Explanation:
chemical energy into electrical energy
mark me brainliest
i need helpp pls!!!!??????
Answer:
too hard bro others will answer it
Explanation:
sry
pls help me with this
Answer:
needle -attract
wooden spoon -repel
nails -attract
safety pins -attract
paper -repel
Explanation:
Shondra takes notes in class. I. Electromagnetic Waves II. The ability to work - Has many forms - Mechanical III. Potential energy - Chemical - Elastic - Gravitational Kinetic energy - Energy of movement - Electrical IV. Nuclear - Radiant - Thermal One line of Shondra’s notes is irrelevant to the rest of her notes. Which line is about a different topic than the rest of Shondra’s notes? I II III IV.
The waves that are related to both electricity and magnetism are known as (EM) waves .electromagnetic Waves' this line is about a different topic than the rest of Shondra’s notes.
What is an electromagnetic wave?The waves that are related to both electricity and magnetism are known as electromagnetic (EM) waves. These waves are made up of time-varying electric and magnetic fields that travel over space.
These waves, which are related to electricity and magnetism, would undoubtedly spread in space. The waves that are related to both electricity and magnetism are known as electromagnetic (EM) waves.
These waves are made up of time-varying electric and magnetic fields that travel over space. These waves, which are related to electricity and magnetism, would undoubtedly spread in space.
Hence option 1 is right because the 'Electromagnetic Waves' these line is about a different topic than the rest of Shondra’s notes.
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Determine the horizontal displacement of a projectile if it has a flight time of 8 seconds and a horizontal velocity of 14 m/s
[tex]\\ \rm\bull\rightarrowtail Displacement=Velocity\times Time[/tex]
[tex]\\ \rm\bull\rightarrowtail Displacement=8(14)[/tex]
[tex]\\ \rm\bull\rightarrowtail Displacement =112m[/tex]
If there is a new moon today, in how many days will the next full moon occur?.
What are the uses of a magnet?
Answer:
A magnet is used in a compass to show the direction.
Magnets are used in medical equipment.
Powerful magnets are used to lift objects
they are used in refrigerator, televisions, earphones etc
Answer:
1. they are used in medical equipment
2. they are used in dynamos
3. they are used in generators and motors
4. powerful magnets are used to lift heavy objects
5. they are used to prevent corrosion in a water heater
A 0.50-kg red cart is moving rightward with a speed of 40 cm/s when it collides
with a 1.50-kg blue cart that is initially at rest. The two carts stick together and
move to the right with a speed of 10 cm/s after the collision,
Enter the momentum values of each individual cart and of the system of two
carts before and after the collision. Also indicate the change in momentum of the
carts and of the system,
The momentum of the red cart before the collision is 0.2 kgm/s and the blue cart is 0.
The momentum of the red cart after the collision is 0.05 kgm/s and the blue cart is 0.15 kgm/s.
The change in momentum of the system of the carts is 0.
Initial momentum of the carts before collisionThe momentum of the carts before the collision is calculated as follows;
P(red) = 0.5 kg x 0.4 m/s = 0.2 kgm/s
P(blue) = 1.5 x 0 = 0
Momentum of the carts after collisionThe momentum of the carts after the collision is calculated as follows;
P(red) = 0.5 x 0.1 = 0.05 kgm/s
P(blue) = 1.5 0.1 = 0.15 kgm/s
Change in momentum of the carts[tex]\Delta P = P_f - P_i[/tex]
ΔP = (0.05 + 0.15) - (0.2)
ΔP = 0
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Object 1 has a mass of 3m and is moving to the right at a velocity of
4v. Object 2 has a mass of m is moving to the left at v. After the objects collide inelastically, object A is moving to the left at a velocity of v (one third of its original velocity). Derive an expression for the final velocity V of object B.
I am confused because I thought the when it is an inelastic equation, then that means that the objects stick together. So how can you find the final velocity of object B (also it shows that after the collision, the two objects to in fact split apart)?
Answer:
In a collision, the velocity change is always computed by subtracting the initial velocity value from the final velocity value. If an object is moving in one direction before a collision and rebounds or somehow changes direction, then its velocity after the collision has the opposite direction as before.
Trains A and B travel at the same constant rate in opposite directions along the same route between Town G and Town H. If Train A travels for exactly two hours before passing Train B, how long does it take Train B to travel the entire distance between Town G and Town H?
(1) Train B started traveling between Town G and Town H 1 hour after Train A started traveling between Town H and Town G.
(2) Train B travels at the rate of 150 miles per hour.
2. A 6 kg object is initially at rest. A 300 N force acts on the object, moving it forward 4 meters in
2 seconds.
a) How much work does the force do on the object?
b) How much power is exerted on the object?
c) What is the final velocity of the object?
Answer: a. 1200J b. 600W c. 20m/s
Explanation: W = Fxcos
F = 300, x=4, direction of force is = to direction of object so cos(0) = 1
a) 300*4 = 1200
b) P = W/t
1200/2 = 600W
c) vf^2 = vi^2 + 2ax
vi = 0, x = 4, a= 300/6
vf^2 = 2(50)(4)
vf^2 = 400
vf= 20m/s
It is commonplace to find statements on food cans such as “Net Weight: 16 oz. (454g)” Why do most people find this acceptable?
People find this acceptable because it is common to use mass and weight as synonyms even if they are not.
What is the difference between mass and weight?In physics, mass refers to the amount of matter, due to this, mass is often measured in:
GramsKilosTonsAmong others.On the other hand, weight considers gravity or the force gravity exerts on an object, and due to this it is measured in newtons.
Why do people find the statement “Net Weight: 16 oz. (454g)” acceptable?Even if weight and mass are different, people often use the word "weight" to refer to the mass, that is why statements such as the above are acceptable. However, if you are a physicist this would be incorrect.
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Two satellites are in circular orbits around Earth. Satellite A has speed vA. Satellite B has an orbital radius nine times that of satellite A. What is the speed of satellite B
Answer:
option B
Explanation:
given,
Satellite B has an orbital radius nine times that of satellite A.
R' = 9 R
now, orbital velocity of the satellite A
........(1)
now, orbital velocity of satellite B
from equation 1
hence, the correct answer is option B
Which statement about local and global winds is true?.
Answer:
Global winds occur in belts around the globe.
Explanation:
This is because they blow over a limited area. They are influenced by local geography, such as nearness to an ocean.
when is homeostasis important
Answer:
Homeostasis maintains optimal conditions for enzyme action throughout the body, as well as all cell functions. It is the maintenance of a constant internal environment despite changes in internal and external conditions.
A yellow train of mass 100 kg is moving at 8 m/s toward an orange train of mass 200 kg traveling in the opposite direction on the same track at a speed of 1 m/s. They collide and stick together! What is the final momentum of the new combined train?
A. 100 kgm/s
B. 600 kgm/s
C. 800 kgm/s
D. 80 kgm/s
Answer:
Let the momentum of the orange train be positive
P = 100 * 8 - 200 * 1 = 600 kg-m/s
P(final) = 600 kg-m/s
P / M = 600 kg-m/sec / 300 kg = 2 m/s
Answer-B final momentum = 600 kg-m/s
What change slowly occurs during the main-sequence lifetime of a star?.
what is the magnetic force value due to 3.5nanocoloumb charge moves to the
east with velocity of 250m/s making angle of 30 degree with the magnetic
filed (25m.T)?
The force on the charge is 1.1×10⁻⁸ N.
What is force?Force can be defined as the product of the mass of a body and its acceleration
To calculate the force on the charge, we use the formula below.
Formula:
F = qvBsin∅............. Equation 1Where:
q = chargev = velocityB = magnetic field∅ = Angle.From the question,
Given:
B = 25 mT = 0.025 Tv = 250 m/sq = 3.5 nC = 3.5×10⁻⁹ C∅ = 30°Substitute the given values into equation 1
F = (0.025)(250)(3.5×10⁻⁹)(sin30°)F = 1.093×10⁻⁸ NF ≈ 1.1×10⁻⁸ NHence, the force on the charge is 1.1×10⁻⁸ N.
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The gravitational force between a satellite and Earth’s moon is 324 N. The mass of the moon is 7. 3 × 1022 kg. If the distance from the moon to the satellite is 2. 6 × 106 m, what is the mass of the satellite? 1. 7 × 10–4 kg 2. 2 × 10–3 kg 230 kg 450 kg.
The gravitational force is s type of force that has the ability to attract any two objects with mass. The mass of the satellite will be 450 kg.
What is the gravitational force?The gravitational force is s type of force that has the ability to attract any two objects with mass. Gravitational force tries to pull two masses towards each other.
The given data in the problem is;
F is the gravitational force = 324 N,
m₁ is the mass of the moon = 7.3 * 10²²kg
r is the distance between the moon and satellite = 2.6 * 10 ⁶m.
m₂ is the mass of satelite =?
G is the gravitational constant = 6.67×10⁻¹¹
The gravitational force is given by
[tex]\rm F= \frac{Gm_1m_2}{r^2} \\\\ \rm m_2 = \frac{Fr^2}{Gm_1} \\\\ \rm m_2 = \frac{324 \times (2.6\times 10^6)^2}{6.67\times 10^{-11} \times 7.3 \times 10^22 } \\\\ \rm m_2= 450 kg[/tex]
Hence the mass of the satellite will be 450 kg.
