Final answer:
In the early 1800s, forensic scientists, such as chemists and medical doctors, began to provide evidence in court related to physical evidence from crime scenes. Option b
Explanation:
During the early 1800s, forensic science was a field where professionals, including medical doctors and sometimes chemists, provided scientific evidence in courts to assist legal proceedings.
These individuals would analyze physical evidence from crime scenes, such as hair, blood, and other body fluids, and increasingly, DNA. They played crucial roles in determining the facts of criminal cases by examining forensic evidence left at crime scenes.
This period marked the beginning of the systematic application of science to legal processes, a practice that would grow significantly with advancements in technology and methodology. Option b
The image shows a pendulum that is released from rest at point A. Which energy transformation is correct? From A to C, kinetic energy is transformed into gravitational potential energy. From C to D, kinetic energy is transformed into gravitational potential energy. From C to E, gravitational potential energy is transformed into kinetic energy. From D to E, gravitational potential energy is transformed into kinetic energy.
Answer:
Partially: From C to D, kinetic energy is transformed into gravitational potential energy and From D to E, gravitational potential energy is transformed into kinetic energy
Explanation:
What happens in this pendulum is that at point A, there's only gravitational potential energy (no velocity=no kinetic energy)
At point C, it has maximum speed since all of the potential energy is transformed into kinetic energy (no potential gravitational energy at this point)
At point E, it is the same as at point A. (no kinetic energy)
At the intermediate points (B and D) there are both kinetic and potential energy. At point B the kinetic energy is increasing and at point D it is decreasing.
Now let's see each case:
- From A to C, kinetic energy is transformed into gravitational potential energy: It is actually the opposite, so no.
- From C to D, kinetic energy is transformed into gravitational potential energy: Yes, but not all of it is transformed since it still has kinetic energy that allows it to get til point E.
- From C to E, gravitational potential energy is transformed into kinetic energy: No, it is the opposite.
- From D to E, gravitational potential energy is transformed into kinetic energy: Yes, but not all of it, since at point D it also has kinetic energy.
The kinetic energy is transformed into gravitational potential energy from point C to B. But complete transformation is not happening. Thus, the statement is somehow correct.
The analysis of pendulum is given as follows:
At point A, there's only gravitational potential energy and no kinetic energy, because the pendulum is at rest at A. At point C, it has maximum speed since all of the potential energy is transformed into kinetic energy. Therefore, at this point there is only kinetic energy and no potential energy. At point E, it is the same as at point A, but in opposite side. So, at this point there is no kinetic energy. At points B and D there are both kinetic and potential energy. At point B the kinetic energy is increasing and at point D it is decreasing.
Now as per the given statements:
From A to C, kinetic energy is transformed into gravitational potential energy. It is actually the opposite. Thus, the statement is incorrect. From C to D, kinetic energy is transformed into gravitational potential energy. At this interval, the kinetic energy is converting into potential energy but the conversion is not complete. Thus, the statement is somehow correct. From C to E, gravitational potential energy is transformed into kinetic energy. At this point, the kinetic energy is converting into the potential energy. Thus, the statement is incorrect. From D to E, gravitational potential energy is transformed into kinetic energy. This statement incorrect because there is conversion of kinetic energy into potential energy.Thus, we can conclude that from C to D, the kinetic energy is transformed into gravitational potential energy, but the transformation is not complete. Hence, statement (B) is correct.
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Alpha century is 4 light years from earth how long would it take for light form alpha centauri to reach earth
Given:
Distance of alpha century = 4 light year
Speed of light = 3 × [tex] 10^{8} [/tex] m
To find:
Time taken by light to reach earth = ?
Formula used:
Distance = speed × time
Solution:
Distance = 4 light year
Converting distance from light year into meter
1 light year = 365 × 24 × 60 × 60
4 light year = 4 × 365 × 24 × 60 × 60× 3 ×[tex] 10^{8} [/tex]
As we know,
Distance = speed × time
s = v × t
Where s = distance
v = velocity
t = time
So,t = [tex] \frac{s}{v} [/tex]
t = [tex] \frac{4 × 365 × 24 × 60 × 60× 3 ×[tex] 10^{8} [/tex]}{3 ×[tex] 10^{8}} [/tex]
t = 4 × 365 × 24 × 60 × 60 second
t = 4 year
Thus, Time taken by light to reach earth from alpha century is 4 earth year.
Tp-15 water current has the greatest effect on which type of boat?
Answer: Displacement sailboat
Displacement sailboat are stable even in strong water current for it was designed to glide through the water smoothly with a minimum of power for they have smooth lines and curves that gently move water out of its way. In displacement boat, the water moves gradually where less resistance against the boat is created and the boat ride is smooth and safer.
For the electric field shown, which of the following statements describes an increase in voltage?
A) A negative charge crosses an equipotential line toward the source charge.
B) You cannot tell from the information given.
C) A positive charge crosses an equipotential line toward the source charge.
D) A positive charge moves along an equipotential line.
UPDATE: ANSWER IS C
Answer:
C
Explanation:
Just took test
Which describes constant acceleration in one direction? a baseball moving in a curved path over a fence a basketball at rest a skydiver in free fall a car increasing its speed while moving around a curve
Final answer:
A skydiver in free fall describes constant acceleration in one direction since gravity provides a constant acceleration downwards near Earth's surface.
Explanation:
The question asks which scenario describes constant acceleration in one direction. The correct answer is a skydiver in free fall. This is because, near the surface of the Earth, an object in free fall experiences a constant acceleration due to gravity, with a magnitude of approximately 9.8 m/s².
The direction of this acceleration is vertically downwards, and it remains constant in both magnitude and direction in the absence of air resistance.
In contrast, a car rounding a bend, a merry-go-round increasing speed, or a pendulum swinging all experience changing directions or types of motion which do not represent constant acceleration in one direction.
From an ethical standpoint, which best describes why new biotechnology products should be tested extensively before they are allowed to be used?
(2 points)
There can be unintended consequences to many new biotechnology products.
Many new products end up being more expensive than they appear to be.
Biotechnology products tend to stop working after a few years.
There are usually no benefits to the products of biotechnology.
Its actually A. I did the same question and A was the correct answer.
There can be unintended consequences to many new biotechnology products so they should be tested extensively before allowed to be used. Option A is correct.
Biotechnology:
It is a field of science that use principles of technology and biology to improve the human lives.
For example-
Vaccines are produced by using the principles of biotechnology.Immunotherapy drugs are also produced by the biotech companies.The effect of biotechnology products in a long term manner cannot be predicted.Therefore, there can be unintended consequences to many new biotechnology products so they should be tested extensively before allowed to be used.
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The type of mass movement where rock fragments become airborne is:
At its nucleus, the milky way galaxy is about 100,000 light-years wide and _____.
At it's nucleus,the milky-way galaxy is about 100,000 light-years wide and 10,000 light-years thick
hope this helps
According to charles' law, the volume of a fixed amount of gas is directly proportional to
According to Charles's law, the volume of a fixed amount of gas is directly proportional to its Kelvin temperature, assuming constant pressure. It means that volume of the gas increases with increase in temperature and decreases with decrease in temperature.
Explanation:According to Charles's law, the volume of a fixed amount of gas is directly proportional to its Kelvin temperature when the pressure is held constant. This law was named after the French scientist Jacques Alexandre César Charles, a pioneer in balloon flight. It essentially means that when the temperature of gas increases under constant pressure, the volume of the gas also increases and vice versa.
For instance, if you raise the gas temperature from 283 K to 303 K at a constant pressure, you will see an increase in its volume from 0.300 L to 0.321 L, corroborating Charles's law.
