While using heated car seats and running the fan on the car’s heater. What type of energy transfer does she use while staying warm in her car?

Explanation:

Assume that the rock has a constant density,

then the density = volume/mass = 0.25g/cm^3.

Answer:

4 g/cm^3

Explanation:

Density can be found by dividing the mass by the volume.

d=m/v

We know that the mass of the rock is 24 gram. We also know the volume of the rock is 6 cubic centimeters.

m=24 g

v= 6 cm^3

Substitute the values into the formula and divide.

d= 24 g / 6 cm^3

d= 4 g/cm^3

The density of the rock is 4 grams per cubic centimeter.

Answer:

1.63 \(ms^{-2}\)

Explanation:

The equation \(g = \frac{G*M}{R^2}\) would be used where:

g = acceleration due to gravity

G = universal gravitational constant (6.67408 × \(10^{-11}\) \(m^{3} kg^{-1} s^{-2}\))

M = mass

R = radius.

assuming the values following both 10s of the mass and radius are their exponents, which is a little confusing, the values given would simply be substituted.

Anyone can correct me if I'm wrong.

Answer:

What I think that Jose's grandmother meant by saying that the bread was too dense is that she thinks the bread is too heavy or it can even mean to be too compacted in substance. The matter in the bread are close together and not spread out like in the air, when the matter in the air starts to come closer together it starts to make fog, because it is becoming more dense. Some more things that are heavy or dense are things like a big stereo speaker, an anvil, or even a big piece of wood used to build.

Explanation:

Answer:

555

Explanation:

Take your car as soon as possible to a service facility if the brakes pulse when ABS is engaged. On gravel or recently fallen snow, stopping time may be increased while utilizing ABS.

How do you figure out time in physics?

The Physics Formula for Time. The following are some basic formulas: 1) To calculate speed, use the formula Speed = (frac Distance Time). 2) How to calculate distance: Speed divided by time equals distance. 3. To determine the time: Time equals (frac) Distance x Speed. The following mathematical formulas are available: S equals (frac dt). d = s + t, and t = (frac ds + d) Where,

What is the time theory?

Although the concept of time seems simple, physicists concur that it is a difficult topic to fully comprehend. The most common definition of time in sciences is that it is measured in milliseconds, minutes, hours, etc. Yet, defining "time" is a more challenging topic for physics to discuss.

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Answer:

At the midpoint of the line joining the two equal charges

Explanation:

The midpoint of the line joining the two equal charges has equal distance from each charge. Since the charges are at x = a and x = -a, at the midpoint of the line joining the two equal charges, the magnitude of the electric field experienced as a result of each charge is the same. But these two fields are in opposite direction, hence the net resulting electric field would be equal to zero.

Question:

A roller-coaster vehicle has a mass of 500 kg when fully loaded with passengers.  If the vehicle has a speed of 20.0 m/s at point A, what is the force exerted by the track on the vehicle at this point?

See attachment

Answer:

33700 Newton

Explanation:

Given

\(m = 500kg\\v = 24.0m/s\\r=10m\)

First, we determine the forces acting on mass m.

They are: the force exerted by the track (Fn) and the weight of the vehicle (W)

So, the net force is:

\(F_{net} = F_n - W\)

\(W=mg\)

So:

\(F_{net} = F_n - mg\)

Make Fn the subject

\(F_n = F_{net} + mg\)

Fnet is calculated as:

\(F_{net} = F_c = \frac{mv^2}{r}\) --- i.e. the centripetal force

So:

\(F_n = F_{net} + mg\)

\(F_n = \frac{mv^2}{r} + mg\)

\(F_n = \frac{500 * 24^2}{10} + 500 * 9.8\)

\(F_n = 28800 + 4900\)

\(F_n = 33700N\)

Orbital velocity of satellite

\(v = \sqrt{ \frac{gm}{r} } \)

Radius of new orbit r' =6r

Thus new orbital velocity of satellite:

\(v = \sqrt{ \frac{gm}{6r} } = \frac{v}{ \sqrt{6} } \)

For satellites in circular orbits, the relationship between orbital velocity and altitude is strict. The task of a satellite launch rocket is to release the satellite at a suitable place in space, with the appropriate speed and direction of movement to put it in the desired orbit.

How a satellite stays in orbit can be thought of in two equivalent ways, both of which explain the relationship between the satellite's altitude and velocity.

The motion of the satellite can be seen as creating a centrifugal force that opposes the gravitational pull. For example, imagine attaching an object to a string and swinging it in a circle. The object is pulling outward against the string, and that outward force (centrifugal force) becomes greater the faster the object swings. At the right speed, the centrifugal force of the satellite due to motion around the earth just balances the gravitational pull, and the satellite remains in orbit.

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To produce non-accelerated motion, an additional force of 200N is needed, exerted in the backward direction to balance the net force (600N - 400N = 200N).

When two horizontal forces are exerted on a cart, 600N forward and 400N backward, the cart undergoes acceleration. To produce nonaccelerated motion, the additional force needed would be equal and opposite to the net force acting on the cart. In this case, the net force is 200N forward (600N forward - 400N backward), so an additional force of 200N backward would be needed to produce nonaccelerated motion.

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The two closest isotopes for gold-197 are gold-196 and gold-198.

The atomic number of gold is 79, which means it has 79 protons. Gold-197 refers to the isotope of gold with a mass number of 197, indicating the total number of protons and neutrons in the nucleus.

The two closest isotopes to gold-197 are:

1. Gold-196: It has 79 protons and 117 neutrons (197 - 79 = 118).

2. Gold-198: It has 79 protons and 119 neutrons (197 - 79 = 118).

Therefore, the two closest isotopes to gold-197 are gold-196 and gold-198, with the number of neutrons being the only difference between them.

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The time that is saved by speeding past the school, endangering pedestrians and risking an expensive fine and poor insurance rating is 0.061 mins.

We define the speed as the ratio of the distance to the time. We know that when a body is in motion, the distance of the object would change with time. The first thing that we need to do is to convert the  distance to miles.

Given that

1 yard = 5.7 * 10^-4 miles

150 yards =  150 yards  * 5.7 * 10^-4 miles/ 1 yard

= 0.0855 miles

Thus;

Speed = distance/time

If he drives at the 35 mph speed;

Time taken =  0.0855 miles/35 mph

= 0.0024 hours or 0.144 mins

If he drives at the 25 mph speed

Time taken =  0.0855 miles/25 mph

= 0.00342 hours or 0.205 mins

Time saved = 0.205 mins -  0.144 mins = 0.061 mins

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\(velocity = \frac{distance}{time} \)

\( \frac{(30 + 10 + 80) \times 1000}{83 \times 60} \)

\( = 0.024m.{s}^{ - 1} \)

Answer:

i don`t get it

Explanation:

Answer:

Just as images are reflected from the surface of a mirror, light reflected from a smooth water surface also produced a clear image. ... Consequently, the outgoing rays are reflected at many different angles and the image is disrupted. Reflection from such a rough surface is called diffuse reflection and appears matte.

Explanation:

hi po I hope it's help you

To estimate the magnetic field 1 meter from a lightning bolt, we can use Ampere's Law, which relates the magnetic field around a current-carrying conductor to the current.

∮ B · dl = μ₀ * I_enc

B * 2π * r = μ₀ * (10^4 A)

B = (μ₀ * 10^4 A) / (2π * r)

Ampere's Law states that the magnetic field (B) around a long, straight conductor is proportional to the current (I) and inversely proportional to the distance (r) from the conductor: B = (μ₀ * I) / (2π * r)

Where μ₀ is the permeability of free space, approximately equal to 4π × 10^(-7) Tm/A.

Given that the typical current in a lightning bolt is 10^4 A and we want to estimate the magnetic field at a distance of 1 meter (r = 1 m), we can substitute these values into the equation:

B = (4π × 10^(-7) Tm/A * 10^4 A) / (2π * 1 m)

Simplifying the equation, we find:

B ≈ (2 × 10^(-3) T) / (2 m)

B ≈ 10^(-3) T

Therefore, the estimated magnetic field 1 meter from the lightning bolt is approximately 10^(-3) Tesla (T).

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The distance between adjacent slits in this diffraction grating is approximately 2.22 × 10^-3 meters or 2.22 micrometers.

The distance between adjacent slits in a diffraction grating can be found using the formula:

d = 1/N

where d is the distance between adjacent slits and N is the number of slits per unit length. In this case, N = 45,000 slits/cm. Converting to slits/m, we have:

N = 45,000 slits/cm x (1 m/100 cm) = 450 slits/m

Substituting into the formula, we get:

d = 1/N = 1/450 slits/m ≈ 2.22 × 10^-3 m/slit

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Answer:

3 meters

Explanation:

Velocity = displacement/time

Displacement=velocity×time

As, time from 7 to 8 is 1 sec. And velocity increases from 0 to 3 m/s

So, Displacement = 3×1

=3m

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The acceleration of the skateboarder is calculated out to bbe -2.33 m/s^2, when travelled at 7 meters per second.

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Bag's motion is ,a straight line with a constant slope (positive slope) and positive value represents a positive, steady velocity (upwards sloping).

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The acceleration of the car is 1.66 m per sec square.

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is accelerating.

Initial velocity=0

Final velocity= 60km/hr

To convert it into m/sec

1 km=1000 m

1 hr=3600 sec

So= (60×1000)÷3600=16.66 m/sec

time=10 sec

We know that acceleration is the rate of change of velocity per unit of time.

acceleration=(final velocity-initial velocity)÷ time taken

                     = (16.66-0)÷10

                     = 1.66 m per sec square

So, Acceleration will be, 1.66 m per sec square

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We will have 1.25 kilograms of nitrogen-13 left in the sample after three half-lives, or 2988 minutes, have passed.

The radioactive decay of nitrogen-13 is governed by the following equation:N-13 → C-13 + e+ + ν (1)

The decay of nitrogen-13 to carbon-13 releases a positron and a neutrino. Because mass is conserved in the decay process, the sum of the masses of the nitrogen-13 and positron must be equal to the mass of the carbon-13 and neutrino. Furthermore, the charge must be conserved; the nucleus of the nitrogen-13 has a charge of 7, whereas the carbon-13 nucleus has a charge of 6.

As a result, a proton is transformed into a neutron and a positron is released. Because the half-life of nitrogen-13 is 996 minutes,

the decay constant λ is λ=0.693/t1/2=(0.693/996 minutes) = 0.0006955 min-1

Thus, after t minutes, the quantity N of radioactive nitrogen-13 remaining in the sample is given by:

N = N0 e–λt

where N0 is the initial quantity of nitrogen-13 in the sample.

Initially, we had 10 kilograms of nitrogen-13 in the sample; thus N0=10 kg. We need to find N after 2988 minutes (three half-lives),

so we'll substitute that value into our equation:N = N0 e–λt

N = 10 e–0.0006955 x 2988

N = 10 x 0.125

N = 1.25 kg

After 2988 minutes (three half-lives), 1.25 kilograms of nitrogen-13 will remain in the sample.

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To produce the sound of 60 dB in the concert hall, the number of oboes required is equal to 100, which means option B is the right answer.

Oboes is the musical instrument which is used to produce sound. It is made up of exotic wood. The sound produced by the oboes has a pitch which is steadier than strings, so it's a more reliable tuning source.

To calculate the number of oboes required to produce 60 dB sound, we first calculate the difference in the sound intensity. Since initial sound intensity is equal to 50 dB and the increased sound intensity is equal to 60 dB, therefore difference is 10 dB.

Applying the formula N2/N1 = 10^(ΔL/10) to determine the number of oboes required, we get following:

N1 = number of oboes producing a sound intensity of 50 dB

N2 = number of oboes needed to produce a sound intensity of 60 dB

ΔL = difference in sound intensity = 60-50 = 10 dB

∵ N2/N1 = 10^(10/10) = 10

Since, N1 = 10 oboes

∴ N2 = N1 × 10 = 10 × 10 = 100

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Answer:

Eukarya

Explanation:

Only organisms of domain eukarya have an organized nucleus

The amount of dots corresponds to the atom's number of valence electrons. With no more than two dots on a side, these dots are positioned above, below, and to the right and left of the symbol.

Step 1: Finding the total amount of valence electrons is the first step. Step 2: Outline the molecule's skeletal structure. Step 3: Form each bond in the skeletal structure using two valence electrons.

Four bonds are created by the four valence electrons that make up carbon. As a result, carbon has four dots surrounding it.

Lewis structures are diagrams that show the valence electrons of atoms within a molecule. They are often referred to as Lewis dot structures or electron dot structures. The valence electrons of atoms and molecules, whether they reside as lone pairs or within bonds, can be seen using these Lewis symbols and structures.

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Answer:

c)both

Explanation:

The laws of reflection hold true for all the reflecting surfaces either spherical or plane. Therefore, the plane mirror, concave mirror and the convex mirror all will follow the laws of reflection.

Answer:

It holds for only plane mirrors

It states that the angle of incidence is equal to the angle of reflection.

This is only possible in plane mirrors only

The lighter block will also accelerate to the right with an acceleration of -0.82 m/s².

(a) μ = 0

The heavier block will accelerate to the right with an acceleration of:

a = F / m = k x / m = (3.70 N/m) (0.0864 m) / 0.261 kg = 1.22 m/s²

The lighter block will also accelerate to the right with an acceleration of 1.22 m/s².

(b) μ = 0.110

The heavier block will accelerate to the right with an acceleration of:

a = F - μk / m = k x / m - μk / m = (3.70 N/m) (0.0864 m) / 0.261 kg - (0.110)(0.261 kg)(9.80 m/s²) = 0.68 m/s²

The lighter block will not accelerate because the force of friction is greater than the force of the spring.

(c) μ = 0.480

The heavier block will accelerate to the right with an acceleration of:

a = F - μk / m = k x / m - μk / m = (3.70 N/m)(0.0864 m) / 0.261 kg - (0.480)(0.261 kg) (9.80 m/s²) = -0.82 m/s²

Therefore, the lighter block will also accelerate to the right with an acceleration of -0.82 m/s².

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Answer:

Q. Describe the image.
Ans. The object is between the focal point and the optical centre. Hence, the image does not converge to form a real image but rather diverges to form a virtual image. It lies on the same side as the object. The Image is enlarged and upright with its arrowhead pointing up.

Q. Give a real-life example of the use of the lens shown on the diagram.

Ans. Magnification glass, Camera lens.

Answer:

If the car comes to a sudden stop, your body tends to keep moving forward.

Explanation: