Hillary is walking to school at 1.3 m/s. She looks at her watch and realizes she is going to be late. She starts to hurry by increasing her rate by 0.090 m/s squared. What is Hillary's speed after 10 seconds?

Answer:

Option D is quantities described by both magnitude and direction is the correct answer.

Explanation:

A scalar is quantity with magnitude only. It does not have direction. Examples of scalar are distance, speed, time etc.

A vector is quantity with both magnitude and direction. Some examples for vectors are displacement, velocity, acceleration, force, moment, electric field, magnetic field etc.

Here option A, quantities described by both force and gravity is not correct.

Option B is quantities described by both speed and movement is also not correct.

Option C is quantities described by both velocity and acceleration is also not correct.

Option D is quantities described by both magnitude and direction is the correct answer.

I’m pretty positive that it’s A. Conduction. Just refer to the definition of it.

Answer:

A device is a burner from an electric stove. Then the conduction heat is transferred to a pot.

Conduction heat is a method of heat transfer in which the the transfer is takes place by direct contact between objects. From the question , it is clear that, the burner from electric stove transfers energy to a bottom of the pot sitting on it.

C.  

carbon and hydrogen are elements and methane is a compound.

Answer:

C. carbon and hydrogen are elements and methane is a compound.

Explanation:

Elements are substances which have one type of atoms. Compounds are substances which have different types of atoms. Since, Carbon and Methane have only one type of atoms and thus, these are pure substances. Methane  contains atoms of Carbon and Hydrogen chemically combined together. Thus, methane is a compound.

The Sun is a star around which our planet Earth and other planets and satellites of our solar system revolve along specific orbits. Sun appears to be spherical in shape and consists of glowing hot gases. It contains mostly hydrogen and helium gases. The temperature of the gas mixture is extremely high.

Therefore, the Sun mostly composed of hydrogen and helium gases.

(Answer) B. Composition mostly hydrogen and helium gas, Mass 1.989 x 10^30 Kg

when heat energy is added to a system, change in system can be:

Speed of the cannon is 95 m/s

now we will find its two components

speed in horizontal direction is

[tex]v_x = 95 cos15[/tex]

[tex]v_x = 91.76 m/s[/tex]

speed in vertical direction is

[tex]v_y = 95 sin(-15)[/tex]

[tex]v_y = -24.6 m/s[/tex]

now the time taken by the cannon to reach the water surface will be find out by using kinematics

[tex]\Delta y = v_y * t + \frac{1}{2} at^2[/tex]

[tex]-3 = -24.6 * t - \frac{1}{2}9.8 * t^2[/tex]

[tex]4.9t^2 + 24.6 t - 3 = 0[/tex]

By solving above quadratic equation

[tex]t = 0.12 s[/tex]

now in the same time the horizontal distance moved by the cannon

[tex]d_x = v_x * t[/tex]

[tex]d_x = 91.76 * 0.12[/tex]

[tex]d_x = 10.93 m[/tex]

Since the distance of crewmen is 20 m so it will definitely safe as cannon will hit at distance 10.93 m

First method

initial distance = 16m

final distance= 43 m

total distance covered= final -initial

                                     =43m -16m

                                     =27m

Second method

Si= 16m

Sf =43 m

t= 12 s

first we will find V

V =  (Sf-Si)/ t

V =( 43- 16)/ 12

V = 27/12  ⇒ V= 9/4

V= distance / time

distance= V×time

distance = (9/4) ×12

distance =27

Final answer:

To determine the total distance traveled by Chuck Wagon during 12 minutes of motion, multiply the velocity by the time.

Explanation:

To determine the total distance traveled by Chuck Wagon during 12 minutes of motion, we can use the formula:

Distance = Velocity * Time

Given that the velocity of Chuck Wagon is 0.5 mile/minute and the time is 12 minutes, we can substitute these values into the formula:

Distance = 0.5 mile/minute * 12 minutes = 6 miles

Therefore, Chuck Wagon traveled a total distance of 6 miles during 12 minutes of motion.

Answer:

The acceleration of the rabbit is 2[tex]\frac{m}{s^{2}}[/tex].

Explanation:

A rabbit starts from a resting position and moves at 6 m/s after 3 seconds.

Applying first equation of motion we get,

v = u + a t

v = final velocity = 6 m/s

u = initial velocity = 0 m/s

t = time = 3 s

a = acceleration

6 = 0 + a (3)

a = 2[tex]\frac{m}{s^{2}}[/tex]

The acceleration of the rabbit is 2[tex]\frac{m}{s^{2}}[/tex].

Answer:

Applying first equation of motion we get,

v = u + a t

v = final velocity = 6 m/s

u = initial velocity = 0 m/s

t = time = 3 s

a = acceleration

6 = 0 + a (3)

a = 2

The acceleration of the rabbit is 2.

Explanation:

Apply the first equation of motion

Final answer:

Projectile motion is created by the combination of horizontal motion at constant velocity and vertical motion with constant acceleration due to gravity, resulting in a curved trajectory.

Explanation:

The two kinds of motion that combine to produce projectile motion are horizontal motion and vertical motion. The horizontal motion of a projectile happens at a constant velocity, due to the absence of horizontal forces acting on the projectile (ignoring air resistance). On the other hand, the vertical motion occurs with constant acceleration due to gravity acting on the projectile. When these two motions—horizontal and vertical—combine, they form the characteristic curved trajectory of a projectile motion.

For example, when a football is kicked, it travels horizontally forward while also being pulled down by gravity. The resulting path is a parabola. This is a classical example of projectile motion where the horizontal motion, which is constant, and the vertical motion, which is accelerated by gravity, work simultaneously to guide the motion of the projectile.

force of friction on the cart is given as

[tex]F_f = 280 N[/tex]

here we also know the reaction force due to surface

[tex]R = 766 N[/tex]

so we can say reaction force is given as

[tex]R = \sqrt{F_n^2 + F_f^2}[/tex]

[tex]766 = \sqrt{F_n^2 + 280^2}[/tex]

[tex]F_n^2 = 766^2 - 280^2[/tex]

[tex]F_n = 713 N[/tex]

now by force balance we will say

[tex]F_y + F_n = mg[/tex]

[tex]F_y = mg - F_n[/tex]

[tex]F_x = F_f[/tex]

also we know that

[tex]F_f = \mu * F_n[/tex]

[tex]280 = \mu * 713[/tex]

[tex]\mu = 0.39[/tex]

now minimum force required to set this into motion

[tex]F_{min} = \frac{\mu mg}{\sqrt{1 + \mu^2}}[/tex]

here we know that

[tex]mg = F_n = 713 N[/tex]

[tex]F_{min} = \frac{0.39* 713}{\sqrt{1 + 0.39^2}}[/tex]

[tex]F_{min} = 259 N[/tex]

So it will require 259 N minimum force to move it

AS Weight = w =mg

          m= 70kg

 g on mercury =3.7 m/s²

so  W = (70kg) ( 3.7m/s²)

      w=259 kgm/s²

w = 259 N

The internal pressure increases as the gas is heated

The planet stay in orbit due to gravity. because the gravity of the sun  keeps  the planets in their orbits,

Answer:

You can drink 18 drinks and 1.38 dollars left with you.

Explanation:

1 drink cost 1.59 dollars

You have 30 dollars with you.

Number of drinks in 30 dollars = [tex]\frac{30}{1.59}[/tex]

Number of drinks in 30 dollars = 18

From division 1.36 remains as remainder so, 1.38 dollars left with you.

Thallium (Tl) is a solid at room temperature. It has a melting point of 304 degrees Celsius and a boiling point of 1,473 degrees Celsius.

Thallium (Tl) is a chemical element that is classified as a metal. At standard temperature and pressure conditions, thallium exists in a solid state. This means that it maintains a fixed shape and volume.

The state of matter of an element or compound is determined by its melting and boiling points.

However, at room temperature (around 25 degrees Celsius), thallium remains in its solid state. It has a metallic appearance and is relatively soft and malleable.

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The answer is 4 kg m/s

because p = m x v , 2 kg x 2m/s = 4 kg m/s

Answer: The momentum of the toy car is 4 kg.m/s

Explanation:

Momentum is defined as the force that keeps the object moving.

It is also defined as the product of mass and velocity of an object.

Mathematically,

[tex]p=m\times v[/tex]

where,

p = momentum of the toy car = ?

m = mass of the toy car = 2 kg

v = velocity of the toy car = 2 m/s

Putting values in above equation, we get:

[tex]p=2kg\times 2m/s\\\\p=4kg.m/s[/tex]

Hence, the momentum of the toy car is 4 kg.m/s

Answer:

1) time t = 9 s

2) velocity v  = 26.4 m/s 2.17° east of north

Explanation:

1

Given

velocity of sea lion [tex]v_s = 40.0 kmph[/tex]

velocity of the fish [tex]v-f = 16 kmph[/tex]

Distance  between the fish and sea lion d = 60 m

Solution

Relative velocity of the sea lion with respect to the fish

[tex]v = v_s - v_f\\\\v = 40 - 16\\\\v = 24.kmph\\\\v = 24 \times \frac{1000}{60 \times 60}  m/s\\\\v = 6.67 m/s[/tex]

Time

[tex]t = \frac{d}{v} \\\\t = \frac{60}{6.67} \\\\t = 9 s[/tex]

2

Given

velocity of the truck [tex]v_t = 25 m/s[/tex]

velocity of the dog [tex]v_d = 1.75 m/s[/tex]

Angle [tex]\theta = 35.0^o[/tex]

Solution

Dog moves in north east so

Component of velocity in East

[tex]v_{d,E} = v_dsin\theta\\\\v_{d,E} = 1.75 \times sin35\\\\v_{d,E} = 1.004 m/s[/tex]

Component of velocity in North

[tex]v_{d,N} = v_dcos\theta\\\\v_{d,N} = 1.75 \times cos35\\\\v_{d,N} = 1.434 m/s[/tex]

The velocity of Dog relative to the road = velocity of the dog relative to truck + velocity of the truck relative to the road

Y component

[tex]v_y = v_t + v_{d,N}\\\\v_y = 25 + 1.434\\\\v_y = 26.434 m/s[/tex]

X component

[tex]v_x = v_{d,E}\\\\V_x = 1.004 m/s[/tex]

Velocity

[tex]v = \sqrt{v_x^{2} +v_y^{2} } \\\\v = \sqrt{1.004^2 + 26.434^2} \\\\v = 26.4 m/s[/tex]

Direction

[tex]\phi = tan^{-1}\frac{v_x}{v_y} \\\\\phi = tan^{-1}\frac{1.004}{26.434} \\\\\phi = 2.17^o east of north[/tex]

For the time and velocity:

The sea lion will catch the fish in 0.42 seconds.

The velocity of the dog relative to the road is 26.41 m/s north.

Question 1: Formula:

Relative velocity = vA - vB

The sea lion is moving at a relative velocity of 40.0 - 16.0 = 24.0 km/h faster than the fish.

The distance between the sea lion and the fish is 60.0 m, which is 0.160 km.

The time it takes the sea lion to catch the fish is:

time = distance / relative velocity

= 0.160 km / 24.0 km/h

= 0.007 h

= 0.42 seconds

Therefore, it would take the sea lion 0.42 seconds to catch the fish.

Question 2: Formula:

Relative velocity = vA + vB

The velocity of the dog relative to the road can be found by adding the velocity of the truck and the velocity of the dog.

The velocity of the truck is 25.0 m/s north.

The velocity of the dog can be broken down into two components: a northward component of 1.75 × cos(35.0°) = 1.41 m/s and an eastward component of 1.75 × sin(35.0°) = 1.18 m/s.

Therefore, the velocity of the dog relative to the road is 25.0 + 1.41 = 26.41 m/s north.

The direction of the velocity of the dog relative to the road is north.

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Answer:

Bohr atomic model

Explanation:

Bohr's atomic model:

Bohr's atomic model was proposed by Neil Bohr in 1913. In this atomic model  Neil Bohr's modified the Rutherford Model and show how electrons in an atoms moves around the nucleus in stable orbits. According to Rutherford model electron's in atoms are filled in orbits and these electron moves around the nucleus in these orbits like planets moves around the sun in fixed orbit but Rutherford's model was unable to show the stability of orbits. To solve this problem, Bohr proposed a new model b. According to this model electrons move around the nucleus in fixed size orbits which have fixed energy and the electron with low energy is filled in smaller size orbit. Radiation are emitted from atoms only when transition of electron from higher energy orbit to lower energy orbit takes place.

A. m/s is a unit for speed.

Minutes, meters, and kilometers are incorrect.

Please brainliest me if this helped; trying to level up!

The unit for speed is meter per second ( m/s).  

Answer : Option A

Explanation:

The speed is the measure of the total distance traveled over a specified or particular time. Therefore, and as we know that the unit of distance is meter and that of time is seconds according to the S. I. unit of system. Therefore the unit of speed written as the meter per second, or, m / s, or, m s -1.

In an attempt to reduce our dependence on non-renewable resources, and cut down on the harm to the environment, we could burn biomass to produce electricity.

Hello  Undeadman12

All objects in motion would have kinetic energy

:)

Hi there.

Your Question: All objects in motion have what energy ?

Kinetic Energy is the answer,  (I took this part from google) Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position).

I hope this helps, if it does, please consider marking me brainiest! <3

Area is the scalar quantity,

Answer:

The correct answer is option B.

Explanation:

Scalar quantity are those which only have magnitude and no direction.

For example:  mass, time, distance etc.

Vector quantity are those which have  both magnitude and direction.

For example:  displacement , velocity etc.

From the given options, the quantity which is scalar is are a because it only has magnitude but no directions.

Where acceleration, velocity, displacement  and force all are vector quantities.

Hence, the correct answer is option B.

To calculate acceleration from a velocity-time graph, determine the slope of the graph at a specific point by dividing the change in velocity by the change in time.

To calculate acceleration from a velocity-time graph, you need to find the slope of the graph at a specific point. Acceleration represents the rate of change of velocity, and the slope of a graph represents the rate of change of the dependent variable with respect to the independent variable.

Here are the steps to calculate acceleration from a velocity-time graph:

Identify the specific point on the graph where you want to determine the acceleration.

Draw a tangent line to the curve at that point. The tangent line should touch the curve at only one point.

Measure the slope of the tangent line. You can do this by determining the change in velocity (Δv) and the change in time (Δt) between two points on the tangent line.

Calculate the acceleration by dividing the change in velocity by the change in time: acceleration (a) = Δv / Δt.

Note: If the velocity-time graph is a straight line, the acceleration is constant throughout, and you can calculate it by taking the slope of the line directly.

Remember that the units of acceleration will depend on the units used for velocity (e.g., meters per second, miles per hour) and time (e.g., seconds, minutes).

Therefore, Determine the slope of the graph at a certain point by dividing the change in velocity by the change in time in order to calculate acceleration from a velocity-time graph.

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Force applied on the car due to engine is given as

[tex]F_1 = 300 N[/tex] towards right

Also there is a force on the car towards left due to air drag

[tex]F_2 = 150 N[/tex] towards left

now the net force on the car will be given as

[tex]\vec F_{net} = \vec F_1 + \vec F_2[/tex]

now we can say that since the two forces are here opposite in direction so here the vector sum of two forces will be the algebraic difference of the two forces.

So we can say

[tex]F_{net} = F_1 - F_2[/tex]

[tex]F_{net} = 300 - 150[/tex]

[tex]F_[net} = 150 N[/tex]

So here net force on the car will be 150 N towards right and hence it will accelerate due to same force.

If they're dropped from the same height at the same time and there's no air resistance, the the lighter ball and the heavier ball, as well as a feather, a hammer, a bowling ball, a speck of dust, a school bus, and a battle ship, will all fall side-by-side and hit the ground at the same time.  

We've known this for about 400 years, since Galileo.  And we've known WHY for about 300 years, since Newton.

After all the ice has melted, the temperature of the water inside the beaker starts to increase. The constant temperature during the melting process is due to the latent heat of fusion, and only after melting, absorbed heat increases water's temperature.

The temperature of the water inside the beaker after all of the ice melts begins to increase. When ice is in the process of melting, it absorbs heat from its surroundings without a change in temperature, maintaining a temperature of 0°C until it has completely melted. This absorption of heat at a constant temperature is due to the latent heat of fusion, which is the energy required to change a substance from the solid phase to the liquid phase at constant temperature and pressure. Once all the ice has melted, any additional heat the water absorbs increases its temperature. This is due to the fact that the energy absorbed by the water is now used to increase the kinetic energy of the water molecules, resulting in a temperature increase.

Figure 10.26 illustrates this phenomenon with a beaker of ice starting at -12.0°C and gradually warming to 0°C as it absorbs heat. Initially, a small amount melts, but the overall temperature does not increase until all of the ice is melted. Only then does the temperature of the now liquid water begin to rise, eventually reaching 22.2°C due to continued heat absorption.

30x30=900

The answer is 900 meters after 30 seconds

The car traveling at 30 metres per second will cover a total distance of 900 metres in 30 seconds, calculated using the formula distance equals speed multiplied by time.

To calculate the distance travelled by a car moving with a speed of 30 metres per second over a period of 30 seconds, we use the formula for distance which is the product of speed and time.

The distance d is calculated as follows:

Hence, substituting the given values:

Therefore, the car will travel a total distance of 900 metres in 30 seconds.

If this comes up on the exam, you should recite Newton's 3rd law of motion quietly to yourself.

The mucilage in hornwort cells is crucial for maintaining water balance, protecting the plant from drying, aiding in nutrient capturing, and promoting bacterial interaction. It ensures the plant's survival and growth prospects in various environments.

The mucilage in the spaces around the cells of hornworts serves a critical role in maintaining the plant's water balance and protecting it from drying out. It does this by absorbing water and creating a moist environment that helps in preventing water loss via transpiration. Additionally, the mucilage also aids in nutrient capturing and bacterial interaction that promotes the growth of the plant.

This is extremely important as it not only improves the plant's survival rate in various environments but also allows the plant to photosynthesize effectively, and thus, grow and propagate successfully. So, understanding the role of mucilage in hornworts is crucial for their conservation and in understanding plant adaptation mechanisms in general.

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Mucilage in hornwort cells stabilizes water content, ensuring hydration, and binds pathogens to protect against infections. It also improves root-soil contact, enhancing nutrient and water absorption. These functions are essential for the hornwort's survival and growth.

The mucilage in the spaces around the cells of hornworts plays several critical roles. Firstly, it helps to stabilize the water content of the surrounding environment, ensuring that the hornwort cells remain hydrated even during dry conditions. This is crucial for the plant's survival and growth. Additionally, the mucilage helps to bind pathogens, protecting the cells from potential infections. This dual role of maintaining hydration and offering protection is essential for the overall health and longevity of the hornwort.

Moreover, mucilage improves the contact between the root and soil, preventing gaps which would drastically reduce the absorption of water and nutrients. Additionally, the mucilage's high water content and resistance to proteolysis due to its extensive mucosylation make it an effective barrier and stabilizer in various environmental conditions.