Answer:
30N is the correct answer
1. What is muscle fatigue
Water is falling from height of 84 m. If half of the energy of water is converted into heat, the increase in the temperature of the water at the bottom is:
Answer:
what are the options??? to choose the answer from?
Explanation:
Answer:
so its 0.098*C
Explanation:
Let m gram be the mass of water.
Then potential energy of water is:
P.E.=mgh
=m×980×8400
Since potential energy is converted to kinetic energy
P.E.=K.E.
K.E.=m×980×8400
Half of kinetic energy is converted into heat.
Then heat energy:
Heat energy=
2
1
×m×980×8400
Convert joule into calories
heat=
4.2×10
7
m×980×4200
=m×0.098
But heat is:
Heat=msΔT
∴msΔT=m×0.098
m×1×ΔT=m×0.098
ΔT=0.098C
Rise in temperature of water is =0.098
∘
C .
If the total force on the object is not zero, its motion will
An objects motion changes study island
Answer:
D
Explanation:
Answer:
D
Explanation:
:p
1. What is the sum of 5m and 60 cm ?
2. A boy ran 3m and stopped because he was tired, he had 55cm leave to complete the race. What is the totañ distance of the race in m and cm?
3. A drank 600 ml og milk. How much milk did she drink in litre?
4. Convert 7OA of current into KA
5. What us the product of 2mm and 0.5m
6. Convert 6km to cm
Answer:
1) 560 cm
2) 355cm, 3.55 m
3) .6 liters
4) 0.07 ka
5) 502mm
6) 600,000
The symbol used for magnetic field is: Q B F θ
Answer:
B
Explanation:
The symbol of the magnetic field is given as B.
The magnetic field is a force field.
It is a region of space where the action of the magnetic force is felt. The magnetic force is expressed as a non-contact force. One expression of this field is the geomagnetic field which covers the earth. The magnetic field can be produced by the action of the electric field.In the diagram, sonar is used to locate a sunken ship. If the sonar echo is heard after 3 seconds, how long did it take for the signal to reach the sunken ship? Why?
Answer:
1.5s
Explanation:
Given parameters:
Time taken for the echo to be heard = 3s
Unknown:
Time taken for signal to reach the ship = ?
Solution:
An echo is phenomenon that originates from wave reflection.
If the travel time of the echo is 3s, the time it takes the echo to reach the ship is half of this time.
So,
Time taken to reach the sunken ship = [tex]\frac{3}{2}[/tex] = 1.5s
If two charged objects in a laboratory are brought to a distance of 0.22 meters away from each other. What is
the force between the spheres is 4,550 N and the charge on one object is 9.9×10–5 C
Answer:
[tex]q_2=2.47\times 10^{-4}\ C[/tex]
Explanation:
The charge on one object, [tex]q_1=9.9\times 10^{-5}\ C[/tex]
The distance between the charges, r = 0.22 m
The force between the charges, F = 4,550 N
Let q₂ is the charge on the other sphere. The electrostatic force between two charges is given by the formula as follows :
[tex]F=\dfrac{kq_1q_2}{r^2}\\\\q_2=\dfrac{Fr^2}{kq_1}\\\\q_2=\dfrac{4550\times (0.22) ^2}{9\times 10^9\times 9.9\times 10^{-5}}\\\\q_2=2.47\times 10^{-4}\ C[/tex]
So, the charge on the other sphere is [tex]2.47\times 10^{-4}\ C[/tex].
Ahorse pulls a 300-kilogram carriage with a force of 4000 Newtons to the right. A frictional force of 2500
Newtons act on the carriage as the horse pulls it. What is the acceleration of the carriage?
Answer:
4700 because of 20 degree
Match the following. Match the items in the left column to the items in the right column.
1. geology
2. biology
3. molecular clock
4. sediment
5. chemistry
terms
a branch of physical science that focuses on composition, structure, properties and change of matter
dirt, pieces of rock, and the remains of living things at the bottom of oceans, seas, and lakes
a branch of earth science that focuses on the study of the rock
the study of life
a technique for estimating the age of species by comparing molecular differences between species
Answer:
geology - a branch of earth science that focuses on the study of the rock
biology - study of life
molecular clock - a technique for estimating the age of species by comparing molecular differences between species
sediment - dirt, pieces of rock, and the remains of living things at the bottom of oceans, seas, and lakes
chemistry terms - a branch of physical science that focuses on composition, structure, properties and change of matter
Explanation:
Pretty sure that's all correct. Hope this helps
A sailor pulls a crate across the deck of a ship with a rope, exerting a horizontal force of 150. N. The crate, which has a mass of 50.0 kg, accelerates at 0.0600 m/s2.
a. List the forces acting on the crate. Assume the crate is moving slow enough for air resistance to be negligible.
b. What is the net force on the crate? Be sure to include a unit and the correct number of sig figs.
c. What is the magnitude of the friction force acting on the crate? Be sure to include a unit and the correct number of sig figs.
Answer:
B
Explanation:
which of the following is a component of staying positive while competing
Answer: B - complimenting others on good plays
Explanation: Reading the first words sort of give it away when staying positive you compliment, not criticize, confront angrily, or refuse.
Answer:
B
Explanation:
Edge 2021
Elements that are what tend to be in the what state at room temperature.
Answer:
hot
Explanation:
cause the room temperature is higher
Use absolute dating in a sentence
Answer:
scientists will use absolute dating to find how old a fossil exactly is.
Answer:
So the answer is scientists will use absolute dating to actually find how old a fossil exactly is. Hope it helps!
6. What is the name of the symbol A?
What does this symbol mean when
used before another symbol in an
equation?
"at symbol"
The at sign, "at symbol", is normally read aloud as "at"; it is also commonly called the at symbol or commercial at. It is used as an accounting and invoice abbreviation meaning "at a rate of" (e.g. 7 widgets "at symbol" £2 per widget = £14), but it is now seen more widely in email addresses and social media platform handles.
Calculate the net acceleration acting on a 40 kg box being pushed across a horizontal floor. There is a 400 N normal force, a 195 N applied force, and a 55 N force of friction resisting any sliding motion. Assume g = 10 m/s ^ 2
Answer:
Net acceleration = 3.5m/s²
Explanation:
Given the following data;
Mass, m = 40kg
Normal force, Fn = 400N
Applied force, Fapp = 195N
Force of friction, Ff = 55N
Mathematically, the net force is given by the formula;
[tex] F_{net} = F_{app} - F_{f}[/tex]
Substituting into the equation, we have;
[tex] F_{net} = 195 - 55 [/tex]
[tex] F_{net} = 140 [/tex]
To find the acceleration;
[tex] F_{net} = ma[/tex]
Making acceleration "a" the subject of formula;
[tex]a = \frac {F_{net}}{m} [/tex]
[tex]a = \frac {140}{40} [/tex]
Net acceleration, a = 3.5m/s²
who is isak Njuton??
Answer:
Sir Isaac Newton was an English mathematician, physicist, astronomer, theologian, and author
Explanation:
but he is most importantly known for having formulated the theory of universal gravity
and for having invented the calculus in the mid to late 1660s
Determine the launch speed of a horizontally launched cannonball that lands 26.3
meters from the base of a 19.3 meter high cliff.
Answer:
The cannon has an initial speed of 13.25 m/s.
Explanation:
The launched cannonball is an example of a projectile. Thus, its launch speed can be determined by the application of the formula;
R = u[tex]\sqrt{\frac{2H}{g} }[/tex]
Where: R is the range of the projectile, u is its initial speed, H is the height of the cliff and g is the gravitaty.
R = 26.3 m, H = 19.3 m, g = 9.8 m/[tex]s^{2}[/tex].
So that:
26.3 = u[tex]\sqrt{\frac{2*19.3}{9.8} }[/tex]
[tex](26.3)^{2}[/tex] = [tex]u^{2}[/tex] x [tex]\frac{38.6}{9.8}[/tex]
691.69 = [tex]u^{2}[/tex] x [tex]\frac{38.6}{9.8}[/tex]
[tex]u^{2}[/tex] = [tex]\frac{691.69*9.8}{38.6}[/tex]
= [tex]\frac{6778.562}{38.6}[/tex]
[tex]u^{2}[/tex] = 175.6104
⇒ u = [tex]\sqrt{175.6104}[/tex]
= 13.2518
u = 13.25 m/s
The initial speed of the cannon is 13.25 m/s.
For a movie stunt, an empty truck with a mass of 2000 kg goes 10 m/s and runs into a stopped car of mass 1000 kg. The truck then keeps moving and pushes the car along with it.
If there are no other forces acting on this system, which best describes the results of the collision?
The collision is perfectly elastic.
Kinetic energy stays the same.
The momentum after the collision is greater than the momentum before the collision.
The speed of the combined vehicles is less than the initial speed of the truck.
Answer:
D. The speed of the combined vehicles is less than the initial speed of the truck.
Explanation:
Ik this is late
Answer: D. The speed of the combined vehicles is less than the initial speed of the truck.
Explanation:
A person standing in a canoe exerts a force of 700 N to
throw an anchor over the side. Find the acceleration of the canoe if the total mass of the canoe and the person is 100 kg.
Force = 700 N
Mass = 100 kg
Acceleration = ____?
Answer :
[tex]f \: = m \times a[/tex]
700 = 100 × a
700 / 100 = a
7 m/s² = a ✅
A cliff diver running 3.60 m/s dives out horizontally from the
edge of a vertical cliff and reaches the water below 2.00 slater. How far from the base of the cliff does the diver hit the water?
Answer: 7.20 m
Explanation:
Vinegar contains 5.00% acetic acid (by mass) and its density is 1.02g / mL
What is the mass of acetic acid, in measured grams, in 185 mL of vinegar?
The mass of acetic acid would be 9.435 grams, in 185 mL of vinegar if Vinegar contains 5.00% acetic acid (by mass) and its density is 1.02g / mL
What is density?It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.
Generally, the density of any substance is expressed by the greek symbol ρ. The density is the reciprocal of the specific volume of any substance.
.
By using the above formula for density
ρ = mass / volume
As given in the problem Vinegar contains 5.00% acetic acid (by mass) and its density is 1.02g / mL
The total mass of the vinegar
mass= ρ×volume
=1.02×185
=188.7
As given Vinegar contains 5.00% acetic acid (by mass)
the mass of acetic acid = 5×188.7/100
=9.435 gram
Thus, the mass of acetic acid comes out to be 9.435 grams
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What are one of the ways the atmosphere recycle gases through interactions with the biosphere?
Through the usage of nitrogen and release oxygen into the atmosphere from plants.
Though the process photosynthesis
O Through available sunlight and release oxygen into the atmosphere.
The mineral content in the ground that plants rely on and release carbon dioxide into the atmosphere.
Answer:
Though the process photosynthesis
Explanation:
One of the important ways by which the atmosphere recycle gases through interactions with the the biosphere is by photosynthesis.
The biosphere is the living component on the earth. The atmosphere is the gaseous envelope round the earth.
Photosynthesis is the process whereby green plants manufacture their food using carbon dioxide and water in the presence of sunlight to produce glucose and oxygen gas. This way, atmospheric carbon dioxide is exchanged for oxygen gas.This way, there is a sustained interaction between the atmosphere and biosphere.
Answer:
B. Through the process photosynthesis
Explanation:
:)
is current was invented
One of the most important discoveries relating to current was made accidentally by Hans Christian Ørsted in 1820, when, while preparing a lecture, he witnessed the current in a wire disturbing the needle of a magnetic compass.
Explanation:
One of the most important discoveries relating to current was made accidentally by Hans Christian Ørsted in 1820, when, while preparing a lecture, he witnessed the current in a wire disturbing the needle of a magnetic compass.
Joel the firefighter, standing 45 m from a burning building, directs a stream of water from a ground level fire hose at an angle of 25 degrees above the horizontal. The Vi of the stream as it leaves the hose is 55 m/s. What is the water’s Vix?
An object with a mass of 1500kg accelerates 10.0m/s when unknown force is applied to it. What is the amount of force?
Answer:
The answer is 15000 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 1500 × 10
We have the final answer as
15,000 NHope this helps you
Answer:
15000 N
Explanation:
Which diagram represents a closed circuit with the least resistance?
Answer:Circuit B is the answer
Explanation:
The diagram B represents a closed circuit with the least resistance. Hence, option (C) is correct.
What is electrical circuit?Electric current travels along a circuit to be transmitted. A battery or generator, a device that provides energy to the charged particles that make up the current, a device that uses current, such as a lamp, an electric motor, or a computer, and the connecting wires or transmission lines make up an electric circuit.
Ohm's law and Kirchhoff's rules are two fundamental laws that quantitatively define how electric circuits function.
In diagram A, there has two external resistance.
In diagram B, there has no external resistance.
In diagram C, there has two external resistance.
In diagram D, there has three external resistance.
Hence, the diagram B represents a closed circuit with the least resistance.
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Because of a frictional force of 2.6 N, a force of 2.8 N must be applied to a
textbook in order to slide it along the surface of a wooden table. The book
accelerates at a rate of 0.11 m/s?.
a. What is the unbalanced force on the book?
b. What is the mass of the book?
(a) The unbalanced force will be "0.2 N".
(b) The mass of book "1.818 kg".
Unbalanced force and mass:Given:
Applied force = 2.8 NFrictional force = 2.6 NAcceleration = 0.11 m/s²(a) Total unbalanced force,
→ [tex]F_{net} = 2.8-2.6[/tex]
[tex]= 0.2 \ N[/tex]
(b) By applying Newton's second law,
→ [tex]F = ma[/tex]
or,
→ [tex]m = \frac{F_{net}}{a}[/tex]
By substituting the values,
[tex]= \frac{0.2}{0.11}[/tex]
[tex]= 1.818 \ kg[/tex]
Thus the above approach is correct.
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What is the dependent variable for the following experiment?
Kim notices that Brad's Bread does not mold after a week in an open bag. Walter's Wonderful White produces a layer of black "fur" in the same length of time in its
open bag
O Amount of time
Type of bread
Amount of mold
Open bag
Answer:
Amount of mold
Explanation:
the dependent variable depends on the independent variable. the amount of mold changes if the bread is opened or not. the independent variable is what can change.
A 2300 kg sailboat is moving west at 5.5 m/s when an eastward wind
applies an average force of 950 N to is sail for 11.5 s. What is the speed
and direction of the boat after this force?
The boat is initially at equilibrium since it seems to start off at a constant speed of 5.5 m/s. If the wind applies a force of 950 N, then it is applying an acceleration a of
950 N = (2300 kg) a
a = (950 N) / (2300 kg)
a ≈ 0.413 m/s²
Take east to be positive and west to be negative, so that the boat has an initial velocity of -5.5 m/s. Then after 11.5 s, the boat will attain a velocity of
v = -5.5 m/s + a (11.5 s)
v = -0.75 m/s
which means the wind slows the boat down to a velocity of 0.75 m/s westward.