I confirm that answer LOL
Explanation:
31 The diagrams show the forces acting on four identical balls.
Which ball has a resultant force acting to move it to the right?
Answer:
C
Explanation:
The force applied to it is causing it to move right.
need physics help
ASAP please!
Answer:
D
Explanation:
Are anxiety disorder curable
Anxiety disorders are not completely curable.
What are anxiety disorders?An anxiety disorder is a disorder in which an individual easily develops feelings of anxiety even in situations which do not warrant such feeling.
The individual feels excessively anxious that it becomes a disability and does not allow the individual to live a normal life.
There are five main types of anxiety disorders and they are as follows:
Generalized Anxiety DisorderObsessive-Compulsive DisorderPanic DisorderPost-Traumatic Stress DisorderSocial Phobia or Social Anxiety DisorderAnxiety disorders are not completely curable since they are purely psychological problems.
However, therapy and psychological assistance can lessen symptoms.
In conclusion, anxiety disorders affect productivity and makes an individual excessively anxious.
Learn more about anxiety disorder at: https://brainly.com/question/1394818
#SPJ1
Can someone help me answer this question what type of rock will form in this type of environment. Pls don’t guess and actually answer it
Answer:
Looks like A but I'm not sure.
Explanation:
dont take my word for it I might be wrong
Answer:
deforestación en el mundo es incontrolable
what is the universe made of?
Answer:
Composition. The universe is composed almost completely of dark energy, dark matter, and ordinary matter. Other contents are electromagnetic radiation (estimated to constitute from 0.005% to close to 0.01% of the total mass-energy of the universe) and antimatter.
Explanation:
your answer
A skier skies down a slope with an average speed of 50 km/s. How far does the skier travel in 5 minutes?
Answer:
15000000 m
Explanation:
From the question,
Speed (S) = Distance(d)/Time(t)
S = d/t....................... Equation 1
Make d the subject of the equation
d = St..................... Equation 2
Given: S = 50 km/s = 50000 m/s, t = 5 minutes = 5*60 seconds = 300 seconds
Substitute these values into equation 2
d = 50000(300)
d = 15000000 m
Hence the skier travels 15000000 m
Thermal energy involves the___stored in a system
A. Friction
B.electric current
C.heat
D.electromagnetic waves
Pls help
Answer:
c. heat
Explanation:
thermal energy IS heat energy
Based on Nia's notes, what would be the BEST way to investigate the heat transfer based on the movement of the molecules?
Answer: Nia could measure the temperature of the bottom floor of a house to see if the heat had risen in the house due to convection.
Explanation:
Answer:
Nia could measure the temperature of the bottom floor of a house to see if the heat had risen in the house due to convection.
Explanation:
Because energy transferred by the mass motion of molecules.
1. Pressing force = 10N , Area= 2m2 : Calculate pressure in N/m2
2. Pressing force = 70N, Area = 0.2m2 : Calculate pressure in N/m²
3. Pressing force = 300N , Area = 0.01m?: Calculate pressure N/m
4. Pressing force = 500N, Pressure = 20N/m² : Calculate area in m
5. Area = 0.003m2, Pressure = 15000N/m2 : Calculate the pressing force in N
I am so confused
Which of the following will best transport electrons around an electrical circuit
Answer:
b is correct!!!!!!!!!!!
The best transport electrons around an electrical circuit are connected in series. Thus, the correct answer would be option (B) are connected in series.
What is alternating current (AC)?An alternating current (AC) circuits continuously switches the direction of electron flow back and forth, which can result in fluctuations in voltage and current.
On the other hand, in a direct current (DC) electrical circuit, the electrons flow in one direction, from the negative terminal of the power source to the positive terminal. This unidirectional flow of electrons provides a consistent and stable flow of electricity throughout the circuit.
Connecting components in series mean that they are connected end-to-end, and the current flowing through them is the same.
Overall, the best option to transport electrons around an electrical circuit are to connect in series.
Therefore, the correct answer would be option (B) are connected in series.
Learn more about alternating current (AC) here:
https://brainly.com/question/28305485
#SPJ6
definition of angle of incidence
A kid is bouncing on a pogo stick. He oscillates 22.0 times in 14.9 S. What is his frequency? (Unit = Hz)
Answer:
1.4765 Hz
Explanation:
right on acellus
The frequency of an event is the inverse of time period.The frequency of the kid on bouncing the pogo stick is 1.47 Hz.
What is frequency?Frequency of an event is is the number of occurance of that event in unit time. It is the inverse of time period of that event. Hence frequency has the unit of s⁻¹ which is equivalent to Hz.
The frequency of a wave is the number of wave cycles per unit time. Frequency is directly related to the energy of the vibration or wave. Hence, as the frequency increases, energy increases.
Given that, the number of oscillations from the bouncing of the pogo stick is 22 times in 14.9 seconds. Thus , number of oscillations in 1 second is:
22 /14.9 s = 1.47 Hz.
Therefore, the frequency of the event created by the kid is 1.47 Hz.
To find more on frequency, refer here:
https://brainly.com/question/14320803
#SPJ2
Can you freeze sound waves
Answer:
I believe it's not possible
Explanation:
there's really no way I currently know of that we can do that so I suppose no.
The diagram shows forces acting on a boat.
Which arrow represents the direction of upthrust?
look at the photo
The arrow A represents the direction of upthrust.
What is thrust?Thrust is the pressure acting generally on a surface. Its SI unit is Newton (N). Thrust is the pressure that actions a plane via the air. Thrust is used to triumph over the drag of an airplane, and to conquer the load of a rocket.
As anxiety is the significance of pressure, it is measured in newtons (or now and again kilos-force) and is usually measured parallel to the string on which it applies. Thrust is a response pressure defined quantitatively by means of Newton's.
Learn more about thrust here:-https://brainly.com/question/13501791
#SPJ2
A car driving at 25 m/s, travels 318 m. How long does it take?
Answer:
12.72 sec
Explanation:
The time it takes to travel a certain distance can be found by dividing the distance that needs to be travelled by the speed with which you are travelling, therefore...
[tex]Time = \frac{Distance}{Speed} = \frac{318}{25} = 12.72 sec[/tex]
what are the methods of avoiding demagnetization
[tex] \\ [/tex]
The best method to use in prevention of self-demagnetization of a permanent magnet is by use of a keeper. Keepers were also commonly known as amateurs. They help in storing magnets safely, especially those that have low coercivity ( magnets that are extremely susceptible to stray fields).
[tex] \\ [/tex]
Hope It Helps!
