Answer:
Force = 504.6 N
Explanation:
Weight, W = mg
Weight of object = 87 N
Effort length = 9.2 m
Resistance length = 3.4 m
The required length, h = Effort length - Resistance length
= 9.2 - 3.4
= 5.8 m
But,
F = mgh
= W x h
F = 87 x 5.8
= 504.6 N
The value of force required to lift the weight is 504.6 N.
why the watt is called derived unit ?
Answer:
It is because it is a unit of Power(which is a derived quantity)
Anything that is thrown or shot through the air is called a projectile. A baseball
player in the outfield throws a ball to home plate. What type of path does the projectile follow?
F. a straight line
G. a curved path upwards
H. a curved path downwards
J. a straight line downwards
Answer:
A curve path downwards
Explanation:
When the ball is thrown, it curves downwards because the earth's core is pulling it out of the sky, and alse becasue the earth is round.
Answer:
H. a curved path downwards
Explanation:
Two people are talking at a distance of 3.0 m from where you are, and
you measure the sound intensity as 1.1'10 W/m. Another student
is 4.0 m away from the talkers. Calculate a reasonable estimate for the
sound intensity that the other student measures.
A) 62' 10-8 W/m2
B) 1.5'10-7 W/m2
8.3' 10-8 W/m2
D) 7.8'10-7 W/m2
Answer:
The sound intensity that the other student measure, I₂ is expected to be;
A) 6.2 × 10⁻⁸ W/m²
Explanation:
The measure of sound intensity is given by the following formula;
[tex]I = \dfrac{P}{4 \cdot \pi \cdot R^2}[/tex]
[tex]\dfrac{I_2}{I_1} = \dfrac{R_1^2}{R_2^2}[/tex]
Where;
I = The intensity
R = The radius
P = The power of the sound
Whereby we have;
The distance of the two people talking, R₁ = 3.0 m
The measure of the sound intensity, I₁ = 1.1 × 10⁻⁷ W/m² (from an online source)
The distance of the other student from the two people talking, R₂ = 4.0 m
Therefore, the estimate of the sound intensity, I₂, is given as follows;
[tex]{I_2} = \dfrac{R_1^2}{R_2^2} \times {I_1}[/tex]
[tex]{I_2} = \dfrac{(3.0 \, m)^2}{(4.0 \, m)^2} \times 1.1 \times 10^{-7} \ W/m^2 = 6.1875 \times 10^{-8} \ W/m^2[/tex]
I₂ = 6.1875 × 10⁻⁸ W/m²
∴ The sound intensity that the other student measure, I₂ ≈ 6.2 × 10⁻⁸ W/m²
Giving Brainliest
Please help, Stay Safe and healthy
Answer: A I think
Explanation:
Derive, with full working, the symbol equation for the power output P watts of the energy transfer that occurs when a mass of m kg falls through a height of h metres in t seconds.
Write a scientific explanation about weather or not a single cell constitutes a system. (CER)
Answer:
Weather such as raining has water molecules/droplets thats been evaporated from the ocean and other areas that's wet, the water will connect and soon the mass of the water will become heavy causing rainfall. Snow in another case has been caused to freeze from low climates creating a snow flake to fall from the sky. Hail is another case however the water that becomes ice is far more larger.
The variety of activities that take place daily in our atmosphere makes up for the weather.
What is the weather like?The weather varies across the globe and changes over a few minutes, hours, days, and weeks. The troposphere, the region of Earth's atmosphere closest to the surface, is where most weather occurs.
Changes in air pressure determine the weather that occurs in a given place. The weight of the enormous quantities of air molecules that make up the atmosphere is what causes air pressure.
Usually, clear, blue skies are seen when air pressure is high. The high pressure prevents clouds from developing by causing air to flow down and fan out as it gets close to the ground.
Low air pressure causes air to move together before converging upward, where it rises, cools, and forms clouds.
To learn more about the weather, refer to the link:
https://brainly.com/question/14426457
#SPJ2
X=Y=MC scourer that would be the answer for you mam or sir
Me das mas información?
