A marble rolls across a table for 6 meters in 2.3 seconds. What is the
velocity of the marble?
Answer:
2.61 [tex]\frac{m}{s}[/tex]
Explanation:
v= d/t
v = 6m/2.3 s
v=2.61 [tex]\frac{m}{s}[/tex]
Answer:
[tex]\boxed {\tt v\approx2.61 \ m/s}[/tex]
Explanation:
Velocity can be found by dividing the displacement by the time.
[tex]v=\frac{d}{t}[/tex]
The displacement is 6 meters and the time is 2.3 seconds.
[tex]d= 6 \ m\\t= 2.3 \ s[/tex]
Substitute the values into the formula.
[tex]v=\frac{6 \ m}{2.3 \ s}[/tex]
Divide.
[tex]v=2.60869565 \ m/s[/tex]
Let's round to the nearest hundredth. The 8 in the thousandth place tells us to round the 0 to a 1.
[tex]v\approx2.61 \ m/s[/tex]
The velocity of the marble is about 2.61 meters per second.
A disc is thrown through the air for 1.5 min with a power output of 12.5 W. How much work is done when throwing the disc?
Answer:
work = 1125 [J]
Explanation:
To solve this problem we must remember the definition of power, which is defined as the relationship between work and time. The power can be calculated using the following equation:
Power = work/time
Power = 12.5 [w]
work = joules [J]
time = 1.5 [min] = 90 [s]
work = 12.5*90
work = 1125 [J]
I really need help with this, I would be happy if someone could help me.
You fly round-trip from Los Angeles to New York. The flight takes 6 hours each way and covers a distance of 4800 km. What were your average speed and average velocity on this round-trip flight?
Answer:
Average speed = 800 km/h and average velocity = 0
Explanation:
You fly round-trip from Los Angeles to New York.
Distance covered, d = 4800 km in 6 hours
We need to find the average speed and average velocity on this round-trip flight. Round trip means to come back at the initial point.
Total distance = 4800 km + 4800 km = 9600 km
Time, t = 6 h + 6 h = 12 h
Average speed,
[tex]v=\dfrac{9600\ km}{12\ h}\\\\v=800\ km/h[/tex]
So, the average speed is 800 km/h
When it comes back to the initial point. Its displacement is equal to 0. It means its average velocity will be equal to 0.
Rachel travels 100km in 5hrs. Find her AVERAGE SPEED. i need work shown too
Answer:
20kph
Explanation:
Since she travels 100kpm in 5 hours and 100 divided by 5 is 20 she would travel 20km in one hour
A heavy brick weighs more than a fluffy cushion, but the cushion takes up more space. Which object has more matter? How do you know?
Answer:
Explanation:The brick has more matter because it has more mass. :))
It
starts at position 0 and moves to the right until it arrives at
position 1. It then turns around and stops at position 2.
What is the average velocity of the ghost for the entire trip
if the entire trip takes 7 seconds?
0 -1.42 m/s
-1.42
1.42
O 1.42 m/s
how much work is done when a man uses a force of 400 N to push a car a distance of 50 metres
Answer:
The answer is 20,000 JExplanation:
The work done by an object can be found by using the formula
workdone = force × distanceFrom the question
force = 400 N
distance = 50 m
We have
work done = 400 × 50
We have the final answer as
20,000 JHope this helps you
1. A mass of 630g is hung on a spring. Using Force = mass x gravity, what is the force of the mass, acting on the spring?
Answer:
The answer is 6.3
Explanation:
[tex]f \: = \: m(kg) \times g( \frac{n}{kg} )[/tex]
[tex]f \: = \: 630 \times {10}^{ - 3} \times 10 = 6.3[/tex]
The normal force acting on a body is the weight by gravitational pull of earth. The force acting on the hanging mass of 630 g is 6.17 N.
What is force?Force is an external agent acting on a body to deform it or to change it from the state of rest or motion. Force is a vector quantity having both magnitude and direction.
A normal force acting on a body is due to its weight by gravitational pull of earth. The force of gravitation is a kind of force by which an object attracts other objects into its centre of mass. The strength of force depends on the mass of the object.
The weight of an object in earth is the product of its mass and gravity. The acceleration due to gravity on earth is 9.8 m/s². Therefore, the force by weight of the hanging mass of 630 g or 0.630 Kg is :
0.63 × 9.8 m/s² = 6.17 N.
