PLEASE HELP!


What information might you be able to find from the gun and bullets found at the crime scene?

You could easily help yourSELF if you simply follow the instructions in the question and "Use Ohm's law" to calculate the resistance.

Ohm's Law:  Resistance = (voltage) / (current)

Resistance = (10 v) / (5 A)

Resistance = 2 ohms

Hang time = 3.0 s

Range  = 65.06 m

Maximum Height = 11.05 m

Hang time is given by the formula;

T = 2vₒsinθ/g

Thus;

T = 2*(26.2 )sin34.2 / 9.81

    = 3.0 s  

Range is given by the formula;

R = vₒ²sin2θ/g

      = 26.2²sin(2*34.2) /9.81

      = 65.06 m  

Max height is given by the formula;

H = vₒ²sin²θ/2g

Thus;

H= 26.2²sin²34.2 /(2*9.81)

  = 11.05 m

The acceleration of the 20-kg rock is, also, a. Hope this helps.

The acceleration of the 20-kg rock will be the same as the 10-kg rock in an ideal condition. This is due to Galileo's principle of equivalence which states that the gravity does not depend on the mass of the falling object.

In Physics, the rule referred to as Galileo's principle of equivalence states that in the vicinity of Earth the acceleration of a falling object is independent of its mass. This means that all objects fall at the same rate given that they are in a vacuum where no factors like air resistance are present.

So, if a 10-kg rock falls with an acceleration a, then the 20-kg rock, when dropped from the same height, will also fall with the same_ acceleration__. The gravity does not depend on the mass of the falling object. So if by 'a' we mean the acceleration due to gravity, then both rocks fall with the same acceleration 'a' irrespective of their weights. The only difference in real-world scenarios is due to elements such as air resistance.

https://brainly.com/question/33290994

#SPJ2

B. 2HCl + Mg(OH)2 → 2H2O + MgCl2

Ohm's law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to the resistance (R). Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change.

Changes in voltage and resistance directly impact electrical current due to Ohm's Law. Increasing voltage increases current if resistance is kept constant. Conversely, increasing resistance decreases current if voltage is kept constant.

The effect of changing voltage and resistance on electric current can be explained using Ohm's Law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them. This can be expressed by the formula I = V/R, where I is the current, V is the voltage, and R is the resistance.

When voltage increases, the current will also increase if the resistance is kept constant. Similarly, increasing resistance will decrease the current if the voltage is kept constant. For example, when the voltage is doubled to a 25-W bulb, its power nearly quadruples to about 100 W, burning it out. If the bulb's resistance remained constant, its power would be exactly 100 W, but at the higher temperature its resistance is higher, too.

Therefore, voltage and resistance are intricately linked to the electric current in a circuit. It's always critical in electrical circuits to have a proper balance of voltage, resistance, and current to prevent any malfunctions or damage to electrical components.

https://brainly.com/question/36009177

#SPJ3

The speed of sound in air is directly proportional to the temperature of the air. This is because increasing the temperature reduces the air's compressibility, making it easier for sound to travel through.

The true statement is B. The speed of sound in air is directly proportional to the temperature of the air.

The speed of sound in any medium is determined by a mixture of the medium's density and rigidity, which, in the case of gases like air, is translated as compressibility. In other words, the speed of sound is higher in more rigid (or less compressible) mediums. Air is easily compressible, so the speed of sound is relatively low in it.

However, temperature impacts this as well. As the temperature rises, the particles in the air move more quickly, and so the density of the air decreases - the gas becomes less compressible. With increased temperature, sound finds it easier to travel through the medium, and so the speed of sound increases. Thus, the speed of sound in air is directly proportional to the temperature of the air because an increase in one corresponds to an increase in the other. For example, sound travels at 331 m/s in the air at 0 °C, but the speed increases to 346 m/s once the temperature hits room level (around 20 °C).

https://brainly.com/question/35989321

#SPJ12

50 mph

100 divided by 2

Answer: 1) Ectothermic animals need the warmth before they can move around to hunt food.

2) frogs, lizards, snakes

3) rattle snake

4) mammals; warm-blooded

5) Ectothermic animals have a lower body temperature than endothermic animals.

6) move around faster to raise its body temperature.

7) keep their bodies from having too much water.

8) constantly move around to keep their bodies warm.

9) ectotherm

10) Homeothermy is the ability of an organism to maintain a constant internal body temperature, regardless of the temperature of the environment. This may require the ability to lose excess heat as well as the ability to generate and conserve heat. Most mammals have both abilities.

Explanation: I never ask, but can you pls give me brainlest?

The correct answer is option D) Ectothermic animals need warmth before they can move around to hunt food. The correct answer is option C) frogs, lizards, and snakes. The correct answer is option C) rattlesnake. The correct answer is option C) mammals; cold-blooded. The correct answer is option D) Ectothermic animals have a body temperature that is the same as their environment, and endothermic animals have a constant body temperature. The correct answer is option A) slow down as a response to the cooling temperature. The correct answer is option D) generates heat loss through evaporation. The correct answer is option A) eat more often to have energy to keep a constant temperature. The correct answer is option B) endotherm. The correct answer is option B) endothermic.

The student asked why lizards bask in the sun, which group of animals could be correctly classified as ectothermic, and multiple other questions regarding endothermic and ectothermic animals. Here are the detailed answers:

1. Ectothermic species, such as lizards, need warmth to move and digest. They rely on external sources of heat, such as sun exposure, to control their body temperature, which is essential for their physiological activities.

2. Ectothermic creatures, such as frogs, lizards, and snakes, rely on external heat sources to control their body temperature, whereas endothermic animals, such as robins, squirrels, mice, bears, and wolves, do so internally.

3. Rattlesnake matches Group B reptile requirements, such as hard shells and terrestrial existence, and can be classed as terrestrial or aquatic depending on standard biological classification.

4. Birds and mammals are warm-blooded, meaning they have a constant internal body temperature that does not alter with the environment, known as endothermy, which allows them to remain active in a variety of environments.

5. Ectothermic and endothermic animals have different body temperatures. Ectothermic animals maintain a steady body temperature by relying on external heat sources, whereas endothermic species regulate their internal temperature, resulting in a constant body temperature.

6. As the temperature drops, a cold-blooded animal is likely to slow down in reaction to the decreasing temperature. Cold-blooded species, or ectotherms, rely on external heat sources to control their body temperature, therefore metabolic activities slow down in colder temperatures.

7. Sweating is one way that warm-blooded animals generate heat loss through evaporation. Warm-blooded animals lose heat by evaporation, which allows moisture on their skin to evaporate, lowering and regulating the body temperature, especially in warm surroundings or during physical effort.

8. Because endothermic animals must maintain a constant body temperature, they must eat more often to have energy to keep a constant temperature. Endotherms need a high metabolic rate to maintain their internal heat generation. Regular feeding supplies the energy required to maintain a consistent body temperature, particularly in cooler regions.

9. The characteristics of Group A describe endotherms. Endotherms are organisms that can maintain a steady internal body temperature regardless of their external environment. They regulate their temperature, allowing them to flourish in a wide range of environmental conditions, as opposed to ectotherms, which rely on external heat sources.

10. The ability of some animals to modulate their body temperatures through internal techniques such as muscle shaking, fat burning, and panting is called endothermic. Endothermic species regulate their body temperature internally via metabolic processes, allowing them to maintain a steady temperature despite environmental disturbances.

In physics, acceleration is defined as the rate of change of the velocity of an object with respect to time. That is A = VF - VI /T;

Where A =  Acceleration

VF = Final velocity = 20 km

VI = Initial velocity = 80 km

T= Time = 0.5 hr

A = (20 - 80)/ 0.5 = - 60/.5

A = - 120 Km/ hr^2

Therefore, the acceleration of the car is -120 km/hr^2.

Because the value is negative, the appropriate name that describe it is deceleration.

Plasma is known as the 4th state of matter and is itself ionized gas. In this sense, ionization consists of the production of ions, which are electrically charged atoms or molecules due to the excess or lack of electrons with respect to a neutral atom or molecule.

That is why in this process there are always free electrons. Therefore in heating gas to create plasma can yield  free electrons, and the correct option is D.

Answer:

D) free electrons.      

Explanation:

Plasma is the fourth state of matter where in matter exists in ionized form. When a gas is heated such that electrons separate from the atom and positive ion is formed along free electrons, a plasma is said to be created. Example: Sun is a ball of plasma. Thus, heating a a gas to create plasma can yield free electrons. Option D is correct.

Answer:

The charge that will pass through the wire will be approx. 0.003C.

Explanation:

Two equations are relevant to answer this question:

(1) The charge (Q) over a capacitance (C), given a voltage (U):

[tex]Q = C\cdot U[/tex]

and

(2) the capacitance of a parallel-plate capacitor:

[tex]C=\varepsilon \frac{A}{d}[/tex]

with [tex]\varepsilon[/tex] being the dielectric constant, A the plate area and d their distance.

We are given the capacitance when air is present (80 micro-Farad, or uF). The dielectric constant for air/vacuum is 8.84 pico-Farad per meter. Then someone sneaky slides a slab of dielectric medium with dielectric constant of 20 pF/m and connects a source of 30V. By inserting the slab, they increased the capacitance by a factor of 20/8.84=2.26, making it 2.26*80=181uF. By connecting it to the source 30V, they charged our capacitor to a charge

[tex]Q = C\cdot V = 181\cdot 10^{-6}F\cdot 30V=5.43\cdot 10^{-3}C[/tex]

but, the sneaky person changes his mind and removes the slab, effectively changing C down to the original 80uF. There is now excess charge on the capacitor that wants to leave! The steady-state charge on the air-filled capacitor should be:

[tex]Q_0 = C_0\cdot V = 80\cdot 10^{-6}F\cdot 30V=2.4\cdot 10^{-3}C[/tex]

The charge that will pass through the wire will be the difference:

[tex]Q-Q_0=(5.43-2.40)\cdot 10^{-3}C\approx 3\cdot 10^{-3}C[/tex]

They both transfer energy through a medium in form of waves.

Transverse waves have perpendicular disturbances relative to the wave's direction, while longitudinal waves have parallel disturbances. Examples include strings of musical instruments and light for transverse, and sound for longitudinal waves. Amplitude is independent of wave speed in both types.

Transverse and longitudinal waves both involve the transmission of energy through a medium by means of periodic disturbances. A transverse wave is characterized by the disturbance being perpendicular to the direction of wave propagation. This means that if the wave moves horizontally, the disturbance moves vertically. Examples of transverse waves include waves on strings of musical instruments and electromagnetic waves like visible light.

In contrast, a longitudinal wave, also known as a compressional wave or compression wave, has disturbances that move parallel to the direction of the wave propagation. Sound waves in air and fluids exemplify longitudinal waves, where the periodic disturbances are variations in pressure.

The amplitude of a wave, which is the size of the disturbance, does not affect the wave's speed of propagation. Whether a wave is transverse or longitudinal, its amplitude is completely independent of its speed (Vw or Uw). Additionally, there are waves that combine both transverse and longitudinal characteristics, such as seismic waves resulting from earthquakes.

A. Horizontal component: 7.3 m/s

Explanation:

The horizontal component of the velocity is given by:

[tex]v_x = v_0 cos \theta[/tex]

where

[tex]v_0 = 16 m/s[/tex] is the magnitude of the initial velocity

[tex]\theta=63^{\circ}[/tex] is the angle of the initial velocity with respect to the ground

Substituting numbers into the equation, we find

[tex]v_x = (16 m/s) cos 63^{\circ}=7.3 m/s[/tex]

B. Vertical component: 14.3 m/s

Explanation:

The vertical component of the velocity is given by:

[tex]v_y = v_0 sin \theta[/tex]

where

[tex]v_0 = 16 m/s[/tex] is the magnitude of the initial velocity

[tex]\theta=63^{\circ}[/tex] is the angle of the initial velocity with respect to the ground

Substituting numbers into the equation, we find

[tex]v_y = (16 m/s) sin 63^{\circ}=14.3 m/s[/tex]

Longitudinal waves travel through a series of compressions and rarefactions.

Longitudinal waves travel through a series of compressions and rarefactions, with sound waves in air and water as common examples. The motion of disturbance is in the same directoin as the wave propagates. The speed of these waves depends on the physical properties of the medium they are travelling through.

Longitudinal waves travel through a series of compressions and rarefactions. This is unlike transverse waves which have their disturbances occurring perpendicular to the direction of wave propagation. In a longitudinal wave, the disturbance or vibration is in the same direction as the wave travel. Examples of this type of wave include sound waves in air and water, seismic P-waves, and any waves where periodic variations in pressure are transmitted in fluids. The speed of these waves can depend on aspects such as the density and bulk modulus of the medium they're travelling through.

https://brainly.com/question/31377484

#SPJ3

Answer:

w = 73 N

Explanation:

Since the box is held by the ropes it means that the resulting tension is equal to the weight of the box

T_res = w

Now, the resulting tension is a combination of the tension of each rope.

Since we want to find the vertical component we must multiply by the cosine of 30 degrees the value of T

T_res =  T*cos(30) + T*cos(30)

T_res = 2*(42 N)*(0.866)

T_res = 72.746 N

T_res = w = 72.746 N

Answer : Deposition takes place when the molecules settle out of a solution.

Explanation :

Deposition : It is a type of process in which the phase changes from gaseous state to solid state without passing through the liquid state at constant temperature.

Or we can say that in deposition process, the molecules are settle down at the bottom of the container. In this process, there is no intermolecular space present between the atoms of molecule.

Answer:

uthe th

Explanation:

The answer to this is A, Magnetic Field.

Final answer:

The correct answer is A.) Magnetic Field. An electric current creates a magnetic field, and this phenomenon is fundamental to electromagnetism. The magnetic field around a current-carrying wire can be visualized using the right-hand rule.

Explanation:

As an electric current forms an electric field, a magnetic field is created in the phenomenon of electromagnetism. Moving electric charges form an electric current and this current is the source of all magnetic fields, whether macroscopic and flowing through a wire, or microscopic and flowing in orbit around an atomic nucleus.

The creation of a magnetic field can be observed around wires carrying electrical currents, as currents are streams of charged particles moving. The magnetic field at a point in space due to an electric current flowing through a long, straight wire can be determined by the right-hand rule, which helps visualize the relationship between current and magnetic field direction around the wire.

Therefore, the correct answer is A.) Magnetic Field.

D: use of linear perspective

The renaissance technique  used in this painting to make it more realistic and three-dimensional was use of linear perspective. Hence, option D is correct.

Creating the appearance of depth on a flat surface through the use of linear perspective. In a painting or drawing that employs this approach, all orthogonal parallel lines meet at a single vanishing point on the horizon.

It is believed that Italian Renaissance builder Filippo Brunelleschi developed linear perspective in 1415, and writer and architect Leon Battista Alberti later recorded it around 1435. They used the concept to create 3D paintings.

Although painters and architects in the ancient Greek and Roman eras were probably aware of linear perspective, there are no records from those times, and the technique was thus forgotten until the 15th century. Hence, option D is correct.

Find more on liner perspective in paintings:

https://brainly.com/question/27810443

#SPJ6

The options of your question includes:

use of negative space

B.

use of colorful paint colors

C.

use of gesture drawing

D.

use of linear perspective

NaOH is the chemical formula which represents the lye correctly.

Answer: Option D

Explanation:

Lye is termed for molecules made up of metal hydroxide family. As the compound is a metal hydroxide, it should be a base and an alkali according to the properties of metal and OH group. Mostly lye is obtained by leaching ashes or derived from strong alkali metal hydroxides.

So among the given choices, NaOH is the correct option as it is the chemical formula for sodium hydroxide. It is well known that sodium hydroxide is one of the efficient base metal in the alkali group and they can be also termed as caustic soda. Thus NaOH is the chemical formula which represents the lye correctly.

Answer:

12,558 J

Explanation:

The amount of heat absorbed by the water is given by:

[tex]Q=mC_S \Delta T[/tex]

where

m = 50 g is the mass of the water

[tex]C_s = 4.186 J/gC[/tex] is the water specific heat

[tex]\Delta T=90C-30C=60^{\circ}C[/tex] is the temperature increase of the water

Substituting into the formula, we find

[tex]Q=(50.0 g)(4.186 J/gC)(60^{\circ}C)=12,558 J[/tex]

To find the amount of heat absorbed by the water, we use the formula for heat calculation q = m × c × ΔT. With a known heat capacity of water mass and temperature change we find the heat absorbed is 12552 J.

To calculate the quantity of heat absorbed by the water, we use the formula for heat (q) which is q = m × c × ΔT . In this equation, 'm' stands for mass, 'c' represents the specific heat capacity, and 'ΔT' is the change in temperature.

 The specific heat capacity (c) of water is 4.184 J/g °C, the change in temperature (ΔT) is 90°C - 30°C = 60°C, and the mass (m) of water is 50g. Substituting these values into our formula:

 q = 50g × 4.184 J/g °C × 60°C

q = 12552 J

This value represents the heat absorbed by the water.

https://brainly.com/question/30320641

#SPJ3

Answer:

Gravitational force and magnetic force. The other forces on the list require contact (tension requires contact with the rope and friction requires the object to be in contact with the surface)

Explanation:

Answer:

gravitational force between the earth and an object and magnetic force between two magnets

Explanation:

gravitational force between the earth and an object and magnetic force between two magnets are forces that does not require contact between objects in order to exert a push or pull.

The earth and the object are never in contact with each other but there is a force of gravitation existing between them. There is force of attraction between the masses of the earth and the masses according to gravitational law are separated by a distance.

Force between two magnets may or maynot exert push or pull. They only attract when the poles of the magnets are unlike poles (different). There is force of repulsion between them if like poles of the magnet come together according to the law of magnetism. Magnets in magnetic field will always experience force even if at a distance from each other in the field hence the reason for the selected options

Answer:

It means that when water has the thermal capacity equal to iron, that thermal capacity is greater than that of copper.

Explanation:

The water equivalence of a body is the body of water that has the same thermal capacity as the body, that is, it is the body of water that, receiving the same amount of heat, undergoes the same temperature variation as the body. Thus, we can say that water equivalent to iron is greater than copper means that when water has the same thermal capacity as iron, that thermal capacity is greater than that of copper.

A device consisting of a wheel over which rope or chain is pulled in order to lift a heavy object.

Examples- Elevators use multiple pulleys in order to function. A cargo lift system that allows for items to be hoisted to higher floors is a pulley system

Formulate conclusions.  

When the distance between the source and the observer is DEcreasing, the observer sees light that has a shorter wavelength than the light actually had when it left the source.

It doesn't matter how the distance between them is decreasing.  The source could be moving toward the observer, the observer could be moving toward the source, or they could both be moving in a way that makes the separation between them decrease as time goes on.  The result is the same.

(When this is used in Astronomy and Astrophysics, the big trick is:  How does the observer know what the wavelength actually WAS when the light left the source ?)

The answer is C.Magnetic Field.

ribosomes

an animal cell with a nucleus

animal

Answer:

4) Chloroplasts, 5) An animal cell with a nucleus, 6) many-celled organisms.

Explanation:

4) Chloroplasts are organelles present in eukariotic cells that produce food with the help of sunlight via photosynthesis.

5) Every cell has a nucleus. Bacteriae are prokariotic cells, while vegetal and animal cells are eukariotic cells, in which cytoplasm is exclusive for organells. Hence, the right answer is: An animal cell with a nucleus.

6) Specialized cells are cells that help in functioning of many-celled organisms. Therefore, the right choice is: many-celled organisms.