Momentum is known as “mass in motion ” and is related to how much ____________ is required to ____________ an object’s __________
i really need this thanks

Answer: (1a) The magnitude of the centripetal acceleration is 31.4 m/s^2, and the direction is towards the center of the circular motion.

(2a) The astronaut is experiencing 31.4 m/s^2 / 9.8 m/s^2 = 3.22 g's.

(3a) The torque needed to bring the centrifuge to a stop is (5500.0 kg * 31.4 m/s^2 * 20.0 m) = 3,420,000 N * m.

2:

(2a) The period of the pendulum's motion is 0.20 m / 0.10 m/s = 2.0 seconds, and the frequency is 1 / 2.0 s = 0.50 Hz.

(2b) The graphs of velocity and acceleration would be 0.5 seconds out of phase with the displacements shown.

(2c) The acceleration due to gravity on the surface of the planet is 0.10 m/s^2 / 9.8 m/s^2 = 1.02 g's.

Explanation:

The pressure will 14. 0 g of co exert in a 3. 5 l container at 75°c is 4.1atm.

Therefore, option A is correct option.

Given,

Mass m = 14g

Volume= 3.5L

Temperature T= 75+273 = 348 K

Molar mass of CO = 28g/mol

Universal gas constant R= 0.082057L

Number of moles in 14 g of CO is

n= mass/ molar mass

= 14/28

= 0.5 mol

As we know that

PV= nRT

P × 3.5 = 0.5 × 0.082057 × 348

P × 3.5 = 14.277

P = 14.277/3.5

P = 4.0794 atm

P = 4.1 atm.

Thus we concluded that the pressure will 14. 0 g of co exert in a 3. 5 l container at 75°c is 4.1atm.

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The inside plate temperature is approximately 235.7°C.

The net heat transfer from the plate surface to the surrounding air can be calculated using the equation:

\(Q_n_e_t\) = \(Q_r_a_d_i_a_t_i_o_n\) - \(Q_c_o_n_v_e_c_t_i_o_n\)

where \(Q_r_a_d_i_a_t_i_o_n\) = σ(ε)(A)(T⁴) is the heat lost from the plate surface by radiation, \(Q_c_o_n_v_e_c_t_i_o_n\) = h(A)(\(T_p_l_a_t_e\) - \(T_a_i_r\)) is the heat transferred from the plate surface to the air by convection, σ is the Stefan-Boltzmann constant, ε is the emissivity of the plate, A is the surface area of the plate, T is the temperature of the plate in Kelvin, \(T_a_i_r\) is the temperature of the air, \(T_p_l_a_t_e\) is the inside plate temperature, and h is the convective heat transfer coefficient.

By rearranging the equation and solving for \(T_p_l_a_t_e\), we get:

\(T_p_l_a_t_e\) = [(\(Q_r_a_d_i_a_t_i_o_n\) - h(A)(\(T_p_l_a_t_e\) - \(T_a_i_r\)))/σ(ε)(A)\(]^(^1^/^4^)\)

Substituting the given values, we get:

\(T_p_l_a_t_e\) = [(300 - 25(0.5*0.75)(\(T_p_l_a_t_e\) - 20))/ (5.67 x \(10^-^8\) x 0.4 x 0.375)\(]^(^1^/^4^)\)

Solving for \(T_p_l_a_t_e\), we get:

\(T_p_l_a_t_e\) = 508.85 K = 235.7°C

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The rotational inertia of the rod with a mass of the rod is 1.6 grams and the length of the rod is 2m is 0.0533×10⁻⁶ kg/m².

From the given,

the rotational inertial of rod I,

I = I₁+I₂+I₃

mass of the one rod = 1.6 gram = 1.6×10⁻³kg

length of the rod = 2 cm = 0.02m

I = I₁+I₂+I₃

= (mL²/12)+(mL²/12)+0

= mL²/6

I =mL²/6

 = (1.6×10⁻³kg)×(0.02)²/6

 = (1.6×10⁻⁷)/3

 = 0.533 ×10⁻⁷

= 0.0533 ×10⁻⁶ kg/m²

Thus the rotational inertia of the rod is 0.0533×10⁻⁶ kg/m².

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Answer: lollllllllllllllllllllll

Explanation:

Answer:

b decreases as a increases and c stays constant

It all depends on the definitions of a, b, and c, and the relationship among them. Your question doesn't give us any of this information.

Answer:

he is right it’s D

Explanation:

if u could not read his hand writing

The fur of a sea otter is the densest of any animal, having the most hairs per square inch of any other species. Even while floating in the water, their thick fur keeps the animal warm and dry.

Sea otters decrease heat loss when the water is too cold by floating on their backs with their feet out of the water. To increase their surface area when trying to dissipate heat, sea otters spread their feet out underwater. Sea otters typically spread out or tuck their feet up to maintain body heat. The amount of food available to sea otters would decrease if prey species in their environment declined as a result of changing temperatures.

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Answer:

i think its A

Explanation:

Answer:

Earth's gravity is what keeps you on the ground and what makes things fall. Anything that has mass also has gravity. Objects with more mass have more gravity.

Explanation:

These dose levels represent varying concentrations or amounts of the same type of pesticide that is being used. the use of three dose levels with the same type of pesticide in this experiment allows for a comprehensive evaluation of how varying pesticide concentrations affect bug survival time, providing insights into the potential impact of pesticides on insect populations and ecosystems

The purpose of using multiple dose levels is to examine the potential relationship between pesticide dosage and bug survival time. By applying different doses, the researchers can observe if there is a dose-dependent effect, where higher doses result in shorter survival times or increased mortality rates among the bugs. This allows them to understand the potential toxicity or effectiveness of the pesticide at different concentrations.Using the same type of pesticide for all three dose levels ensures that the observed effects are solely attributed to the dose variations and not due to different chemical properties or compositions of the pesticides. This helps in establishing a direct comparison between the dose levels and their impact on bug survival time.By analyzing the survival times of bugs exposed to low, medium, and high doses of the pesticide, the researchers can gather data on the dose-response relationship. This information is valuable in assessing the potential risks and determining the optimal dosage for pest control purposes while minimizing adverse effects on non-target organisms. Overall, the use of three dose levels with the same type of pesticide in this experiment allows for a comprehensive evaluation of how varying pesticide concentrations affect bug survival time, providing insights into the potential impact of pesticides on insect populations and ecosystems.

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Answer:

the angle of reflection equals the angle of incidence—θr = θi. The angles are measured relative to the perpendicular to the surface at the point where the ray strikes the surface.

Explanation:

A microscope uses a mirror to reflect light to the specimen under the microscope. ... An astronomical reflecting telescope uses a large parabolic mirror to gather dim light from distant stars. A plane mirror is used to reflect the image to the eyepiece.

Answer:

Minerals to Gemstones

Mineral Name Gemstone Name

Beryl Aquamarine, Beryl, Bixbite, Emerald, Goshenite, Heliodore, Morganite

Brazilianite Brazilianite

Chalcedony Agate, Aventurine, Bloodstone, Carnelian, Chrysoprase, Heliotrope, Jasper, Onyx, Sard

Chrysoberyl Alexandrite, Chrysoberyl

Answer:

5  seconds

Explanation:

Rock A is thrown horizontally off a cliff with a velocity of 15 m/s. The rock lands 75m from the base of the cliff, According to the above information the time spend by the rock will be "5 s".

To find the time given values are:

Initial horizontal velocity, u = 15 m/s

Horizontal Length, R = 75 m

The range of a projectile can be defined as the distance horizontally that projectile which travels with the time and then it is launched for the time and also it comes back down to the same height to the height of where it is launched. According to a projectile motion, there will be no horizontal acceleration at work.

The range of projectile will be:

R=υt

t = R /υ

By substituting the values,

t = 75 /15

t = 5 sec

Rock A is thrown horizontally off a cliff with a velocity of 15 m/s. The rock lands 75m from the base of the cliff, According to the above information the time spend by the rock will be "5 s".

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Heat received by cold water equals heat lost by hot water. 60°C is the ultimate temperature.

An evaluation of an object or substance's warmth or coolness in relation to a reference value.

a measurement of how much heat is required to raise the temperature of a material by one degree Celsius for every gramme.

The unit of measurement for specific heat is Joules per gramme per degree Celsius (J/g °C).

Let c represent the water's specific heat.

based on the calorimetry concept.

Heat received by cold water equals heat lost by hot water.

200 * c * (80 - T) = 100 * c * (T - 20) (T - 20)

∴ 200c (80-T) = 100c(T-20) (T-20)

∴2 (80-T) = T - 20

∴160-2T=T-20

∴ 160+20 = T +2T

∴180 = 3T

∴T = 60 C.

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The magnitude of the frictional force between the sled and the snow is 46.3 N.

We are given that the pulling force has a horizontal component of 21 N and a vertical component in the upwards direction of 25 N. Using this information, we can calculate the magnitude of the pulling force as follows:

Magnitude of the pulling force = √((21 N)² + (25 N)²)

= √(441 N² + 625 N²)

= √(1066 N²)

= 32.7 N

To calculate the force of friction, we first need to calculate the net force. We can do this by finding the difference between the pulling force and the weight of the sled and child:

Net force = Magnitude of the pulling force - Weight of the sled and child

= 32.7 N - 79 N

= -46.3 N

Now, we know that this net force is equal to the force of friction:

Force of friction = Net force

= -46.3 N

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The magnetic field does not directly affect the velocity of the aluminum. When a piece of aluminum is dropped vertically downward between the poles of an electromagnet, the force of gravity is primarily responsible for its motion.

The magnetic field generated by the electromagnet exerts a force on the aluminum, but this force acts perpendicular to the direction of motion.

As a result, the magnetic force does not change the speed of the aluminum. However, it does cause the aluminum to experience a sideways deflection due to the interaction between the magnetic field and the induced currents in the aluminum. This phenomenon is known as magnetic induction or the Eddy current effect.

The deflection caused by the magnetic field depends on factors such as the strength of the magnetic field, the mass and shape of the aluminum, and the speed at which it is falling. The higher the strength of the magnetic field, the greater the deflection. Similarly, the larger the mass or shape of the aluminum, the smaller the deflection.

In summary, the magnetic field generated by the electromagnet does not directly affect the velocity of the aluminum, but it does cause a sideways deflection known as the Eddy current effect.

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Answer:

false

Explanation:

The statement "An orbiting satellite experiences no force due to the Earth's gravity." is a False statement. This is further explained below.

Generally, Gravity is simply defined as the force that pulls items toward the center of a planet or other entity.

In conclusion, an orbiting satellite experiences force due to the Earth's gravity.

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Answer:

its not B1 or A1. must be A2 or C2

Explanation:

Answer:

The difference in tension,  between adjacent sections of the pull cable at the given conditions is 17.701 kN

Explanation:

We take the cars as moving upwards such that the resultant pulling force on the car, F, along the cable is given by the relation

\(F_{car}\) = Upward tension force,  \(Tension_{(upwards)}\) - Downward tension force, \(Tension_{(downwards)}\) - Component of the weight of the car along the taut cable

The parameters given are;

Mass of car, m = 2750 kg

Angle of inclination of taut cables, θ = 35°

The upward acceleration of the car, a = 0.81 m/s²

Given that the weight is acting vertically downwards, we have;

Component of the weight of the car along the taut cable = m × g × sin(θ)

∴ Component of the weight of the car along the taut cable = 2750 × 9.81 × sin (35°) = 15473.66 N

We therefore have;

\(F_{car}\) =  \(Tension_{(upwards)}\) - \(Tension_{(downwards)}\) - 15473.66 N

\(F_{car}\)  = m × a = 2750 × 0.81 =  \(T_{upwards}\) - \(T_{downwards}\) - 15473.66

∴  \(Tension_{(upwards)}\) - \(Tension_{(downwards)}\) = 2750 × 0.81 + 15473.66 = 17701.16 N

Hence the difference in tension,  \(Tension_{(upwards)}\) - \(Tension_{(downwards)}\) between adjacent sections of the pull cable if the cars are at the maximum permissible mass and are being accelerated up the incline = 17701.16 N or 17.701 kN.

For a high-speed connection between two buildings, the type of wiring that should be used is fiber optic cable. Fiber optic cable is the most reliable and efficient way to transmit data over long distances at high speeds.

It uses light to transmit data instead of electrical signals, which means it is not affected by electromagnetic interference that can cause interruptions in transmission.
Fiber optic cable also has a much higher bandwidth than traditional copper wiring, which means it can handle more data at once. This is especially important for businesses that need to transfer large files or stream video across their network.
When installing fiber optic cable between two buildings, it is important to consider factors such as distance, the amount of data that will be transmitted, and the required level of security. A professional installer should be consulted to ensure that the cable is installed correctly and meets the specific needs of the business.
Overall, fiber optic cable is the best choice for a high-speed connection between two buildings due to its reliability, efficiency, and high bandwidth.

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The gravitational acceleration at the surface of the planet, times a function of r is g = mG/r².

Gravitational acceleration is described as an object receiving acceleration due to the gravitational force acting on it.

From Newton's second law of motion we can write

F=ma

Here, F is the force acting on the object.

m is its mass and

"a" is the acceleration.