To find more on gravitational force, refer here:
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A car is accelerating at a rate of 35 m/s2 and has a resulting velocity increase from 17 m/s to 26 m/s. How long did it take to change its velocity?
Answer:The answer is (60 mph - 0 mph) / 8s = (26.8224 m/s - 0 m/s) / 8s = 3.3528 m/s 2 (meters per second squared) average acceleration. That would be 27,000 miles per hour squared.
Explanation:
To win the game, a placekicker must kick a football from a point 44 m (48.1184 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 24 m/s at an angle of 31◦
from the horizontal.
The acceleration of gravity is 9.8 m/s^2.
By how much vertical distance does the ball clear the crossbar?
Answer in units of m.
Answer:
The distance by the ball clear the crossbar is 1.15 m
Explanation:
Given that,
Distance = 44 m
Speed = 24 m/s
Angle = 31°
Height = 3.05 m
We need to calculate the horizontal velocity
Using formula of horizontal velocity
[tex]u_{x}=u\cos\theta[/tex]
Put the value into the formula
[tex]u_{x}=24\cos(31)[/tex]
[tex]u_{x}=20.5\ m/s[/tex]
We need to calculate the vertical velocity
Using formula of vertical velocity
[tex]u_{y}=u\sin\theta[/tex]
Put the value into the formula
[tex]u_{y}=24\sin(31)[/tex]
[tex]u_{y}=12.3\ m/s[/tex]
We need to calculate the time
Using formula of time
[tex]t=\dfrac{d}{u_{x}}[/tex]
Put the value into the formula
[tex]t=\dfrac{44}{20.5}[/tex]
[tex]t=2.1\ sec[/tex]
We need to calculate the vertical height
Using equation of motion
[tex]h=u_{y}t+\dfrac{1}{2}at^2[/tex]
Put the value into the formula
[tex]h=12.3\times2.1-\dfrac{1}{2}\times9.8\times(2.1)^2[/tex]
[tex]h=4.2\ m[/tex]
We need to calculate the distance by the ball clear the crossbar
Using formula for vertical distance
[tex]d=h-3.05[/tex]
Put the value of h
[tex]d=4.2-3.05[/tex]
[tex]d=1.15\ m[/tex]
Hence, The distance by the ball clear the crossbar is 1.15 m
Which type of force is shown in the image?
Answer:
D contact force
Explanation:
Suppose the airplane in the preceding problem fires a projectile horizontally in its direction of motion at a speed of 300 m/s relative to the plane. (a) How far in front of the release point does the projectile hit the ground? (b) What is its speed when it hits the ground?
Answer:
a) s = 5619.2 m
b) v = 456.5 m/s
Note: The preceding question is given below:
An airplane flying horizontally with a speed of 500 km/h at a height of 800 m drops a crate of supplies (see the following figure). If the parachute fails to open, how far in front of the release point does the crate hit the ground?
Explanation:
From the preceding question;
height, h = 800 m,
speed of plane = 500 km/h = 500000 m / 3600 s = 139 m/s
Speed of projectile = 139 m/s + 300 m/s = 439 m/s
a) using h = ut + 1/2 * gt² = 1/2 gt² (sice u = 0)
t = √(2h/g) where g = 9.8 m/s²
t = √(2 * 800/9.8)
t = 12. 8 s
horizontal distance, s = horizontal velocity * time
s = 439 * 12.8
s = 5619.2 m
b) Final vertical velocity v₂ = u - gt
v₂ = 0 - 9.8 * 12.8 = 125.4 m/s
horizontal velocity, vₓ = 439.0 m/s
resultant velocity, v = √(v₁² + vₓ²)
v = √{(125.4)² + (439.0)²}
v = 456.5 m/s
Compare and Contrast atoms and ions..Thanks for your help!
Answer:
atoms is basic unit of matter, neutral because of the equal numbers to + and - particle charges.
ions is a charged molecule formed by the loss or gain of electrons.
Hope this helps
Can somebody plz answer this correct quickly!!!! :D
(WILL MARK BRAINLIEST)
(Use google idc)
Answer:
I think the answer is, Both humans and whale embryos have a tail and a backbone (I'm not sure).
Explanation:
This is because, both human and whale embryos have a tail and a backbone.
