Answer:
0.52 N
Explanation:
k = 13 N/m
x = 0.04 m
Plug those values into Hooke's Law:
F = kx
F = (13 N/m)(0.04 m)
F = 0.52 N
The magnitude of spring force acting on the ball when the spring is released is 0.52 N.
What is meant by spring force ?When a spring is extended or compressed, it produces a restoring force known as the spring force. Its displacement from its relaxed length is proportional to and in the opposite direction of it.
Here,
Displacement of the spring, x = 4 cm = 4 x 10⁻² m
Spring constant of the spring, k = 13 N/m
The spring is moved from its equilibrium position when it is compressed by the pinball machine. As a result, it encounters a restoring force that usually causes the spring to restore back to its initial position.
The expression for the restoring spring force is given by,
F = -kx
the negative sign implies that the force is restoring and is acting opposite to the direction of displacement.
F = kx
F = 13 × 4 x 10⁻²
F = 0.52 N
Hence,
The magnitude of spring force acting on the ball when the spring is released is 0.52 N.
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Julio decides to break the Guinness Book of World Records for bungee jumping. He goes
to the Macau Tower in China where the current record is held. After several heart-pounding
seconds, he leaps from a height of 233 meters. If his weight is 86 kilograms, what would his
potential energy be just prior to jumping? If when he jumped he reached a speed of 15 m/s, what
is his kinetic energy? Explain your answer
Answer:
a) U = 1.96 10⁵ J, b) K = 9.675 10³ J
Explanation:
a) the potential energy is
U = m g h
where zero energy in general takes the floor
let's calculate
U = 86 9.8 233
U = 1.96 10⁵ J
b) They ask for kinetic energy and give us the speed of man
K = ½ m v²
let's calculate
K = ½ 86 15²
K = 9.675 10³ J
ist Law of Thermodynamics
Question 2 of 10
What is the change in internal energy if 20 J of heat is released from a system
and the system does 50 J of work on the surroundings?
Use AU = Q-W.
A. 30 J
B. 70 J
C. 30 J
D. -70J
Answer:
Change in heat energy = -30 J
Explanation:
Given:
AU = Q-W
Heat energy Q = 20 J
Work done W = 50 J
Find:
Change in heat energy
Computation:
Change in heat energy = 20 J - 50 J
Change in heat energy = -30 J
you can find the power of an electric appliance by measuring the energy it transfers in a certain what?
The power of an electrical appliance tells us how much electrical energy it transfers in a second. Power, P is measured in watts (W) where:
1 W = 1 J/s (joule/second).
How is energy transfer measured?
Power is the rate of transfer of energy between energy stores.
One watt (W) is equal to one joule per second (J/s).
Energy transferred-
power is measured in watts (W)energy is measured in joules (J)time is measured in seconds (s)Learn more about the power of an electric appliance here: https://brainly.com/question/2288373
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An ac generator provides emf to a resistive load in a remote factory over a two-cable transmission line. At the factory a step- down transformer reduces the voltage from its (rms) transmission value Vt to a much lower value that is safe and convenient for use in the factory. The transmission line resistance is 0.30 /cable, and the power of the generator is 250 kW. If Vt 80 kV, what are (a) the voltage decrease V along the transmission line and (b) the rate Pd at which energy is dissipated in the line as thermal energy
Answer:
a) 1.875 volts
b) 5.86 W
Explanation:
Given data:
transmission line resistance = 0.30/cable
power of the generator = 250 kW
if Vt = 80 kV
a) Determine the decrease V along the transmission line
Rms current in cable = P / Vt = 250 / 80 = 3.125 amps
hence the rms voltage drop ( Δrmsvoltage )
Δrmsvoltage = Irms* R = 3.125 * 2 * 0.30 = 1.875 volts
b) Determine the rate Pd at which energy is dissipated in line as thermal energy
Pd = [tex]I^2rms*R[/tex]
= 3.125^2 * 2* 0.30 = 5.86 W
A steel fork and a plastic spoon are both at the same temperature. The fork feels colder when you touch it. This is because:
1. Steel conducts thermal energy better than plastic.
2. Plastic loses more thermal energy than steel.
3. Steel contains more thermal energy than plastic.
4. The fork has more mass than the spoon.
Answer: The fork feels colder when you touch it because Steel conducts thermal energy better than plastic. The correct statement is 1
Explanation:
The ability of a material to transfer heat energy in an environment is known as thermal conductivity. It feels cooler to touch a steel spoon than a plastic spoon found in the same temperature because steel which is a type of metal is a highly efficient thermal conductor than spoon which is a plastic.
Metals can be defined as those substances which forms positive ion in a chemical reaction by lossing it's electrons. It has the following properties:
--> it is solid at room temperature
--> it has high melting point
--> it has high boiling point and
--> it is malleable.
Metals are said to be good thermal conductor because they contain free flowing conduction electrons. Therefore, when you touch a steel spoon and plastic spoon, it feels cooler because the steel metal is able to conduct heat away from your hand faster than the plastic which is a poor conductor of heat.
Answer:
1. Steel conducts thermal energy better than plastic.
Explanation:
Both objects are at the same temperature, and when you touch them, you feel the steel to be colder.
This happens because steel is a better thermal conductor, then when you touch it, it "steals" more thermal energy from you than the plastic.
As the amount of thermal energy transmitted is greater for the steel, you will feel it to be colder.
Then the correct option is the first one, steel conducts thermal energy better than plastic.
what do we mean by principle of conservation?
Answer:
Conservation principles tell us that some quantity, quality, or aspect remains constant through change.
Explanation:
Three materials, put them in order of what
light does when it hits them.
clay, shiny dimes, eyeglasses
Answer:
it's a
Explanation:
hope this helps!!!!!!
Consider the differences between a horseshoe magnet and a bar magnet. Is the attraction or repulsion going to be stronger or weaker between two horseshoe magnets or two bar magnets, as shown here? How would that influence the density of magnetic field lines?
Answer:
Stronger.
Explanation:
The following table describes some landforms.
Landform Created By Found In
Wind erosion Water or glacial erosion Depositions Deserts Coasts Mountains
A Yes Yes No No Yes No
B Yes No Yes Yes Yes No
C No Yes No No No Yes
D No No No No No No
Which landform is most likely a valley?
Landform A
Landform B
Landform C
Landform D
Answer:
Landform A.
Explanation:
Coastlines are created by wind and water erosion. The coast, also known as the coastline or seashore, is defined as the area where land meets the sea or ocean, or as a line that forms the boundary between the land and the ocean or a lake. The picture/graph associated with this question is attached.
Answer:
Landform A.
Explanation:
According to the big-bang theory how the universe might end?
Answer:
If the Universe holds enough matter, including dark matter, the combined gravitational attraction of everything will gradually halt this expansion and precipitate the ultimate collapse. Over time, galaxies, then individual stars, will smash into each other more frequently, killing off any life on nearby planets.
An object's WEIGHT describes how much force the object presses down on the Earth. It can be calculated using the formula WEIGHT = MASS x GRAVITY. REmember that gravity on the Earth is 10m/s2. If Susan has a mass of 70Kg, what is her weight in newtons?
Answer:
700N
Explanation:
W=m×g
W=70kg×10N/m
W=700N
TAKING TEST NOW NEED ASAP !!
What does the standard deviation of a set of data tell you?
A. The maximum value of the data
B. How many data points there are
C. How spread out the data are
D. The smallest data value
Answer:
C
Explanation:
I think that's it. dont know if that's rogue
Answer:
c
Explanation:
i dont know
just felt
a loud soundin heared at resonence why
ANSWER :
Complete answer:
The resonance happens when the frequency of the vibration of one body matches with the frequency of vibration of another body. ... So, the loud music causes the air particles to vibrate and when we stand close to the source of loud music, it causes resonance and hence we feel our body shake or vibrate.
What would likely happen first to the carbon in the deer carcass as it lies on the forest floor after the mountain lion has finished feeding on it?
a.
It would be incorporated into other organisms.
b.
It would be released back into the atmosphere.
c.
It would be turned into coal.
d.
It would be incorporated into the soil.
Answer:
B: It would be released back into the atmosphere.
Explanation:
What is static friction?
A. Friction that acts when an object is not moving
B. Friction that exerts no force
O C. Friction that opposes air resistance
D. Friction that acts on a sliding object
Answer:
the awsner is d because friction is caused by two objects touching
Answer:
It’s friction that acts when an object is not moving
Explanation:
What kind of friction exists between solid objects moving In water?
static friction
sliding friction
rolling friction
drag
Answer:
The answer is drag.
Explanation:
Hope this helped Mark BRAINLEST!!!!!
Answer: D. Drag
Explanation:
Drag friction exists between solid objects moving in the water.
what if you were a mother for a day boys and girls
PLS HURRY THIS IS DUE IN 5 mins
(a) Waves P and Q have the same
but wave P has twice the
of wave Q.
(b) Waves Q and R have the same
but wave R has twice the
of wave Q.
(c) Wave
shows a steady frequency but changing amplitude.
(d) Wave
shows steady amplitude but a changing frequency
Tel Waves
and
have a lowamplitude and a steadvafrecuency
Answer:
(a) Waves P and Q have the same wavelength but wave P has twice the amplitude of wave Q.
(b) Waves Q and R have the same amplitude but wave R has twice the wavelength of wave Q.
(c) Wave T shows a steady frequency but changing amplitude.
(d) Wave S shows steady amplitude but a changing frequency.
e) Waves Q and R have a low amplitude and a steady frequency.
AWARDING BRAINLIEST
The distance traveled divided by the time taken to travel the distance is ____.
a.
average speed
c.
momentum
b.
mass
d.
velocity
the answer is A
average speed
TIME REMAINING 54:08 If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them? from the hand to the cup from the cup to the hand from the cup to the surrounding air from the hand to surrounding air
Answer:
from the cup to the hand
Explanation:
Conduction is the heat transfer due to contact between object. During conduction, heat energy is transferred by contact from a body with higher temperature (hotter body) to a body with lower temperature (cooler body).
When a person with body temperature of 36°C comes in contact with a cup of coffee with temperature of 90°C, heat is transferred from the cup to the hand because the cup is hotter.
How are faults that occur in the middle of tectonic plates different from plate boundaries?
Causes of Earthquake
An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction.
Five causes of earthquake?
1. Volcanic Eruptions. The main cause of the earthquake is volcanic eruptions.
2. Tectonic Movements. The surface of the earth consists of some plates, comprising of the upper mantle
3. Geological Faults
4. Groundwater extraction – decrease in pore pressure.
5. Groundwater – increase in pore pressure.
6. Heavy rain.
7. Pore fluid flow.
8. High CO2 pressure.
9. Building dams.
Explanation:
Now, Boundaries between tectonic plates are made up of faults. which are associated with the various types of fault, normal, reverse and strike-slip faults
More so, Plate boundaries are always faults, but not all faults are plate boundaries.
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a rock on the moon has a mass of 17kg, what is the mass if this same rock on earth?
Mass is an intrinsic property of the rock. The mass doesn't care where it is, and it makes no difference where the rock happens to be at the moment ... its mass doesn't change.
17kg of mass is 17kg . If it's 17kg on the moon, it's 17kg on Earth.
Explain how height, acceleration, and speed would affect the movement of a roller coaster.
Answer:
height affects the acceleration, which means it could go faster at the end of the slope since it got more distance to travel. acceleration could affect the speed of the roller coaster because it will go faster as it approaches the end of the slope and speed can affect the height it reaches because the faster it goes, the more distance it can travel before reaching to a stop.
Explanation:
ocean high tides are an example of a 1 contact 2 non contract 3 neither. force
Answer:
1 contact
Explanation:
That is because the wind contacts the waves ang they go high.
A copper coin resting on a piece of cardboard is placed on a beaker as shown in the diagram below. When the cardboard is rapidly removed, the coin drops into the beaker. The two properties of the coin which best explain its fall are its weight and its-
A: Temperature
B: Density
C: Volume
D: Inertia
What is the speed of a shark that traveled 15 miles in 1 hour
Soln_
T = 1 hrs × 15 mils
=60 × 15
=900 ans#
What was the change in height of an object if the system gains 50 J of gravitational potential energy from the movement of a 10 kg object?
Answer:
Height, h = 0.51m
Explanation:
Given the following data;
Mass = 10kg
Gravitational potential energy = 50 Joules
To find the change in height;
Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
Gpe = mgh
Where,
Gpe represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
Substituting into the formula, we have;
50 = 10*9.8*h
50 = 98h
h = 50/98
h = 0.51m
How many months does it take for the sun to go around earth?
Answer:
Well, 365 days is about how long it takes for Earth to orbit all the way around the Sun one time.
Which element is always found in bioclastic sedimentary rocks?
The element which is always found in bioclastic sedimentary rocks is carbon.
What are sedimentary rocks?They are the types of rocks which are formed as a result of accumulation of minerals or organic particles at the surface of the earth.Sedimentation is the name given to a collective process which cause the particles to settle.
The study of sedimentary rocks is useful in civil engineering and as important sources of coal, fossil fuels and ores.The color of sedimentary rock is often determined by iron content and sometimes due to the presence of organic matter.
They are classified based on origin in to 4 types which are clastic, biochemical ,chemical and other sedimentary rocks.While based on composition they are classified as siliciclastic,carbonate ,evaporite,organic rich,siliceous ,iron-rich and phosphatic sedimentary rocks.
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HELP PLS WILL MARK BRAINLEST
A bobsled is moving at its greatest speed around the final turn.
O Potential
O Kinetic
Answer: Kinetic Energy
Explanation: