HELP BRAINLIEST!!! I NEED HELP NOW
Answer:
1 kg at 1 m/s
Explanation:
less weight to propell it forward
Kiran's mother placed a candle in the bowl as shown and lit it . A little while later , kiran opened a bottle of pepsi and poured it quickly into the bowl .What will happen ?
Answer:
The candle stick flame will burn brighter.
Explanation:
I majored in Physics.
A ship
a sound
wave
sends
straight
to the sea bed and receves the echo
1.5 seconds later. The speed of sound in
water
How deep is the
at that place?
collin
is 1500 m/s.
Sea
sea
Answer:
The sea bed is 1125 m deep.
Explanation:
Speed
It's the rate of change of the distance (d) traveled by an object over time (t).
The speed can be calculated by the formula:
[tex]\displaystyle v=\frac{d}{t}[/tex]
It's known the speed of sound in water is v=1500 m/s. A sound wave is sent to the sea bed and bounces back to the ship 1.5 seconds later.
That is the time the wave takes to travel twice the distance from the ship to the sea bed, thus the required distance uses half of that time or t=1.5/2 = 0.75 seconds.
Solving the equation for d:
d = v.t
d = 1500 m/s * 0.75 s
d = 1125 m
The sea bed is 1125 m deep.
HELP ME PLEASE!!!!!! A couch is pushed with a force of 79 N and moves a distance of 7 m across the floor. How much work was done in moving the couch?
The volume of an irregular object can be measured by
a. multiplying the object’s length, width, and height.
b. multiplying the object’s density by its mass.
c. submerging the object in water in a graduated cylinder.
d. placing the object on a triple-beam balance.
When illuminated with monochromatic light, a double slit produces a pattern that is a combination of single-slit diffraction and double-slit interference. This can be easily seen if the separation between the slits and the size of slits are related by simple fractions. Find the ratio of the width of the slits to the separation between them, if the first minimum of the single slit pattern falls on the fifth maximum of the double slit pattern.
Answer:
The ratio is [tex]k:d = 1 : 5[/tex]
Explanation:
From the question we are told that
The first minimum of the single slit pattern falls on the fifth maximum of the double slit pattern.
Generally the condition for constructive interference for as single slit is
[tex]ksin(\theta) = n\lambda[/tex]
Here k is the width of the slit and n is the order of the fringe and for single slit n = 1 (cause we are considering the first maxima)
Generally the condition for constructive interference for as double slit is
[tex]dsin\theta = m\lambda[/tex]
Here d is the separation between the slit and m is the order of the fringe and for double slit m = 5 (cause we are considering the first maxima)
=> [tex]dsin\theta = 5\lambda[/tex]
So
[tex]\frac{ksin(\theta)}{dsin(\theta)} = \frac{\lambda}{5\lambda}[/tex]
=> [tex]\frac{k }{d} = \frac{1}{5}[/tex]
So
[tex]k:d = 1 : 5[/tex]
what mass of lead has the same volume as 1600 of alcohol ( density of lead =11300kg\m³ and density of alcohol=790kg\m³)
The mass of lead = 22,939 kg
Further explanationGiven
mass alcohol=1600 kg
The density of lead =11300kg\m³ and density of alcohol=790kg\m³
Required
mass of lead
Solution
volume of alcohol[tex]\tt V=\dfrac{mass}{\rho}\\\\V=\dfrac{1600}{790}\\\\V=2.03~m^3[/tex]
the volume of lead=volume of alcohol=2.03 m, so the mass of lead :
[tex]\tt m=\rho\times V\\\\m=11300\times 2.03\\\\m=22,939~kg[/tex]
What is the total force of an object which has a mass of 150kg and is accelerating at 2m/s/s?
Answer:
[tex]\boxed {\boxed {\sf 300 \ Newtons }}[/tex]
Explanation:
Force can be found by multiplying the mass by the acceleration.
[tex]F=ma[/tex]
The mass is 150 kilograms and the acceleration is 2 meters per second per second, or 2 meters per square second.
[tex]m= 150 \ kg \\a= 2 \ m/s^2[/tex]
Substitute the values into the formula.
[tex]F= 150 \ kg * 2 \ m/s^2[/tex]
Multiply.
[tex]F= 300 \ kg*m/s^2[/tex]
We know that 1 kilogram meter per square second is equal to 1 Newton. Therefore our answer of 300 kg*m/s² is equal to 300 N[tex]F= 300 \ N[/tex]
The force of the object is 300 Newtons.
Given an objects momentum and velocity which equation can be used to calculate the objects mass
A cyclist travels at 7 m/s and has a mass of 75 kg. Calculate the kinetic energy of the
cyclist.
3,675 )
262.5
1,837.5)
525 )
Answer:
1837.5 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 75 \times {7}^{2} \\ = 37.5 \times 49 \\ = 1837.5[/tex]
We have the final answer as
1837.5 JHope this helps you
What is the unit for work? watt joule newton meter
Answer:
Joule
Explanation:
Joule is the SI unit of work or energy.
Answer:
joule
Explanation:
edge2020
A chunk of ice with a mass of 1.2 kg melts and absorbs 3.33 x 10³J of energy. Which best describes what has happened in this system?
Answer:
- Its entropy increases.
Explanation:
Entropy is defined as a 'measure of the amount of energy in a physical system that cannot be used to do work.' It is also employed to denote randomness, disorder, or uncertainty of the arrangement/system. In the given system, the melting of ice denotes the 'increase in entropy' as the amount of energy unavailable to do work increases('absorbs 3.33 x 10³J of energy'). Thus, this signifies that the entropy increases with a rise in temperature as it allows the substance to have greater kinetic energy.
Does a soccer ball on the ground have energy
Answer:
No
Explanation:
The ball dose not have any kinetic energy or potential. Nothing is in motion or stored.
Help? anyone? plz?
What was the atmosphere most heated by?
radiation
conduction
wind
convection
Answer:
Explanation:
The answer is radiation.
PLEASE HELP MEEEE
marking brainliest
Answer:
Option C
Explanation:
Centripetal acceleration formula regarding velocity and radius is,
[tex]a_c=\frac{v^2}{r}[/tex]
now we know the centripetal acceleration is 9 and the radius is 16 so we plug these values into our formula,
[tex]a_c=\frac{v^2}{r}\\\\9=\frac{v^2}{16} \\\\144=v^2\\\\\sqrt{144}=v \\\\v=12\ m/s[/tex]
so velocity is 12 m/s
Now for the angular velocity, the formula of centripetal acceleration regarding angular velocity and radius is,
[tex]a_c=rw^2[/tex]
we know the centripetal acceleration is 9 and the radius is 16 so plug these values into the formula,
[tex]a_c=rw^2\\\\9=16w^2\\\\0.5625=w^2\\\\\sqrt{0.5625}=w \\\\0.75\ rad/s=w\\[/tex]
so angular velocity is 0.75 rad/s
Describe binary fission with amoeba.
Activity that is equivalent to brisk walking in intensity is considered to be _______________ physical activity. *
vigorous
light
moderate
Answer:
moderate
Explanation:
because light would be walking casually while vigorous would be sprinting or something like that
An object is in free fall. After 10 seconds calculate the distance fallen? *
A diver jumps off a 60 m cliff with an initial horizontal velocity of 3m/s. Find the time needed to reach water?
Answer:
9.81 × 10 = 98.1 meters
vertical displacement is s=1/2 at^2 + vt
initial vertical velocity is 0 so s=1/2 at^2
a in this instance is gravitational acceleration so 60m= 1/2 (9.81)t^2
solve for t, t = 3.497s. //I corrected this answer as just now I misread horizontal as vertical.
*For free fall,
Initial velocity (u) = 0
g = 9.8m/s²
time(t) = 10s
Using the second equation of free fall;
s = ut + 1/2gt²
where 's' is the distance fallen.
s = 0(10) + 1/2(9.8)(10)²
s = 1/2(9.8)(100)
s = 490m.
*Initial horizontal velocity (Ux) = 3m/s
Initial vertical velocity (Uy) = 0
since it did not start with any vertical velocity.
Using the second equation of vertical downward motion:
h = Uyt + 1/2gt²
where h is the height of the cliff = 60m.
g = 9.8m/s²
60 = 0(t) = 1/2 (9.8)(t²)
60 = 4.9t²
t = √(60/4.9) = 3.5s.
1.) How much potential energy does an object with a mass of 3 kg have on top of a stand 12 meters
high have on earth with a gravitational acceleration of 9.8 m/s, assuming no air friction?
a.) 3.673 Joules
b.) 352.8 Joules
c.) 39.2 Joules
d.) 2.45 Joules
Answer:
352.8 JoulesExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
PE = 3 × 9.8 × 12
We have the final answer as
352.8 JHope this helps you
Levi decides to examine the effect of fertilizer on the growth of tomato plants. He chooses four plants for his experiment and applies varying amounts of fertilizer to the three of them. He does not apply fertilizer to one plant.
Over a 15-day period, the plants receive fertilizer on Days 1, 4, 7, 10, and 13. Levi measures the height of all of his plants with a meter stick on Days 3, 6, 9, 12, and 15. He also makes sure to hold all experimental factors constant except for the fertilizer.
Which statement describes what Levi did to prepare the control group in his experiment?
Levi applied different amounts of fertilizer to three of his plants.
Levi did not apply any fertilizer to one of his plants..
Levi held all experimental factors constant except for fertilizer., ,
Levi measured his plants on five separate days.
Answer:
Levi did not apply any fertilizer to one of his plants..
Explanation:
In an experiment, there are two major groups namely: control group and experimental group. Control group is the group in an experiment that does not receive the experimental treatment i.e. the group which the independent variable is not applied to.
In this case, Levi is trying to examine the effect of fertilizer on the growth of tomato plants where he used varying amounts of fertilizer on three of the four plants he used for the experiment. The fourth plant did not receive any amount of fertilizer, which is the independent variable (variable being manipulated or changed). This means that Levi prepared the control group in his experiment by NOT APPLYING ANY FERTILIZER TO ONE OF HIS PLANTS.
The ______________ is a very strong north westerly air current encircling the Earth causing the cold fronts to come down into the United States during the winter. *
10 points
sea breeze
land breeze
climate
weather
ocean current
conduction
Gulf Stream
Jet Stream
hurricane
wind*
Answer: it's wind
Explanation:
What happens to electrical energy that is used by objects in our homes? (1 point) a It is absorbed by batteries. b It is destroyed. c It is stored in solar panels. d It is transformed into other forms of energy.
Question:
What happens to electrical energy that is used by objects in our homes? (1 point)
a It is absorbed by batteries.
b It is destroyed.
c It is stored in solar panels.
d It is transformed into other forms of energy.
Answer:
D
d. It is transformed into other forms of energy.
When electrical energy is used by objects in our homes, it is transformed into other forms of energy depending on the specific device or appliance. For example:
In light bulbs, electrical energy is transformed into light energy and heat energy.In an electric heater, electrical energy is transformed into heat energy to warm the surroundings.In a blender, electrical energy is transformed into mechanical energy to blend food.In a fan, electrical energy is transformed into mechanical energy to create air movement.This transformation of electrical energy into other forms is governed by the principles of conservation of energy, which state that energy cannot be created or destroyed, only converted from one form to another. So, while electrical energy is consumed and "used up" by the devices in our homes, it is not destroyed but rather converted into different forms of energy that serve various purposes.
To learn more about electrical energy, here
https://brainly.com/question/16182853
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QUICKLY I AM IN THE LESSON NOWWW
So I need you to write a hypothesis about finding and marking stars on "Worldwidetelescope", I dont know how to start a hypothesis and a paragraph about what I did in this project. I know what I did but someone have to help me with the hypothesis and how to start the paragraph and please make a list of everything it should include, Thank you!!
Answer:
I don't really know much about the whole stars thing, but I've written a lot of paragraphs in science
Explanation:
Remember:
A paragraph should be in CER formation: Claim (hypothesis/discovery), Evidence, and ReasoningYour reasoning should never start with I believe or I think, your reasoning and evidence are 100% fact basedThe actual hypothesis should only be 1-2 sentences and be straight to the pointInclude:
for your hypothesis, keywords relating to your subject, I'm assuming for your topic you should include things like marking, telescope, stars, etc.why you believe your hypothesis is true so use prior knowledge to justify your hypothesisAn object falls freely from rest through a vertical distance off 44.0m in a time of 3.0s. What value should be quoted for the acceleration of free fall?
Answer:
9.8m\sec
Explanation:
free falling neglecting the air drag so its acceleration will be the acceleration due to gravity
Explain how water waves are not purely transverse waves
Answer:
Water waves are an example of waves that involve a combination of both longitudinal and transverse motions. As a wave travels through the waver, the particles travel in clockwise circles. The radius of the circles decreases as the depth into the water increases.
Explanation:
A circuit constructed on a circuit board is shown below.
Which of the following schematic circuits correctly represents the circuit shown?
Answer:
see attached
Explanation:
The drawing shows a battery connected to two lamps in series. There is no switch in the circuit. The schematic below reflects this.
Someone help me please.
Describe how could you use an electromagnete to sort a mixture of iron and copper pieces into two seprate piles of iron and copper
Answer:
Electromagnetic cranes are used to separate copper from iron in a scrap yard. The current is switched on to energies the electromagnet and pick up the iron pieces from the scrap. Then these iron pieces are moved to another position, the electromagnet in switched off and the iron pieces are released.
Explanation:
How can you warm up for baseball?
If you count one by one till 100 in 1 minute, how long does it take to count till 1 billion? Convert your answer to seconds, hours, years.
Answer:
Probably like around 30 - 35 years, 100-250 days and 7-14 hours
Explanation: