a car accelerates uniformly in a straight line from rest at the rate of 2.2 m/s2 . what is the speed of the car after it has traveled 52 m?

The amount of heat the cup absorb is 1003200 J.

Given,

Mass of coffee cup = 4.00 × 100 g or 4 kg

Room temperature = 20°C

Hot water temperature = 80°C

We have to find the amount of heat the cup absorbed.

Now, by using the specific heat formula, we have

Q = mCΔT

Where m is the mass of the substance, c is the specific heat, ΔT is the change in temperature, and Q is the amount of heat received or lost.

Putting the values, we get

Q = 4 × 4180 × (80°- 20°)

Q = 1003200 J/kg K

Hence, the amount of heat absorbed by the cup is 1003200 J/kg K.

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Answer:

106.8

Explanation:

If you multiply 6 and 17.8, you'll get 106.8.

If that's wrong, my apology's !

Answer:

smaller and further from

Explanation:

Pass light through something clear and light, you'll most likely be able to see all of it's rays spread out, the "normal." Now, pass it through something dense, the amount of light will shrink, therefore be further from the "normal."

The density of the unknown sample is 0.67 g/ml.

To calculate the density, we use the formula:

Density = Mass / Volume

Mass = 38.00 g

Volume = 56.39 ml

Substituting the values into the formula:

Density = 38.00 g / 56.39 ml

Dividing the mass by the volume, we find:

Density = 0.674 g/ml

Rounding to two decimal places, the density of the unknown sample is 0.67 g/ml.

Density is a measure of how much mass is contained within a given volume. In this case, we are given the mass of the unknown sample as 38.00 g and its volume as 56.39 ml. To find the density, we divide the mass by the volume. By performing the calculation, we obtain a density of 0.674 g/ml.

When rounding the value to two decimal places, the density of the unknown sample is 0.67 g/ml. This means that for every milliliter of the sample, there is 0.67 grams of mass. Density is an important property in chemistry and materials science as it can help identify substances and determine their behavior in various applications.

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Answer:

They are Attractive intermolecular forces and Dispersive intermolecular forces. Attractive intermolecular forces are classified into Hydrogen bonding (H-Bonding) and Ionic bonding (Ion-induced dipole forces).

Explanation:

Hope its Help po

Answer:

true

Explanation:

Answer: True

Explanation:

Answer:

We applicate formula:

I = V/R

Replacing acording data:

I = 12 V / 10 Ω

I = 1,2 A

Result:

The current is of 1,2 Amperes.

Answer:

1.2 amps

Explanation:

I = V/R

V = 12

R = 10

12/10 = 1.2 amperes (amps)

The electrons within a rectangular rod will move away when a negatively charged balloon is brought near a negatively charged rod because the electrons are repelled by each other.

Electrostatics is the study of charges at rest.

Charges at rest are charges that are not free to move or charges that do not have a path for them to flow.

The flow of electrons results in an electric current. However, when charged materials are brought near other charged materials, they will either be repelled or attracted to each other depending on the nature of the charges.

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The intrinsic property that we can estimate with unaided eye, when looking at brightest stars, is temperature .

The intrinsic properties of stars are those which does not depend upon the distance of star from the earth e.g. temperature, mass, diameter, etc.

The temperature can be estimated by an unaided eye as the red stars are known to be cooler than the blue ones. The other intrinsic properties can't be predicted by unaided eye and require special optical instruments to make the observations. By the beginning of the 20th century, astronomers understood how to measure these intrinsic properties. Other than the temperature , the other important intrinsic property is the luminosity which can be determined by measuring the distance of star and its apparent brightness.

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Specific heat is quantity of heat required to increase the temperature of a substance by one degree celsius.

The formula to calculate heat energy is

Q=mc∆T

We know, Q=mc∆T

Where Q = heat energy

m = mass

c= specific heat capacity

∆T= change in temperature

Thus,

According to above formula

c= Q/m∆T

Here m= 2 kg

∆T= 5 degrees

Q= 2000 joules

c= 2000/2×5

c= 200

Thus, the specific heat capacity of the block is 200.

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The given statement "after you have driven through standing water, you should apply heavy brake pedal pressure for a short distance to make sure your brakes are still working properly" is false.  

After you have driven through standing water, it is not recommended to apply heavy brake pedal pressure for a short distance. Here's why:

1. When you drive through standing water, your brakes can get wet and become less effective. This is because water can get into the brake components, such as the brake pads and rotors, causing them to become slippery.                      

2. Applying heavy brake pedal pressure immediately after driving through standing water can cause your wheels to lock up and skid. This can lead to a loss of control of your vehicle and potentially result in an accident.                          

3. Instead of applying heavy brake pedal pressure, it is advisable to lightly tap your brakes a few times after driving through standing water. This will help to remove any excess water from the brake components and restore their effectiveness.                                                                  

4. Additionally, it is important to drive at a slower speed and maintain a safe distance from other vehicles after driving through standing water. This will give your brakes more time to dry out and regain their normal functionality.                    

