Calculate the centripetal force of a ball on a string in circular motion if the mass is 7 kg
traveling at 3 m/s and the radius of the string is 4 meters.
0 11 N
0 14 N
0 16 N
0 25 N

Answer:

Explanation:

potato :D

Answer:

A. Argon

Explanation:

It is a noble gas, a group which is not reactive.

Answer:

The change in momentum of the car is 3575 Kg.m/s

Explanation:

Impulse and Momentum

The impulse (J) experienced by the object equals the change in momentum of the object (Δp).

The formula that represents the above statement is:

J = Δp

The impulse is calculated as

J = F.t

Where F is the applied force and t is the time.

The car hits a wall with a force of F=6500 N and stops in 0.55 s. Thus, the impulse is:

J = 6500 * 0.55

J = 3575 Kg.m/s

The change in momentum of the car is:

[tex]\Delta p= J = 3575\ Kg.m/s[/tex]

The change in momentum of the car is 3575 Kg.m/s

By the force, the acceleration of robot is 1.5 m / s².

We need to know about force to solve this problem. Force will proportional to mass and acceleration. It can be written as

F = m . a

where F is force, m is mass and a is acceleration

From the question above, we know that

m = 0.2 kg

F = 0.3 N

By substituting the parameters, we know that

F = m . a

0.3 = 0.2 . a

a = 0.3 / 0.2

a = 3/2

a = 1.5 m / s²

Hence, the acceleration of robot is 1.5 m / s².

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The time(t) in the air for a horizontal projectile is dependent on  the distance travelled(d) and its initial velocity(v).

i.e. t = d/v

Since the time for the projectile in the air is same at both v and 2v, the distance at speed 2v will be double than that of the distance at speed v.

An object that is in motion in the air with no force other than gravity, then the path travelled by the object is called as projectile.

The driver must have landed to the distance 2d from the base of the cliff, when he dives with the speed 2v.

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The calculated acceleration is -2.5 m/s²

In accordance with the data in the question, we have:

Initial speed (u) is 9.5 m/s.

Final speed (v): 5.5 m/s

(s) = distance traveled (12 m).

Calculate the boat's acceleration, please. The third equation of motion yields v²=u²+ 2as, where v stands for final velocity.

u stands for beginning speed.

A stands for acceleration.

s stands for distance.

(5.5)²-(9.5)²= 2*a*12

30.25-90.25=24*a

-60=24*a

a=-2.5 m/s⁻²

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Answer:

3 m/s2

Explanation:

Took the test

Given that,

Weight of a car, W = 12,000 N

It is parked on a 36° slope.

To find,

The acceleration of the car.

Solution,

Let m be the mass of the car. Using formula for weight of an object.

W = mg

[tex]m=\dfrac{12000}{9.8}\\\\=1224.48\ kg[/tex]

Let a be the acceleration of the car. Using second law of motion as follows :

[tex]a=\dfrac{F_{\text{parallel}}}{m}\\\\=\dfrac{F\sin\theta}{m}\\\\=\dfrac{12000\times \sin(36)}{1224.48}\\\\=5.76\ m/s^2[/tex]

So, the acceleration of the car is [tex]5.76\ m/s^2[/tex].

Answer:

Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules. ... The element helium is a one-atom molecule.

Answer:

Explanation:

Answer:

the water spins the wheel wiche gives energy.

Explanation:

Answer:

[tex]\boxed {\boxed {\sf 299.568 \ Joules }}[/tex]

Explanation:

Kinetic energy can be found using the following formula:

[tex]E_k=\frac{1}{2}mv^2[/tex]

where m is the mass and v is the velocity.

The mass of the person is 60 kilograms and the velocity is 3.16 meters per second

[tex]m= 60 \ kg \\v= 3.16 \ m/s[/tex]

Substitute the values into the formula.

[tex]E_k=\frac{1}{2} (60 \ kg) *(3.16 \ m/s)^2[/tex]

First, evaluate the exponent.

[tex]E_k=\frac{1}{2}(60 \ kg ) (9.9856 \ m^2/s^2)[/tex]

Multiply 60 kg by 9.9856 m²/s²

[tex]E_k=\frac{1}{2} (599.136 \ kg*m^2/s^2)[/tex]

Multiply 599.136 kg*m²/s² by 1/2, or divide by 2.

[tex]E_k=299.568 \ kg*m^2/s^2[/tex]

[tex]E_k= 299.568 \ J[/tex]

The running person has a kinetic energy of 299.568 Joules.

Solution:

We know that, Kinetic energy(kE)= 1/2×m×v^2

By applying formula,we get

Or,KE=1/2×60×3.16^2

Or,kE=299.57j

So,her kinetic energy is 2999.5j

Answer:

A circuit breaker is a switching mechanism that interrupts the current that is irregular or fault. It is a mechanical system that interferes with high magnitude (fault) current flow and also performs a transfer operation. Hope this helps :)

Explanation:

Answer:

A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by an overcurrent or short circuit.

