Answer:
about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula a spinning, swirling disk of material.
Explanation:
i truly need help with these 10 questions , it soo late and i only have 2 days too turn it in please anybody help me !!
How much electricity is used to boil 600 g of water if the kettle has a power of 1500 W? The water boiled for 3 minutes and 9 seconds. Water density is 1000 kg/m3, specific heat of water is 4200 J/(kg· oC).
Answer:
The electrical energy consumed in boiling the water is 0.0788 kWh
Explanation:
Given;
mass of the water, m = 600 g = 0.6 kg
power rating of the kettle, P = 1500 W = 1.5 kW
specific heat capacity of water, c = 4,200 J/kg⁰C
density of water, = 1000 kg/m³
time taken to boil the water, t = 3 mins + 9 s = (3 x 60s) + 9 s = 180 s + 9 s = 189 s = [tex]189 \ s \times \frac{1 hr}{3.600 \ s} = 0.0525 \ hr[/tex]
The electrical energy consumed in boiling the water is calculated as;
E = P x t
E = 1.5 kW x 0.0525 hr
E = 0.0788 kWh
Therefore, the electrical energy consumed in boiling the water is 0.0788 kWh
UM CAN SOME GIVE ME THE ANSWER PLS IM LIKE DYING I RLLY NEED THE ANSWER ITS DUE IN 2 MIN
In addition to thermal conductivity, what other properties of materials would
need to be considered when designing and building houses? Give three
suggestions.
Answer:
Wood, metal, Stone
Explanation:
Answer:
Thermal resistance,Specific Heat Capacity,Density
Explanation:
Which region on the map has the highest risk of future landslides?
Answer:
Reigon 1
Explanation:
It has the higest rate of landslides currently
2. A ball is dropped from rest. The acceleration due to gravity is 10m/s? and the time it
takes for the ball to reach the ground is 5 seconds. What was the velocity of the ball just
before it hits the ground
Answer:
STEP BY STEP
V = S/T
V= 10/5
V = 2 m/s
HELP
as shown in the diagram, points p,q, and r are located near a positively charged object.
name one property you know about LIGHT. Explain.
Answer:
The primary properties of visible light are intensity, propagation-direction, frequency or wavelength spectrum and polarization, while its speed in a vacuum, 299 792 458 m/s, is one of the fundamental constants of nature.
Explanation:
Light is made of particles called photons, bundles of the electromagnetic field that carry a specific amount of energy. With sufficiently sensitive experiments, you can count photons or even perform measurements on a single one. Researchers have even frozen light temporarily.
Hope this Helps :)
In aluminum, the speed of sound is 5100 m/s What the wavelength a sound wave of middle C at 264 Hz traveling through aluminum?
Answer:
19.32
Explanation:
the wavelength formula is speed divided by frequency
speed = 5100m/s
frequency = 264Hz
so wavelength = 5100 m/s / 263 Hz
= 19.32
A 1500 kg car accelerates at 3 m/s^2. What is the net force acting on the car?
Answer:
4500N
Explanation:
Force =mass into acceleration
So 1500 into 3 you will get 4500
Can scientific laws be changed by a vote
Answer:
No, because a scientific law is always absolutely true, no matter what a vote could not change a scientific law. People can vote how fast the speed of light is per second, but light will always be the speed it is no matter what.
what type of object is called the object at rest
Rest is the state of an object being stationary relative to a particular frame of reference or another object; when the position of a body with respect to its surroundings does not change with time it is said to be "at rest".
Which statement best describes the work and energy in these examples?
Example 1: Running a car requires gas.
Example 2: Humans require food to live.
The gas and food are examples of energy.
The gas and food are examples of work.
The gas and humans are examples of work.
The food and car are examples of energy.
Answer:
the văd and food are exemple of energy
Answer:
the gas and food are example of energy
Explanation:
EDGE 2021
A 8.73-g bullet is moving horizontally with a velocity of 345 m/s, where the sign indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. The bullet passes completely through the first block (an inelastic collision) and embeds itself in the second one, as indicated in part b. Note that both blocks are moving after the collision with the bullet. The mass of the first block is 1201 g, and its velocity is 0.714 m/s after the bullet passes through it. The mass of the second block is 1606 g. (a) What is the velocity of the second block after the bullet imbeds itself
Answer:
v₃ = 1.334 m/s
Explanation:
This problem can be solved using the law of conservation of momentum:
[tex]m_{1}u_{1} + m_{2}u_{2} + m_{3}u_{3} = m_{1}v_{1} + m_{2}v_{2} + m_{3}v_{3}\\[/tex]
m₁ = mass of bullet = 8.73 g = 0.00873 kg
m₂ = mass of first block = 1201 g = 1.201 kg
m₃ = mass of second block = 1606 g = 1.606 kg
u₁ = initial speed of bullet = 345 m/s
u₂ = initial speed of first block = 0 m/s
u₃ = initial speed of second block = 0 m/s
v₁ = final speed of bullet = v₃ (since the bullet is embedded in second block)
v₂ = final speed of first block = 0.714 m/s
v₃ = final speed of second block = ?
Therefore,
[tex](0.00873\ kg)(345\ m/s)+(1.201\ kg)(0\ m/s)+(1.606\ kg)(0\ m/s)=(0.00873\ kg)(v_{3})+(1.201\ kg)(0.714\ m/s)+(1.606\ kg)(v_{3})[/tex]
[tex]3.0118\ kg.m/s - 0.8575\ kg.m/s = (1.6147\ kg)(v_{3})\\\\v_{3} = \frac{2.1543\ kg.m/s}{1.6147\ kg} \\[/tex]
v₃ = 1.334 m/s
Why does it take 2 days longer for the Moon to go from New Moon to New Moon when viewed form the Earth than it takes for the the moon to make 1 complete rotation on its axis?
The time between two new Moon phases or two full Moon phases is 29.5 days. ... The difference of 29.5 and 27.3 is that while the Moon is orbiting the Earth, the Earth is moving along in its orbit so it takes longer for the Moon to reach the same position relative to the Sun.
Temperature and kinetic energy have a________
relationship.
Multiple-Concept Example 6 presents a model for solving this problem. As far as vertical oscillations are concerned, a certain automobile can be considered to be mounted on four identical springs, each having a spring constant of 1.21 x 105 N/m. Then, four identical passengers are seated in the car, and it is set into a vertical oscillation that has a period of 0.371 s. If the mass of the empty car is 1400 kg, determine the mass of each passenger. Assume that the mass of the car and its passengers is distributed evenly over the springs.
Answer:
[tex]71.865\ \text{kg}[/tex]
Explanation:
Mass of car = 1400 kg
T = Time period = 0.371 s
k = Spring constant = [tex]1.21\times 10^{5}\ \text{N/m}[/tex]
Time period is given by
[tex]\dfrac{1}{T}=\dfrac{1}{2\pi}\sqrt{\dfrac{k}{m}}\\\Rightarrow m=4\dfrac{kT^2}{4\pi^2}\\\Rightarrow m=\dfrac{4\times 1.21\times 10^5\times (0.371)^2}{4\pi^2}\\\Rightarrow m=1687.46\ \text{kg}[/tex]
The 4 in the numerator is because there are 4 springs
Mass of car with people is 1687.46 kg.
Mass of people
[tex]1687.46-1400=287.46\ \text{kg}[/tex]
Mass of each person
[tex]\dfrac{287.46}{4}=71.865\ \text{kg}[/tex]
Mass of each person is [tex]71.865\ \text{kg}[/tex].
Please help?? PWEASE PWEASE PWEASE
Describe how you would draw a diagram that shows the electric field between two particles that attract each other.
Answer:
draw the two atomic structures and then focus in on the electrons either gaining or losing and draw them with arrows and dots
Explanation:
an elevator provides 21 000 w of power during a 12 s ride. how much work does the elevator do?
Answer:
252000 J
Explanation:
W = Pt
W = (21000 w)(12 s)
W =252000 J
Mr. LaCosta is making a circular garden for our outdoor green space. The garden has a diameter of 11m. He has to buy plastic fencing to put around the edge. The fencing costs $5.75/m. What would be the total cost before taxes?
Answer:
The total cost before taxes to fence the garden is approximately $198.71
Explanation:
The given parameters for the garden are;
The diameter of the garden, D = 11 m
The cost of the fencing, UnitC = $5.75/m
The circumference of a circle, C = π·D
Therefore, the perimeter of the garden, C = π × 11 m ≈ 34.5575 m
The total cost before taxes to fence the garden, T = C × UnitC
∴ The total cost before taxes to fence the garden, T, is given as follows;
T ≈ 34.5575 m × $5.75/m ≈ $198.71
The total cost before taxes to fence the garden, T ≈ $198.71
the letter R in the world Warm reminds you that warm air does what
If a 5 kg cart is pulled with a net force of 20 Newtons. What is the magnitude, in m/s2, of the acceleration?
Answer:
F=ma
a=F/m=20/5=4 m/s^2
What are the energy transformations that occur during a roller coaster ride? 1 paragraph
Answer:
The movement of a roller coaster is accomplished by the conversion of potential energy to kinetic energy. The roller coaster cars gain potential energy as they are pulled to the top of the first hill. As the cars descend the potential energy is converted to kinetic energy. Roller coasters rely on gravity to take them to the end of the track. This involves two types of energy, potential energy and kinetic energy.
Explanation: my mom told me lol ..
Answer:
The movement of a roller coaster is accomplished by the conversion of potential energy to kinetic energy. The roller coaster cars gain potential energy as they are pulled to the top of the first hill. As the cars descend the potential energy is converted to kinetic energy.
Explanation:
That's gonna help right?
the energy of moving things are called
Answer:
Kinetic Energy
Explanation:
Energy that a moving object has due to its motion is Kinetic Energy.
Which of the following is an uncontrollable risk factor for myocardial infarction?
weight gain
age
poor diet
cigarette smoking
Motion is
displacement
an object you look at to determine if something is moving
a change of position in relation to another object
speed
Answer:
a change of position in relation to another object.
Explanation:
Motion can be defined as a change in the location (position) of a physical object or body with respect to a reference point.
This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.
A reference point refers to a location or physical object from which the motion (movement) of another physical object or body can be determined.
Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement, position, etc.
Hence, motion is a change of position in relation to another object.
Describe how an electric current flows through a conductor. ( use human being as a wire )
Answer:
human body contain 80% water and water is a good condition of current because our body fluid contain different type of salt that increase the current conductivity
When a warm air mass collides with a cold air mass, the warm air mass rises above the cold air mass leading too:
A) Sunny skies
B) Global warming
C) The formation of clouds and rain
D) Volcanic eruptions
Answer: It leads to a front. A front is.., I don't know how to explain it, so I'll add a picture. Fronts are made out of clouds and usually bring rain. So the answer is C: The formation of clouds and rain.
Explanation:
A light beam with a 70° angle of incidence travels through a medium with an index of refraction of 1.8. The light enters a second medium and has an angle of refraction of 37°. What is the index of refraction of the second medium?
Answer:
Explanation:
For refraction , the formula is
sin i / sin r = μ₂ / μ₁
where light is travelling from medium 1 to 2 having refractive index of μ₁ and μ₂ . Angle of incidence in medium 1 is i and angle of refraction in medium 2 is r .
Here i = 70°, r = 37°
μ₁ = 1.8 ,μ₂ = ?
sin70 / sin 37 = μ₂ / 1.8
.939 / .602 = μ₂ / 1.8
1.56 = μ₂ / 1.8
μ₂ = 2.81 .
The value of refraction index for the second medium will be [tex]\mu_2=2.16[/tex]
What will be the refractive index?Every material has a different refractive index. The refracted index of any material shows that the light is refracted by how much angle.
So like for water its value will be different also for glass its value will be different.
Now it is given in the question that
Angle of incidence [tex]i=70^o[/tex]
Refractive index of the first medium [tex]\mu_1=1.8[/tex]
Angle of refraction [tex]r=37^o[/tex]
Now from snells law
[tex]\dfrac{Sin \ i}{Sin \ r} = \dfrac{\mu_2}{\mu_1}[/tex]
[tex]\dfrac{Sin70}{Sin37} = \dfrac{\mu_2}{1.8}[/tex]
[tex]\mu_2= \dfrac{Sin70\times1.8}{Sin37}[/tex]
[tex]\mu_2=2.16[/tex]
Thus the value of the refraction index for the second medium will be [tex]\mu_2=2.16[/tex]
To know more about the Refractive index follow
https://brainly.com/question/10729741
Newton's second law predicts that when a nonzero net force is applied to a box, the box will
A. move at constant velocity.
B. move at constant speed.
c. accelerate.
D. do all of the above.
Answer:
C
Explanation:
this is because newton's second law states that if a resultant force acts on an object, then it will accelerate in the direction of the resultant force
so if there is a non zero resultant force, it means that there is a resultant force, so for every resultant force, there is acceleration
since the equation states it
F = ma
hope this helps
please mark
A gold bar contains 63.0 mol of gold, Au(s). How many atoms of gold are in the bar?
Answer:
63.0 x (6.02 x 10^23) = 3.79 x 10^25 atoms of gold
Explanation:
There are 6.02 x 10^23 representative particles in a mole of any substance. Multiply it by the number of moles, and you will get the number of representative particles (atoms, molecules, formula units)