Answer:
1 inch = 2.54 cm
12.9 inches= 12.9 x 2.54
= 32.766
= 32.8 cm (approximately)
Hope it helps...
Answer:
B) I just solved it
Explanation:
A block attached to a horizontal spring of force constant 75N/m undergoes SHM with an amplitude of 0.15m. If the speed of the mass is 1.7 m/s when the displacement is 0.12m from the equilibrium position, what is the mass of the block?
Answer:
x = A sin w t for SHM where w = angular frequency
sin w t = x / A = .12 / .15 = .8 where w t is the angle in degrees
w t = 53.1 deg (w itself is in rad / sec)
since v = A w cos w t
then v / x = w cos w t / sin w t = w / tan w t
w = v / x * tan 53.1 = 1.7 / .12 * tan 53.1 = 18.9 /sec
Also for SHM w = (k / m)^1/2
m = k / w^2 = 75 / 18.9^2 = .21 kg
You use 35 joules of energy to move a 7 newton box. How far did you move it?
If you picked it straight up, you lifted it 5 meters.
If you moved it horizontally, it could be ANY distance.
Answer:
5
Explanation:
distance = work / force
d = 35 J / 7 N
d = 5 m
true or false
Impulse is defined as the force exerted on an object times the time it lasts.
Answer: true
Explanation: when two objects collide and completely bounce apart with no lasting deformation or generation of heat, the collision is said to be elastic.
have a good day!! please mark me brainliest
What is the mass of a person who weighs 500 N?
Answer:
51 kg
Explanation:
Answer:
51kg
Explanation:
So his mass is Weight/gravity=500 N / 9.8 m/s^2 = 51 kg.
15% input work is lost due to friction then what is the efficiency of machine?
Answer:
I think 50%
Explanation:
Because the efficiency of a machine is always less than 100%. And efficiency of a machine is 75%.
So, if 15% input work is lost due to friction then efficiency is maybe 50%.
What is electricity and where does it come from?
Answer:
it is created power we use everyday
electricity is made of the flow of electrons.
but its made by a generated by a power plant bye electric generators
brainliest?
use your brain :)
a car drives 16 m east, then 25 m south, then 16 m west. calculate the distance travelled by car
Answer:
16m + 25m + 16m = 57m
the car travelled 57 m
How do we know if something is living or non-living?
If something is living it usually has to eat something to thrive, for example a tree photosynthesis to get the nutrition it needs while a rock just sits there and isn't living.
Answer:
To be considered living it have to use energy, it has to be made of cells. Something living is also referring to things that were once living
Explanation:
3.The melting point of lead is 327.5 °C. Which of the following statements is correct? (1 Point) A)Lead is a gas at 280 °C B)Lead is a solid at 310 °C C)Lead is a liquid at 300 °C D)Lead is a solid at 390 °C
Answer:
B)Lead is a solid at 310 °C
Explanation:
The melting point of a substance refers to that temperature in which the substance changes state from solid to liquid. The melting point of a substance, which is usually a temperature value, is that actual temperature the change of state occurs.
According to this question, the melting point of Lead (Pb), which is naturally a solid metal, is 327.5°C. This means that LEAD (Pb) will only change to its liquid state at exactly 327.5°C and above. Therefore, at a temperature of 310°C, which is lower than lead's melting point, Lead element will still be a solid.
Answer: The correct answer is B. Lead is a solid at 310
Explanation:
What is TRUE about a capitalist society?
The idea behind capitalism is that the free market of products and ideas is owned and driven by private citizens. A capitalist society is a social order in which private property rights and the free market serve as the basis of trade, distribution of goods, and development.
Answer:
In ideal terms: In a capitalist economic system, the owner of production is the individual, and the benefactors of production are first the individual and second the society. In a socialist or communist economic system, the owner of production is the state or the society, and the benefactor is the society.
Questlon 3 of 5 What statement best describes what a circle graph shows? O A. Data as proportions of a whole B. The relationship between two variables OC. A frequency distribution D. The average of a data set
Answer:
it would be a
Explanation:
A car initially rolling at 12 m/s comes to a stop in 20 seconds. Assuming the car has uniform acceleration, how far does it travel during this time interval?
Hurry plz there’s a timer!!
Paco was driving his scooter west with an initial velocity of 4 m/s. He accelerates at 0.5 m/s for 30 seconds.
What is his final velocity?
O 2 m/s
O 8 m/s
O 19 m/s
O 60 m/s
Answer:
the answer is 19 ,30 (second) times 0.5= 15
15+4= 19
After Paco drives his scoter west with an initial velocity of 4 m/s and then accelerates at 0.5 m/s² for 30 s, his final velocity is 19 m/s, so the correct option is the fourth.