Explanation:

Its basic function is to interrupt current flow after protective relays detect a fault.

Answer: Each biome consists of many habitats whose ecosystems have adapted to the small differences in climate and the environment inside the biome.

1. Most Plant and Animal Species Are Found in the Rainforest Biome.

2. Rainforest Plants Help in the Fight Against Cancer

3. Not All Deserts Are Hot.

4. One-Third of the Earth's Stored Carbon Is Found in Arctic Tundra Soil.

Biome  is a regional or global land area that is characterized by the plants, animals and climate in that area.

Each biome consists of many __habits__ whose  _ecosystem_ have adapted to the small differences in climate and the environment inside the biome.

Based on temperature and rainfall there are six major biomes:

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Answer: hope this helps

wrote this last year

Explanation:

Why it is important to study the universe

There are many reasons why it is important to study the universe, such as we would know nothing about zodiac signs, planets, why and how the dinosaurs died.   The universe is an interesting place, and so much of it hasn't been explored. NASA (National aeronautics and space administration) is an agency that is responsible for development and  research of vehicles and activities in space.

The eight planets in your solar system are:

Jupiter~ named after Zeus the king of the gods.

Mars~ Named after the Roman god of war.

Uranus~ named after the Greek god of the sky ( Zeus. )

Mercury~ named after the Roman messenger god.

Venus~ named after the Roman goddess of love and beauty.

Saturn~ named after the Roman god of agriculture and wealth.

Earth~ is the only planet not named after anybody but its nickname is “the blue planet”

Now if we did not study the universe then how would we know all of that?  The universe is a BIG place and we are like Preons ( particles that are the building block to Quarks, Quarks are the particles in protons and neutrons ) compared to the universe.

Did you know that they have discovered an ocean on Jupiter? The ocean on Jupiter is 11 kilometer deep. It has also been discovered that it rains diamonds on Jupiter and Saturn.  One thing about the universe that is interesting to me is our moon, the moon comes in many colors such as:

Blue moon

Pink moon

Red moon

Yellow moon

Orange moon

There is also different types of solar eclipse:

Total eclipse~

Partial eclipse~

Annular eclipse~

The moon also has different phases as well:

Waning crescent

Third quarter

Waning gibbous

FULL MOON

Waxing gibbous

First quarter

Waxing crescent

Here is a fun fact about the moon, the moon is neither a star nor a planet, it is a satellite object. The first man on the moon was Neil Armstrong, and he was a part of Apollo 11, and Gemini 8. One of my favorite quotes from him is “ Mystery creates wonder and wonder is the basis of man’s desire to understand.”  Did you know that if you go to Death Valley, CA you can see the milky way from earth. One of the things I love about the universe is that it is full of mysteries. Lots of things we don't know about the earth and there are a lot of things we would not know if we didn't study the universe. Zodiac signs are the groups we put everyone in. These groups we are put in are deciphered by what month we are born in. The zodiac signs are what groups we are in according to the universe.

Answer:

Explanation:

How much force is required to accelerate an 8kg mass at 5m/s^2 if there is 14N of friction.

Answer:

54 N

Explanation:

By Newton's second law the force acting on an object is related to its mass and acceleration

F = m x a where
where m = mass of the object and a is the acceleration

Here m = 8 kg and a = 5m/s² so

F = 8 x 5 =40 Newtons (measure of force)

But there is an opposite force due to friction of 14 Newtons

So net force required to overcome this friction and accelerate the object of mass 8kg to 5m/s² = 40 + 14 = 54 Newtons

Answer:i don't understand

Explanation:

The acceleration of each ball while in motion is the acceleration due to gravity, that is 9.81 m/s²

Here one child simply drops a ball. The second child simultaneously launches a ball downward at a 10-meter-per-second initial speed.

In first case acceleration on the ball is the acceleration due to gravity, it should be noted that in the second case also acceleration on the ball is the acceleration due to gravity,

Therefore, only gravitational force is acting on both cases so their acceleration is the acceleration due to gravity. Therefore, the acceleration of each ball while in motion is the acceleration due to gravity, that is 9.81 m/s².

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The ocean wave velocity is 5m/s.

Wave speed commonly refers to velocity, but velocity actually means both speed and direction. A wave's velocity is equal to its wavelength times its frequency (the number of oscillations per second) and is independent of its intensity.

When a point in a rigid body oscillates, both transverse waves (waves in which the point oscillates transversely to the direction of travel) and longitudinal waves (waves in which the point oscillates in the same direction as the direction of travel) are emitted at the same frequency. Longitudinal waves are random, with longer wavelengths traveling faster. Seismic waves, therefore, consist of both longitudinal (P, primary) and transverse (S, secondary) waves and travel through the Earth at two velocities.

Wave velocity is related to wavelength and frequency by the following equations:

Velocity = wavelength x frequency

Using the above formula, we can easily calculate the ocean wave velocity as follows:

Velocity ​​= 50 x 0.1

Velocity = 5m/s

From the calculation above, we know that the ocean wave velocity is 5m/s.

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The minimum value resistance is 330 kΩ and maximum value resistance is 5000 kΩ.

Resistance is encountered by an electron as it passes through the external circuit's wires and loads. The obstacle to the flow of charge is called resistance. An electron cannot travel in a straight line from one terminal to the next. Instead, a zigzag path is created by several collisions with stationary atoms in the conducting substance. The movement of the electrons is hampered by resistance. Resistance prevents the passage of charge, whereas the electric potential difference between the two terminals promotes it. The combined influence of these two factors determines the rate at which charge flows from terminal to terminal.

Calculations:

θ = R * C

15s --- R = θ / C = 15 / 3x 10^-6 = 5x 10^6Ω----- 5000 kΩ

8s------R = 8 / 3x 10^-6 = 2.7x 10^6 Ω ----------------2700 kΩ

4s------R = 4 / 3x 10^-6 =  1.3x10^6 Ω -------------------1300kΩ

2s------R = 2 /3x 10^-6 = 0.67x 10^6 Ω ------------------670 kΩ

1s -----R = 1 / 3x10^-6 = 0.33x 10^6 Ω---------------------------330 kΩ

Part A

Answer : 330 kΩ ( min)

Part B

Answer: 5000 kΩ (max)

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Answer:

F = 0.667 N

Explanation:

Given that,

Masses of two objects, m₁ = m₂ = 1,000,000 kg

The distance between masses, d = 10 m

We need to find the force of gravity between two objects. The formula for the gravitational force is given by :

[tex]F=G\dfrac{m_1m_2}{d^2}\\\\F=6.67\times 10^{-11}\times \dfrac{(1,000,000)^2}{10^2}\\\\=0.667 N[/tex]

So, the force of gravity between two masses is 0.667 N.

The interrelationship between the environment and minerals can be that when we do mineral extraction we may harm the environment.

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The relation for the length of road at a given temperature, L at t°c = L0(1 + αΔT)

When a rod is heated from 0°c to a temperature t°c, its length increases which is given by the following formula

ΔL/L0 = αΔT

Where ΔL = change in length = L- L0

Thus,

L-L0/L0 = αΔT

⇒ L-L-L0 = L0(αΔT)

⇒ L = L0 + L0(αΔT)

Or L = L0(1 + αΔT)

Here L is the length at temperature  t°c

L0 is the length at 0°c

α = coefficient of thermal expansion

ΔT = change in temperature

Thus, the relation for the length of road at a given temperature, L at t°c = L0(1 + αΔT).

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The travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship is 4.5*10^6m/s.

To find the answer, we have to know about the Lorentz transformation.

It is given that, an alien spaceship traveling at 0.600 c toward the Earth, in the same direction the landing craft travels with a speed of 0.800 c relative to the mother ship. We have to find the time travel for the landing craft to reach the Earth as measured by the aliens on the mother ship.

                        [tex]t=\frac{d}{v}[/tex]

where; d is 0.2 light years, and the value of v will be 0.8c+0.6c

          [tex]t=\frac{0.2ly}{0.8c+06c} =\frac{0.2*9.46*10^{15}m}{1.4*3*10^8s} =4.5*10^6m/s[/tex]

Thus, we can conclude that, the travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship is 4.5*10^6m/s.

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Answer:

a = 10m/s^2

Explanation:

Recall that F=ma, therefore, to find acceleration, we need to rearange the equation in such a manner that it would equal acceleration:

[tex]F=ma\\\frac{F}{m} =a\\\\\frac{120N}{12kg}=a\\10m/s^2=a[/tex]

Answer: 2.2 x 10^21

Explanation:

The average acceleration of the car moving linearly is 6 m/s².

Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity.

a = Δv/Δt

where;

The average acceleration of the car moving linearly is calculated as follows;

a = 30 m/s / 5 s

a = 6 m/s²

Thus, the average acceleration of the car moving linearly is 6 m/s².

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The color filter that a person need to choose is option  (a) blue.

The reduction of   the wavelength of the light is one that tends to make the aperture to be bigger if it is said to be relative to the light wavelength, by rising  the resolving power. So, one need to  choose a blue filter.

The Blue light filter is one that can act by  lowering  the amount of blue light that is shown  on the screen of telescope device.

note that the blue light can tends to  suppress the creation of melatonin thus making it to  be filtering it out.

Therefore, based on the above, The color filter that a person need to choose is option  (a) blue.

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Answer:

kinetic energy

Explanation:

Answer:

The Moon actually takes 27.3 days to complete a single orbit around the earth. The Moon takes 29.5 days to complete one phase cycle.

Hope it helps!

Kelvin (K)

The kelvin (K) is the base unit for temperature of the SI. Kelvin is called the absolute temperature scale because it does not use degrees.