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Magnetic fields are produced by: atoms currents voltages charges
Answer:
curtent
Explanation:
The answer and how to do it
While some aspects are based on ____, body composition is largely a result of ____,
A. BMI;BMR
B. Diet;Excercise
C. Heredity;Lifestyle
D. Lifestyle;Heredity
Answer : Option C) Heredity; Lifestyle.
Explanation : While some aspects are based on heredity, body composition is largely a result of Lifestyle.
Even though it is believed that 80 percent of the aspects of a human body is heredity, but an individual body composition is largely influenced by the result of the lifestyle an individual lives.
Which one of the following equations encompasses Boyle's Law, Charles's Law, and the relationship between pressure and temperature when the volume is constant?
A. P = F/A
B. P1V1 = P2V2
C. V1/T1 = V2/T2
D. PV = nRT
A car turns a corner that has a radius of 5 m and experiences a centripetal acceleration of 20 m/s². If the radius of turn were increased to 10 m, calculate the centripetal acceleration.
Answer:
10
Explanation:
When applying a horizontal force of 30N, an object of mass 6 kg accelerates at 4m/s2. The force of friction on the surface must be ___ N
what is the difference between series and parallel circuits and examples of when you would use them ?
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.20×106 N , one at an angle 12.0 ∘ west of north, and the other at an angle 12.0 ∘ east of north, as they pull the tanker a distance 0.700 km toward the north.
A bus moves with 500000joules the driver applies brakes how much work is needed for the bus to stop
If element "X" is heavier than element "Y" then...
Question 4 options:
A.) Element "X" must be a metal.
B.) Then Element "X" must be on the right side of the periodic table.
C.) Element "X" must have more particles in the nucleus than Element "Y."
D.) Element "X" must have a higher melting point than Element "Y."
At an ocean depth of 10.0 m, a diver’s lung capacity is 2.40 l. the air temperature is 32.0°c and the pressure is 101.30 kpa. what is the volume of the diver’s lungs at the same depth, at a temperature of 21.0°c and a pressure of 141.20 kpa?
Answer:
V = 1.66 L
Explanation:
As we know that at the depth of 10 m the volume of the lungs of diver is given as
V = 2.40 L
Temperature = 32 degree C
Pressure = 101.30 kPa
Now we have change the values of pressure and temperature
Pressure = 141.20 kPa
Temperature = 21 degree C
Now we can use idea gas equation to solve this
[tex]PV = nRT[/tex]
[tex]\frac{P_1V_1}{RT_1} = \frac{P_2V_2}{RT_2}[/tex]
so we have
[tex]\frac{101.30 \times 2.40}{R(273 + 32)} = \frac{141.20 \times V}{R(273 + 21)}[/tex]
[tex]V = 1.66 L[/tex]
A voltage source in a circuit provides electrical _________.
two charges separated a distance of 1.0 meter exert a 1.0-N force on each other If the charges are pushed to a separation of 1/4 meter the force of each charge would be?
Final answer:
The electrostatic force between two charges increases by a factor of 16 when the distance between them is reduced to a quarter of the original distance, resulting in a new force of 16 N.
Explanation:
The question provided deals with the concept of electric force between point charges, which is described by Coulomb's Law. According to this law, the force F between two point charges is directly proportional to the product of the charges q₁ and q₂, and inversely proportional to the square of the distance r between them. Specifically, F = k * (q₁ * q₂) / r², where k is Coulomb's constant.
In the original scenario, two charges exert a 1.0-N force when separated by a distance of 1.0 meters. When the separation is reduced to 1/4 meter (or 0.25 meters), the distance squared term in Coulomb's Law (r²) becomes (0.25)², which is 1/16 of the original distance squared. Since the force is inversely proportional to the square of the distance, decreasing the distance by a factor of 4 (which squares to be a factor of 16) increases the force by that same factor of 16.
Thus, the new force would be 1.0 N multiplied by 16, resulting in a force of 16 N when the charges are 1/4 meter apart.
How does a gas do work?
A. By changing volume
B. By creating energy
C. By conserving energy
D. By flowing
A gas does work by changing its volume, adhering to the law of conservation of energy and resulting in increases in energy, pressure, and/or temperature.
A gas can do work by changing its volume. When a gas in a cylinder expands, it exerts a force on the piston and moves it, doing work. According to the Ideal Gas Law, work done by a gas results in an increase in its energy, which can manifest as an increased internal kinetic energy due to the motion of its atoms and molecules. This concept adheres to the law of conservation of energy, meaning that energy within a closed system is neither created nor destroyed, but can change forms. An example of work being done by a gas is when you inflate a bicycle tire; the air pressure and temperature increase inside the tire due to the work done by the pump.
Thus, the correct answer to how a gas does work is A. By changing volume.
A 72 kg sled Is pulled forward from rest by a snowmobile and accelerates at 2 m/s squared forward for five seconds. The force of friction acting on the sled is 120 N backwards. The total mass of the snowmobile and driver is 450 kg. The drag force acting on the snowmobile is 540 N backwards. What is the tension in the rope.
Final answer:
The tension in the rope is 516 N.
Explanation:
To find the tension in the rope, we need to calculate the net force acting on the sled. The net force is equal to the mass of the sled multiplied by its acceleration. Given that the sled has a mass of 72 kg and accelerates at 2 m/s² for 5 seconds, we can use the equation:
Net force = mass x acceleration
Net force = 72 kg x 2 m/s² = 144 N
However, there are two forces acting in the opposite direction - the force of friction (120 N backwards) and the drag force (540 N backwards). So, the net force is:
Net force = 144 N - 120 N - 540 N = -516 N
The negative sign indicates that the net force is acting in the opposite direction of motion. Therefore, the tension in the rope is equal in magnitude and opposite in direction to the net force, so the tension in the rope is 516 N.
Which of the following would decrease the magnetic field around a wire?
A. decreasing the current
B. reversing the poles of the wire
C. looping a section of the wire into a solenoid
D. increasing the current
What type of collision is it if it bouunces of of each oyher?
What is the magnitude of the instantaneous velocity at 4.00 s?
The required magnitude of the instantaneous velocity at t = 4.00 s is 2 m/s.
What is velocity?Velocity is defined as the rate of change in the position of an object with respect to time.
The displacement function of an object s(t) gives the position of the object at time t. To find the instantaneous velocity at a particular time t, we need to find the derivative of the displacement function with respect to time.
In this case, the displacement function is s(t) = 2t + 4. Taking the derivative with respect to time, we get,
v(t) = ds/dt = 2
This means that the instantaneous velocity of the object is constant and equal to 2 m/s at all times. Therefore, the magnitude of the instantaneous velocity at t = 4.00 s is 2 m/s.
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Complete question-
What is the measure of the magnitude of the instantaneous velocity at 4.00 s where displacement is a function of t, s = 2t + 4?
A cran uses an average force of 5200N to lift a steel beam 25m. How much work does the crane do on the steal beam.
Please help or explain how to do this anyone. Please and thank youu
Where must an object be placed to form an image 30.0 cm from a diverging lens with a focal length of 43.0 cm?
The change in electric potential energy per unit charge is
A) amperes
B) current.
C) gravity.
D) voltage.
correct. D) Voltage is the change in electric potential energy per unit charge. It is sometimes called the electric potential difference
Voltage is called as the change in electric potential energy per unit charge which is called as the electric potential difference. So, the correct option is D.
What is Voltage?Voltage is also called electric pressure, electric tension or potential difference which is defined as the difference in electric potential between two points. This corresponds to the work required per unit charge to move a test charge between two points in a static electric field.
Voltage is called as the change in electric potential energy per unit charge which is called as the electric potential difference. The SI unit for voltage is Volt which is represented by the letter v which derived SI unit of the electromotive force or electric potential.
Therefore, the correct option is D.
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Your question is incomplete, most probably the complete question is:
The change in electric potential energy per unit charge is
A) amperes
B) current.
C) gravity.
D) voltage