The final velocity of Paco can be calculated with the following equation:
[tex] v_{f} = v_{i} + at [/tex]
Where:
[tex] v_{f}[/tex]: is the final velocity =?
[tex]v_{i}[/tex]: is the initial velocity = 4 m/s
a: is the acceleration = 0.5 m/s²
t: is the time 30 s
Hence, the final velocity is:
[tex] v_{f} = 4 m/s + 0.5 m/s^{2}*30 s = 19 m/s [/tex]
Therefore, the correct option is 19 m/s.
You can find more about acceleration and velocity here: https://brainly.com/question/9163788?referrer=searchResults
I hope it helps you!
A mover's dolly is used to pull a 115 kg refrigerator up a ramp
into a house. The ramp is 2.10 m long and rises 0.850 m. The
mover exerts a force of 496 N up the ramp. How much work is
spent overcoming friction?
Answer:
84 J
Explanation:
Work by mover:
W = Fd
W = 496 J (2.1 m)
W = 1042 J
Work by dolly and ramp:
W = Fd
W = (mg)d
W = 115 kg (9.8 m/s/s) (0.85 m)
W = 958 J
1042 J - 958 J
= 84 J
The amount of work spent in overcoming friction is 83.65 J.
From the question,
The amount of work spent in overcoming friction = work done by the mover-potential energy of the refrigerator.
This is expressed mathematically as,
W' = Fd-mgh................... Equation 1
Where W' = work spent against friction, F = force applied, d = distance, m = mass of the refrigerator, g = acceleration due to gravity, h = height.
From the question,
Given: F = 496 N, d = 2.10 m, m = 115 kg, h = 0.85 m
Constant: g = 9.8 m/s².
Substitute these values into equation 1
W' = 496(2.1)-(115×9.8×0.85)
W' = 1041.6-957.95
W' = 83.65 J.
Hence, the amount of work spent in overcoming friction is 83.65 J
Learn more about friction here: https://brainly.com/question/13683196
Fun fact
An apple, potato, and onion all taste the same if you eat them with your nose plugged
Answer:
Fun fact
An apple, potato, and onion all taste the same if you eat them with your nose plugged
Explanation: yes
Wooden handles on knives do not require maintenance.
TRUE
FALSE
Answer: false
Explanation:
You have to make sure it doesn’t stay wet
a student drops a tennis ball from rest. the ball falls 13m to the ground.find the final speed of the ball,just before it reaches the ground
[tex] ({v})^{2} - ({v(0)})^{2} = 2 \times a \times ∆x[/tex]
[tex]v = the \: \: speed \: \: before \: \: reaching \: \: ground \\ [/tex]
[tex]v(0) = the \: \: speed \: \: in \: \: the \: \: rest \: \: which \: \: is \: \: zero \\ [/tex]
[tex]a = Acceleration \: = \: Gravity \: \: acceleration = 10 \\ [/tex]
[tex]∆x = covered \: \: distance[/tex]
_________________________________
[tex] {v}^{2} - ({0})^{2} = 2 \times 10 \times 13 [/tex]
[tex] {v}^{2} = 2 \times 2 \times 5 \times 13 [/tex]
[tex]v = \sqrt{ {2}^{2} \times 65 } [/tex]
[tex]v = 2 \sqrt{65} \: \: \frac{m}{s} [/tex]
Done.....♥️♥️♥️♥️♥️
An object has a density of 0.755 g/mL. Its volume is 640 mL. What is its mass?
Answer:Density = 7.5 g/ml (By putting the given values.) [ The ratio of the mass to volume is the density, that's why the unit of the density is also the ratio of the unit of mass to the unit of volume. ] Hence, the density of the object is 7
Explanation: Google
"A car is travelling at 70 m/s. The driver sees a cow in the road and slows down with a constant acceleration for 10 seconds before coming to a stop. What is the car’s displacement by the time is stops." what information do you know?
The question does not ask for anything in particular. I will calculate the acceleration and distance.
Answer:
The acceleration of the car is [tex]-7\ m/s^2[/tex]
The distance traveled before stopping is 350 m
Explanation:
Constant Acceleration Motion
It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.
Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:
[tex]v_f=v_o+at\qquad [1][/tex]
The distance traveled by the object is given by:
[tex]\displaystyle x=v_o.t+\frac{a.t^2}{2}\qquad [2][/tex]
The car has an initial speed of v0=70 m/s when the driver sees a cow in the road and steps on the brakes with an (assumed) constant acceleration during t=10 seconds before stopping (vf=0).
With the information provided, we can calculate the value of the acceleration and the distance traveled.
Using the equation [1] we can solve for a:
[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]
Substituting the numerical values:
[tex]\displaystyle a=\frac{0-70}{10}=-7\ m/s^2[/tex]
The acceleration of the car is [tex]-7\ m/s^2[/tex]
The distance is now calculated by using [2]
[tex]\displaystyle x=70\cdot 10+\frac{(-7)\cdot 10^2}{2}[/tex]
[tex]\displaystyle x=700-\frac{700}{2}=350\ m[/tex]
The distance traveled before stopping is 350 m
A bowling ball is rolling down the lane at a constant velocity of 7.5 m/s. If the bowling ball travels 18 m down the entire lane, how long does it take for the ball to reach the end?
Answer:
The answer is 2.4 sExplanation:
To find how long it took the ball to reach the end we use the formula
[tex]t= \frac{d}{v} \\ [/tex]
where
t is the time
d is the distance
v is the velocity
From the question
d = 18 m
v = 7.5 m/s
We have
[tex]t = \frac{18}{7.5} \\ [/tex]
We have the final answer as
2.4 sHope this helps you
Does the mass of an object dictate the acceleration of
a falling object
Answer:
No.
Explanation:
Because the acceleration of falling objects is constant and is not affected by mass
Answer: no
The acceleration of an object is equivalent to the gravitational acceleration. The size, shape, and weight of an item are not a cause in the motion of the object. So all objects, regardless of its mass, size, or shape fall freely with the same acceleration.
a soccer player kicks a ball with an initial velocity of 10 meters per second at an angle of 30 degrees
Answer:
Did you make a diagram?
Make your hypotenuse 10 and the base angle 30°
find the length of the adjacent side using
10cos30°
Explanation:
Answer:
A soccer player kicks a ball with an initial velocity of 10.0 meters per second at an angle of 30.0° above the horizontal. The magnitude of the horizontal component ofthe ball's initial velocity is which of the following?
9.8 m/s
0.50 m/s
15 m/s
7.4 m/s
Explanation:
What are three key aerodynamics principles?
A Drag, height, and acceleration
B Drag, downforce, and drafting
C Acceleration, downforce, and motion D Acceleration, height, and motion
Answer:
A
Explanation:
There are three basic forces in aerodynamics: acceleration, which moves an airplane forward; drag, which holds it back; and height, which keeps it airborne. Lift is generally explained by three theories: Bernoulli's principle, the Coanda effect, and Newton's third law of motion.
A 25 N force is applied to a 1.4 kg mass on level ground. If a 5 N frictional force is present between the surface and the object, what is the magnitude of the acceleration of this object?
Given parameters:
Force applied to the mass = 25N
Mass of the body = 1.4kg
Frictional force = 5N
Unknown:
Acceleration of the object = ?
Solution:
The net force on the object;
Fapplied - Frictional force = net force (m x a)
m is the mass of the body
a is the acceleration
Input the parameters and solve;
25 - 5 = 1.4 x a
1.4a = 20
a = [tex]\frac{20}{1.4}[/tex] = 14.3m/s²
The magnitude of the acceleration of the object is 14.3m/s²
How long will it take you to reach the cafeteria if it is 75 m away and you can travel at an average speed of 2 m/s down the stairs?
Rita has two small containers, one holding a liquid and one holding a gas. Rita transfers the substances to two larger containers. Compare the behavior of the atoms in the liquid and in the gas once they are moved to the larger containers
Answer: liquids take the shape of the container they are in, but have definite volume. like liquids the shape of a gas changes with the container. unlike liquids the volume of a gas changes depending on the container it is in
Explanation:
Answer:
liquids flow freely, they take the shape of the container they are in, but have a definite volume. Like liquids, the shape of a gas changes with the container. This is because the atoms in a gas move rapidly and freely to fill any available space. Unlike liquids, the volume of a gas changes depending on the container it
Explanation
A sports car has a mass of 1,460kg and accelerates at 2.04 meters per second squared. What is the magnitude of the force acting on the sports car?
Answer:
The answer is 2978.4 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × accelerationFrom the question
mass = 1,460kg
acceleration = 2.04 m/s²
We have
force = 1460 × 2.04
We have the final answer as
2978.4 NHope this helps you
A car accelerates from 2 m/s to 5 m/s in 1.8 seconds. What is the acceleration of the car?
Answer:
5-2 / 1.8 = 1.66m/s
Explanation:
acceleration = vf-vi / t
vf= 5m/s
vi= 2m/s
t= 1.8 s
If there is 10% sales tax on a car costing $18,000
How much is the sales tax?
O $180
O $1800
O $1.80
O $800
Answer:
180
Explanation:
i think
What keeps the sun shining
Answer:
The Sun shines by turning hydrogen into helium in its core.
Explanation:
This process is called nuclear fusion. Fusion happens when lighter elements are forced together to become heavier elements. When this happens, a tremendous amount of energy is created.
