Answers
Answer:
3a) k = 500 N/m
3b) x = 0.05 m
3c) F = 2.5 N
4a) W = 120 N
4b) W = 5 N
4c) W = 0.2 N
Explanation:
3a) Force; F = 10 N.
Extension; x = 20 mm = 0.02 m
Formula for spring constant is;
K = F/x = 10/0.02
k = 500 N/m
3b) Force is now; F = 25 N
Since k = 500 N/m
Then x = F/k = 25/500
x = 0.05 m
3c) extension is now 5 mm = 0.005 m
Thus; F = kx = 500 × 0.005
F = 2.5 N
4a) Formula for weight is;
W = mg.
g = 10 N/kg
m = 12 kg
Thus; W = 12 × 10
W = 120 N
4b) Mass; m = 500 g = 0.5 kg
Thus; W = 0.5 × 10
W = 5 N
4c) mass; m = 20 g = 0.02 kg
W = 0.02 × 10
W = 0.2 N
Related Questions
A particle with an electric charge of 2*10-3^C is a distance of 5 m from a particle with a charge of 8*10-5 C . What is the strength of the electrostatic force between the two particles?
Answers
Answer:
F= K q1q2/r^2
K is a constant uqual to= 9 x 10^9 N m^2 C^-2
F= 9 x 10^9 x 2 x 10^-3 x 8 x 10^-5/25
F= 1440/25= 58N
An egg sinks in fresh water but floats on concentrated salt solution
Answers
the salt solution exerts a greater up thrust on the egg which balances the weight of the egg, so the egg floats in a strong salt solution but sinks in fresh water
A goose flying south for the winter travels 55 miles directly south east (45 degrees) and then flies at an angle of 35 degrees Northeast for 75 miles. How far and in what direction did the goose travel?
Answers
Answer:
Part A
The distance from the start point the goose travels is approximately 84.96 miles
Part B
The direction the goose travel is approximately 71° Northeast
Explanation:
Part A
The distances the goose flies is given as follows;
The distance directly 45 degrees southeast the goose travels, AB = 55 miles
The distance Northeast the goose travels, BC = 75 miles
The angle Northeast the goose travels = 35°
From the attached drawing of the path the goose travels, we have, by cosine rule, the following relation;
a² = b² + c² - 2·b·c·cos(A)
Therefore, we have;
The length of side [tex]\overline{AC}[/tex]² = 55² + 75² - 2 × 55 × 75 × cos(80°) = 7217.40253425
[tex]\overline{AC}[/tex] = √(7217.40253425) ≈ 84.9552972701
The distance from the start point the goose travels ≈ 84.96 miles
Part B
By sine rule, we have;
75/(sin(A)) = [tex]\overline{AC}[/tex]/(sin(80°))
sin(A) = (75/[tex]\overline{AC}[/tex]) × (sin(80°)
∴ sin(A) = (75/84.9552972701) × (sin(80°) = 0.8694052016
∠A = arcsin(0.8694052016) = 60.3895991264° ≈ 60.4°
The direction the goose travel = 180 - 64 - 45 = 71°
∴ The direction the goose travel =≈ 71° Northeast
When you blow across the top of
a soda bottle, it acts like a closed
pipe. If it creates a fundamental
frequency of 680 Hz, how deep
is the bottle?
(Speed of sound = 343 m/s)
(Unit = m)
Please need help!!!!
Answers
Answer:
the new foundation would beExplanation:
ok
If an object is tossed up into the air, what is its velocity at the top of the object's path? (Units are ms-1)
Answers
Answer: [tex]0\ ms^{-1}[/tex]
Explanation:
Given
If an object reaches the topmost point i.e. it cannot travel beyond that point as its velocity is zero at the topmost point
As some velocity is needed to move the object, so velocity at topmost point is zero
does anybody have social media and could help me with my homework ? i will send you pictures of my work please all of my work is due tomorrow!! i need help
Answers
What are the mechanical advantage and mechanical efficiency of a lever that requires an input force of 40 N and lifts and lifts a boulder that weighs 80 N?
Answers
Answer:
2 , 200%
Explanation:
Mechanical advantage of a machine is defined as how much the machine multiplies the applied force.