Also according to Newton's law of gravity we can write,

Fg = GmM / (r+h)²

Also a = Fg/M

a = g = {GmM / (r+h)²} / M

g = Gm/r²

The gravitational acceleration at the surface of the planet, times a function of r is g = mG/r².

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Answer:

The answer is below

Explanation:

A 140 kg load is attached to a crane, which moves the load vertically. Calculate the tension in the

cable for the following cases:

a. The load moves downward at a constant velocity

b. The load accelerates downward at a rate 0.4 m/s??

C. The load accelerates upward at a rate 0.4 m/s??

Solution:

Acceleration due to gravity (g) = 10 m/s²

a) Given that the mass of the crane (m) is 140 kg. If the load moves downward, the tension (T) is given by:

mg - T = ma

Since the load has a constant velocity, hence acceleration (a) = 0. Therefore:

mg - T = m(0)

mg - T = 0

T = mg

T = 140(10) = 1400 N

T = 1400 N

b)  If the load moves downward, the tension (T) is given by:

mg - T = ma

T = mg - ma = m(g - a)

T = 140(10 - 0.4) = 140(9.96) = 134.4

T = 134.4 N

c)  If the load moves upward, the tension (T) is given by:

T - mg = ma

T = ma + mg = m(a + g)

T = 140(0.4 + 10) = 140(10.4)

T = 145.6 N

2) To find the distance (s) if the load move from rest (u= 0) and accelerates for 20 seconds (t = 20). We use:

s = ut + (1/2)gt²

s = 0(20) + (1/2)(10)(20)²

s = 2000 m

The maximum height reached by the brick above the ground is 20 ft. The time taken by the brick to reach the ground is 0 seconds. Free-fall motion (uniformly accelerated motion) after falling from a height of 20 feet. Further, the acceleration experienced by the free brick is equal to the acceleration due to gravity which is approximately 32ft/sec², downward.

Hence, we can write its acceleration as, a = g = 32ft/sec².

Here, u = 0 as the brick was not moving initially while it was at rest on the top of the load of bricks.

Now, the value of v(t) can be obtained by integrating the above expression w.r.t. time as shown below:v(t) = u + a.t = 0 + 32t = 32t ...(1)

The value of x(t) can be obtained by integrating the expression for v(t) w.r.t. time, i.e. t as shown below :x(t) = (1/2).a.t² + u.t + x₀ = (1/2).32t² + 0 + 20ft = 16t² + 20ft ...(2)

Here, x₀ = 20ft is the initial displacement of the brick above the ground.

Now, we can answer the questions as follows:

(a) Using  the following relation: v = u + a.t = 0 when the brick is at its highest point.

Hence, the time taken to reach this point can be obtained as follows:0 = u + a.t ⇒ t = (-u/a) = (0/32) sec = 0 secThis means that the brick reaches its maximum height at t = 0 sec, which is the initial moment.

Thus, the maximum height reached by the brick above the ground is, x(0) = 16.0² + 20 = 20 ft

(b) The time taken by the brick to reach the ground can be obtained by using the following relation: x(t) = 0.

Here, we are interested in finding the value of t.

Hence, we can substitute x(t) from equation (2) above and equate it to 0 to obtain the value of t as shown below:16t² + 20 = 0 ⇒ t² = -(20/16) sec².

This means that the brick doesn't take any finite time to reach the ground from its maximum height.

This is because it falls vertically downwards from a height of 20 ft under the action of gravity.

Thus, it reaches the ground at t = 0 sec only.

(c) The speed of the brick just before it hits the ground can be obtained by using the expression for v(t) from equation (1) above and substituting t = 0 sec (just before it hits the ground) as shown below:

v(0) = 32(0) = 0 ft/sec.

Hence, the speed of the brick just before it hits the ground is 0 ft/sec.

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Answer:

a.149 °F into °C

149 - 32 = 117

117 x 5 = 585

585 / 9 = 65

149 °F = 65 °C

b.149 °F into Kelvin

(149°F − 32) × 5/9 + 273.15 = 338.15K

For a laminar airflow over flat plates with a constant surface temperature, the curve that best represents how the average heat transfer coefficient declines with plate length increases.

In fluid dynamics, laminar flow is characterized by fluid particles passing each other in layers along straight paths with little to no mixing in between. When the fluid is traveling at moderate speeds, it tends to Laminar flow without lateral mixing, which causes adjacent layers to slip past one another like playing cards. The heat transfer coefficient measures the convective heat transfer between a fluid medium (a fluid) and the surface (a wall) it flows over. The Newton-Richmann relation shows the heat transfer coefficient as a proportionality factor.

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