a rock is thrown vertically upward at an initial velocity of 70 m/s. what is the approximate acceleration of the rock when it reaches its maximum height?

It takes about 265.6 seconds for the ice cube to melt in the microwave oven with a power output of 125 W and an energy requirement of 33200 J.

When an ice cube is placed in a microwave oven, the oven delivers 125 W of power to the ice cube. It takes 33200 J (joules) of energy to melt the ice cube.

To find the time it takes for the ice cube to melt, we can use the formula:

Energy = Power x Time

Since we know the power (125 W) and the energy (33200 J), we can rearrange the formula to solve for time:

Time = Energy / Power

Plugging in the values, we get:

Time = 33200 J / 125 W

Calculating this gives us the time it takes for the ice cube to melt.

Now, let's do the math:

Time = 33200 J / 125 W = 265.6 seconds

So, it takes approximately 265.6 seconds for the ice cube to melt in the microwave oven.

In conclusion, it takes about 265.6 seconds for the ice cube to melt in the microwave oven with a power output of 125 W and an energy requirement of 33200 J.

To know more about Energy visit:

https://brainly.com/question/1932868

#SPJ11

The force of friction acting on the fridge is 149.3 N.

Force of friction is the force that tends to oppose the motion of two surfaces that are in contact.

To get an object into motion the force of friction must be overcame.

The force of friction also tends to oppose the motion of an object.

The frictional force on the refrigerator is calculated by apply Newton's second law of motion.

F - Ff = ma

where;

If the refrigerator didn't budge, acceleration = 0

F - Ff = 0

F = Ff

149.3 N = Ff

Thus, when the force of friction is equal to applied force, the object won't move.

Learn more about force of friction here: https://brainly.com/question/4618599

#SPJ1

Answer:

a) The baseball spends 0.674 seconds in the air

b) The horizontal distance from the roof edge to the point where the baseball lands on the ground = 2.02 m

Explanation:

The ball's initial speed, u = 3.8 m/s

θ = 38°

The edge of the roof has a height, H = 3.30 m

The vertical motion of the baseball can be given by the equation:

\(H = U_{y} t + 0.5a_{y} t^{2}\).........(1)

Vertical acceleration of the baseball, \(a_y = 9.8 m/s^2\)

The vertical component of the initial speed can be calculated by:

\(U_y = Usin \theta\\U_y = 3.8 sin 38\\U_y = 2.34 m/s\)

Substituting the appropriate values into equation (1):

\(3.8 = 2.34 t + 0.5(9.8)} t^{2}\\4.9t^2 + 2.34t - 3.8 = 0\)

Solving for t in the quadratic equation above:

t = 0.674 s

To calculate the horizontal distance, S, use the formula below:

\(S = U_xt + 0.5a_xt^2\)

Horizontal acceleration of the baseball, \(a_x = 0 m/s^2\)

The horizontal component of the initial speed can be calculated as:

\(U_x = Ucos \theta\\U_x = 3.8 cos 38\\ U_x = 2.99 m/s\)

S = 2.99(0.674) + 0.5(0)

S = 2.02 m

The speed of a train that moves from a train station at 30 meters per second after 5 seconds and covers a distance of 100 m with an acceleration of ten meters per second square would be 80 m/s.

We can use the equation of motion to solve for the final velocity of the train:

v = u + at

where:

Substituting the values, we get:

v = 30 + 10(5)

v = 80 m/s

Therefore, the speed of the train after 5 seconds is 80 m/s.

More on speed can be found here: https://brainly.com/question/17661499

#SPJ1

It's bigger. The area surrounding a star that potentially support life and liquid water on a terrestrial planet of the correct size is known as the habitable zone.

The distance from a star at which liquid water could exist on the surfaces of circling planets is known as the "habitable zone." Habitable zones are also referred to as Goldilocks zones because they may be just suitable for life, not too hot nor too cold. It is at the proper distance from the Sun, has a magnetic field that shields it from solar radiation, has an insulating atmosphere that keeps it warm, and contains the correct chemistry for life, including carbon and water.

Learn more about magnetic here-

https://brainly.com/question/2841288

#SPJ4

From the given information, in this process the energy of the system stays the same, i.e., option c is the correct answer.

According to the law of conservation of energy, energy can neither be created nor destroyed, only transferred or converted from one form to another. In this case, the metal sphere loses heat energy as it cools down, and the liquid gains an equal amount of heat energy as it warms up. Therefore, the total amount of energy in the system remains constant throughout the process, and the energy of the system stays the same.

Since the container is insulated, there is no heat exchange with the surroundings, and no energy is transferred in or out of the system. Therefore, the energy of the system remains constant, and option c is the correct answer.

Learn more about metal here: brainly.com/question/4701542

#SPJ4

The time required to take off is 26.84 s

SOLVING THE EQUATION :

First of all, we can find the velocity at which the plane takes off, using the equation :

                    v ²-- u² = 2ad

where

v is the take-off velocity

u = 0 is the initial velocity

a is the acceleration

d = 1800 m is the distance covered

Solving for v,

                            v = √2ad

                               = √2(5)(1800)

                              =  134.3 m/s

The time needed to reach this velocity can be found by using

                                          v = u+at

And solving for t,

  \(t = \frac{v-u}{a} \\\\ = \frac{134.2-0}{5}\)

  = 26.84 s

Time needed to take off is = 26.84 s

An interesting scenario when describing the kinematic of a body (or system of bodies) is its motion under constant acceleration. Quantitative calculations for this type of motion require the use of kinematic equations, which relate the quantities that describe the motion of the body. the acceptable kinematic equation to be used depends on whatever motion quantities are given in the problem

Learn more about kinematics :

brainly.com/question/24783036

#SPJ4

Answer:

No

Explanation:

Some objects gain momentum.

Answer:

B. False

Hope you could understand.

If you have any query, feel free to ask.

The magnitude of the force on the charge by the influence of the magnetic field will be 6.6*10^-3 N

Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion.The magnitude of the magnetic force acting on the charge is given by:

\(\rm F=qvBsin\theta\)

where

The magnitude of the charge   \(q=5.7\ \mu C =5.7\times 10^{-6} \ C\)

The velocity of the charge        \(v=4.5\times 10^5\ \frac{m}{s}\)

The magnitude of the magnetic field   \(3.2\ mT=0.0032\ T\)

The angle between the directions of v and B  \(\theta =90^o-37^o=53^o\)

By substituting the values we will get:

\(F=(5.7\times 10^}-6})(4.5\times 10^5)(0.0032)(Sin53^o)\)

\(F=6.6\times 10^{-3}\ N\)

Hence the magnitude of the force on the charge by the influence of the magnetic field will be 6.6*10^-3 N

To know more about Magnetic force follow

https://brainly.com/question/14411049

Answer:

a - on edge

Explanation:

yes

Answer:

b

Explanation:

Answer:

B

Explanation:

Answer:

4.2 m/s

the balls final speed is V (m/s)

because the clay ball hits another and the two stick together

=> 0,35.4,2 + 0,35.4,2 = (0,35 + 0,35).V

<=> 2,94 = 0,7V

<=> V = 2,94/0,7 = 4,2

For a clay ball with a mass of 0.35 kg, the ball's final speed is mathematically given as

V2= 4.2

Question Parameter(s):

A clay ball with a mass of 0.35 kg

Hits another 0.35 kg ball at rest and the two stick together.

The first ball's initial speed is 4.2m/s.

Generally, the equation for the conservation of momentum is mathematically given as

M1v1=m2v2

Therefore

0.35*4.2 + 0.3*5.4.2 = (0.35 + 0.35)*V

2,94 = 0,.7V

V2 = 2.94/0.7

V2 = 4.2

In conclusion

V2= 4.2

Read more about Speed

https://brainly.com/question/4931057

#SPJ2

The given chemical reaction represents photosynthesis, which is the process of converting light energy into chemical energy. The reactants of this reaction are energy from the sun, six carbon dioxide molecules, and six water molecules. These reactants undergo a complex series of reactions that ultimately result in the production of oxygen gas and glucose.

The energy from the sun is absorbed by pigments in the chloroplasts of plant cells, including chlorophyll. This energy is used to power a series of redox reactions, during which the carbon dioxide is reduced to form glucose.

The oxygen gas produced during photosynthesis is a byproduct of the oxidation of water, which is split into hydrogen ions and oxygen molecules. This process, known as photolysis, requires energy from the sun.

The glucose produced during photosynthesis is an important source of energy for the plant. It is used in cellular respiration to produce ATP, which is used to power the metabolic processes of the cell. Overall, photosynthesis is a complex and essential process that plays a critical role in the biosphere.

For more such questions on, click on:

https://brainly.com/question/19160081

#SPJ8

The body has acquired approximately 9.375 x 10^13 excess electrons. It has a collective mass of approximately 8.54 x 10^-17 kilograms.

To determine the number of excess electrons acquired, we can use the charge of a single electron, which is approximately -1.6 x 10^-19 coulombs.

Given that the body has a charge of -15 uC, we can calculate the number of excess electrons using the formula:

Number of excess electrons = (total charge) / (charge of a single electron)

Substituting the values:

Number of excess electrons = (-15 x 10^-6 C) / (-1.6 x 10^-19 C)

Calculating this, we find that the body has acquired approximately 9.375 x 10^13 excess electrons.

To find the collective mass of these electrons, we need to know the mass of a single electron, which is approximately 9.109 x 10^-31 kilograms.

The collective mass of the excess electrons can be calculated using the formula:

Collective mass = (number of excess electrons) x (mass of a single electron)

Substituting the values:

Collective mass = (9.375 x 10^13) x (9.109 x 10^-31 kg)

Calculating this, we find that the collective mass of the excess electrons is approximately 8.54 x 10^-17 kilograms.

To know more about electrons,

https://brainly.com/question/6283462

#SPJ11

Answer:

H= Mass × specific heat capacity ×change in temperature

= 2×380×(10-0)

=2×380×10

=7600 Joules

Energy can neither be created nor destroyed, but it can be transferred. First law of thermodynamics.

This is the ability or capacity to do work. we know that the first law of thermodynamics explains energy conservation. thus, energy can neither be created nor destroyed.

Also, Zeroth's law of thermodynamics talks about the thermal equilibrium of two or more bodies. thus, if body A and Body B are in thermal equilibrium with body C. that body A, B, and C are all in thermal equilibrium with each other.

Again, the second law of thermodynamics says more about heat direction.

Therefore, the thermodynamics supports that the heat cannot be transferred from a colder to a hotter body.

Learn more about thermodynamics, click

https://brainly.com/question/13059309

#SPJ4

Answer:

1350 meters

Explanation:

this is easy

15 meters per second

90 seconds

90 * 15 = 1350

Answer:

C, 1800kg/s

Explanation:

You multiply the mass (300) by the change in the two velocities (6-0=0). Then you’ll get 1800.. sorry if I’m wrong

Therefore, the magnitude of the magnetic field inside the solenoid is 1.12 × \(10^{-4\) T.

The magnetic field inside a solenoid can be calculated using the formula:

B = μ0 * n * I

where μ0 is the permeability of free space, n is the number of turns per unit length, and I is the current.

First, we need to calculate the number of turns per unit length, which is given by:

n = N / L

where N is the total number of turns and L is the length of the solenoid. Plugging in the values, we get:

n = 1060 / 126 cm = 8.4138 turns/cm

To convert this to turns/meter (since SI units are used for permeability), we divide by 100:

n = 8.4138 turns/cm / 100 cm/m = 0.08414 turns/m

Now we can calculate the magnetic field using the formula:

B = μ0 * n * I

The permeability of free space is μ0 = 4π × 10^-7 T·m/A, so we have:

B = 4π × kgT·m/A * 0.08414 turns/m * 5.34 A

B = 1.12 × × \(10^{-4\)  T

Learn more about magnitude Visit: brainly.com/question/30337362

#SPJ4

Answer:

2910

Explanation:

970 × 3. 970 in one hour × 3 hrs. 2910 kilometers

The wavelength of the light with specified separation and angle is calculated to be 578.45 nm.