It is given that :
Input force of the lever = 40 N
The weight of the boulder or the output force = 80 N
Therefore, the mechanical advantage = output force / input force
[tex]$=\frac{80}{40}$[/tex]
= 2
Mechanical efficiency is obtained by the dividing the output by the input and multiplying it with 100.
i.e. Efficiency = output / input x 100
[tex]$=\frac{80}{40}\times 100$[/tex]
= 200 %
A car traveled a distance of 30 km in 20 minutes (1/3 hours). What was the
speed of the car?
O A. 90 km/hr
O B. 60 km/hr
O c. 30 km/hr
O D. 10 km/hr
Answers
20 minuets is 1/3 of an hour so you multiply 30 km by 3 and get 90 km/hr
Which would increase the speed of a sound wave?
Answers
Answer:
I would say temperature
If C is the vector sum of A and B, C = A + B, What must be true if C = A + B?. What must be true if C = 0?.
Answers
2. How does laser light differ from
normal light?
Answers
Answer:
Laser light differs from normal light because laser lights are monochromatic which means it only shines one color and only that color :3
Explanation:
:3
What acceleration would be achieved by a 5N thrust motor in a 0.30kg
Answers
Answer:
F=ma
5N=0.3a
a=5/0.3=16.66m/s²
PLEASE GIVE BRAINLIEST
Answer:
16.7
Explanation:
acceleration=force/mass
One of the solid reactants was treated in a coffee grinder before adding to
the reaction container. *
O
A. Concentration
B. Temperature
C. Surface Area
D. Catalyst
E. Agitation
Answers
Answer:
C. Surface area
Explanation:
The rate of chemical reaction depends on various factors such as:
concentration and pressurenature of reactantstemperaturesurface areapresence of catalyst, etc.Effect of surface area of reactants: the rate of a chemical reaction can be increased by increasing the the area of contact of the reacting substances. This is especially important when one or more of the reactants are solids., because only the particles of the solid that are exposed are able to take part in the reaction at each instant of time. Therefore, the greater the surface area of the solid reactant particles the faster the reaction.
The surface area of solid reactants can be increased by grinding or pelletizing, thus allowing for a greater contact between the reacting particles,
The instance in which one of the solid reactants was treated in a coffee grinder before adding to the reaction container is one way of increasing the surface area of a reactant.
The equation that relates two poles to the force between them and their separation is the ____ square law.
a. exponential
b.inverse
c.double
Answers
You welcome
Two dogs are pulling on a chew toy. One dog pulls the chew toy with 64 N [E] and
the other pulls the chew toy with 31 N [W]. Determine the ACCELERATION of the 3
kg chew toy.
Answers
Answer:
Eastward, at 11 m/s^2
Explanation:
64N-31N=unbalanced force of 33N
F=ma
33N=(3kg)a
a=11m/s^2 to the East
You flip a coin straight up if the coin reaches a high point of 0.25 m above where you released it what was the initial speed?
Answers
Answer: 2.21 m/s
Explanation:
Given
Coin reaches a height of 0.25 m above the launch point
Suppose u is the initial speed of the coin
Using the equation of motion
[tex]\Rightarrow v^2-u^2=2as\\[/tex]
Putting values
[tex]\Rightarrow 0^2-u^2=2\times g\times s=2\times (-9.8)\times 0.25\\\Rightarrow u^2=4.9\\\Rightarrow u=2.21\ m/s[/tex]
Thus, the initial velocity is 2.21 m/s
What is the kinetic energy of a 25 kg object moving at a velocity of 4 m/s?
Answers
Thus Kinetic energy of the object is 200J when mass is 25 kg and velocity is 4 m/s.
3. A diagram showing the location of protons, neutrons, and ALL of the electrons in an atom.
A. Bohr Model
B. Orbital
C. Isotopes
D. Atomic number
Please answer this ASAP
Answers
Answer:
Bohr Model
Explanation:
If I hold my hand next to a Bunsen burner, what type energy transfer is occurring? Is it Conduction, Convection or Radiation and why do they occur?
Answers
Answer:
Radiation, as it is not directly above but it is off to the side
Explanation:
Which happens when sound waves enter a vacuum?