Hope this helps! :D
28 g of iron shot is added to a graduated cylinder containing 40 ml of water The water level rises to the 44 ml mark. From this information, calculate the density of iron
Answer:
700 kilogram/cubic meter
Explanation:
We have that for the Question "28 g of iron shot is added to a graduated cylinder containing 40 ml of water The water level rises to the 44 ml mark. From this information, calculate the density of iron" it can be said that the density of iron is
[tex]\rho=7.125m/l[/tex]
From the question we are told
28 g of iron shot is added to a graduated cylinder containing 40 ml of water The water level rises to the 44 ml mark.
From this information, calculate the density of iron
Generally the equation for the Density is mathematically given as
[tex]Density=\frac{M}{V}\\\\\rho=\frac{28.5}{44-40}\\\\\rho=7.125m/l[/tex]
Therefore
the density of iron is
[tex]\rho=7.125m/l[/tex]
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Sample Response: I disagree with her because an atom has two main parts: the nucleus and the electron cloud. Atoms have three subatomic particles: protons, neutrons, and electrons. Which of these statements did you include in your answer? Check all that apply The two main parts of an atom are the nucleus and the electron cloud. The three subatomic particles of an atom are protons, neutrons, and electrons.
Answer:
A and B
Explanation:
Both the given statements are true.
An atom has two main parts that include the nucleus and the electron cloud and an atom has three subatomic particles electron, proton and neutron.
The nucleus is consists of neutrons (neutral subatomic particles) and protons (positively charged) and the cloud of electrons consists of electrons which are negatively charged particles.
Hence, the correct answer is "A and B".
A motorbike is traveling to the left with a speed of 27.0 m s 27.0 s m 27, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction when the rider slams on the brakes. The bike skids 41.5 m 41.5m41, point, 5, start text, m, end text with constant acceleration before it comes to a stop. What was the acceleration of the motorbike as it came to a stop?
Answer:
The acceleration of the motorbike as it came to a stop was -8.78 m/s² (NOTE: Negative sign indicates deceleration)
Explanation:
From the question,
A motorbike is traveling to the left with a speed of 27.0 m/s.
This is the initial speed, that is, initial speed = 27.0 m/s
Also, from the question,
The rider slams on the brakes and the bike skids 41.5 m, that is, the bike covers a distance of 41.5 m after the rider slams on the brakes.
Distance = 41.5 m
To determine the acceleration of the motorbike as it came to a stop,
Since, the bike came to a stop, then, the final speed is 0 m/s
From one of the equations of motion for linear motion
v² = u² + 2as
Where v is the final speed (velocity)
u is the initial speed (velocity)
a is the acceleration
and s is the distance
From the question
v = 0 m/s
u = 27.0 m/s
s = 41.5 m
Putting these into the equation
v² = u² + 2as
0² = 27.0² + (2×a×41.5)
0 = 729.0 + 83a
83a = -729.0
a = -729.0 / 83
a = -8.78 m/s² (NOTE: Negative sign indicates deceleration)
Answer:
8.8 m/s^2
Explanation:
Khan Academy answer
what do you mean by MA of lever is 2
Answer:
MA of a lever is 2. It means the lever can lift a load of 2 times heavier than the effort
A loaded Costco shopping cart has a weight of 188 pounds(lb). You have to push the cart with a force of 14 pounds(lb) to keep it moving with a constant velocity of 1.1 m/s. What must be the magnitude (absolute value) of the force of friction on the cart?
Answer:
Force of friction = 14 pound
Explanation:
Magnitude = Force / Weight
Magnitude = 14 / 188
Magnitude = 0.074
So,
Force of friction = 14 pound
Force of friction is same as forcee
Frictional force along the direction of motion = 14 pounds
Frictional force is the resistance force towards relative motion. Frictional Force is a force the equation for which is given by the equation
[tex]f = \dfrac{\mu}{N} \\\mu = Coefficient \; of \; Friction \\\\N = Normal \; Reaction[/tex]
Weight of the Castco shopping cart = 188 Pounds (lb)
Force required to push the cart = 14 Pounds
Uniform velocity of shopping cart = 1.1 m/s
Acceleration in the direction of motion of cart = 0 m/s
So we can say that the forces in direction of motion must be balanced
So the magnitude (absolute value) of the frictional force along the direction of motion
= 14 pounds
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what is the measure of m
Answer:
x = 50°
Explanation:
52° + 78° + x = 180° (Because of the angle sum property)
=> 130° + x = 180°
=> x = 180° - 130°
=> x = 50°
Answer:
50°
Explanation:
Step 1:
52° + 78° + x = 180° Sum of a Δ
Step 2:
130° + x = 180° Combine Like Terms
Step 3:
x = 180° - 130° Subtract 130° on both sides
Answer:
x = 50°
Hope This Helps :)
please hellllllllllppppppppp meeeeee
Answer:
The displacement of the man has a magnitude of 40 m
Explanation:
Distance and Displacement
A moving object constantly travels for some distance at defined periods of time. The total distance is the sum of each individual distance the object traveled. It can be written as:
dtotal=d1+d2+d3+...+dn
This sum is obtained independently of the direction the object moves.
