Answer:
Object, starting from rest, will fall at 137.34m/s after 14s.
Explanation:
Assuming that the object falls from rest (ie it's dropped, not thrown), initial velocity, u, is equal to 0m/s.
Assuming this object is falling on earth, the acceleration it undergoes due to gravity, a, is equal to 9.81m/s².
We are looking for v, the final speed at t=14s.
v=u+at
=0+(9.81)(14)
=137.34m/s
Calculate the kinetic energy of a truck that has a mass of 2400kg and is moving at 15m/s
Answer:
Given,
Explanation:
mass(m)=2400kg
velocity(v)=15m/s
kinetic energy(K.E.)=1/2mv2
KE=1/2×2400×15^2
=1/2×540000
=270000Joule
The distance between two stations is 180 km. A train takes 2 hours to cover this distance. The speed of the train in m/sec is
Will give brainliest
Answer:
40.2336
Explanation:
If you walked 8m north and then 3m south your displacement is
Answer:
Displacement = 8.54m
Explanation:
Let n = North direction
Let s = South direction
Resultant displacement, R =?
Displacement can be defined as the change in the position of a body or an object. It is a vector quantity because it has both magnitude and direction.
Given the following data;
n = 8m
s = 3m
The magnitude of displacement or resultant displacement is given by the formula below;
R² = n² + s²
R² = 8² + 3²
R² = 64 + 9
R² = 73
Taking the square root, we have;
R = 8.54m
A 2.00 kg cart on a frictionless track is pulled by force of 3.00 N. What is the acceleration of the cart?
fun facts are,
Butterflies taste with their hind feet.
A group of crows is called murder.
Tomato sauce was sold in the 1800's as medicine.
A donkey will sink in quicksand, but a mule won't.
Lakes Can Explode. ...
Earth Used to Be Purple. ...
60 Tons of Cosmic Dust Fall to Earth Daily. ...
The Oceans Hold $771 Trillion Worth of Gold. ...
Earth Once Had Two Moons. ...
Earth Might Still Have Two Moons. ...
The Greatest Vertical Drop Is in Canada. ...
The Hottest Spot in the World Is in California.
Answer:
that is cool and i have one interesting fact
Explanation: North Korea and Cuba are the only places you can't buy Coca-Cola
Q1. A force has no effect on
a) Mass
b) Density
of the body on which it is applied.
c) Weight
d) State
Q2. A force has
a) Magnitude
b) Direction
c) Both
d) None of these
Q3. When two equal forces act on a body but in the opposite direction, the net force on the body
is
b) Zero
c) Constant
d) Equal
a) One
Q4. The
a) Mass
of a body is the force which the earth pulls the body.
b) Weight
c) Height
d) None of these
Q5. When a force is applied to a body at rest, it begins to
a) Move
b) Stay at rest c) Break apart
d) None of these
Q6. In a magnet the like poles
a) Attract b) Falls
c) Spins
d) Repel
Q7. When a body does not change its position with respect to its surroundings, it is said to be at
a) Motion
b) Rest
c) Flying
d) Spinning
PLEASE HELP DUE SOON
Answer:
29 m/s east
Explanation:
Hope this helps :]
What type of meter would be connected on both sides of a resistor in a
circuit?
hs
O A. A voltmeter, which measures potential difference
B. An ammeter, which measures potential difference
O C. An ammeter, which measures current
O D. A voltmeter, which measures current
Answer:
A voltmeter, which measures potential difference
Explanation:
You normally want to measure the drop of potential that takes place with current running through a resistor. and for that purpose use a voltmeter connecting one lead to one end of the resistor, and the other lead on the other end.
g The tires of a car make 75 revolutions as the car reduces its speed uniformly from 91 km/h to 48 km/h . The tires have a diameter of 0.78 m . Part A What was the angular acceleration of the tires
Answer:
α = -0.01625 rad / s²
Explanation:
This is an exercise in angular kinematics, we can use the relation
w = w₀ + 2 α θ
linear and angular variables are related
v = w r
w = v / r
Let's reduce the magnitudes to the SI system
v₀ = 91 km / h (1000m / 1km) (1h / 3600s) = 25.278 m / s
v = 48 km / h = 13,333 m / s
θ = 75 rev (2π rad / 1 rev) = 471.24 rad
Let's find the angular velocities
w₀ = v₀ / r
w₀ = 25.278 / 0.78
w₀ = 32,408 rad / s
w = v / r
w = 13.333 / 0.78
w = 17.09 rad / s
we calculate the angular acceleration
α = (w- w₀) / 2θ
α = (17.09 - 32.408) / (2 471.24)
α = -0.01625 rad / s²
the negative sign indicates that the wheel is stopping
A wheelbarrow is an example of which simple machine?
O pulley
O lever
O screw
wheel and axel
The standard kilogram is a platinum-iridium cylinder 39.0 mm in height and 39.0 mm in diameter. What is the density of the material?
Density is mass per unit of volume, usually measured in g/cm³. So first determine the volume of the cylinder:
v = π r ² h = π ((39.0 mm) / 2)² (39.0 mm)
v = 59,319/4 π mm³ ≈ 46,589 mm³ ≈ 46.589 cm³
Then the density is
ρ = m / v
ρ = (1 kg) / v = (1000 g) / v
ρ ≈ 21.464 g/cm³
Or, if you want to preserve the given units, that's
ρ ≈ 0.00002146 kg/mm³
A ball at the end of a string is swinging in a horizontal circle of radius 0.85 m. The ball makes exactly 3 revolutions per second. What is its centripetal acceleration?
Answer:
It's centripetal acceleration is 301.7 m/s²
Explanation:
The formula to be used here is that of the centripetal acceleration which is
ac = rω²
where ac is the centripetal acceleration = ?
ω is the angular velocity = 3 revolutions per second is to be converted to radian per second: 3 × 2π = 3 × 2 × 3.14 = 18.84 rad/s
r is the radius = 0.85 m
ac = 0.85 × 18.84²
ac = 301.7 m/s²
It's centripetal acceleration is 301.7 m/s²
A 35 N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface and the block are 0.6 and 0.3, respectively. A horizontal string is attached to the block and a constant tension is maintained in the string. What is the force of friction acting on the block if the tension is 16 N? Answer in units of N.
What is the force of friction acting on the block if the tension is 38 N? Answer in units of N.
Answer:
(a) Frictional Force = 16 N
(b) Frictional Force = 10.5 N
Explanation:
(a) FOR TENSION OF 16 N:
First we find the static friction force (Fst):
Fst = (μs)(W)
Fst = (0.6)(35 N)
Fst = 21 N
Since, Tension < Fst
Frictional Force = Tension
Frictional Force = 16 N
(b) FOR TENSION OF 38 N:
Since, Tension > Fst
Frictional Force = Kinetic Friction = (μk)(W) = (0.3)(35 N) =
Frictional Force = 10.5 N
What type of electric current does a power plant generate for use in your home?
А. direct
B. alternating
C. repeating
D. straight
Answer:
B........................
5
b. What is the molecular shape of the molecule? (3 points)
Answer:
tetrahedral shape.
Explanation:
Answer:
Molecular Geometries. The VSEPR theory describes five main shapes of simple molecules: linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral. Apply the VSEPR model to determine the geometry of molecules where the central atom contains one or more lone pairs of electrons.
What are not true about pure substances?
An increase in thermal energy leads to ?
Answer:
An increase in heat and an increase in kinetic energy until a phase change occurs.
An increase in heat and an increase in kinetic energy until a phase change occurs.
What is thermal energy?
The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted across various systems and how work is performed in the process.
Mechanical energy, also known as kinetic energy or potential energy, is the energy that an object possesses when it is in motion or the energy that an object stores due to its position. Renewable energy is also fueled by mechanical energy.
An increase in heat and an increase in kinetic energy until a phase change occurs.
To learn more about thermal energy refer to the link:
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#SPJ5
4)
0
2
3
4
5
6
-10
time (s)
-20
velocity (m/s)
30
-40
-50
-60
Consider the graph showing free fall What statement BEST describes the forces acting on the object in free fall?
A)
Net force equals zero
B)
Net force is positive, downward.
C)
There is no way to determine net force.
D)
Net force is positive and to the right.
Answer:
net force is positive downward..B
Define in your own words what Economics is about?
Answer:
Economics definition, the science that deals with the production, distribution, and consumption of goods and services, or the material welfare of humankind.
The type of Atom you have is determined by what?
A. The atomic number
B. The mass number
C. The electron number
D. The isotope number
Answer:
the atom number
Explanation:
atoms are determend by the numbers of protons in their core, as the number of protons determines what type of element the atom will be (noble gasses, Alkali Metals, Other Metals) and the atom number involves both protons and neutrons
Also spelling may be bad, as Grammarly dosen't work with brainly at all. and if its right brainlist plz (´～｀ヾ)
Answer:
The atomic number
1. What is an asteroid that is pulled off course by a planet's gravity and orbits around that planet called
Answer:
I don't know but take a guess from these
Explanation:
Trojan Asteroids
Moons
Satellites
trojan asteroids revolves around the planet due to gravitational force of that planet.
An asteroid that is pulled by a gravitational force of planet and orbits around that planet is called trojan asteroids. These trojan asteroids are present around the Jupiter planet. The Jupiter has a large population of trojan asteroids revolving around the planet.
The gravitational force of the planet compels the asteroid to move around the planet and prevent it from going away to the atmosphere so we can conclude that trojan asteroids revolves around the planet due to gravitational force of that planet.
Learn more: https://brainly.com/question/19100041
When a wave passes through a medium, how do particles in the medium move? Text to speech
A:A. The particles in the medium are pushed aside by the wave.
B:B. The particles in the medium stay in about the same place.
C:C. The particles in the medium move around the wave.
D:D. The particles in the medium are carried by the wave from one place to another.
Answer:
A. The particles in the medium are pushed aside by the wave.
Explanation:
When a wave passes through a medium, how do particles in the medium move the particles in the medium are pushed aside by the wave.Thus the correct answer is A.
Know more :
https://brainly.com/question/14621669?referrer=searchResults
A 50 kg mass is placed 2 meters from the fulcrum. To balance the lever, a second object is placed 4 meters
from the fulcrum. What is the mass of the second object?
Answer:
mass =25 kg
using clockwise moment = anticlockwise moment
A cliff diver running 3.60 m/s dives out horizontally from the edge of a vertical cliff and reaches the water below 2.00 s later. How
high is the cliff and how far from the base of the cliff did the diver hit the water?
Help asap
Explanation:
It is given that,
The horizontal speed of a cliff diver, [tex]v_x=3.6\ m/s[/tex]
It reaches the water below 2.00 s later, t = 2 s
Let [tex]d_x[/tex] is the distance where the diver hit the water. It can be calculated as follows :
[tex]d_x=v_x\times t\\\\=3.6\times 2\\\\=7.2\ m[/tex]
Let [tex]d_y[/tex] is the height of the cliff. It can be calculated using second equation of motion as follows :
[tex]d_y=u_yt+\dfrac{1}{2}gt^2\\\\d_y=\dfrac{1}{2}\times 9.8\times 2^2\\\\=19.6\ m[/tex]
So, the cliff is 19.6 m high and it will hit the water at a distance of 19.6 m.
The height of the cliff is 19.6m and the base of the cliff did the diver hit the water is 7.2m
The distance at the base of the cliff did that the diver hit the water is the horizontal distance. This is expressed as:
[tex]distance=speed \times time[/tex]
[tex]d_x = vt[/tex]
Given the following parameters
Speed v = 3.60m/s
Time t = 2.0s
Substitute into the formula to have:
[tex]d_x = 3.6 \times 2\\d_x = 7.2m[/tex]
The height of the cliff will be the vertical height derived according to the Newton's law of motion:
[tex]h_y=ut+\frac{1}{2}gt^2\\h_y=0(t) + \frac{1}{2}gt^2\\h_y= \frac{1}{2}(9.8)(2)^2\\h_y=4.9(4)\\h_y=19.6m[/tex]
Hence the height of the cliff is 19.6m
Learn more here: https://brainly.com/question/8898885
Einstein’s principle of equivalence states:
A) the gravitational constant is the same everywhere in the universe
B) it is impossible to tell the difference between gravitational force and the normal force
C) every mass exerts a gravitational force on every other mass
D) gravitational mass and inertial mass are the same
E)the laws of physics are the same in all inertial reference frames
Mario places 10 mL of water in a test tube and heats the liquid over a Bunsen burner for 2 minutes. After removing the test tube from the Bunsen burner, there are 6 mL of water left in the test tube. This experiment is a good example of a
Answer:
water cycle your welcome
Answer:
This experiment is a good example of a water cycle
Explanation:
An electric motor uses___?
Question 4 options:
visible light to produce mechanical energy
mechanical energy to produce sound
mechanical energy to produce electricity
electrical energy to produce mechanical energy
Answer:
D: electrical energy to produce mechanical energy
Explanation:
An electric motor is a device that transforms electric energy into kinetic energy: the energy of MOTION (a type of mechanical energy)
When an electric current travels through the wires, an electromagnet is created. It then interacts with the permanant magnets on the outside, which causes the axle to ROTATE. (movement)
Hope this helps!
A constant horizontal force of 5.2 newtons is applied to a wooden block to slide it at constant speed across a wooden table. Calculate the weight of the block
7 N
14 N
34 N
17 N
Answer:
Not enough information.
Explanation:
∑F=ma
Fa-Ff=0
Fa=Ff
Fa=μN
N=Fa/μ
You don't have enough information, you need the frictional coefficient.
Answer: 17N
Explanation:
F(applied)-F(friction)=0
F(applied)=F(friction)
F(applied)= μmg
According to the reference table wood against wood is 0.3
So:
5.2N=0.3mg
17=mg
17=weight
Evaluate (2-3)^(4) - 9 - 3.
-7
VX
-2.
1
2
Answer:
−10.1−3.−7VX,2
Explanation:
Answer:
Evaluate (2 - 3)4(4) - 9 ÷ 3.
-7
-2
1
2
Explanation:
answer is 1
even thouugh the phone is ringing, no sound comes out of the jar. what does this tell you about the space inside the jar?