A. They are reflected.
B. They move slower
C. They move faster
D. They stop moving
Answers
A car is moving at 11m/s and has a mass of 1200 kg. What is the momentum of her car?
(no links please!)
Answers
Answer:
momentum= mass x velocity
= 11 x 1200 =13200kgm/s
Which statements describe how heat flows in foil? Check all that apply.
Answers
Answer:
Heat flows from a warmer object to a cooler object.What is the acceleration of a 24 kg mass pushed by an 8 N force?
Answers
Answer:
0.25 m/s squared
Explanation:
Mass of the body (m)= 24kg
Applied force on the body(F)= 6N
Acceleration of the body (a)= ?
Solution
F = ma
a = F/m
a = 6N/24kg
a = 0.25m/s^2
Answer: The acceleration of the body is 0.25m/s^2
I hope this helps
Answer:
[tex]\boxed {\boxed {\sf a=\frac {1}{3} \ m/s^2}}[/tex]
Explanation:
Force is the product of mass and acceleration.
[tex]F=ma[/tex]
The mass is 24 kilograms and the force is 8 Newtons. Let's convert the Newtons to make the problem easier.
1 Newton is equal to 1 kilogram meter per square second. The force of 8 N equals 8 kg*m/s²Substitute the known values into the formula.
[tex]8 \ kg*m/s^2= (24 \ kg )*a[/tex]
Since we are solving for a, we must isolate the variable. It is being multiplied and the inverse of multiplication is division. Divide both sides by 24 kilograms.
[tex]\frac {8 \ kg*m/s^2}{24 \ kg}= \frac{(24 \ kg )*a}{24 \ kg}[/tex]
The kilograms will cancel, hence our earlier unit conversion.
[tex]\frac {8 \ m/s^2}{24 }= a[/tex]
[tex]\frac {1}{3} \ m/s^2=a[/tex]
The acceleration is 1/3 meter per square second.
When a hot object makes a cold object warmer what is it called
Answers
A force of 100N stretches an elastic string to a total length of 20cm. if an additional force of 100N stretches the spring 5 cm further, find the natural length of the spring if the elastic limit is not exceeded. Pls help ASAP
Answers
Answer:
8cm
Explanation:
The general formula to find this is F/X where in this case the f is the total of the two forces (100+100) and x is the sum of the length ( 20+5) which together comes 200&25respectively then divide 200 with 25 which comes 8cm.
Which statement correctly describes these electric field lines
Answers
Answer:
ok
Explanation:
the correct answer is C please follow me
Regina is making observations of waves from different sources. She wants to classify the waves as either mechanical or electromagnetic. Which question will BEST help Regina to classify the waves?
A.
Can the wave transfer matter?
B.
Can the wave transfer energy?
C.
Can the wave travel through a vacuum?
D.
Can the wave travel through a liquid?
Answers
Answer:
A. Can the wave transfer matter?
Explanation:
EMW is made by vibrations of the charged particles and they work on a mechanical waveform. The energy is transferred through a vacuum and thus they need a medium to pass the energy. Thus in order to transport the energy from one place to another, such as a sound wave. Hence first she should have knowledge about the chemical and physical properties of the waves such as can they transfer matter.The figure below shows two forces A=15 N and B=5 N acting on an object. What is the
resultant force on the object?
Answers
Answer:
18.03 N
Explanation:
From the fiqure below,
Using parallelogram law of vector
R² = 15²+5²-2×5×15cos(180-60)
R² = 225+25-150cos120°
R² = 250-150(-0.5)
R² = 250+75
R² = 325
R = √325
R = 18.03 N
Hence the resultant force of the object is 18.03 N
Plssss help I need good grade!!!! Plssss and thank u
Answers
Answer:
the answer is 'b'
According to me
Answer:
B
Explanation:
It has more negative signs than positive signs
What is the acceleration of a bike that starts from rest and after 10s is traveling 20m/s?
Answers
Answer:
10meter per second square
Explanation:
since the bike is from rest, the initial velocity is zero and the final velocity is 20m/s . so by formula a=v-u/t
a = 20-0/10
a = 2