Answer:
36.76m/s²Explanation:
Given
Weight of the bucket = 20N
Mass = Weight/acceleration due to gravity
Mass = 20/9.8
Mass = 2.04kg
Applied force = 75N
Get the acceleration
According to Newton's second law:
F = ma
a = F/m
a = 75/2.04
a = 36.76m/s²
Hence the acceleration of the bucket is 36.76m/s²
How does energy travel? Where is the initial source of energy in our solar system? What is the process that gives off energy from the sun called?
Answer:
How does energy travel?
One way the energy can travel is through radiation. An object can radiate energy in the form of electromagnetic waves, for example when a strong light is turned on and you can feel some heat coming from it, or when you walk under the sunlight and you can feel the heat in your skin.
Where is the initial source of energy in our solar system?
In the solar system, the source of energy comes from the Sun, and the sun irradiates that energy to all the nearby objects.
What is the process that gives off energy from the sun called?
The process is called radiation, this is all the energy that comes from the sun in the form of different electromagnetic waves (light in the visible range, UV rays, etc...)
What happens to the energy when the material is changed?
Answer: When a material is heated or cooled, two changes may happen to the particles within the material: Chemical bonds between the particles may form, break or stretch. There is a change in the chemical potential store of energy in the material. The material will heat up or cool down as the particles within it gain or lose speed.
Explanation:
What will most likely happen if a sound wave moves from the air through a solid?
It will increase in wavelength.
It will decrease in speed.
It will increase in speed.
It will decrease in wavelength.
Please I need help with this question (see image).
Show workings where necessary.
Answer:
Solution:
i) Heat supplied by heater = Heat gained by water = m * c*theta = 0.12Kg * 4200 * 10 = 5040Joules in 2 minutes.
ii) Power = Energy/time = 5040J/(2 * 60seconds) = 5040J/120seconds = 42Watts.
(iii) Heat supplied to the 70g of water = m * c * theta = 0.07Kg * 4200 * 9K = 2646J
(iv) Heat supplied by heater = Heat gained by 70g of water + Heat supplied to the metal vessel.
But,from our calculations above,
Heat supplied by heater = 5040J ......and
Heat supplied to the 70g of water = 2646J
.: substituting the values,we have that :
5040J = 2646J + Heat supplied to the metal vessel.
5040J - 2646J = Heat supplied to the metal vessel.
.: Heat supplied to the metal vessel = 2394J.
(v) Heat gained by metal vessel = Heat capacity of the vessel * theta.
2394J = Heat capacity of the vessel * 9K
.: Heat capacity of the vessel = 2394/9 = 266(Joule per Kelvin)
(vi) Using the formula:
Heat Capacity = mass * specific heat capacity
.: Specific heat capacity = Heat Capacity/mass = 266/0.55 = 484(Joules per Kilogram per Kelvin)
Explanation:
________❤️ hope it helps you ❤️__________Explained and elaborate further the function of assessing responsiveness
A box on the ground is being pulled from the left and right by string. The box is accelerating to the left. What five forces are being used?
Answer:
push and pull,kinetic energy,force,and motion. I hope this helped if I get you this question wrong I deerly aploizge.
What is the temperature shown on the thermometer below?
A. 8 °F
B. 4 °F
C. –4 °F
D. –8 °F
Answer:
D, -8 F
Explanation:
This specific thermometer is in increments of two degrees per minor line and 10 per thicker line. Since the thermometer is showing below zero, the answer cannot be A or B since they are positive. -4 Cannot be the answer since the line addition does not make sense for that. It would be -4 if the thick line increments were 5 degrees instead of ten. Therefore if you count the lines by two from zero down to the thermometer line, you would get -8 Degrees F
what substance is used by plants as a source of food
Answer:
dart
Explanation:
dart and sun and water so that the plant be okay
The Big Bang Theory was supported by the discovery of the
red shift in electromagnetic spectrum
gravitational force between planets
temperature of the universe
galaxies in the universe
three advantages of simple machines.please tell fast
Answer:
they can help make clothing, they are useful for human like work, they are better than hand making
Determine the mass of a boat that is propelled forward by a force of 1250N at an acceleration of 3 m/s2.
Answer:
416.6 KG
Explanation:
Due to the mass being missing from the equation you divide the force by the acceleration
Which is a possible result of higher air temperatures caused by global warming?
increase in sea level
freezing of polar ice caps
rapid evaporation of water in the soil
flooding of low-lying coastal areas
Answer: C. rapid evaporation of water in the soil :)
A possible result of higher air temperatures caused by global warming is rapid evaporation of water in the soil.
What is global warming and its causes and consequences?Global warming is a phenomenon that has been registered around the world during the last decades. It refers to a progressive increase in the average temperatures of the oceans and the Earth's atmosphere, which has consequences for flora and fauna, in addition to impacting critical sectors such as agribusiness.
Among the consequences of global warming are melting ice, rising sea levels, desertification, changes in rainfall, floods and reduced biodiversity.
