Answer:
Explanation:
A force of 1.6 N is needed to stretch a spring 0.8 meter
spring constant = force / extension
k = 1.6 / .8 = 2 N/ m
potential energy PE = 1/2 k X² where X is extension
= .5 x 2 x .8²
= .64 J .
How long will it take for a 1.5A current to coat evenly a layer of copper 0.1mm thick on both sides of a 12cm x 12cm copper plate [e.C.E of copper= 0.00033g/C , density of copper 9g/cm
Answer:
Explanation:
First of all we shall calculate mass of copper to be calculated from the formula below.
mass = volume x density
volume = total surface area x thickness of layer
= 12 x 12 x 2 x .01 cm³
= 2.88 cm³
mass = 2.88 x 9 = 25.92 g .
Let time required be t s . .
charge flowing in time t = 1.5 t coulomb.
Given ,
1 coulomb deposits .00033 g of copper
1.5 t deposits .00033 x 1.5 t g of copper
So ,
.00033 x 1.5 t = 25.92
t = 52364 s
= 14.54 hours.
Visible light waves do not diffract as well as radio waves because?
Answer:
because the wavelength of the light waves are too small
Explanation:
Write the cautions which are taken to keep the magnetic properties of magnetsa) Don’t hammer it b) don’t drop it c) don’t heat it d) all of these
PLS HELP GUYS ITS URGENTTT!! I AM IN CLASS ...PLEASE!!
Answer:
D
Explanation:
These all can impact the magnetic properties
What is the reason so many poisonings go undetected at first?
A ball is dropped over the edge of a building. How fast is the ball moving 2.0 seconds
after being dropped?
Answer:-20.m/s,drum
Explanation:
What happens when light runs into object
Explanation:
It depends on the object, actually. If the object is transparent or somewhat clear, the the light will end up refracting, or bending, through those clear objects. It can also bounce off objects, too. But, with some objects, the light can be blocked, or absorbed.
Answer:
See down below
Explanation:
When light hits glass or any other transparent material, it pass though. Some light is reflected off the object whereas the rest passes through and is refracted. As light passes through air and into another clear material it changes speed, and light is both reflected and refracted by the glass.When the light runs into a sold object, it prevents from going through it.
please help is due for tomorrow please solve from the graph
Answer:
its constant
Explanation:
i think its 0
Which of the following is not a benefit of improved cardio-respiratory fitness?
A. Resting blood pressure goes up
B. The heart becomes more efficient
C. Less risk of an early death
D. Calories are burned and body fat decreases
What are the layers of the Sun, starting from the center and moving outward?
Answer:
There are three main parts to the Sun's interior: the core, the radiative zone, and the convective zone. The core is at the center. It the hottest region, where the nuclear fusion reactions that power the Sun occur. Moving outward, next comes the radiative (or radiation) zone.
Answer:
B.core, radiative zone, convective zone, and photosphere
Explanation:
Edge 2021
Which has more heat, a home oven at 500 degrees Celsius, or a one ton commercial oven at 500 degrees celsius?
A compass can be used to determine the presence of charge flow in a circuit.
-true
-false. only the bulbs can tell you if there is charge flow.
Answer:
False
Explanation:
A compass can be used to determine relative direction but not absolute direction.
true or false, russian twists focus to strengthen the latissimus dorsi
I WILL GIVE BRAINLIEST!!!
Answer:
B
Explanation: HELP ME PLEASE, WRITE A ONE PAGE ESSAY TO EXPLAIN THE AUTHOR'S PURPOSE IN WRITING HOM SMART ARE ANIMAL
URGENT
Which phrase describes a current
A)todays newspaper
B)Still bathtub water
C)the latest fashion
D)water flowing in a continuous path
Answer:
D. water flowing in a continuous path
Explanation:
The definition of a current is shown; water flowing in a continuous path.
04 What is the pressure 40m under the sea if sea water has a density of 1100kg/m3? (atmospheric pressure is 101kPa)
the answer is 104 atm I hope this helps!
A 70.0kg person walks from the ground to the roof of a 25.3 m tall building. How much gravitional Potential Energy does she have at the top of the building.
A-17,394.4
B/18,865.8 J
C-17,355.8 J
D-12,873.2 J
Answer:
i would say C
Explanation:
if im right can i get the crown?
-A car carries a speed of 25 km/h at 6 seconds, its speed is 70km/h.
Calculate your acceleration.
Answer:
2.08m/s^2
Explanation:
a=vf-vi/t
=19.44-6.944/6
=2.08
What does it mean to go 20 m/s?
