a car is traveling at 30 km per hour. a bug hits the windscreen and goes splat. which object experiences the greater force?

Answer:

Explanation:

The mass of the car can be found by using the formula

\(m = \frac{2k}{ {v}^{2} } \\ \)

From the question we have

\(m = \frac{2 \times 300000}{ {20}^{2} } = \frac{600000}{400} = \frac{6000}{4} \\ \)

We have the final answer as

Hope this helps you

Answer:

5 Oxygen , 3 Carbon dioxide and 3 water

Answer: the answer is 5

(a) To make a plot of the equipotential contours for three positive and three negative values for phi, we need to set phi equal to each value and plot the resulting curves. For positive values, we can use phi = 1, 2, 3, and for negative values, we can use phi = -1, -2, -3. The resulting curves are shown in the figure below.

(b) To find nabla^bar phi, we need to take the partial derivatives of phi with respect to x and y. Thus, nabla^bar phi = (3x^2 - 3y^2, -6xy).

(c) To show that the nabla^bar phi field lines are given by setting 3x^2 y - y^3 equal to a series of constants, we need to set the components of nabla^bar phi equal to some constants kx and ky, respectively. Solving for y in terms of x and using the result in the other equation, we get:

3x^2 (ky/kx) - (ky/kx)^3 = y^2
y = ±sqrt(3x^2 (ky/kx) - (ky/kx)^3)

Thus, the field lines are given by the above equation with different values of kx and ky.

(d) To plot six representative nabla^bar phi field lines, we can choose six different values of kx and ky and plot the resulting curves. The direction of the field is given by the direction of nabla^bar phi, which is shown by the arrows in the figure below. The magnitude of the field is proportional to the density of the field lines, with denser lines indicating stronger fields.

(e) To find nabla^bar middot nabla^bar phi, we need to take the divergence of nabla^bar phi. Thus, nabla^bar middot nabla^bar phi = 3x^2 - 6y^2. This agrees with the equation for the field lines we found in part (c), since the constants kx and ky correspond to different values of 3x^2 - y^3.

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a) The initial horizontal velocity is V = 10m/s  and the inital vertical velocity is ZERO as the angle is set at 0°, so no vertical component

b) The time of flight can be calculated using the height given

Equation of motion,  h = 0 +\(\frac{gt^2}{2}\)

h=\(\frac{9.8\cdot1.63\cdot1.63}{2}\)

h= 13.01 m

The time of flight can be calculated using the height given

t =\(\sqrt{(2\cdot13\div9.8}\) = 1.6288220358559 sec ≅ 1.63 sec

So  now :

the horizontal Range is

R = Vt = 10 × 1.6288220358559

=16.288220358559 ≅16.29 m

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Answer:

Hello, Yes i believe it would be a positive charge considering electrons have a negative charge while protons have a positive charge.

Explanation:

Answer:

A: The distance light travels in one year

This collision violates conservation of both energy and momentum i.e, third option is correct.

According to the law of conservation of momentum, when two bodies collide their total momentum and energy before and after collision are equal.

According to the law of conservation of energy, energy can neither be created nor destroyed. However, it can be transformed from one form to another. It is also known as the first law of thermodynamics.

Given that, the two bodies move with same velocities after collision, means that the law has not been violated since, momentum = mass*velocity (where mass is said to be constant)

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The fraction of light from the Sun intercepted and reflected by the Earth is approximately 4.26 x 10⁻⁵.

To calculate the fraction of light from the Sun intercepted and reflected by the Earth, we need to compare the cross-section of the Earth to the area of a sphere centered on the Sun with a radius equal to the radius of Earth's orbit.

The cross-section of the Earth can be calculated as the area of a circle with radius REarth, which is option (c) R Earth.

The area of a sphere centered on the Sun with a radius r is given by 4πr², where r is the radius of the Earth's orbit. Therefore, the area of the sphere centered on the Sun with a radius equal to the radius of Earth's orbit is 4π(149.6 x 10⁶ km)²= 2.83 x 10²³ m².

