Answer:
The frictional force on the block is 118 N.
Explanation:
Given;
horizontal force applied on the block, f = 80 N
mass of the block, m = 20.0 kg
coefficient of friction, μ = 0.6
The frictional force on the block is calculated as;
F = μR
F = μ(mg)
F = 0.6(20 x 9.81)
F = 117.7 N
F = 118 N.
Therefore, the frictional force on the block is 118 N.
A ball falls from a tower
a) The two forces acting on the tennis ball are equal and opposite. What is the resultant force
?acting on the ball
Answer:
Zero
Explanation:
The resultant force acting on the ball would be zero.
Since only two forces were acting on the tennis ball and these forces negate and cancel each other in magnitude, the resultant effect on the tennis ball would be zero.
Assuming that one of the forces is 5N and acting from the positive side and the other force is also 5N but acting from the negative side.
Resultant = -5 + 5 = 0 N
A car traveled 1,215 km West from El Paso to Dallas in 13.5 hours. What was its velocity?
A. 90m/s West
B. 90km/h
C. .09km/h West
D. 90km/h West
The accepted value for the free-fall acceleration on Earth's surface is 9.80665 m/s2
Which of the following measurements is the most accurate?
Answer:
The Answer is A 9.80860 m/s²
Explanation:
Which of the following is NOT a criteria for a celestial object to be a planet?
-The object has cleared the neighborhood around its orbit of smaller objects.
-The object is in orbit around the Sun.
-The object has a nearly spherical shape.
-The object must be massive enough have a gravitational pull on the sun.
Answer:
The option which is not a criteria for a celestial object to be a planet is;
The object must be massive enough have a gravitational pull on the Sun
Explanation:
There are three criteria for a celestial object to be classified as a planet including;
1) The object's orbit is around the Sun
2) The shape of the object is nearly round due to its mass which is capable of assuming hydrostatic equilibrium
3) Other smaller objects in the neighborhood around the object has been cleared by the object
Therefore, the option which is not a criteria for a celestial object to be a planet is that it must be massive enough to have a gravitational pull on the Sun as every two objects in the Universe share a common gravitational pull according to Newton's Law of Gravitation.
A student squeezes a clothespin 82 times in a minute. Then, using the same hand and the same clothespin, he squeezes the clothespin 68 times in a minute. State one biological reason for the decrease in the number of squeezes during the second trial.
Answer:
The student squeezed the clothespin less the second time because the muscles in his hand began to fatigue
Explanation:
Which idea did Ptolemy's model use to explain why the planets appeared to move backward as they moved in their orbits? The planets spun in epicycles. The planets rotated on their axes. The planets revolved around the Sun. The planets were made of different materials.
Answer:
The planets spun in epicycles.
Explanation:
The planets were not simply attached to a mystical sphere (“deferent”) but they were actually attached to a mini-sphere (“epicycle”) which rotated on the larger one.
Answer:A
Explanation:
The
of a wave is the amount of time it takes one wavelength to pass a point.
What is catching a pass in football called
1.Reception
2.mossed
3.Grab
4.odel Beckham
PLEASE ANSWER ILL GIVE BRAIN!!!
Answer:
what's the question?........
How many centimeters are there in 9.3 meters
Answer:
930 centimeters
Explanation:
Which refers to the change of pitch heard when the source of the sound approaches and then moves away from a stationary person? Doppler effect volume resonance effect vibration
The Doppler effect is the change of pitch heard when the source of the sound approaches and then moves away from a stationary person. So, the correct option is A.
What is Doppler effect?The Doppler effect or Doppler shift is defined as the phenomenon observed when a source of waves is moving with respect to an observer. For example, an ambulance passing us with the sound of its siren is a common physiological demonstration of the Doppler effect.
The frequency increases when the listener and the source are approaching each other, while the frequency decreases when the listener and the source are moving away from each other. The Doppler effect is the change of pitch heard when the source of the sound approaches and then moves away from a stationary person.
Therefore, the correct option is A.
Learn more about Doppler's effect, here:
https://brainly.com/question/15318474
#SPJ6
3. The velocity of sound is 332 m/s. Answer the following questions:
i) What is the minimum and maximum frequency of sound which
is heard to the human ear?
ii) What is the wavelength of the shortest and longest waves heard
to the human ear?
Answer:
20 Hz, 20000 Hz
0.0166 m, 16.6 m
Explanation:
The minimum frequency that a human ear can hear is 20 Hz
The maximum frequency that a human ear can hear is 20000 Hz.
v = Velocity of sound = 332 m/s
Wavelength is given by
[tex]\lambda=\dfrac{v}{f}\\\Rightarrow \lambda=\dfrac{332}{20}\\\Rightarrow \lambda=16.6\ \text{m}[/tex]
The longest wavelength that can be heard by the human ear is 16.6 m
[tex]\lambda=\dfrac{332}{20000}\\\Rightarrow \lambda=0.0166\ \text{m}[/tex]
The shortest wavelength that can be heard by the human ear is 0.0166 m.
You weigh 620 N. What would you weigh if the Earth were three times as massive as it is and its radius were four times its present value? Answer in units of N
Answer:
if
Explanation:
weight is the force of gravity on a mass; the force of gravity is
F = G M m/r^2
F is grav force
G is the newtonian gravitational constant = 6.67 x 10^-11 Nm^2/kg^2
M=mass of the earth
m=mass of the object
r= radius of the earth
if the mass of the earth increases by a factor of 6, this will tend to increase the grav force by a factor of 6
if the radius increases by a factor of 5, this will change the grav force by a factor of 1/5^2 = 1/25
the total effect is 6/25 = 0.24; therefore, your weight would be 0.24 * 620N = 149N
Dana pulls a spring with a spring constant k=300 N/M, stretching it from its rest length of 0.40 m to 0.50 m. What is the elastic potential energy stored in the spring?
Answer:
[tex]1.5\:\mathrm{J}[/tex]
Explanation:
The elastic potential energy of a spring is given by the following:
[tex]PE_s=\frac{1}{2}k\Delta x^2[/tex], where [tex]k[/tex] is the spring constant and [tex]\Delta x[/tex] is displacement.
The displacement of the string is [tex]0.50-0.40=0.10\: \mathrm{m}[/tex].
Plugging in our given values, we get:
[tex]PE_s=\frac{1}{2}\cdot300\cdot0.10^2=\fbox{$1.5\:\mathrm{J}$}[/tex].
The elastic potential energy stored in the spring is 1.5 joule.
What is potential energy?Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases.
If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy. It is capable of performing more work when raised. Potential energy is a characteristic of systems rather than of particular bodies or particles.
Spring constant of the spring : k = 300 N/m.
Initial length of the spring = 0.40 m
Final length of the spring = 0.50 m.
Hence, stretching of the spring: Δx = 0.50 m - 0.40 m = 0.10 m.
So, the elastic potential energy stored in the spring is = 1/2 × k × Δx²
= 1/2 × 300 × (0.10)² joule
= 1.5 joule.
Learn more about potential energy here:
https://brainly.com/question/24284560
#SPJ2
The image shows landforms in Monument Valley, Utah.
Which correctly lists the three features shown in the photo?
folds, strike-slip faults, and anticlines
anticlines, synclines, and folds
synclines, normal faults, and strike-slip faults
normal faults, folds, and anticlines
The correctly lists the three features shown in the photo is folds, strike-slip faults, and anticlines.
What is the difference between folds and failures?Modern folds are those that emerged recently (on the scale of geological periods), that is, in the Tertiary Period (between 65 million and 2.5 million years ago). Faults are geological structures that originate from vertical (top-down) or inclined internal forces.
The transcurrent fault – also called horizontal fault – occurs when there is displacement in the horizontal plane between the two blocks, being more common in zones where two tectonic plates meet, when these also move horizontally.
See more about transcurrent fault at brainly.com/question/2387953
#SPJ2
Answer: folds, strike-slip faults, and anticlines. (A)
Explanation: Got it right on my exam on Edge.
HELP I GIVE YOU BRAIN!!!!
Answer: The trip took 40 minutes average speed should be 1 mph
Explanation: It takes aprox 12 mins to reach 20km and the trip took 40 mins. This is obviously above what it should be. Not sure if I'm 100% correct
The middle one please need done by 3
Calculate the temperature change when 1000J of heat is supplied to 100g of water.
Please explain
Explanation:
Given
heat supplied (Q) = 1000 J
mass(m) = 100 g = 0.1 kg
specific heat capacity of water(s) = 4200 J/kg°C
change in Temperature (dt) = ?
We know we have the relation
Q = m * s * dt
Or, 1000 = 0.1 * 4200 * dt
Or, 1000 = 420 dt
Or, dt = 1000/ 420
Therefore dt = 2.38°
Hope it will help :)
The temperature changes when 1000J of heat is supplied to 100g of water is dt = 2.38°
What is temperature?The average kinetic energy of a system is measured by its temperature. The kinetic energy of a system starts to rise as the particle's velocity increases, which raises the system's temperature.
The energy that is transferred when two bodies with different surface temperatures come in touch is referred to as heat.
The change is when 1000J of heat is supplied to 100g of water.
Given that:
heat supplied (Q) = 1000 J
mass(m) = 100 g = 0.1 kg
specific heat capacity of water(s) = 4200 J/kg°C
Change in Temperature (dt) = ?
We know we have the relation
Q = m x s x dt
Or, 1000 = 0.1 x 4200 x dt
Or, 1000 = 420 dt
Or, dt = 1000/ 420
Therefore, the temperature changes when 1000J of heat is supplied to 100g of water is dt = 2.38°.
To learn more about temperature, refer to the link:
https://brainly.com/question/11464844
#SPJ2
Where did all the golden carals go?
Answer:
Thanos went *snap*
Explanation:
a __ allows you to determine the position of an object
this is science plz helpp
A north magnetic pole is facing another north magnetic pole with a distance x
. If the distance between the poles becomes 1/2x
, what happens to the magnitude of the field energy between them?(1 point)
The field energy will gradually dissipate until it reaches zero.
The field energy will remain unchanged.
The field energy will decrease.
The field energy will increase.
Answer:
Option 4 (The field energy will increase) is the right response.
Explanation:
Whereas the power kept secure in either an attribute has been collected, the artifact would be decided to push throughout the straight line that induces the electrostatic repulsion to greatly reduce. This same power generated will indeed be significantly decreased as well as supplanted by the power generation of the motion. Sometimes when magnetic poles figure together including poles, this same energy rendered inaccessible would then greatly reduce if those who keep moving off from each other. So our policy requires that perhaps the magnets would be tried to push throughout a position that reduces the energy consumed. That is, they're being allowed to force apart.All those other alternative solutions aren't closely linked to the example in question. Therefore the choice above is the right one.
Skater A bumps into another skater, Skater B. Skater B is stationary.
The skaters move off together in a straight line.
Explain what happens to the velocity of each of the skaters.
Use the idea of conservation of momentum.
From the principle of the conservation of energy, the velocity of the moving skater would be transferred to the stationary skater.
What is the conservation of energy?We know that according to the principle of the conservation of energy, energy can neither be created nor destroyed but we can be able to convert the energy from one form to the other. Given the fact that the energy of the object can be converted, we can also look at the collision as being an inelastic Collison.
Let us recall that a collsion is said to be in elastic if the momemtum and thge kinetic energy of the colliding particles is not conserved. The simple implication of this is that the objects would stick together and then move at a common velocity after the collision must have taken place in the system.
Learn more about energy conservation:https://brainly.com/question/13949051
#SPJ1
a) Las siglas M. RU significan
Answer:
Ver la explicación a continuación.
Explanation:
En física estas siglas significan movimiento rectilíneo uniforme, es decir es el tipo de movimiento donde la velocidad es constante. La velocidad no cambia con el tiempo.
Este tipo de movimiento se puede describir con la siguiente ecuación.
[tex]x=x_{0}+v*t[/tex]
Donde:
x = posición final [m]
xo = posición inicial [m]
v = velocidad [m/s]
t = tiempo [s]
The diagram shows a wave traveling through a medium.
Identify point B.
amplitude
crest
trough
wavelength
The point B represent the crest of the wave. The crest is the peak of the wave. While the trough is the lowest.
What is wavelength?The distance between two successive troughs or crests is known as the wavelength.
The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.
The point B represent the crest of the wave. The crest is the peak of the wave. While the trough is the lowest.
Hence, option B is correct.
To learn more about the wavelength, refer to the link;
brainly.com/question/7143261
#SPJ2
What happens to
light when it is
transmitted?
When light is transmitted through an object things can happen. The light could be reflected by the thing. Or it could be absorbed by the object. Saying this based on what I know.
A professional golfer walks at an at an average rate of 4.20 meters per second on the golf course. The amount of time required for her to walk from the tee to the green 622 meters away is
Answer:
T try d add b CD c
Explanation:
Cdgffd
I have a 3 cc piece of aluminum with a density of steel with a mass of 24.0 g. I cut it into 2 equal pieces. How has the density of the steel pieces changed
Answer:
What happens to the density of an object if the object is cut in half? ... The density remains the same because cutting the object in half will divide the mass & volume by the same amount. Also, the density of a substance remains the same no matter what size it is.
Explanation:
What happens to the density of an object if the object is cut in half? ... The density remains the same because cutting the object in half will divide the mass & volume by the same amount. Also, the density of a substance remains the same no matter what size it is.
Science Tolliver
Complete the sentence to explain when waves interact.
Waves interact with
and other
Intro
Done
Answer:
Objects; waves.
Explanation:
Waves interact with objects and other waves. Thus, waves are used on objects such as mobile phones and can be transformed from one form to another.
There are various types of waves in our physical environment such as gamma rays, x-rays, ultraviolet waves, radio waves etc.
Radio waves can be defined as an electromagnetic wave that has its frequency ranging from 30 GHz to 300 GHz and its wavelength between 1mm and 3000m. Therefore, radio waves are a series of repetitive valleys and peaks that are typically characterized of having the longest wavelength in the electromagnetic spectrum.
Basically, as a result of radio waves having long wavelengths, they are mainly used in long-distance communications such as the carriage and transmission of data. Some examples of communication technologies that uses radio waves are radio set, mobile phones, television etc.
a.) Determine the work done by Zach on the bull.
Explanation:
Work done is a physical quantity that is defined as the force applied to move a body through a particular distance.
Work is only done when the force applied moves a body through a distance.
Work done = Force x distance
The maximum work is done when the force is parallel to the distance direction.
The minimum work is done when the force is at an angle of 90° to the distance direction.
So to solve this problem;
multiply the force applied by Zack and distance through which the bull was pulled.
Use the equation below to answer questions (14-21). C12H22O11(s) → 12C(s) + 11H2O(g) 14)The left side of the chemical equations is the _______________________. 15)List the coefficients of the reactants ____________________ What type of chemical reaction is this equation? ________________________________ 16)The number 11 is called a ________________ 17)How many atoms in oxygen of the reactants ______________ 18)The right side is called the ________________ 20)List the four states of matter: ________________________________________________ 21)What are the number of atoms on the product side?
Answer:
14) Reactant
15) 1 .Precipitation reaction equation
16) The coefficient
17) 6.6242 × 10²⁴ atoms of oxygen
18) The product
20) The four states of matter are;
a) Solids
b) Liquids
3) Gas
4) Plasma
21) The total number of atoms in the product is 2.7099 × 10²⁵ atoms.
Explanation:
14) The left side of the chemical equation is the reactant
15) The coefficient is the number in font of the formula, here, the coefficient of the reactant C₁₂H₂₂O₁₁ is 1 .This is a precipitation reaction equation
16) The number 11 in front of the formula, H₂O, is called a coefficient
17) On mole of a substance is defined as containing one Avogadro's number, [tex]N_A[/tex] of molecules
[tex]N_A[/tex] ≈ 6.022 × 10²³ mol⁻¹
In the reactant, C₁₂H₂₂O₁₁, there are 11 elements of oxygen in one mole of the reactants, which gives 11 × 6.022 × 10²³ = 6.6242 × 10²⁴ atoms of oxygen in one mole of the reactants
18) The right side of the chemical equation is called the product
20) The four states of matter are;
a) Solids
b) Liquids
3) Gas
4) Plasma
21) The number of elements on the product side are;
12 Carbon + 22 Hydrogen + 11 Oxygen = 45 Elements total
However, given that there are 12 moles of carbon, we have;
12 × 6.02 × 10²³ = 7.2264 × 10²⁴ atoms of carbon
For hydrogen, we have;
22 × 6.02 × 10²³ = 1.32484 × 10²⁵ atoms of hydrogen
For oxygen, we have;
11 × 6.02 × 10²³ = 6.6242 × 10²⁴ atoms of oxygen
The total number of atoms in the product is 7.2264 × 10²⁴ + 1.32484 × 10²⁵ + 6.6242 × 10²⁴ = 2.7099 × 10²⁵ atoms.