In conclusion, after driving through standing water, it is not recommended to apply heavy brake pedal pressure for a short distance. Instead, lightly tap your brakes a few times to remove excess water and drive at a slower speed until your brakes have dried out. This will help ensure that your brakes are working properly and maintain your safety on the road.

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False. After driving through standing water, you should not apply heavy brake pedal pressure. Instead, you should gently and lightly tap the brakes a few times to dry them out.

False. After driving through standing water, you should not apply heavy brake pedal pressure. Instead, you should gently and lightly tap the brakes a few times to dry them out. This helps to remove any excess water from the brake pads or shoes, allowing them to work effectively. Applying heavy brake pedal pressure can cause the brakes to lock up and potentially lead to a loss of control.

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The D. critical path is a series of events and activities with no slack time.

It is a path that defines the longest duration required to complete a project. It is significant in the project management methodology as it helps the project manager establish a timeline for the project while also identifying the activities that are most critical to the project's completion. If an activity on the critical path takes longer than anticipated, the whole project will be delayed, and if an activity is completed earlier than expected, then it might not be worth it to continue the project, and the client might not be willing to pay for it.

The critical path analysis allows managers to identify and control the critical factors that can impact a project's success, enabling them to focus on the most important areas and make informed decisions about the project. So the correct answer is D. critical path, is a series of events and activities with no slack time.

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Answer:

Momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction.

Answer:

Waves and Energy:

The speed of a wave is dependant on four factors: wavelength, frequency, medium, and temperature. Wave speed is calculated by multiplying the wavelength times the frequency (speed = l * f).

Explanation:

brainlest pls if u can ty ! i hope its helped.

The definition of a motion wave is the transfer of energy and momentum between two places in a medium without the physical movement of any substance.

The waves that occur on the surface of water are the ones that people are most familiar with, but waves can also be caused by disturbances in sound and light waves, and the motion of subatomic particles also has wavelike features. As a result, the study of waves is fundamental to the fields of physics and engineering. Vibrations in elastic media, like air, crystalline solids, or stretched strings, are the basic forms of wave motion.

In wave motion, the medium's particles vibrate with relation to their average positions. The medium's particles are not in constant motion from one location to another. When a wave moves across a medium, it does so uniformly in all directions. A wave's velocity is affected by the characteristics of the medium it traverses. When a medium is moving in a wave, energy is being transferred from one location to another. Nothing material can go through the medium. At the time of a wave's passage, the medium as a whole remains stationary. As opposed to the medium itself, only the disturbance moves.

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Answer:

B

Explanation:

the Halogen families have 7 valence electrons

The total amount of energy transformed into internal energy in the resistors is 50J.

According to ohm's law , there are two batteries of 10V and two resistors of 10 ohms and 15 ohms respectively, connected in parallel. According to Ohm's law, the current through each resistor can be calculated as I = V/R, where V is the voltage of the battery and R is the resistance of the resistor. Thus, the current through each resistor is 1A and 2A respectively.

Since the batteries are connected in parallel, the voltage across each battery is the same and equal to 10V. Therefore, the current through each branch of the circuit is the sum of the currents through the resistors connected in that branch, which gives a current of 2A in each branch.

The energy delivered by each battery can be calculated as the product of the voltage and the charge delivered, which is given by Q = I*t, where I is the current and t is the time. As the time is not given, we assume it to be 1 second. Thus, the energy delivered by each battery is 20J and 30J respectively.

The energy delivered to each resistor can be calculated as the product of the voltage and the current, which is given by P = V*I. Thus, the energy delivered to the 10 ohm resistor is 20J and the energy delivered to the 15 ohm resistor is 30J.

The type of energy storage transformation that occurs in the operation of the circuit is electrical to thermal. As the current passes through the resistors, some of the electrical energy is converted into thermal energy due to the resistance of the resistors.

The total amount of energy transformed into internal energy in the resistors can be calculated as the sum of the energy delivered to each resistor, which gives a total of 50J.

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Answer:

O The resistor decreases the current by transforming electrical energy into different types of energy

Explanation:

resistors convert elec energy to heat

Answer:

D

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The total amount of revenue collected from $1 per unit tariff on this product will be $7.

What is revenue from tariffs?

A tax rate known as a revenue tariff is one that is used to obtain direct income from company revenues. The level of prices is significantly impacted by a revenue tariff.

How do tariffs bring in money?

As imports reach the domestic market, the government will earn more money because a tariff is a tax. Since import prices are artificially inflated, domestic sectors also profit from less competition.

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I understand that the question you are looking for is "The total amount of revenue collected from a $1-per-unit tariff on this product will be: $22. $14. $8. $7".

Answer:

13 N

Explanation:

From the question,

If two forces act at right angle to each other, Their result force can be calculated using Pythagoras theorem.

R'² = R₁²+R₂²....................... Equation 1

Where R' = Resultant force, R₁ = First force, R₂ = Second force.

Given: R₁ = 12 N, R₂ = 5 N

Substitute these values into equation 1

R'² = 12²+5²

R'² = 144+25

R'² = 169

R' = \(\sqrt{169}\)

R' = 13 N.

Hence the resultant force is 13 N

Answer:

1875 J

Explanation:

kinetic energy= \(\frac{1}{2}\)×mass×velocity²

K.E=\(\frac{1}{2}\)mv²

K.E=\(\frac{1}{2}\)×150×5.0²

K.E= 1875 J

Answer:

C)Gravitational force would decrease by a factor of 2.

Explanation:

Hope this helps :)

Torque Formula:

T = d * F * sin angle

a) if the force is doubled, torque is doubled ( directly proportional)

For example, if force is 2 N, and distance is 2 m ,

T= 2*2* sin 90 = 4 Nm

If force is doubled:

T= 2*4 * sin90 = 8 Nm

b) If the distance of the center of rotation is doubled , Torque is also doubled ( same as "a")

c) If angle decreases 45° (90 - 45 = 45 )

T= 2*2*sin45 = 2.82 Nm

Torque also decreases

Answer:

1. Solar wind: a stream of plasma.

2. Coronal mass ejection: includes prominences and solar flares.

3. Gamma ray photon: energy released during nuclear fusion.

Explanation:

1. Solar wind: a stream of plasma i.e charged particles such as ions, protons, alpha, and electrons that continuously escape at high speed from the Sun because of the very hot plasma contained in the solar corona.

2. Coronal mass ejection: includes prominences and solar flares that flow outward into interplanetary space. Thus, it's a release of solar wind plasma and magnetic field from the outer atmosphere or corona of the sun.

Additionally, a solar prominence is also known as filament and it can be defined as a large, bright, dense cloud of luminous ionized gas such as hydrogen, sodium calcium, etc., that erupts (extends) from the surface of the sun. It can linger in the corona for a very long time, reaching hundreds of thousands of kilometers into the sun's atmosphere (space).

3. Gamma ray photon: energy released during nuclear fusion of radioactive isotopes such as cobalt-60 or cesium-137. It has the shortest wavelength and highest energy in the electromagnetic radiation spectrum.

An electromagnetic spectrum refers to a range of frequency and wavelength that an electromagnetic wave is distributed or extends. The electromagnetic spectrum comprises of gamma rays, visible light, ultraviolet radiation, x-rays, radio waves, and infrared radiation.

We have that the velocity of the ball when it hits the glass.Using the appropriate significant figures is

V=4.43ft/s

From the question we are told that

Generally the equation for the Velocity  is mathematically given as

\(V^2=2as\\\\Therefore\\\\V=\sqrt{2*9.8*1}\\\\V=4.43ft/s\)

Therefore

the velocity of the ball when it hits the glass.Using the appropriate significant figures is

V=4.43ft/s

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Answer:

There is absolutely No relationship between the weight of an object (which is constant) and the frictional force. If a block is sliding on a surface, that surface will be exerting a force on the block. That force can be resolved into a component parallel to the surface (which we call the frictional component), and a component perpendicular to the surface (called the normal component). For many situations, we find experimentally that the frictional component is approximately proportional to the normal component. The frictional component divided by the normal component is defined to be a quantity called the coefficient of kinetic or sliding friction. The coefficient of kinetic friction obviously depends on the nature of the surfaces involved. The normal component on an object can be decreased if you pull in the direction of the normal component (the weight does not change). However pulling this way on the object not only decreases the normal component, but it also decreases the frictional component since they are proportional. This is why it is easier to slide something if you pull up on it while you push it. If you push down, the normal and frictional components increase so it is harder to slide the object. The weight of an object is the downward force exerted by Earth’s gravity on that object, and it does not change no matter how you push or pull on the object.

.Answer: All options are correct.

What is sports medicine specialist?

--Sports medicine is a branch of medicine that deals with physical fitness and the treatment and prevention of injuries related to sports and exercise.

Lets understand every points--

1. During playing any sports if a person get any type of injury , at that situation it need instant relief to continue the game. So first option is correct i.e it performs emergency medical care.

2. Many times during heavy injury sportsman require surgery to get again health life.And surgery needs time., so that's why second option is also correcti e performs long term medical care

3.Without diagnosis surgery is not possible i.e. thirds option is also correct.

4. Also sports medicine specialist provide training and such types of exercise so that body as soon as possible i .e forth option is also correct.

from above discussion we see all points.

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Remote-control toys make use of pulse code modulation.

Pulse-width modulation (PWM), pulse-position modulation (PPM), and more recently spread-spectrum technology are used in typical radio control systems for radio-controlled models, and servomechanisms are used to activate the various control surfaces. Digital modulation is used in all current infrared remote control designs. Amplitude Shift Keying (ASK) and Frequency Shift Keying (FSK) are two fundamental types of digital modulation. (FSK).

Electronic communication is where amplitude modulation is most commonly utilised. This method is being utilised in numerous communication channels, including computer modems, citizens band radio, VHF aviation radio, and portable two-way radios.

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