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How many electrons does one atom of carbon share to complete its valence shell?.
Answer:
2 electrons
Explanation:
carbon has 6 and only needs 2 to get to 8
In a rocket-propulsion problem the mass is variable. Another such problem is a raindrop falling through a cloud of small water droplets. Some of these small droplets adhere to the raindrop, thereby increasing its mass as it falls. The force on the raindrop is
Fext=dpdt=mdvdt+vdmdt
Suppose the mass of the raindrop depends on the distance x that it has fallen. Then m=kx, wherek is a constant, and dm/dt=kv. This gives, since Fext=mg,
mg=mdvdt+v(kv)
Or, dividing by k,
xg=xdvdt+v2
This is a differential equation that has a solution of the form v=at, where a is the acceleration and is constant. Take the initial velocity of the raindrop to be zero.
A) Using the proposed solution for v, find the acceleration a.
B) Find the distance the raindrop has fallen in t = 2.00s.
C) Given that k = 2.00g/m, find the mass of the raindrop at t = 2.00s.
Answer:
a) a = g / 3
b) x (3.0) = 14.7 m
c) m (3.0) = 29.4 g
Explanation:
Given:-
- The following differential equation for (x) the distance a rain drop has fallen has the form:
- Where, v = Speed of the raindrop
- Proposed solution to given ODE:
v = a*t
Where, a = acceleration of raindrop
Find:-
(a) Using the proposed solution for v find the acceleration a.
(b) Find the distance the raindrop has fallen in t = 3.00 s.
(c) Given that k = 2.00 g/m, find the mass of the raindrop at t = 3.00 s.
Solution:-
- We know that acceleration (a) is the first derivative of velocity (v):
a = dv / dt ... Eq 1
- Similarly, we know that velocity (v) is the first derivative of displacement (x):
v = dx / dt , v = a*t ... proposed solution (Eq 2)
v .dt = dx = a*t . dt
- integrate both sides:
∫a*t . dt = ∫dt
x = 0.5*a*t^2 ... Eq 3
- Substitute Eq1 , 2 , 3 into the given ODE:
0.5*a*t^2*g = 0.5*a^2 t^2 + a^2 t^2
= 1.5 a^2 t^2
a = g / 3
- Using the acceleration of raindrop (a) and t = 3.00 second and plug into Eq 3:
x (t) = 0.5*a*t^2
x (t = 3.0) = 0.5*9.81*3^2 / 3
x (3.0) = 14.7 m
- Using the relation of mass given, and k = 2.00 g/m, determine the mass of raindrop at time t = 3.0 s:
m (t) = k*x (t)
m (3.0) = 2.00*x(3.0)
m (3.0) = 2.00*14.7
m (3.0) = 29.4 g
Define the LAWS OF PHYSICS. State it out in full.
BRAINLIEST WILL BE GIVEN!!!!!!
Answer:
The laws of thermodynamics define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium.
a stone is thrown at 45 degree with velocity 10m/sec.calculate the range of projectile
Answer:
As per Given Information
Angle on which the stone thrown ,theta = 45°
Velocity ,u = 10m/s
Acceleration due to gravity ,g is 10m/s²
We have to find the "Range of Projectile "
Range of projectile is denoted by R .
Using Formulae
[tex]\\ \bigstar{\boxed{\pink{\bf{R = \frac{ {u}^{2}sin2 \theta }{g} }}}} \\ \\ [/tex]
On putting the value we get
[tex] \sf\dashrightarrow \: R\: = \frac{ {10}^{2} \times sin(2 \times 45) }{10} \\ \\ \sf\dashrightarrow \: R = \frac{100 \times sin90 {}^{ \circ} } {10} \\ \\ \sf\dashrightarrow \: R \: = \frac{100 \times 1}{10} \\ \\ \sf\dashrightarrow \: R \: = \frac{100}{10} \\ \\ \sf\dashrightarrow \: R = \cancel \frac{100}{10} \\ \\ \sf\dashrightarrow \: R = 10m[/tex]
So, the range of projectile is 10m.
A 70.0 kg astronaut is training for accelerations that he will experience upon reentry. He is placed in a centrifuge (r = 10.0 m) and spun at a constant angular velocity of 16.3 rpm. Answer the following:
What is the angular velocity of the centrifuge in ?
What is the linear velocity of the astronaut at the outer edge of the centrifuge?
What is the centripetal acceleration of the astronaut at the end of the centrifuge?
How many g’s does the astronaut experience?
What is the centripetal force and net torque experienced by the astronaut? Give magnitudes and directions.
Answer:
1.3823 rad/s
20.7345 m/s
28.66129935 m/s²
2006.29095 N radially outward
Explanation:
r = Radius = 15 m
m = Mass of person = 70 kg
g = Acceleration due to gravity = 9.81 m/s²
Angular velocity is given by
Angular velocity is 1.3823 rad/s
Linear velocity is given by
The linear velocity is 20.7345 m/s
Centripetal acceleration is given by
The centripetal acceleration is 28.66129935 m/s²
Acceleration in terms of g
Centripetal force is given by
The centripetal force is 2006.29095 N radially outward
The torque will be experienced when the centrifuge is speeding up of slowing down i.e., when it is accelerating and decelerating.
How are velocity and acceleration related
Answer:
Acceleration is the rate of change of velocity. If an object is changing its velocity, its speed, or changing its direction, then it is said to be accelerating.
Explanation:
when you change directions or speed up you are accelerating (or decelerating) and when you change directions or speed its called velocity.
Walt ran 5 kilometers in 25 minutes, going eastward. What was his average velocity? 0. 17 km/min east 0. 2 km/min east 5 km/min east 25 km/min east.
Answer:
0.2 km/min east
Explanation:
Walt ran 5 kilometers in 25 min, going eastward. What was his average velocity?
m a t h
What is the meaning of the reference point in electric potential?.
Answer:
ELECTRIC POTENTIAL• the amount of work needed to move a unit charge from a reference point to a specific point against an electric field.
If a motionless table has a weight of 50 newtons, what is the value of the normal force acting on the table?
A. 0 N
B. 50 N
C. 100 N
D. This cannot be determined
Answer:
d
Explanation:
because it also depends upon accleration acting upon it
PLEASE HELPPPP!!!!
in the diagram, the direction of a current and the magnetic field around it are shown. describe what would happen to the magnetic field if you increased the number of turns in the coil and reversed the direction of the current
Answer:
more turns in a coil will make stronger magnet field and reversed direction of the current will change the pole of the magnet
Explanation:
by winding a coil , it concentrates magnetic field of the current in smaller space so more turns of coil mean stonger magnetic field.
explanation for change of direction of current is in pic.
i hope it helps.
More turns in a coil will make stronger magnet field and reversed direction of the current will change the pole of the magnet.
What is Current?By winding a coil , it concentrates magnetic field of the current in smaller space so more turns of coil mean stonger magnetic field.
In a full electrical circuit, current is the rate at which electrons move past a certain point. Current = flow, at its most fundamental level.
The international unit for measuring current is an ampere (AM-pir), sometimes known as an amp. It describes how many electrons.
In a circuit, a current of 1 ampere corresponds to the movement of 1 coulomb of electrons, or 6.24 billion billion (6.24 x 1018) electrons, through a single location in a second.
Therefore, More turns in a coil will make stronger magnet field and reversed direction of the current will change the pole of the magnet.
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A 300 kg snowmobile is traveling at 30 m/s. How fast would a 200 kg snowmobile need to travel to have
the same momentum?
A 200 kg snowmobile having the same momentum will travel at 45 m/s.
What is momentum?Momentum of an object is the product of mass and speed of an object.
P = mv
where;
m is mass of the objectv is speed of the objectm₁v₁ = m₂v₂
v₂ = m₁v₁/m₂
v₂ = (300 x 30)/200
v₂ = 45 m/s
Thus, a 200 kg snowmobile having the same momentum will travel at 45 m/s.
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Light with a wavelength of about 490 nm is made to pass through a diffraction grating. The angle formed between the path of the incident light and the diffracted light is 9. 2° and forms a first-order bright band. What is the number of lines per mm in the diffraction grating? Round your answer to the nearest whole number. Lines per mm.
A diffraction grating is a type of optical instrument obtained with a continuous pattern. The number of lines per mm in the diffraction grating is 326.
What is diffraction grating?A diffraction grating is a type of optical instrument obtained with a continuous pattern. The pattern of the diffracted light by a grating depends on the structure and number of elements present.
The given data in the problem is
[tex]\theta[/tex] is the angle formed between the path of the incident light and the diffracted light = 9. 2°
λ is the wavelength of the light=490nm=4.9
N is the number of lines per mm in the diffraction grating=?
n is ordered = 1
The formula for diffraction grating will be
[tex]\rm n\lambda=dsin\theta\\\\ \rm d=\frac {n \lambda}{sin\theta} \\\\ \rm d=\frac {1\times4.90\times10^{-7}}{sin9.2^0} \\\\\rm d=3.06\times10^{-6}m=3.06\times10^{-3}mm[/tex]
The number of lines per mm is the inverse of the distance between grating in mm.
[tex]\rm N=\frac{1}{d}[/tex]
[tex]\rm N=\frac{1}{3.06\times10^-3}\\\\\rm N=326.8/mm[/tex]
Hence the number of lines per mm in the diffraction grating is 326.
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Answer:
326
Explanation:
