Answers
Answer:
4. The reading decreases because part of your weight is applied to the table and the table exerts a matching force on you that acts in the direction opposite to your weight.
Explanation:
When you push on anything, Newtons Third Law comes into effect: "when two objects interact, they apply forces to each other of equal magnitude and opposite direction." So pretty much, the table you are putting some of your weight on is taking some of the downward force and in return the scale isn't going to push up with as much force.
I'm not the best at explaining, but im in physics right now and thats somewhat how my teacher explained it.
Related Questions
Hi, why do waves with longer wavelengths travel further than waves with shorter wavelengths?
Answers
Answer:
ones longer than the other daa
Explanation:
Answer:
well, because of the moon!
Explanation:
you see, the moon is what controls the waves. waves are most commonly caused by wind. wind-driven waves, or surface waves, are created by the friction between wind and surface water. as wind blows across the surface of the ocean or a lake, the continual disturbance creates a wave crest. the gravitational pull of the sun and moon on the earth also causes waves. so when the gravitation pull is weak, it creates the shorter wavelengths. without a stong pull, they don't go as far. when the pull is strong, the waves with longer wavelengths go further.
A 13.3 kg box sliding across the ground
decelerates at 2.42 m/s2. What is the
coefficient of kinetic friction?
(No unit)
Answers
Answer:
0.25
Explanation:
According to newtons law of motion
\sum F_x = ma
F_f = ma
nR = ma
nmg = ma
ng = a
n = a/g
g is the acceleration due to gravity
Given
a = 2.42m/s²
g = 9.8m/s²
Substitute into the formula;
n = 2.42/9.8
n = 0.25
Hence the coefficient of kinetic friction is 0.25
Answer:
0.247
Explanation:
I had the same question and this is the correct answer.
how much kinetic energy does a 2500kg minivan traveling at 35m/s have?
Answers
Answer:
Formular of kinteic energy is 0.5 × (mass x velocity)²
0.5 × 2500 kg × 35² =1,531,250 jules
Compare and contrast a gas and a solid.
19 points ??? ASAP
Answers
Answer:
Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Explanation:
gases are well separated with no regular arrangement.
solid are tightly packed usually in regular
pattern.
A car is driving on the road. The car starts to decelerate at -3 m/s2. It stops moving after 125
meters. How fast was the car going initially?
Answers
Answer:
27.39 m/s
Explanation:
From the question given above, the following data were obtained:
Deceleration (a) = –3 m/s²
Distance (s) = 125 m
Final velocity (v) = 0 m/s
Initial velocity (u) =?
The initial velocity (u) of the car can be obtained as follow:
v² = u² + 2as
0² = u² + (2 × –3 × 125)
0 = u² + (– 750)
0 = u² – 750
Collect like terms
0 + 750 = u²
750 = u²
Take the square root of both side
u = √750
u = 27.39 m/s
Thus, the initial velocity of the car was 27.39 m/s
A car travels at a constant speed of 40 miles per hour down the street for around 0.25 hours. What is its acceleration?
Answers
Answer:
55
Explanation:
was moving at 25 miles per hour
The moon has a mass of 7.35x1022 kg and is a lot farther away than is shown in textbooks. The mass of the
Earth is 5.98 x 1024 kg. The moon's mean orbit distance (center-to-center) around the earth is 3.84
x10 m.
8. Using this information, determine the gravitational force exerted on the moon by the Earth.
Answers
Answer:
[tex]F=1.98\times 10^{20}\ N[/tex]
Explanation:
Given that,
The mass of a Moon, [tex]M_m=7.35\times 10^{22}\ kg[/tex]
The mass of the Earth, [tex]M_e=5.98\times 10^{24}\ kg[/tex]
The moon's mean orbit distance around the earth is, [tex]r=3.84\times 10^8\ m[/tex]
We need to find the gravitational force exerted on the moon by the Earth.
The formula of gravitational force is given by :
[tex]F=G\dfrac{M_mM_e}{r^2}\\\\F=6.67\times 10^{-11}\times \dfrac{7.35\times 10^{22}\times 5.98\times 10^{24}}{(3.84\times 10^8)^2}\\\\F=1.98\times 10^{20}\ N[/tex]
So, the required force is [tex]1.98\times 10^{20}\ N[/tex].
What is the difference in
momentum between an 87.2 kg
football player running 2.87 m/s and
a 0.0520 kg bullet moving 789 m/s?
Answers
209.236 kg · m/s
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightPhysics
Momentum
Momentum Formula: P = mv
P is momentum (in kg · m/s)m is mass (in kg)v is velocity (in m/s)Explanation:Step 1: Define
m₁ = 87.2 kg
v₁ = 2.87 m/s
m₂ = 0.0520 kg
v₂ = 789 m/s
Step 2: Find Momentums
Football Player
Substitute [MF]: P = (87.2 kg)(2.87 m/s)Multiply: P = 250.264 kg · m/sBullet
Substitute [MF]: P = (0.0520 kg)(789 m/s)Multiply: P = 41.028 kg · m/sStep 3: Find difference
Define equation: P₁ - P₂Substitute: 250.264 kg · m/s - 41.028 kg · m/sSubtract: 209.236 kg · m/sAnswer:
209.236
Explanation:
Order of Operations: PEMDAS
"Please excuse my dear Aunt Sally"
Parentheses, exponents, multiplication, division, addition and subtraction
First use p=mv
Player:(plug in the data)
= 87.2*2.87
= 250.264
Bullet : (do the same)
Then subtract Bullet-Player =209.236
If a crane lifts a load of 75N to a height of 20m in 100s, what is the power of the crane?
Answers
Answer:
P = 15 [W]
Explanation:
Power is defined as the relationship between work over a certain time.
In this way we must calculate the work which is defined as the product of force by distance.
[tex]W=F*d\\W=75*20\\W=1500[J][/tex]
And the power.
[tex]P=W/t\\P=1500/100\\P=15[W][/tex]
Power given in units of watts.
PLEASE HELP! Need this ASAP (in 10 minutes)
What happens to the speed (velocity) of a sound wave if the frequency decreases? (Assume the wavelength is constant.)
A. The speed is unchanged.
B. The speed quickly increases and then stops.
C. The speed increases.
D. The speed decreases.
Answers
(I am dragging a very helpful piece of information from a website call “The Physics Classroom” for an explain took by the way so go check them out if you are still having trouble.)
From the paragraph I read, I could pull out “The data convincingly show that wave frequency does not affect wave speed.”
Thus concluding my answer of why the speed is unchanged.
A car travelling at 10 m/s accelerates at 3 m/s^2 for 6 seconds. What is the final velocity of the car?
Answers
Answer:28m/s
Explanation:I got one point so yeah hope this help
When a car traveling at 10 m/s accelerates at 3 meters/ second² for 6 seconds, then the final velocity of the car would be 28 meters per second.
What are the three equations of motion?There are three equations of motion given by Newton
v = u + at
S = ut + 1/2×a×t²
v² - u² = 2×a×s
As given in the problem, a car traveling at 10 m/s accelerates at 3 m/s^2 for 6 seconds,
the initial velocity of the traveling car = 10 m/s
time = 6 seconds,
acceleration = 3 meters/ second²
With the help of the first equation of the motion, we can calculate the final velocity of the car,
v = u + at
v = 10 + 3*6
v = 28 m/s
Thus, the final velocity of the car would be 28 meters per second.
Learn more about equations of motion from here,
brainly.com/question/5955789
#SPJ2
If the distance between two objects is increased by a factor of 3 (tripled), how will this affect Fg?
1. F g increases by 9 times
2. F g decreases to 1/9
3. F g increases by 3 times
4. F g decreases to 1/3
Answers
Answer:
2. F g decreases to 1/9
Explanation:
The formula for calculating the Force of gravity between two masses separated by a distance is expressed as;
F = GMm/d² ... 1
If the distance is tripled, the new force will be;
F1 = GMm/(3d)²
F1 = GMm/9d² ... 2
Divide equation 1 by 2
F/F1 = GMm/d²÷GMm/9d²
F/F1 = GMm/d²×9d²/GMm
F/F1 = 1 * 9
F = 9F1
F1 = 1/9 F
This means that the new force decreases to 1/9
Picture is down below Thank you!
Answers
Hopefully I helped
Answer:
The answer is 45 N to the right.
Explanation:
To find the answer add 25 N and 20 N to get 45 N.
Which of the following will result in the highest conductance?
large cross-sectional area, short pipe
small cross-sectional area, long pipe
small cross-sectional area, short pipe
large cross-sectional area, long pipe
Answers
Answer:
The highest conductance results from;
Large cross-sectional area, short pipe
Explanation:
The conductance, G, of a material is a measure of the rate or ease of electricity conduction of the material
[tex]The \ conductance \ G = Current/(Potential \ difference) = \dfrac{I}{V} =\dfrac{1}{R} = \dfrac{A}{\rho \cdot l}[/tex]
Where;
I = The current
V = The voltage (Potential difference)
R = The resistance
A = The cross-sectional area of the conductor
L = The length of the conductor
ρ = The resistivity of the conductor
Therefore, "G" is directly proportional to "A" ang "G" is inversely proportional to "l" from which we have that as the cross-sectional area increases the conductance increases and as the length of the pipe decreases the conductance increases.
The highest conductance is given by a large cross-sectional area and a short pipe.
Answer:
Large cross-sectional area, short pipe
Explanation:
A car with a mass of 833 kg rounds an unbanked curve in the road at a speed of 28.0 m/s. If the
radius of the curve is 105 m, what is the centripetal force exerted on the car?
Answers
The _____ deflects these winds to the right in the northern hemisphere and to the Southern Hemisphere
Answers
Answer:
Coriolis Effect
Explanation:
The Coriolis effect is responsible for the deflection of winds to the right in the Northern hemisphere and to the right in the Southern hemisphere. It is an effect that occurs because of the rotation of the earth around its axis.
The implication of this is that in areas of low pressure in the Northern hemisphere, winds tend to blow in anticlockwise direction, and in areas of high pressure, it blows in a clockwise direction. The opposite of this happens in the Southern hemisphere.
A 100.0 kg safe is pushed across a floor with a force of 450 N. The coefficient of kinetic friction is 0.35. What is the acceleration of the safe?
Answers
Answer:
1.07m/s²
Explanation:
From the question we are given the following
applied force Fapp = 450N
mass of the safe m = 100kg
Weight of the safe W = 980N
coefficient of kinetic friction n = 0.35
Required
Acceleration of the safe
According to Newton's second law
\sum Fx = ma
Fapp - Ff = ma
Ff is the frictional force
Fapp - nmg = ma
450 - 0.35(100)(9.8) = 100a
450 - 343= 100a
107 = 100a
a = 107/100
a = 1.07m/s²
Hence the acceleration of the safe is 1.07m/s²
An airplane is traveling from North Africa to England. Which arrow correctly shows the direction gravity pulls the plane?
(A) 1
(B) 2
(C) 3
(D) 4
Answers
Given that,
The attached figure shows an airplane is traveling from North Africa to England.
To find,
The arrow that shows the direction gravity pulls the plane.
Solution,
The force of gravity always acts in the downward direction, The weight of an object is given by :
W = mg
Arrow 2 shows the direction of gravitational pull.
Answer:
2 or B
Explanation:
What is the difference between liquid water and water vapor?
A.) They have different arrangements of atoms in their molecules.
B.) They differ in their number and types of atoms.
C.) They are different states of the same pure substance.
D.) They are different types of chemical compounds.
Answers
Answer:
C
Explanation: Water vapor can turn into liquid water when it cools and Liquid water turns into vapor when it heats
A bulldozer uses a 500 N force to push a load of dirt 16 m to the worksite. How much work
does the bulldozer perform?
Answers
Explanation:
Force (F) = 500 N
Distance (d) = 16 m
work done (w) =?
We know that
w = F * d
= 500 * 16
= 8000 Joule.
The bulldozer performs 8000 Joule.
Hope it will help you :)❤
Is this statement true or false?
There are SEVEN days between a NEW MOON and a FIRST QUARTER MOON.
If its false than how many days are between a new moon and a first quarter moon?
Answers
Answer:True
Explanation:there are approximately 29.531 on the new moon and and 7.31 I think for the first quarter then it’s 7 days between them if u calculate their sped that light travels and that number it might be the same but the statement is true not false
Answer:
The full cycle of moon phases averages 29.531 days. A quarter of that is 7.38 days. So "7 days" is a pretty good approximation for casual conversation. It's true.
Explanation:
uh i think that was my explanation soooooo like yall have a good day and if you are working at 1am just know it is not gonna be so hard one day it is gonna get better hehe
2 forces that oppose motion?
Answers
Answer:
gravity and friction
Explanation:
Lauren is comparing rocks from two different locations. She has the following
information about the rocks:
Rock A formed from small pieces of rock.
Rock B formed from liquid rock in a different place.
Rocks A and B formed at about the same time.
Are Rocks A and B the same or different types of rock?
.
The rocks are
Answers
Answer:
the same type because they both formed from rock material.
Explanation:
The rocks which are formed from small pieces of rocks are called sedimentary rocks whereas, the rocks formed from the liquid rocks or molten fluid rock, they are called igneous rocks. Hence, A rock A and B are of different types.
What is sedimentary rocks?There are broadly three types of rocks namely sedimentary rocks , igneous rocks and metamorphic rocks. These rocks can be interchanged to another forms through the process called rock cycle.
Sedimentary rocks are formed near the earth surface and which are deep within the earth. Sedimentary rocks are composed many small pieces of rocks. Thus the rock A is sedimentary rock.
Igneous rocks are formed by the crystallization of molten magma after cooling. These magma are developed underground in the upper mantle. Magma becomes hot by the convection current and it flow making the nearby plates to move. When it cools, it solidifies to form igneous rocks. Thus, rock B is igneous type.
To find more on igneous rocks, refer here:
https://brainly.com/question/23555197
#SPJ5
a moving truck takes a much longer time to stop than that taken by a car when brakes are pressed at the same time
Answers
The magnitude of inertia depends on the mass of the body.
What is inertia?The term inertia has to do with the degree of resistance to motion. We know that an object will continue in its state of rest or uniform motion unless it is acted upon by an external force.
The magnitude of inertia depends on the mass of the body. Since the truck is more massive than the car, it follows that a moving truck takes a much longer time to stop than that taken by a car when brakes are pressed at the same time.
Learn more about inertia:https://brainly.com/question/3268780
#SPJ1
A planet's rotation determines the length of its day and its revolution determines the length of its year. A day on Earth is 24 hours and a year on Earth is 365 days. In contrast to Earth, a day on Venus is longer than a year on Venus. Which is the best reason for why this is so?
Answers
Explanation:
The speed of rotation of Venus is slower than that of Earth that is why a day on Venus is longerthan Earth's day. Whereas, Venus is closer to sun than Earth, this means Venus trajectory of revolution is smaller than that of Earth.Therefore, a year on Venus is shorter than Earth's year.
HELP!!
8. The speed that the car is going at an instant of time is called the (5 points)
average speed
final speed
initial speed
instantaneous speed
Answers
Answer:
the speed that the car is going at an instant of time is called the instantaneous speed.
Hope this helps.
1. Aling lalawigan ng rehiyon ang napapaligiran ng mga bundok?
A. Cavite B. Batangas C. Laguna D. Quezon
Answers
B.batangas po
Explanation:Yan Lang po Ang Alam ko
Which of these metals are magnetic?
Answers
Copper is not magnetic
Steel is magnetic
Nickel is magnetic
Tin is magnetic
Aluminum is not magnetic
True or false?
There is no
difference
between speed
and velocity
Answers
Answer:
False
Explanation:
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
Which action is not an example of work?
picking up a box off the floor
pushing a box across the floor
holding a tray in the cafeteria line
raising a barbell over your head
Answers
Answer:
option 3
Explanation:
work is said to be the ability to move an object from it initial position. therefore, holding a tray is not a work
Answer:
C
Explanation: