Which is directly proportional PLS HURRY
Which is directly proportional to your weight on a planet's surface?
A. Only your mass
B. Only the mass of the planet
C. Your mass and the mass of the planet
D. The distance from the surface to the center of the planet

Answer:

See below

Explanation:

Sp Ht = J / kg-C  =   11 000 J / (.25 kg * 10 C) = 4,400  J/ kg °C

Answer:

Explanation:

The new volume can be found by using the formula

\(P_1V_1 = P_2V_2\)

Since we are finding the new volume

\(V_2 = \frac{P_1V_1}{P_2} \\\)

From the question we have

101.325 kPa = 101325 Pa

96 kPa = 96000 Pa

From the question we have

\(V_2 = \frac{25 \times 96000}{101325} = \frac{2400000}{101325} \\ = 23.68615840...\)

We have the final answer as

Hope this helps you

Answer:

true

Explanation:

Sound travels faster in water compared with air because water particles are packed in more densely.

Answer:

I would say metals

Ok so let's start off by saying that chemicals take a big part in our life, right? Nevertheless, many of these chemicals may, especially if not appropriately used, endanger our health and poison our environment. Some reactions may result in death and injury to people, damage to physical property, and severe effects on the environment.

Next, let's talk about metals.

Metals are often good conductors of electricity and heat, shiny and pliable. The metals we use day-to-day are converted from metallic ores to their final form. Toxic metals sometimes imitate the action of an essential element in the body, interfering with the metabolic process resulting in illness.

Last, acids.

Acids can react violently with water and are harmful in the presence of moisture in the mouth or eyes or in proximity with other aqueous solutions

I hope this helps :)

Answer:

metals i think

Explanation:

Answer:

A storm is categorized into different stages as its wind speed and air pressure change. The changes in wind speed and air pressure are used to determine the storm's intensity and classification. The most commonly used classification system for storms is the Saffir-Simpson Hurricane Wind Scale, which categorizes hurricanes based on their sustained wind speeds. Other storm classification systems may be used for different types of storms, such as tornadoes or thunderstorms. Regardless of the classification system used, the changes in wind speed and air pressure are key indicators of a storm's development and intensity.

The rocket's velocity is 0.862c relative to the observer.

In this scenario, the rocket is moving at a velocity of 0.862c to the right. The term "c" represents the speed of light, which is approximately 299,792,458 meters per second. To calculate the rocket's velocity, simply multiply 0.862 by the speed of light.

The velocity of the rocket is relative to an observer or a reference frame. This means that the rocket's speed is being measured compared to the position of an observer, which could be a person, a device, or another object. In this case, the rocket is moving at a velocity of 0.862 times the speed of light, which is a significant fraction of the speed of light and would cause relativistic effects, such as time dilation and length contraction, to become noticeable.

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Answer:

Options (3) and (6)

Explanation:

Janine drives 2.2 km East.

Since, distances measured in the East are positive,

Displacement = 2.2 km

Then she drives 4.4 km west

Displacement = -4.4 km

Followed by 1.7 km in the East

Displacement = 1.7 km

Total displacement = 2.2 - 4.4 + 1.7 = -0.5 km

\(\overrightarrow{d}=-0.5\) km

Total distance covered by Janine = 2.2 + 4.4 + 1.7 = 8.3 km

d = 8.3 km

Therefore, Options (3) and (6) will be the answer.

The force needed to accelerate a 2500 kg car at a rate of 4m/s² will be  10,000 N.Option B is correct.

Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body. Force is defined as the product of mass and acceleration. Its unit is Newton.

Given data;

Force,F = ?

Mass,m = 2500 kg

Acceleration,a = 4 m/s²

The force is found as;

F=ma

F=2500 kg × 4 m/s²

F= 10,000 N

The force needed to accelerate a 2500 kg car at a rate of 4m/s² will be  10,000 N.

Hence option B is correct.

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(a). The power of the candy bar is,

The time taken to play on 800 kJ energy of the candy bar is,

where E is the energy.

Substituting the known values,

As 1 minute is equal to 60 seconds,

Thus,

Thus, the time taken to play tennis on the 800 kJ energy is 30.3 minutes.

(b). By doing the exercise, the process of digestion of food inside our body increases. Thus, the exercise does not helps us to burn the calories. But it helps us to diggest the heavy meal like candy bar easily.

The time taken to digest the canndy bar or to utilise its energy is large because it takes a lot of time to burn small amount of food and make it digest quickly.

The final volume of the gas is 0.00474 m^3.

W = PΔV

ΔV = W/P

Substituting the values given, we get:

ΔV = 455 J / 1.25 x \(10^5\) Pa

ΔV = 0.00364 \(m^3\)

Since we are looking for the final volume of the gas, we need to add the change in volume to the initial volume:

Final volume = Initial volume + ΔV

Final volume = 1.1 x \(10^{-3\) m³ + 0.00364 m³

Final volume = 0.00474 m³

Volume refers to the amount of space that an object or substance takes up in three dimensions. It is typically measured in units such as cubic meters (m³), cubic centimeters (cm³), or cubic feet (ft³). Volume can apply to any type of object, whether it is a solid, liquid, or gas.

For solid objects, volume is calculated by multiplying the length, width, and height of the object. For liquids and gases, volume is often measured by using a graduated container or through the displacement method, where the amount of fluid displaced by an object is used to calculate its volume.

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If an object is given an initial velocity in any direction and then allowed to travel freely under gravity, it is called a projectile motion.

It is basically 3 types.

Answer:

1.63 N

Explanation:

F = GMm/r^2

  = (6.67x10^-11)(10x10^5)(3x10^5) / 3.5^2

  = 1.63 N  ( 3 sig. fig.)

When submerged in saltwater, the buoyant force will support the entire weight of the iron anchor, resulting in a fraction of 1.

To determine the fraction of the iron anchor's weight supported by the buoyant force when submerged in saltwater, we need to compare the weight of the anchor to the buoyant force acting on it.

The buoyant force can be calculated using Archimedes' principle, which states that the buoyant force is equal to the weight of the fluid displaced by the submerged object.

Given that the density of saltwater is 1025 kg/\(m^{3}\) and assuming the density of iron is higher, we know that the anchor will sink in saltwater. Therefore, the buoyant force will act in the upward direction to partially counterbalance the weight of the anchor.

The fraction of the anchor's weight supported by the buoyant force is given by:

Fraction = Buoyant force ÷ Weight of the anchor

Since the weight of the anchor is entirely supported by the buoyant force in this case, the fraction can be calculated as:

Fraction = Buoyant force ÷ Weight of the anchor = Weight of the anchor ÷ Weight of the anchor = 1

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The independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.The dependent variable, the one that you measure the response in, is the distance that the washers travel.

The independent variable in an experiment is the variable that is manipulated by the researcher. It is the variable that is intentionally changed by the researcher to examine the impact of this change on the dependent variable.The dependent variable, on the other hand, is the response that is measured by the researcher.

It is the variable that is being influenced by the independent variable in an experiment. Thus, in the given experiment, the car's hitting the barrier is the independent variable while the distance that the washers travel is the dependent variable.

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(a) The activity of the radiation source is 145 Bq. (b) The activity of the radiation source is 3.92 x 10^-3 Ci.

The activity of a radioactive source is defined as the rate of decay of radioactive atoms within it. The number of counts recorded by a radiation detector is proportional to the activity of the source. In this case, the detector recorded 8700 counts in 1 minute, so the activity of the source is 8700 counts per minute (cpm).

To convert cpm to becquerels (Bq), we use the conversion factor 1 Bq = 1 decay per second (dps), so the activity is 8700/60 = 145 Bq. To convert to curies (Ci), we use the conversion factor 1 Ci = 3.7 x 10^10 dps, so the activity is 145/3.7 x 10^10 = 3.92 x 10^-3 Ci.

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Answer:

T = 0.83 seconds

Explanation:

Given that,

The mass attached to the spring, m = 1.5 kg

The amplitude of the spring, A = 0.3 m

The spring constant of the spring, k = 85 N/m

We need to find the period of the mass's motion. The time period in spring mass system is given by :

\(T=2\pi \sqrt{\dfrac{m}{k}} \\\\T=2\pi \sqrt{\dfrac{1.5}{85}} \\\\T=0.83\ s\)

So, the period of the mass's motion is 0.83 seconds.

Answer: 490.5 N

Explanation:

In this case, the only two forces acting on the mass are the person's strength (i.e. the force in question) and the weight of the mass.

The sum of the forces is equal to 0. This means that Force (person) = Force (weight).