See more about global warming at brainly.com/question/12908180
9. Which is the type of force that causes acceleration?
a.balanced
b.zero
c.unbalanced
Explanation:
Answer:-Unbalanced Force causes acceleration.
But why?
This is because for accelerating a body we need unbalanced forces to move it.
Hope it helps :)
Which example of heat transfer is due mainly to convection?
Does anyone know how to do this pleaseeeee
Answer:
See the answer below.
Explanation:
The latent heat of fusion is defined as the amount of energy needed to make a phase change from solid to liquid. And it can be calculated by means of the following expression:
[tex]Q_{fusion}=m*Dh[/tex]
where:
Qfusion = Heat Energy [J]
m = mass = 0.65 [kg]
Dh = latent heat fusion = 330000[J/kg]
[tex]Q_{fusion}=0.65*330000\\Q_{fusion}=214500[J][/tex]
2)
We know that energy can be calculated from power, where power is defined as the relationship between energy over time.
[tex]P=E/t[/tex]
where:
P = power = 60 [w]
E = energy [J]
t = time = 5 [min] = 300 [s]
[tex]E=P*t\\E=50*300\\E=15000[J][/tex]
The mass change due to the process is equal to:
[tex]m=282-274\\m=8[g]=0.008[kg][/tex]
Now using the following equation for the latent heat of Fusion, we can calculate this value:
[tex]Q=m*Dh\\Dh =Q/m\\Dh=15000/0.008\\Dh=1875000[J/kg][/tex]
The current flowing through the heating element when a toaster is plugged into a 230V mains supply, if the element has a resistance of 265Ω.
Answer:
The current flowing the heating element is 0.868 amperes.
Explanation:
Ohm's law states that voltage is directly proportional to current. In other, words, we say that:
[tex]V \propto R[/tex]
[tex]V = i\cdot R[/tex] (1)
Where:
[tex]V[/tex] - Voltage, measured in volts.
[tex]i[/tex] - Current, measured in amperes.
[tex]R[/tex] - Resistance, measured in ohms.
If we know that [tex]V = 230\,V[/tex] and [tex]R = 265\,\Omega[/tex], then the current that flows through the heating element is:
[tex]i = \frac{V}{R}[/tex]
[tex]i = \frac{230\,V}{265\,\Omega }[/tex]
[tex]i = 0.868\,A[/tex]
The current flowing the heating element is 0.868 amperes.
Two spherical objects have masses of 200 kg and 500 kg. Their centers are separated by a distance of 25 m. Find the gravitational attraction between them.
Answer:
1.07 x 10⁻⁸N
Explanation:
Given parameters:
Mass 1 = 200kg
Mass 2 = 500kg
Distance of separation = 25m
Unknown:
Gravitational attraction between the two bodies = ?
Solution:
To solve this problem, we use the equation of the universal gravitation;
F = [tex]\frac{G mass 1 x mass 2}{r^{2} }[/tex]
G is the universal gravitation constant = 6.67 x 10⁻¹¹Nm²kg⁻²
r is the distance
Now insert the parameters and solve;
F = [tex]\frac{6.67 x 10^{-11} x 200 x 500 }{25^{2} }[/tex] = 1.07 x 10⁻⁸N
Given:
Mass of objects,
[tex]m_1 = 200 \ kg[/tex][tex]m_2 = 500 \ kg[/tex]Distance,
[tex]r = 25 \ m[/tex]We know,
[tex]G = 6.67\times 10^{-11} \ Nm^2/kg^2[/tex]As we know the relation,
→ [tex]F_G = \frac{Gm_1m_2}{r^2}[/tex]
By substituting the values, we get
[tex]= 6.67\times 10^{-11}\times \frac{200\times 500}{(25)^2}[/tex]
[tex]= 1.0672\times 10^{-8} \ N[/tex]
Thus the above answer is right.
Learn more about gravitation here:
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Which is a possible result of rising ocean temperatures caused by global warming?
formation of dust bowls
increase in strength of hurricanes
rapid evaporation of water in soil
decrease in population due to health threats
Answer:
Increase in strength of hurricanes
Explanation:
A possible result of rising ocean temperatures caused by global warming is an increase in the strength of hurricanes, which is the second option. As the ocean temperatures increase, more energy is available to fuel hurricanes, making them stronger and potentially more destructive.
What is global warming?Global warming is causing the earth's climate to change, which is having a significant impact on the world's oceans. As the temperature of the oceans increases, a variety of effects can occur. One of the most well-documented impacts is the increase in the strength of hurricanes. Hurricanes form over warm ocean waters, and as the water temperature rises, it provides more energy to the storm, making it more powerful.
Hence, a possible result of rising ocean temperatures caused by global warming is an increase in the strength of hurricanes, which is the second option.
Learn more about global warming here.
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In which stage of sleep are you likely to experience hypnagogic
sensations of falling asleep
NREM-1 got this off a website
7. The S.l. unit for force is
A. kg
C. m/s
B. m/s2
D. N
Imagine you are an astronomer who recently discovered a new planet orbiting a distant star. Which set of characteristics would you use to classify this planet as an inner or terrestrial planet? Check all that apply.