The displacement only takes into consideration the initial and final points of the path defined by the object in its moving. The displacement, unlike distance, is a vectorial magnitude and can be even zero if the object starts and ends the movement at the same point.
The man walks around half the circumference and ends up at the opposite side of the circled shape. Taking into consideration only the starting and ending points, the man's displacement is a vector whose magnitude is the diameter of the circle, thus:
The displacement of the man has a magnitude of 40 m
A car rolls down a hill from rest and reaches a velocity of 18.0 m/s in a distance of 25.0
m. Find the acceleration of the cart.
Answer:
I’m so sorry I tried solving it but I don’t understand it can you explain the question a little bit more ty
Explanation:
How are electromagnetic waves used in bar-code scanners?
Answer:
A barcode reader (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals.
Explanation:
A barcode reader (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals.
so like what happens if i eat a new born baby do i get super powers
Answer:
probaby not
Explanation:
you might get thrown in jail tho
Davien and Jackson are headed to a beach that is 50km from school. At noon, Davien leaves his house that is 10 km closer to the beach than the school is and moves at 40 km/h. Jackson starts from school at 12:30 P.M. And moves at 100 km/h. What time does Davien reach the beach? * Answer Format: Time
Distance between Davien's school and beach, D = 50 km.
Also, Davian's house is 10 km closer to the beach than the school.
So, distance between Davien's house and beach, d = 40 km.
Speed of Davian, s = 40 km/h.
Now, time taken is given by :
[tex]t =\dfrac{Distance}{Speed}\\\\t=\dfrac{40}{40}=1\ hour[/tex]
Therefore, Davien reach the beach at 1 : 30 P.M .
Hence, this is the required solution.
How far did the object travel by the end of eight seconds, according to the graph above?
A) It traveled 4 centimeters.
B) It traveled 8 centimeters.
C) It traveled 12 centimeters.
D) It traveled 20 centimeters.
Answer:
The object traveled 4 cm by the end of eight seconds. Correct: A)
Explanation:
Speed vs Time Graph
In a speed-time graph, speed is plotted on the vertical axis and time is plotted on the horizontal axis. If the graph is a horizontal line, the speed is constant, if the line is sloped up, the speed is increasing and the acceleration is positive and constant, and if the line is sloped down, the speed is decreasing and the acceleration is negative and constant.
The distance traveled by the object can be found by calculating the area under the graph and above the x-axis.
The graph provided shows two different zones: the first 4 seconds, the speed is constant at 1 cm/s, and the last 4 seconds, the speed is zero, i.e. the object is not moving.
The area behind the first zone is a rectangle of height 1 cm/s and base 4 sec, thus the distance is 1 * 4 = 4 centimeters.
The second zone corresponds to an object at rest, thus no distance is traveled.
The object traveled 4 cm by the end of eight seconds.
A) Correct. As shown above
B) The distance traveled is 4 cm. Incorrect
C) The distance traveled is 4 cm. Incorrect
D) The distance traveled is 4 cm. Incorrect
car jack is machine helps people do work by?
Answer:
d. changing the direction if force
kindly follow.tnx
Answer: Your answer for this question would be letter D if this is wrong let me know ok have a great day and keep the good work up.
Explanation:
Acceleration occurs when an object changes its ____________________ or ____________________ or both.
Answer:
Acceleration occurs when an object changes its VELOCITY or DIRECTION or both.
Explanation:
Answer:
When the velocity of an object changes it is said to be accelerating. Acceleration is the rate of change of velocity with time. ... Acceleration occurs anytime an object's speed increases or decreases, or it changes direction. Much like velocity, there are two kinds of acceleration: average and instantaneous. answer velocity or direction.
hope this helps!
Question 8 of 10
Which term describes the sum of all forces acting on an object
A Free body force
B. Centripetal force
0, Nat force
D. Reaction force
Answer:
Net force ! because it the total force that being addednon the obj !
you already know i dont have much time
Answer:
its option c the age of a fossil can be determined