Fp = Fw = m * gravity

Fp = 50 kg * 9.81 m/s^2

Fp = 490.5 (kg*m/s^2)

Fp = 490.5 N

Explanation:

When water vapor in the air comes into contact with something cool, like the ceiling of a tent, its molecules slow down and get closer together. When that happens, the gaseous water vapor turns back into liquid water droplets. That's condensation!

Answer:

Magnetic domains

The average velocity of the pirates is 1.44 miles/hr.

A vector quantity is an average velocity. The change in position or displacement (x) divided by the time intervals (t) in which the displacement happens yields the average velocity. Depending on the sign of the displacement, the average velocity can be positive or negative. Meters per second (m/s or ms-1) is the SI measure of average velocity.

total time = t₁ + 1 + t₂

T = 1 + 1 + 3

T = 5hr

Displacement = AC = √(4² + 6²)

S = √16+36

S = √52

Average velocity = Displacement/ Time

v = S/t

substituting the value in the above equation, we get

v = 7.2/5

v = 1.44 mile/hr

Thus, the average velocity of the pirates is 1.44 miles/hr.

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To determine the width of the hair from measurements of its diffraction pattern, you can utilize the principles of diffraction. By observing the pattern formed by the laser beam after passing through the hair, you can measure the distance between adjacent bright or dark fringes in the diffraction pattern. This distance is known as the fringe spacing.

The fringe spacing is related to the width of the hair and the wavelength of the laser light used. The narrower the hair, the wider the fringe spacing will be. By knowing the wavelength of the laser and measuring the fringe spacing, you can calculate the width of the hair using the formula:

Hair width = (Fringe spacing * Distance to screen) / (Distance between hair and screen)

Where the distance to the screen is the distance between the hair and the screen on which the diffraction pattern is observed, and the distance between the hair and the screen is the distance between the hair and the laser beam source.

Please note that this method assumes the diffraction pattern is formed in the Fraunhofer regime and that the hair is sufficiently thin compared to the laser's wavelength.

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Answer:

Long short

Explanation:

1

Dogs that are bigger are selected to be parents.

2

The parents are bred together, and their offspring will be different sizes.

3

The biggest offspring will be selected and bred together.

4

This cycle continues until the dogs have been selectively bred to be bigger than the current world record size.

5

Selective breeders need to ensure that they are not also selecting for disadvantageous traits, like genetic limb defects.

Ur gonna need this...

Brainliest plzzz..thanks..sorry Messy

Answer:

Geological and atmospheric changes happening over a long time scale can cause short extinctions.

Explanation:

If the roadway is wet and the cars starts to skid, one should slow down by shifting to lower gear. The correct option is B.

A gear is component used to transmit motion. They are used in cars, trucks, machines, bicycles, etc.

For a car to avoid skidding on the wet roads, one must drive the car slowly. This can be done by shifting the gear to the lower one. This will help car to keep balance when brakes are applied on wet roads.

Thus, the correct option is B.

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When you shake your hand the same distance but faster, the amplitude remains the same, frequency increases, wavelength decreases, and the wave speed may or may not change depending on the properties of the rope.


- Amplitude: Since you are shaking your hand the same distance, the amplitude, which is the maximum displacement of a point on the wave from its equilibrium position, remains unchanged.
- Frequency: When you shake your hand faster, you create more oscillations in a given time period, which leads to an increased frequency (number of oscillations per unit time).
- Wavelength: As frequency increases, the wavelength (distance between two consecutive crests or troughs) decreases, according to the wave equation: speed = frequency × wavelength.
- Wave Speed: The speed of a wave on a rope is determined by the tension and mass per unit length of the rope. If these factors remain constant, the wave speed will not change. However, in a real-world scenario, these factors may be affected by the increased frequency, leading to a change in wave speed.


When shaking a rope faster but with the same distance, the amplitude remains constant, frequency increases, wavelength decreases, and the wave speed may or may not change depending on the rope's properties.

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Answer:

1120

Explanation:

power =force ×velocity

=700*1.6=1120

The prevention factors required to prevent mother-to-child transmission are:  

Mother-to-child transmission also referred to as Perinatal is described as  when HIV is transmitted from the mother to the child during pregnancy, childbirth, or breastfeeding. For ladies who are pregnant, HIV counseling and testing is the primary and most basic step in lessening mother-to-child transmission.  Prenatal Treatment , when taken all through pregnancy, conveyance, and breastfeeding, can decrease the chance of HIV transmission to a newborn child to less than 5%. Ladies who test HIV-positive amid their pre-birth visits at EGPAF-supported locales are quickly connected to long-lasting Craftsmanship and counseled on the benefits of enrollment and maintenance on treatment.  Safe childbirth is an imperative thought for all hopeful moms and especially for HIV-positive ladies. Post-natal care is eesential for both the mother and the baby especially since it includes child wellness services such as nutrition, immunization,  and growth monitoring.

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The moment of inertia of the body about an axis through O, is calculated as I r = 57/140 MR².

Moment of inertia is defined as the quantitative measure of the rotational inertia of a body.

Density of solid sphere = M/(4/3 π R³- 4/3 π(4/3)³)

= 8M / (7 * 4/3 *πR³)

Fill the cavity with mass m

m=ρ 4/3 π (R/3)³

m = M/7

When cavity is filled with mass of density ρ then, sphere is complete and its Inertia about O is ;

I0 = I cavity + I r  [ I r = I of remaining mass ]

2/5* (8M/7) * R²= Ir + [2/5 * M/7 * (R/2)² + M/7 (R/2)²]  {parallel axis theorem}

I r = 57/140 MR²

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: A hole of radius R/2 is cut from a solid sphere of radius R. If the mass of the remaining part of sphere is M, then find moment of inertia of the body about an axis through O.

The magnitude of B⃗ ×A⃗ is equal to the product of the magnitudes of vectors A⃗ and B⃗.

|B⃗ ×A⃗ | = |( |A||B|, 0, 0 )| is the direction of A⃗ ×B⃗.

|B⃗ ×A⃗ | = √(|A||B|)² + 0² + 0² is the direction of B⃗ ×A⃗.

|B⃗ ×A⃗ | = √(|A|²|B|²) is the magnitude of A⃗ ×B⃗.

|B⃗ ×A⃗ | = |A||B| is the magnitude of B⃗ ×A⃗.

To find the magnitude of B⃗ ×A⃗, we first need to determine the cross product of B⃗ and A⃗. The cross product of two vectors A⃗ and B⃗ is another vector C⃗ that is perpendicular to both A⃗ and B⃗. The direction of the cross product is determined by the right-hand rule, which states that if you curl the fingers of your right hand from A⃗ to B⃗, then your thumb will point in the direction of C⃗.

Since vector A⃗ points along the negative x-axis, its components are (-|A|, 0, 0). Similarly, vector B⃗ along the positive z-axis has components (0, 0, |B|). The cross product of these two vectors is given by:

B⃗ ×A⃗ = (0, -|B|, 0) × (-|A|, 0, 0)

Using the cross product formula, we can calculate:

B⃗ ×A⃗ = (0×0 - (-|B|)×(-|A|), 0×(-|A|) - 0×0, 0×0 - 0×(-|B|))
B⃗ ×A⃗ = (|A||B|, 0, 0)

The magnitude of this vector is simply the length of the vector, which is given by:

|B⃗ ×A⃗ | = |( |A||B|, 0, 0 )|
|B⃗ ×A⃗ | = √(|A||B|)² + 0² + 0²
|B⃗ ×A⃗ | = √(|A|²|B|²)
|B⃗ ×A⃗ | = |A||B|

Therefore, the magnitude of B⃗ ×A⃗ is equal to the product of the magnitudes of vectors A⃗ and B⃗.

|B⃗ ×A⃗ | = |( |A||B|, 0, 0 )| is the direction of A⃗ ×B⃗.

|B⃗ ×A⃗ | = √(|A||B|)² + 0² + 0² is the direction of B⃗ ×A⃗.

|B⃗ ×A⃗ | = √(|A|²|B|²) is the magnitude of A⃗ ×B⃗.

|B⃗ ×A⃗ | = |A||B| is the magnitude of B⃗ ×A⃗.

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The smooth muscle in the wall of the bladder when stretched triggers the micturition reflex (urination).

This is defined as a lined layers of muscle tissue that stretch to hold urine in organisms.

In older people the elasticity of the bladder is reduced which is why it makes it harder for them to hold urine for a long time.

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Answer:

Joules

Explanation:

The unit for Energy is Joules, which is equal to kg m²/s².

The gravitational potential energy is calculated as:

Where m is mass (kg), g is gravity (m/s²) and h is the height (m). So, the unit of the potential energy is:

Therefore, the answer is joules.