The ratio of the cross-section of the Earth to the area of the sphere is A1/A2 = πREarth² / 4πr² = (REarth/r)². Using the radius of Earth's orbit in meters, r = 149.6 x 10⁹ m, and the radius of Earth, REarth = 6,371 km = 6.371 x 10⁶ m, we get A1/A2 = (6.371 x 10⁶ m / 149.6 x 10⁹ m)² = 4.26 x 10⁻⁵.

Therefore, by calculating we can say that the fraction of light is approximately 4.26 x 10⁻⁵.

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answer

0.33m|s2

Explanation:

v= 3.3m|s

t=10s

\(a = v \t\)

=3.3÷10

=0.33m|s2

The sun is Yellow, red, orange, and blue. Therefore option B is correct.

The star is moving toward an observer. Therefore option B is correct.

39. The type of radioactive decay represented by the equation provided Gamma. Therefore option A is correct.

40. The statement is completed correctly by the information which states that the coal in Alberta has a lower carbon content than coal in other parts of Canada, resulting in reduced greenhouse gas emissions.

29. graph B depicts the relationship between gravitational field strength and the mass of the International Space Station orbiting Earth.

30. The correct sequence of colors representing the changing temperature from the surface to the atmosphere of the sun is Yellow, red, orange, and blue. Therefore option B is correct.

1. When a star undergoes a blue shift, it indicates that the star is moving toward an observer. Therefore option B is correct.

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0.29 m/s is the speed of this wave.

How can we determine a wave's speed?

Given: The wave's traveling wavelength is () = 35 cm

The wave's period (t) is 1.2 seconds.

The wave's frequency is 0.833 Hz.

We must ascertain a wave's wave speed.

Formula for wave speed is 35 x 0.833 (wavelength x frequency).

= 29.167 cm/sec

= 0.29 m/sec

As a result, the wave's speed is 0.29 m/s.

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Approximately 4.188 kg of water is used to cool the engine.

To determine the mass of water used to cool the engine, we need to use the specific heat capacity of water and the formula for heat transfer.

We can assume that the engine and water in it initially had a temperature of 35°C and cooled to 10°C. The temperature difference is ΔT = 35°C - 10°C = 25°C.

The formula for heat transfer is Q = mcΔT, where Q is the heat transferred, m is the mass of the substance, c is its specific heat capacity, and ΔT is the change in temperature.

We are given Q = 4.4x \(10^{6}\) J and the mass of the engine, so we need to find c for water.

The specific heat capacity of water is 4.18 J/g°C. We can rearrange the formula to solve for the mass of water: m = Q / cΔT. Plugging in the values, we get:

m = 4.4x \(10^{6}\) J / (4.18 J/g°C x 25°C) = 4188 g or 4.188 kg

Therefore, approximately 4.188 kg of water is used to cool the engine.

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Answer:

March 21 = Vernal Equinox

Artic = North Pole

December 21 = Winter Solstice

Meridians = Longitude

September 23 = Autumnal Equinox

Greenwich, England = Prime Meridian

Antarctic = South Pole

Marianas Trench = Lowest point on earth

Parallels = Latitude

International Date Line = 180th Meridian

Explanation:

By finding the specific heat, we can expect that the material of the block is copper or silver (or a mix).

We know that we give 13,500 joules of energy to the metal block (which we assume has a mass of 1kg) and the temperature increases from 15°C to 60°C.

Then the increase is:

60°C - 15°C = 45°C

Then this metal has a specific heat of:

H = 13,500j/(45°C*1 kg) = 300 J/°C*kg

So it could be copper, which has a specific heat of 380J/°C*kg or Silver, which has a specific heat of 240 J/°C*kg (or a mix of these two).

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Answer:

The answer is

Explanation:

The mass of an object given it's momentum and velocity / speed can be found by using the formula

\(m = \frac{p}{v} \\ \)

where

m is the mass

p is the momentum

v is the speed or velocity

From the question

p = 280 kg/ms

v = 10 m/s

The mass of the object is

\(m = \frac{280}{10} = 28 \\ \)

We have the final answer as

Hope this helps you

Throughout the race, sprinters must stay in their allotted lanes and are not permitted to cross them. They begin the 800-meter race in varying positions and have the opportunity to break ahead after the first curve.

Studies show that running at a moderate speed for just just few minutes each day can help reduce your risk of dying from common illnesses including strokes and heart attacks. The same study does, however, also demonstrate that these benefits cease to exist after four hours per week, undermining the necessity of regular long runs.

Between two and four runs per week, lasting around twenty to thirty minutes (or 2 to 4 miles each), are recommended for new runners. You may be familiar with the 10% Rule, but running more frequently every other week is a superior strategy for increasing your mileage. Your body will be assisted in adjusting to your.

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Answers:

Note: It's very likely the tile labeled "MAL" should be "NAL", and that "MATES" should be "NATES".

==================================

Explanations:

if two balls are launched from a height. One is horizontally and other is vertically downwards, then both of the balls will touch the ground exactly at the same time.

When a ball is launched from a height than at some angle then its velocity(v) can be considered as divided into two components: One is vertical and the other is horizontal.

v₁ = vcosθ (horizontal component)

v₂ = vsinθ (vertical component)

Vertical component is always subjected to the acceleration due to gravity. Which is same for every vertical motion. Since the dropping height is same for both the balls, so their travelling time in the vertical downward direction will also be same. So they will touch the ground exactly at the same time.

--The given question is incomplete, the complete question is

"A physical demo launches a ball horizontally while dropping a second ball vertically at exactly same time from same height. Which ball will touch the ground first?"--

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Given:

Diameter, D = 10.0 m

Distance, x = 7.38 x 10¹⁰ m

Wavelength, λ = 633 nm

Let's find how far apart the closest objects it could possibly resolve.

First, apply the formula for the angle for angle separation (limit of resolution):

Thus, we have:

Now, to find the distance of the closest objects, we have:

Thus, we have:

Therefore, the distance of the closest objects is 5699.28 meters.

• ANSWER:

5699.28 m

Answer:

the correct answer is C

Explanation:

a nucleus of atom is contain protons and electrons

ANSWER:

3) 1234 m

STEP-BY-STEP EXPLANATION:

Precision refers to how close two measurements are to one another. The highest number with a significant digit is the most precise, the number that has the most significant figures. Therefore, the less accurate is the opposite.

Which means that in this case, the least precise number is 1234 m.

Answer:

The answer is 144kg to 3s.f

Explanation:

convert cm to m

48/100=0.48

V=L³

V=0.48³

V=0.110592m³

\(density = \frac{mass}{volume} \)

1300=m/0.110592

m=1300×0.110592

M=144Kg o 3s.f

Answer:

Current in the circuit(I) = 0.5 ampere

Explanation:

Given:

Number of resistors = 2 (10 ohm each)

Series of resistors

EMF = 10 volt

Find:

Current in the circuit(I)

Computation:

Total resistance in series = R1 + R2

Total resistance in series = 10 + 10

Total resistance in series = 20 ohm

Current in the circuit(I) = EMF / Total resistance in series

Current in the circuit(I) = 10 / 20

Current in the circuit(I) = 0.5 ampere

The frequency of the minute hand is 1/60 Hz. Given that the minute hand of a clock completes one revolution in one hour and there are 3,600 seconds in one hour.

To calculate the frequency of the minute hand: Frequency of the minute hand = No. of revolutions per secondFirstly, let us calculate the number of revolutions of the minute hand in one second.1 hour = 60 × 60 = 3600 secondsIn one hour, the minute hand completes 1 revolution. So, in 1 second, the minute hand completes 1/3600 of the revolution.Now, we can calculate the frequency of the minute hand.

Frequency of the minute hand = No. of revolutions per second Frequency of the minute hand = 1/3600 HzTo calculate the frequency of the minute hand, we can use the following steps: Step 1: Calculate the number of revolutions of the minute hand in one second.1 hour = 60 × 60 = 3600 seconds In one hour, the minute hand completes 1 revolution.

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The cable being run between the two wiring closets is most likely a fiber optic cable.

Fiber optic cables are used for high-speed data transmission over long distances. They consist of a core of optically transparent material, such as glass or plastic, surrounded by a cladding material that reflects light back into the core.

The core and cladding are protected by an outer jacket or sheath that provides physical protection and insulation. Fiber optic cables are preferred for long-distance communication because they are less susceptible to interference and signal degradation than copper cables.

They are also able to transmit data at much higher speeds and over longer distances without the need for signal repeaters.

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In summary, the observations about determining ages of rocks and fossils are based on scientific principles such as radioactive decay, superposition, and original horizontality.

A scientific principle is a fundamental concept or law that explains how the natural world works. It is a statement based on empirical evidence and repeated observations that is widely accepted by the scientific community as a fundamental truth. Scientific principles provide a framework for understanding and explaining natural phenomena, and they form the basis for scientific research and discovery.

Examples of scientific principles include:

The law of conservation of energy, which states that energy cannot be created or destroyed, only transformed from one form to another.

The theory of evolution, which explains how species change over time through natural selection and genetic variation.

The law of gravity, which explains the attraction between objects with mass and their impact on space-time.

The principle of relativity, which explains how the laws of physics are the same for all observers in uniform motion relative to each other.

Scientific principles are subject to change and refinement as new evidence and discoveries are made, but they provide a reliable foundation for scientific inquiry and understanding.

Here,

1. Observations about determining ages of rocks and fossils:

Scientists use a variety of methods to determine the ages of rocks and fossils, such as radiometric dating, relative dating, and stratigraphy.

Radiometric dating involves measuring the decay of radioactive isotopes in rocks or fossils, which provides an estimate of the time elapsed since the material was last heated or exposed to sunlight.

Relative dating involves comparing the ages of rocks or fossils based on their position in relation to one another.

Stratigraphy involves studying the layers of rock or sedimentary deposits to determine the relative ages of the materials.

2. Explanation based on scientific principles:

Radiometric dating is based on the principle of radioactive decay, which is the spontaneous breakdown of atomic nuclei into smaller particles over time. The rate of decay is constant, which allows scientists to use the amount of remaining radioactive material to estimate the time elapsed since the material was last heated or exposed to sunlight.

Relative dating is based on the principle of superposition, which states that the oldest rocks or fossils are found at the bottom of a sequence, while the youngest rocks or fossils are found at the top. By comparing the ages of rocks or fossils in different layers, scientists can determine their relative ages.

Stratigraphy is based on the principle of original horizontality, which states that sedimentary layers are deposited in horizontal layers. By studying the layers of rock or sedimentary deposits, scientists can determine the relative ages of the materials based on their position.

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The color of light coming out of the flashlight through the glass in the blue sky activity is blue.

In the blue sky activity, when we direct the light of a flashlight through the glass, it helps in scattering the light from the flashlight. Since blue light has a shorter wavelength, it gets scattered more than the red light, which has a longer wavelength. When we look directly at the flashlight through the glass, we see that the color of light coming out is blue.The reason behind it is that the blue light is scattered more and it reaches our eyes from different directions. This is why the blue light dominates the other colors. Thus, when the flashlight's light passes through the glass, it undergoes refraction, and the scattered blue light dominates the other colors.

The color of light coming out of the flashlight through the glass in the blue sky activity is blue. The blue light is scattered more and it dominates the other colors.

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Answer

A) Time to reach zenith

t

=

2.2

2

=

1.1

s

v

=

u

+

a

t

∴

0

=

u

−

9.8

×

1.1

u

=

10.78

m/s

Explanation: