Answer:
The correct answer is: A HARD DISK
Explanation:
Magnetic Disc stores data of different types and formats that can always be edited or erased at any time. An example of a Magnetic Disc is a Hard Disk.
A hard disk is a type of magnetic storage device inside a computer that store data magnetically usually for the long-term and it could store a large volume of data, though that depends on the size, because it comes in various size. However, it generally allows stored data to be retrieved easily.
A construction worker drops a hammer from a 15 m high building. How fast is it going before it hits the ground?
Answer:
12.1 m/s
Explanation:
v^2-u^2=2as
v^2-0=g(15)
How do the gravitational potential energy and the kinetic energy of the ball change as the ball rolls down the ramp?
Explanation:
The gravitational potential energy is given by :
P = mgh
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
As the ball reaches the bottom of the ramp, its potential energy decreases and kinetic energy increases.
It imply that, when the ball at the top most height, its gravitational potential energy is maximum and zero kinetic energy and when ball reaches the bottom of the ramp, it will have maximum kinetic energy and zero potential energy.
What is the electrical force between 91 and 92? Recall
that k = 8.99 * 109 Nom?
2 m
9, +6 C
9,=-40
+1 m +
O 4.3 x 1010 N
q = +3 C O 3,5 x 1010 N
O -5.4 x 1010 N
O -5.8 x 10101
Answer:
F = 5.39 x 10¹⁰ N
Explanation:
The electrical force between q₁ and q₂ can be calculated by Coulomb's Law:
[tex]F = \frac{kq_1q_2}{r^2}\\\\[/tex]
where,
F = electrical force = ?
k = Coulomb Constant = 8.99 x 10⁹ Nm²/C²
q₁ = first charge = +6 C = 6 C
q₂ = -4 C = 4 C
r = distance between charges = 2 m
Therefore,
[tex]F = \frac{(8.99\ x\ 10^9\ N.m^2/C^2)(6\ C)(4\ C)}{(2\ m)^2}\\\\[/tex]
F = 5.39 x 10¹⁰ N
Answer:
C on edge
Edge2021
What force can be seen when North Pole is brought near to South Pole
Answer:
Explanation:
The answer is magnetic force
Answer:
Magnetic forces which causes attraction between the two poles
3. a) Your body is made up of several simple machines that help you move. Identify three
parts of your body that act as simple machines. Identify the kind of machine for each one
and explain what it does.
Answer:
Explained below
Explanation:
1) The human arm: This is a type of simple machine called "Lever". In this type of machine, the elbow acts as the fulcrum, the palm serves as the load because that's where we place the load we want to carry. While the inner part of the arm which is the inner part of the elbow represents the effort because that is the joint we mover when making use of our arms.
2) Pulleys: An example of this in the human body is the knee cap where the direction of an applied force is changed. Thus means as it is in motion, it alters the direction for which the quadriceps tendon pulls on the tibia.
3) wheel and axle: An example of this in the human body is the lateral rotation of the shoulder joint medial. The humerus which is the bone between the shoulder and elbow will act as the axle while the rotator will be the will because when it is rotated a little bit, the humerus will move along with it.
The increase in resistant strains of insects to chemicals is a result of:
A. natural selection creating new organisms
B. evolution of new species
C. increase in those offspring who inherited resistant traits from their parents
D. all of the above
Answer:
answer D. all of the above
What is the wavelength of a sound wave that has a speed of 340 m/s and a frequency of 880 Hz?
Answer:
Explanation:Wave length of a sound wave = speed / frequency1) 340 m/s / 880 Hz
Answer:
0.386m
Explanation:
Speed
Wavelength = -----------------
Frequency
340m/s
Wavelength = -------------- = 0.386m
880 Hz
Who wants to do my missing physics work
Answer:
WHAT IF I HATE PHYSICS ?draw the graph of the cooling curve of Naphtalene; hence discuss the cooling curve of Nephtalene
Answer:
soory but i cant under stand it proper can explain
A mercury in barometer shows a height of 70cm.What height would be shown in the barometer at the same place if water density 1.0×10³kg/m³ is used(denssity of mercury=13600kgm-³)
Answer:
P = d g h pressure due to density of liquid of height h
d1 g h1 = d2 g h2 since P1 equals P2
d1 h1 = d2 h2 and the density of Hg is 13.6 times that of water
h2 = (d1 / d2) * h1 = 13.6 * 70 cm = 952 cm or 9.52 m
ok this is the one i need help with but no
links bc i know its viruses
Answer:
polar covalent bonding
Explanation:
Water (H2O) is polar because of the bent shape of the molecule. The shape means most of the negative charge from the oxygen on side of the molecule and the positive charge of the hydrogen atoms is on the other side of the molecule. This is an example of polar covalent chemical bonding.
A 110 kg fire-fighter descends down a pole. He experiences 530N of
friction.
d. Determine the fire-fighters weight
e. Draw an FBD
f. Determine the Fnet
1. Explain how applied heat works between and at critical temperatures.
2. Explain how a refrigerator works to cool down warm objects that would otherwise be i
temperature.
3. Fill in the chart below to identify the name of the process that explains the state of cha
indicated, the states of matter being changed, or the points at which the process occu
Answer:
More heat is required for the change of state.
Explanation:
Applied heat works at critical temperatures because at this point more heat is needed by the substance in order to change the state of substance. At critical temperatures, the substance can't melt if no more heat energy is given to the substance. A refrigerator works to cool down warm objects by absorbing heat from the inside portion of the fridge and provides cool air which cools the inner side of the fridge. The point at which a solid changes into a liquid state is called melting point while on the other hand, the point at which a liquid changes into a gaseous state is known as boiling point of a substance.
If object A is half the mass of object B, then is it possible for them to have the same momentum
Of course !
Object-A just has to move twice as fast as Object-B.
Scott is making a chart to show the difference between chemical reactions and nuclear reactions. Which part of his chart is incorrect? Chemical Reaction Nuclear Reaction Line 1 Happens in the nucleus of atoms Happens between atoms Line 2 Forms new compounds Forms new atoms and radioactive particles Line 3 Involves small amounts of energy Involves large amounts of energy
Answer:
The incorrect part of the chart is;
Line 1
Chemical [tex]{}[/tex] Reaction [tex]{}[/tex] Nuclear Reaction
Line 1 Happens in the nucleus of atoms [tex]{}[/tex] Happens between atoms
Explanation:
The given chart can be presented as follows;
Chemical Reaction [tex]{}[/tex] Nuclear Reaction
1. Happens in the nucleus of atoms [tex]{}[/tex] Happens Between atoms
2. Forms new compounds [tex]{}[/tex] Forms new atoms
3. Involves small amounts of energy [tex]{}[/tex] Involves large amounts of energy
From the above chart, line 1 is incorrect because a chemical reaction happens between the valence electrons of the reacting atoms while a nuclear reaction is the reaction that takes place between the nucleus of two or more atoms or the nucleus of an atom and a subatomic particle to produce one or more than new nuclide of a new atom with a change in the mass of the nucleus being represented by the large amount of energy in the reaction. Therefore, a nuclear reaction takes place in the nucleus of an atom, forms new atoms and involves large amounts of energy
The correct arrangement is presented as follows;
Chemical Reaction [tex]{}[/tex] Nuclear Reaction
1. Happens Between atoms [tex]{}[/tex] Happens in the nucleus of atoms
how far will an automobile move if 168000 j of work is created by 2000 n of force
Answer:
Distance = 84 meters
Explanation:
Given the following data;
Work done = 168,000 Joules
Force = 2,000 Newton
To find the distance covered by the automobile, we would use the formula;
[tex] Workdone = force * distance [/tex]
Substituting into the formula, we have;
[tex] 168000 = 2000 * distance [/tex]
[tex] Distance = \frac {168000}{2000} [/tex]
Distance = 84 meters
a rectangular tank measures 12.5 metres long 10.0 wide and 2.0 metre high calculate the mass of the water in the tank when it is full the density of water 1000 kg per metre cube assume the measurement are internal
Answer:
250000kg
Explanation:
Mass =density * volume
Density=1000kg/m³
Volume=l*w*h
12.5*10.0*2.0=250m³
Mass=1000 *250
=250000kg
- 3000 J of work is done on a 2kg object over a distance of 10m. What is the force acting on the object?
A.1500N
B.300N
C.3000N
D.600ON
help me plsss! no links
Answer:
a is the answer to the question
Roark saw Alejandro sitting by himself in the quad and leaning over, with his head resting on the heels of his hands. Roark approached him and said, "Hey Alejandro, you look sad." Alejandro responded, "Huh? No, I'm just thinking." Which difficulty in interpreting nonverbal behavior does this exchange exemplify?
A. Nonverbal messages are often ambiguous.
B. Nonverbal messages are continuous.
C. Nonverbal cues are multichanneled.
D. Nonverbal interpretation is culture-based.
Answer:
Option A
Explanation:
Nonverbal communications are ambiguous because some times the face expressions (non verbal signals – Sad face or sitting alone gesture of Alejandro) and the verbal signals (communication between Roark and Alejandro) do not match or contradict each other. Some people prefer to believe on their interpretations of the nonverbal signals as compared to that of the verbal signals
Hence, option A is correct.
As a projectile travels down its trajectory path, it covers _____.
A. more distance each second
B. a distance that depends on how it was dropped
C. the same amount of distance each second
D. less distance each second
Answer:
it is C.
definitely C
Explanation:
if I am right.
plz help me out and give brainliest
A 30.0 kg rock falls from a 35.0 m cliff. What is the kinetic and potential energy when the rock has fallen 12.0 m?
Answer:
When the rock has fallen 12.0 m;
The kinetic energy of the rock is approximately 3,531.6 J
The potential energy of the rock is approximately 6,768.9 J
Explanation:
The question relates to the characteristic constant total mechanical energy of a body
The mass of the rock that falls, m = 30.0 kg
The height of the cliff from which the rock falls, h₁ = 35.0 m
The required information = The kinetic and potential energy when the rock has falling 12.0 m
The kinetic energy is given by the formula, K.E. = 1/2×m×v²
The potential energy is given by the formula, P.E. = m·g·h
Where;
g = The acceleration due to gravity ≈ 9.81 m/s²
The velocity of the rock after falling through a given height, h is given by the formula, v² = 2·g·Δh
The total mechanical energy of the rock, M.E. = K.E. + P.E. = Constant
At the height of the cliff before falling, Δh =0, therefore v₁ = 0, therefore, K.E. = 1/2×m×v₁² = 0 J
The potential energy at the cliff before the rock begins to fall, P.E. is goven as follows;
P.E. = 30.0 kg × 35.0 m × 9.81 m/s² = 10,300.5 J
At the top of the cliff, M.E. = K.E. + P.E. = 0 J+ 10,300.5 J = 10,300.5 J
∴ M.E. = 10,300.5 J
When the rock has fallen, 12.0 m, Δh = 12.0 m, the speed of the rock, v₂, is given as follows;
v₂² = 2 × 9.81 m/s² × 12.0 m = 235.44 m²/s²
v₂ = √(235.44 m²/s²) ≈ 15.344 m/s
∴ When the rock has fallen 12.0 m, K.E., is given as follows;
K.E. = 1/2×m×v₂²
K.E. = 1/2 × 30.0 kg × 235.44 m²/s² = 3,531.6 J
When the rock has fallen 12.0 m the kinetic energy, K.E. = 3,531.6 J
When the rock has fallen 12.0 m, M.E. = P.E. + K.E.
M.E. = Constant = 10,300.5 J
K.E. = 3,531.6 J
∴ 10,300.5 J = P.E. + 3,531.6 J
P.E. = 10,300.5 J - 3,531.6 J = 6,768.9 J
∴ When the rock has fallen 12.0 m, the potential energy, P.E. = 6,768.9 J.
Which layer of the earth is the thickest?
A) Crust
B) Mantle
C) Outer core
D) Inner core
C) OUTER CORE
IT IS THE THICKEST
Which best describes the effect of force on the motion of an object
Answer:
change of speed or direction
A body falling freely on the moon the acceleration due to gravity there is 1.7 m/s2.
a. its displacement at t = 3s
b. the time for it to reach a speed of 25 m/s
c. the time required for it to fall 300 m
d. its speed after falling 70 m
Answer:
a) 7.65 m
b) 14.71s
C) 15.43 m/s
Explanation:
a) s = ut + 0.5at²
s= ?
u = 0
t = 3s
a = 1.7 m/s²
s = 0 + 0.5 × 1.7 × 3²
s = 7.65 m
b) v = u + at
v = 25m/s
u = 0 m/s
a = 1.7 m/s ²
t = ?
v=at
t = v / a
t = 25 / 1.7
t = 14.71s
c) v² = u² + 2as
s = 70m
a = 1.7m/s²
u = 0 m/s
v = ?
v² = 2as
v = √238
v = 15.43 m/s
A 4 kg mass is moving at 8 m/s collides with a 2 kg mass moving at 5 m/s.
After the collision, both objects stick together, what is the velocity of the
two cars? *
Answer:
V = 7 m/s
Explanation:
Given that,
Mass 1, m₁ = 4 kg
Speed of the object 1, v₁ = 8 m/s
Mass 2, m₂ = 2 kg
Speed of object 2, v₂ = 5 m/s
After the collision, both objects stick together. Let V be the common velocity. Using the conservation of linear momentum to find it.
[tex]m_1v_1+m_2v_2=(m_1+m_2)V\\\\V=\dfrac{m_1v_1+m_2v_2}{m_1+m_2}\\\\V=\dfrac{4(8)+2(5)}{4+2}\\\\V=7\ m/s[/tex]
So, the velocity of two cars is 7 m/s.
3) El motor de una moto le imprime una velocidad de 90 km/h al aplicar sobre ella una fuerza de 240 N. ¿Cuál es la potencia de la moto en vatios?
Answer:
P = 6000 W
Explanation:
The given question is "The motor of a motorcycle gives it a speed of 90 km / h when a force of 240 N is applied to it. What is the power of the motorcycle in watts?"
Given that,
Speed of a motorcycle, v = 90 km/h = 25 m/s
Force applied to the motorcycle, F = 240 N
We need to find the power of the motorcycle. We know that,
Power = Fv
So,
P = 240 N × 25 m/s
= 6000 W
So, the required power of the motorcycle is equal to 6000 W.
Once a player has stopped dribbling, how many steps are they allowed to take at maximum?
Answer:
2 steps
Explanation:
:)
this makes basketball interesting
Answer:
2 steps tops. If it is more that is called "traveling".
Explanation:
What is the name of the process where rocks are being broken down into small grains of sediment or soil?
A) Weathering
B) Erosion
C) Deposition
D) Uplifting
Answer:
a. weathering
Explanation:
weathering is the breakdown of rocks into sediments and soil
1. A wave on a rope has a wavelength of 2.0m And a frequency of 2.0 Hz. What is the speed of the wave?
Plzzzzzzz help!!!
Answer:
4
Explanation:
2*2
www.omnicalculator.com/physics/wavelength