Answer:
to go 20 m/s means that the body travels 20 metres of distance in each second.
Hope it will help :)
Which tennis tournament is considered the Grand Daddy of them all?
Answer:
Wimbledon
Explanation:
An apple in a tree has a gravitational potential energy of 17.5 J and a mass of 0.36 kg. About how high from the
ground is the apple?
Answer:
Answer: The height of the apple from the ground is at 49552.61071 m or is approximately at 5.0 × 10 m.
A car of mass 1000kg is moving at 10m/s when it hits a wall. The force of the car on the wall is 400 N. Calculate the stopping time
Answer:
25s
Explanation:
Given parameters:
Mass = 1000kg
Velocity = 10m/s
Force = 400N
Unknown:
Stopping time = ?
Solution:
To find the stopping time, we use Newton's second law of motion:
Ft = mv
F is the force
t is the stopping time
m is the mass
v is the velocity
400 x t = 1000 x 10
t = 25s
3. What is the role of neutrons in the nucleus?
Answer:
The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Explanation:
:) Good luck my friend
When the south poles of two bar magnets are brought close together,
there will be: *
a) a force of attraction.
b) a force of repulsion.
c) an upward force.
d) no forces
there will be
a)Aforce of attraction
25 points please help
In the chemical reaction CH4 + 2O2 → CO2 + 2H2O, there are reactants on the left of the equation and products on the right. If you count the atoms in the reactants, there are
a. 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
b. 1 carbon atom, 4 hydrogen atoms, and 2 oxygen atoms
c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
d. 4 carbon atoms, 4 hydrogen atoms, and 4 oxygen atoms
Answer:
the answer is A. 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
The number of atoms of each molecule of the reactants is required.
The correct option is c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
The given reaction is
[tex]CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
For carbon atoms
The only carbon atom is present in [tex]CH_4[/tex]
So, 1 carbon atom
The hydrogen atoms are also present is [tex]CH_4[/tex]
There are 4 hydrogen atoms.
The oxygen atoms present is [tex]2\times 2=4[/tex]
So, the number of atoms present in the reactants are c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
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A 20 N force acts for 10 s on a skateboard. What is the impulse imparted to the skateboard? What is the skateboard’s change in momentum?
Answer:
impulse = force * time = 20 * 10 = 200 Ns
change in momentum = impulse = 200 kgm/s
Nearly all volcano and earthquakes activity happen where
4
Select the correct answer.
What does the number, or density, of field lines on a source charge indicate?
OA
direction of charge on the source charge
B.
amount of charge on the test charge
Oc.
amount of charge on the source charge
OD
direction of charge on the test charge
Reset
Next
Answer:
C. amount of charge on the source charge.
Explanation:
Electric field lines can be defined as a graphical representation of the vector field or electric field.
Basically, it was first introduced by Michael Faraday and it is typically a curve drawn to the tangent of a point is in the direction of the net field acting on each point.
The number, or density, of field lines on a source charge indicate the amount of charge on the source charge. Therefore, the density of field lines on a source charge is directly proportional to quantity of charge on the source.
The ball starts to move when the mallet applies a net force to it, as explained by ___
Answer:
newton's second law
Explanation:
newton's laws of motion states that if a resultant force acts on an object then it will accelerate in the direction of the resultant force
hope this helps
please mark
indicate the type of wave motion of a flag waving in a breeze
Answer:
Transverse waves, because the motion of the wave is perpendicular to the direction of propagation. An S-wave is an example of a transverse wave.
Explanation:
Lightning flashes and you hear a thunder clap for seconds later. the velocity of sound is 340 m/s. how far away did lightning strike ?
Answer:
For metric-system conversions, follow this method: Sound travels at about 340 m/s, so multiply the number of seconds you counted by 340, and you'll know how many meters away lightning struck. A three-second count, then, would place the lightning strike about 1,020 m away, or roughly 1 km.
Explanation:
hope it hep and if it doesnt sorry
The distance struck by the lighting flashes is 680 m.
The given parameters;
time taken to hear the thunder clap, t = 4 svelocity of sound, v = 340 m/sThe distance struck by the lighting is calculated by applying the principle of echo as follows;
[tex]v = \frac{2d}{t} \\\\2d = vt\\\\d = \frac{vt}{2} \\\\d = \frac{340 \times 4}{2} \\\\d = 680 \ m[/tex]
Thus, the distance struck by the lighting flashes is 680 m.
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