The formula for light going through a double slit with separation is,

d = 2.42 × 10⁻⁵ m.

Line number m = 2

Angle θ = 2.74°

The wavelength is the separation between the peak and trough of two sound waves.

To find the wavelength, here we use the formula as,

sin θ = Line number × λ ÷ (distance)

where,

λ is wavelength

By substituting all the given values,

Sin (2.74°) = 2 × λ ÷ (2.42 × 10⁻⁵)

Rearranging the equation,

λ = [Sin (2.74°)×(2.42 × 10⁻⁵] ÷ (2)

λ = 578.45 nm.

Thus, wavelength λ of the light is calculated to be 578.45 nm.

To know more about wavelength:

https://brainly.com/question/12924624

#SPJ4

Answer:

try this

Explanation:

The energy of a falling object when it hits the ground is equaled to the energy it starts with because the potential energy is converted into kinetic energy entirely with the height at 0. This means the energy would be 200 J.

RESULT

When the rock is submerged, it displaces a certain volume of water. The weight of this water is equal to the buoyant force acting on the rock. In this case, the buoyant force is 2 N.

The buoyant force on an object is equal to the weight of the fluid displaced by the object. In this case, the rock displaces a certain volume of water when submerged. We can use Archimedes' principle to calculate the buoyant force.

First, let's find the volume of water displaced by the rock. We know that the weight of the rock is 3 N when submerged, which means it is experiencing an upward buoyant force of 3 N. This buoyant force is equal to the weight of the water displaced by the rock.

Next, let's find the weight of the water displaced by the rock. We know that the weight of the rock is 5 N when out of the water. This weight is equal to the weight of the rock plus the weight of the water displaced by the rock.

So, the weight of the water displaced by the rock is 5 N - 3 N = 2 N.

Now, we can calculate the buoyant force. The buoyant force is equal to the weight of the water displaced by the rock, which is 2 N.

Therefore, the buoyant force on the rock is 2 N.

To know more about force visit:

https://brainly.com/question/30507236

#SPJ11

The S.I. unit of E is NC^-1 and that of B is NA^-1 m^-1, then unit of E/B is A m/C (ampere meter per coulomb). This unit represents the ratio between the electric field and the magnetic field, indicating the strength and direction of the electromagnetic field.

The SI unit of electric field (E) is NC^(-1) (newton per coulomb) and the SI unit of magnetic field (B) is NA^(-1) m^(-1) (tesla). To determine the unit of E/B, we need to divide the unit of E by the unit of B.

Dividing the unit of E (NC^(-1)) by the unit of B (NA^(-1) m^(-1)), we can simplify the expression:

E/B = (NC^(-1))/(NA^(-1) m^(-1))

To simplify this expression, we can cancel out the common units in the numerator and denominator:

E/B = (N/C)/(N/(A m))

Now, let's simplify further by dividing the numerator and denominator:

E/B = (N/C) * (A m/N)

Canceling out the common units:

E/B = (A m)/(C)

Therefore, the unit of E/B is A m/C (ampere meter per coulomb).

For more such questions on SI unit, click on:

https://brainly.com/question/16393390

#SPJ8

After six half-lives, 1/64th (or 0.015625) of the original sample of radioactive atoms remains.

A fraction of 1/64 of the radioactive atoms remains after six half-lives. This is because the rate of decay of a radioactive material is exponential, meaning that each half-life will reduce the amount of radioactive atoms by half. After 6 half-lives, the amount of radioactive atoms remaining is 1/2 multiplied by itself 6 times, which equals 1/64.

The fraction of radioactive atoms is the fraction of atoms in a sample that are unstable and decaying. This fraction can be determined by measuring the rate of decay of the sample over time. The fraction is usually expressed as a percentage, and it is related to the half-life of the sample, which is the time it takes for half of the atoms in the sample to decay.

To learn more about radioactive atoms:

brainly.com/question/19637416

#SPJ4

A) The velocity of the two freight car is 1.83 m/s, B) The impulse exerted on each freight train car is 22000 kg-m/s, C) The net force exerted on each freight train car is 31428.6 N.

Mass of the loaded freight car, m₁ = 10000 kg

Initial velocity of the loaded freight car, v₁ = 3 m/s

Mass of the empty freight car, m₂ = 2000 kg

Velocity of the empty freight car, v₂ = -4 m/s

Let the velocity of the coupled car after collision, = v

By the law of conservation of momentum,

m₁v₁ + m₂v₂ = (m₁+m₂)v

A) v = (10000×3 - 2000×4)/(10000+2000)

    v = 1.83 m/s

B) Impulse = change in momentum(Δp)

Δp = 10000×3 - 2000×4 = 22000 kg-m/s

C) Net force, F = Impulse/time = 22000/0.7

  F = 31428.6 N

D) The collision is inelastic as the final speed of both the car is less than their initial velocities.

To know more about impulse, here

https://brainly.com/question/904448

#SPJ4

Both Frank Capra and John Ford, renowned filmmakers of the classical Hollywood era, had their own unique ways of interacting with the star system prevalent during that time.

1. Frank Capra:

Frank Capra was known for his directorial work on films that often focused on the common man and celebrated American values. He had a collaborative approach to working with stars, particularly his frequent collaborator Jimmy Stewart. Capra believed in creating a comfortable and supportive environment on set, allowing his actors to explore and bring their characters to life. He had a reputation for nurturing the talents of his actors and enabling them to deliver memorable performances.

2. John Ford:

John Ford, a highly influential filmmaker known for his Westerns and sweeping epics, had a different style of interaction with the star system. Ford had a long-standing collaboration with actor John Wayne, who became synonymous with his films. Wayne's rugged, masculine persona was frequently featured in Ford's Westerns, such as "Stagecoach" and "The Searchers."

Both Capra and Ford recognized the significance of stars in their films, using them as vehicles to connect with audiences. They employed different strategies to collaborate with their stars, whether it was Capra's nurturing approach or Ford's ability to harness and enhance their iconic qualities.

Learn more about interacting  here

https://brainly.com/question/33403251

#SPJ11

When cross-checking a certificate of insurance, there are several essential things to consider: Verify if subcontractor insurance is primary to yours, Review the material change endorsement procedure, Check the additional insured status.

a) Verify if subcontractor insurance is primary to yours: This is important to ensure that in the event of a claim or loss, the subcontractor's insurance coverage takes precedence over your own. Confirm that the certificate clearly states that the subcontractor's insurance is primary and not just excess or secondary to your coverage.

b) Review the material change endorsement procedure: Understand the process for updating the certificate of insurance if there are any material changes to the coverage, such as modifications in policy limits, policy cancellations, or changes in coverage terms. Make sure the procedure aligns with your requirements and that you are promptly notified of any modifications.

c) Check the additional insured status: Determine if your business is listed as an additional insured on the certificate. This provides you with coverage under the subcontractor's insurance policy for certain liabilities arising from their work. Confirm that the certificate clearly identifies your business as an additional insured and specifies the scope of coverage.

Additionally, it's crucial to verify that the certificate of insurance is up to date, with accurate policy information, valid dates of coverage, and adequate policy limits for the required coverage types. Ensure the insurance provider's name, contact details, and policy numbers are correct.

Learn more about certificate of insurance here:

brainly.com/question/9395396

#SPJ11

Answer:

They are called beneficial mutations. They lead to new versions of proteins that help organisms adapt to changes in their environment. Beneficial mutations are essential for evolution to occur. They increase an organism's changes of surviving or reproducing, so they are likely to become more common over time.

Explanation:

      Maybe this graph can help?