Answer:
jello
Explanation:
it jiggles
an archer shot a 0.06 kg arrow at a target. the arrow accelerated at 5,000 m/s^2 as it left the bow.
What is the force of the arrow?
Answer:
The force of the arrow was 300N.
Explanation:
5. You are running at your maximum speed of 6m/s to catch a bus which is
standing at the bus stop. The bus move off with an acceleration of 1m/s when
you are 20 m from it.
A. Can you catch the bus?
B. Show graphically.
Alkaline earth metals have a low density
true
false
true
Explanation:
this is because melting point and boiling point decreases down the group because they are held together by attractions between positive nuclei and delocalised electrons
Plzzzz help hurry plzzzzzz plzzz
Answer:
The first one is C, and the second is not clear please show another photo
Explanation:
Why do bones weaken as a person gets older
Answer:
The bones aren't as strong as a younger person, because an older person, ages due to time and it also depend on what they do in their past.
Does this help? ^-^"
If the half life of a decaying isotope is 10 years, which statement is true after 8 years
Answer:
is suppoesd to say after 20 yrs
Explanation:
A penguin swimming underwater goes 20 meters in 5 seconds. What is its average speed?
Answer:
4 meters per second
Explanation:
How does current flow in a standard DC circuit?
Changing direction at a regular frequency.
Directly to the resistor and back.
From the positive to the negative terminal.
From the negative to the positive termina
Answer:
A
Explanation:
A student is trying to demonstrate static electricity, so they rub two identical balloons with a neutral rabbit fur to give them a charge. How
do these three objects now behave when brought near to each other?
o A. They all attract each other.
OB. The balloons repel each other but attract the rabbit fur.
C. They all repel each other.
D. The balloons attract each other but repel the rabbit fur.
Answer: The balloons repel each other but attract the rabbit fur.
Brainliest pwease if I could do you any help!
˙ᵕ˙Here, both the balloons gains a negative charge through rubbing and they attracts to the neutral rabbit fur. But the balloons themselves repel each other. Hence, option B is correct.
What is static electricity ?When a material rub on a surface its electrons gets aligned and acquire a negative charge. This negative charge when comes in contact with a neutral material, the second one get partially polarized and gets attracted to the negative charge.
This flow of electrons through induced polarization is called static electricity. When the balloon are rubbed with the neutral rabbit fur and gets negatively charged by friction.
This negatively charged balloons repel each other but they induce a polarity to the neutral rabbit fur and its positive charges gets aligned with the negative charges results in electrostatic attraction.
Find more on static electricity:
https://brainly.com/question/12791045
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An incident light ray hits a plane surface at 20 degrees (hint: remember where the angle is measured from). What is the angle between the incident and reflected rays? So is it 20 degrees or 40 degrees
Answer:
[tex]40^{\circ}[/tex]
Explanation:
The incident angle is [tex]20^{\circ}[/tex] so the reflected ray will also be [tex]20^{\circ}[/tex].
The normal divides the angle between the incident and reflected ray. So, the angle between them would be
[tex]\text{Incident angle}+\text{Reflected angle}=20+20=40^{\circ}[/tex]
So, the angle between the incident and reflected rays is [tex]40^{\circ}[/tex].
Au cours d'un orage le bruit de tonnerre met 7 secondes pour parvenir aux oreilles d'un observateur _1_ à quelle distance est tombée la foudre sachant que dans l'air le son se propage à la vitesse de 340 m/s . _2_ quel est le temps mis par la lumière de l'éclair pour franchir cette distance à l'aide de chronomètre courants
Answer:
[tex]2380\ \text{m}[/tex]
[tex]7.93\times 10^{-6}\ \text{s}[/tex]
Explanation:
t = Temps mis par la foudre pour parcourir la distance = 7 secondes
v = Vitesse du son dans l'air = 340 m / s
La distance est donnée par
[tex]s=vt\\\Rightarrow s=340\times 7\\\Rightarrow s=2380\ \text{m}[/tex]
L'éclair est tombé à une distance de [tex]2380\ \text{m}[/tex]
c = Speed of light = [tex]3\times 10^8\ \text{m/s}[/tex]
Le temps est donné par
[tex]t=\dfrac{s}{c}\\\Rightarrow t=\dfrac{2380}{3\times 10^8}\\\Rightarrow t=7.93\times 10^{-6}\ \text{s}[/tex]
Le temps mis par la lumière pour parcourir la distance est de [tex]7.93\times 10^{-6}\ \text{s}[/tex].
briefly discuss university need based scholarships and explain them.
Answer: Scholarships are given to reduce the burden of finance to be payed for academics and learning.
Explanation:
The need based scholarships are given in the following matters:
1. Research based scholarships: Scholarships should be given to meritorious students to conduct research in a particular discipline.
2. Student fails to submit fees: The student if meritorious and family is not able to fees then university can either postpone the date for fees payment or can give some concession in fees or fund the student fees for a tenure. It is a kind of scholarship for meritorious students.
3. Teacher scholarships: Teachers are allowed to learn new teaching methodologies with other institutions so that they can help students to learn well. They are provided with scholarships to avail admission in those institutions.
A student pulls out his or her chair in order to sit down. The student pulls the chair 0.75 m with a force of 20 N. How much work does he or she do on the chair?
A toy car of mass 1kg moves at 2 m/s. If a 3N force is applied for 1.9 seconds. What is the cars final velocity? Answer to 1 decimal. Help fast please. I'll mark brainliest :)
Answer:
7.7 m/s
Explanation:
Initial speed=2 m/s
mv=Ft
1*v=3*1.9
v=5.7 m/s
5.7+2=7.7
If you place apiece of foil, a piece of black fabric, and a white sheet of paper all the same size in the sun for five minutes, which would absorb the most heat. Which would absorb the least heat? Briefly explain why.
What is the mass of a 50kg object in space with no gravity?
Answer:
The answer would be 0kg.
Your welcome.
At the center, 6 unmarked red balls are interspersed with 4 blue balls marked with plus signs. A green cloud with 2 concentric white lines surrounds the center, with 2 small green balls marked with minus signs on the inner white line and 2 small green balls marked with minus signs on the outer white line. How many neutrons does this atom have? 4 6 10 14
Answer:
10
Explanation:
Amu denotes for unified atomic mass.
it is mostly used to define the atom's mass and molecules.
we know that
One unit of amu is 1 ÷ 12 of the mass of a nuclide 12C
And 1 u = 1.660 538 921 × 10-27 kg
In the inside we can found that there is 10 nucleons so here the alss of the atoms would be 10 amu
Answer:
guy above me is right
Explanation:
How much force would it would be required to stop a 950kg car traveling at 30 M/S in 1.5 seconds
Answer:
28500
Explanation:
Force equation - F = m * a
F = 950 * 30
F = 28500
A 10.0 kg mass is moving with constant speed of 10.0 m/s.
a.) How much work must be done to double the speed to 20 m/s?
b.) How much work must be done to reduce its speed to 5.0 m/s?
Answer:
what is the question name
Which of these actions does NOT have a vector?
O Swinging from a wire
O Drilling a hole
O Kickig a soccer ball
O Looking to the right
Balance the following equation
K+ h20= KOH+ H2
Answer:
2K + 2h2O =2KOH + H2
(Tell me if its incorrect)
How does the wind turbine generator work?
Answer: wind pushes directly against the blades of the turbine, which converts the linear motion of the wind into the rotary motion, then it spins the generator's rotor and the harder the wind pushes, the more electrical energy can be generated.
Explanation:
Why is the sky blue? The earth is surrounded by an atmosphere.
Answer:
The blue component of the spectrum of visible light has shorter wavelengths and higher frequencies than the red component. Thus, as sunlight of all colors passes through air, the blue part causes charged particles to oscillate faster than does the red part. The faster the oscillation, the more scattered light is produced, so blue is scattered more strongly than red. For particles such as air molecules that are much smaller than the wavelengths of visible light the difference is dramatic. The acceleration of the charged particles is proportional to the square of the frequency, and the intensity of scattered light is proportional to the square of this acceleration. Scattered light intensity is therefore proportional to the fourth power of frequency. The result is that blue light is scattered into other directions almost 10 times as efficiently as red light.