-dense and solid
-very large
-thick atmosphere containing hydrogen and helium
-lacking a solid surface
-located near a star
Answer:
The right characteristics to be used for the classification include:
-dense and solid
-very large
-located near a star
Explanation:
The above listed characteristics are part of the characteristics used in classifying a planet as a habitable planet or non-habitable one. When a planet is closer to a star which revolves around it, this helps in supplying the needed light to it.
Answer:
dense and solid
located near a star
Explanation:
Which statement about this figure is false
A. Line E represents a fault line.
B. Layer C is the youngest layer.
C. d,ike K is older than layer I.
D. The fault occurred after layer F formed.
The statement about the figure that is false is that d,ike K is older than layer I. That is option C.
What is cross-cutting relationships in geology?Cross-cutting relationships is a principle that when a body pass through different layers in geology, it is usually younger than all the layers it passed through.
That is to say that, d,ike K is younger than layer I, D and B which it passed through.
Learn more about fault lines here:
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Answer:
If it's not C then it HAS to be B.
Explanation:
By deductive reasoning.
If a certain test follows a normal curve, most of the scores will fall
A. at the top end
B. at the bottom end
C. all over the place
D. in the middle
Please select the best answer from the choices provided
Ο Α
OB
С
OD
Answer:
im pretty sure its d
Explanation:
You are lifting a 15 kg weight. You lift the bar 0.25 m a total of 15 times.
a. What is the total height the bar was lifted?
b. What is the force needed?
c. What is the work done?
Explanation:
Given parameters:
Mass of the weight = 15kg
Height of bar lift = 0.25m
Number of times lifted = 15times
Unknown:
Total height the bar was lifted = ?
Force needed for the lift = ?
Work done = ?
Solution:
To solve this problem we need to understand that;
Work done = Force x distance
Work done = mass x acceleration due gravity x height
Work done = weight x height
a. Total height:
Total height = 0.25 x 15 = 3.75m
b. Force needed ;
Force needed = Weight of bar = mass x gravity
= 15 x 9.8 = 147N
So;
Force used for the 15 times = 15 x 147 = 2205N
c. Work done ;
Work done = weight x height = 2205 x 3.75 = 8268.75J
A boy and a girl are balanced on a massless seesaw. The boy has a mass of 75 kg and the girl's mass is 50 kg. If the boy sits 2.0 m from the pivot point on one side of the seesaw, where must the girl sit on the other side?
Answer:
The girl must sit 5 m on the other side of the seesaw.
Explanation:
Given;
mass of the boy, = 75 kg
mass of the girl, = 50 kg
distance of the boy from the pivot, = 2 m
let the distance of the girl from the pivot = d
<-------------2m-------------><-------------d-------------->
-----------------------------------------------------------------------------------
↓ Δ ↓
75 50
Apply the principle of moment, about the pivot;
clockwise moment = anticlockwise moment
75 x 2 = 50 x d
150 = 50d
d = 150 / 50
d = 3 m
The distance of the girl from the pivot is 3 m.
Therefore, the girl must sit ( 2m + 3m ) on the other side of the seesaw.
A motorcycle engine provides 473.3 N of force for 11.9 seconds. If the rider and the cycle have a mass of 2,068.3 kg, determine the change in velocity.
Answer:
After 11.9 seconds, the velocity will increase by approximately 2.7 m/s
Explanation:
Ignoring friction, we can simply say that the speed will increase by
11.9s × 473.3N / 2068.3kg
Which can be expressed as:
11.9s × 473.3kg·m/s² ÷ 2068kg
= (11.9 × 473.3 ÷ 2048.3) (kg·m/s² × s ÷ kg)
≈ 2.7 m/s
How fast is a 85 kg football player moving if they have a momentum of 125 kg*m/s?
Answer:
v = 1.5 m/s
Explanation:
m = 85 kg
p = 125 kg m/s
v = ?
p = m v
125 kg m/s = (85 kg) (v)
v = (125 kg m/s) / (85 kg)
v = 1.47 m/s
A big kid pushes a little kid and the little kid falls backward. The big kid remains relatively stationary. What best explains this
Answer:
Becase he pushed the little kid not himself
Explanation:
a tree is blank relative to earth a tree is blank relative to the sun
hmmmmmmmmmmmmmmmmm ask someone else sorry if im not helping
Find the centripetal force needed to keep an 60.0 kg rider traveling in a circle in the ride.
Given:
m=
V = (from part a)
R =
Unknown:
F=?
Equation:
F= m (y^2) / r
Explanation:
Given that,
Mass of the rider, m = 60 kg
Let the radius of the circle, r = 30 cm = 0.3 m
Let the velocity, v = 20 m/s
We need to find the centripetal force needed to keep the rider in a circular path. It can be given by :
[tex]F=\dfrac{mv^2}{r}\\\\F=\dfrac{60\times (20)^2}{0.3}\\\\F=80000\\\\\text{or}\\\\F=8\times 10^4\ N[/tex]
So, the required force is [tex]8\times 10^4\ N[/tex].