Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. (Figure 1) The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is uniform, 5.00 meters long, and has weight wb . The professor stands 2.00 meters from the pivot point and has weight wp .
Find the tension T in the rope in terms of the professor's weight wp and the weight of the beam wb .

Answer:

Asteroid 1 has more mass than asteroid 2

Explanation:

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thenoobygamerpro

01/25/2020

Physics

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Asteroid 1 moving 8km/s right asteroid 2 moving 16 km/s left before the crash. After the crash asteroid 1 is moving 4 km/s left and changed speed bu 12km/s. Asteroid 2 moving 2km/s left and changed speed by 14km/s

Two asteroids crashed. The crashed caused both asteroids to change speed. Scientist want to use the change in speed and motion to figure out which asteroid has more mass. Based on the information in the diagram. which statement is correct? In your answer explain what the forces were like and why the asteroids changed motions

Asteroid 1 has more mass than asteroid 2

Asteroid 1 and asteroid 2 are the same mass

Or asteroid 1 has lees mass than asteroid 2

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Answer: Asteroid 1 has more mass than asteroid 2

Explanation:

We can use the conservation of momentum law to find the answer. So, according to this law:

"If two objects or bodies are in a closed system and both collide, the total momentum of these two objects before the collision will be the same as the total momentum of these same two objects after the collision".

This means the momentum before the collision or crash () is equal to the momentum after the collision ():

(1)

Before the crash:

(2)

Where:

is the mass of the first asteroid

is the velocity of the first asteroid

is the mass of the second asteroid

is the velocity of the second asteroid

(3)

After the crash:

(4)

Where:

is the final velocity of the first asteroid

is the final velocity of the second asteroid

(5)

Substituting (3) and (5) in (1):

(6)

Grouping similar terms:

(7)

Then:

(8) This means  must be multiplied by 1.16 km/s in order to make this side of the equation equal to .

Answer:

Circle

Explanation:

Actually its Eclipse or ecliptial path.

Force varies inversely with square of distance.

Remember Gravitation?

Yes

F is inversely proportional to r²

So it's eclipse

Recheck if a option given or circle is most likely correct

The red wave has a greater amplitude because its height is greater than the height of the blue wave. Both waves have the same wavelength because the distance between crests is the same(A&B).

The amplitude of a wave refers to the maximum displacement or height of the wave from its rest position. Comparing the red and blue waves, it is mentioned that the height of the red wave is greater than the height of the blue wave. Therefore, the red wave has a greater amplitude.

The wavelength of a wave refers to the distance between two consecutive points that are in phase, such as two adjacent crests or troughs. The statement mentions that both waves have the same distance between their crests. Therefore, the red and blue waves have the same wavelength.

To summarize, the red wave has a greater amplitude because its height is greater, while both waves have the same wavelength because the distance between their crests is the same(A&B).

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The kinetic energy of the toy car is 0.50 Joules.

Given the following data:

To find the kinetic energy of the toy car:

Kinetic energy is an energy that is possessed by a physical object or body due to its motion.

Mathematically, kinetic energy is calculated by using the formula;

\(K.E = \frac{1}{2} MV^2\)

Where:

Substituting the given parameters into the formula, we have;

\(K.E = \frac{1}{2} \times 0.25 \times 2^2\\\\K.E = \frac{1}{2} \times 0.25 \times 4\\\\K.E =0.25 \times 2\)

K.E = 0.50 Joules

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The temperature of sweat when it is first produced is two degree more than normal temperature of the body because sweat removes extra heat from the body.

Our body begins to sweat when our body temperature goes up more than two degrees from normal which is 102 degree F. When you sweat, your body temperature drops back to the safe range which is 96.6 to 100.6 degrees F.

So we can conclude that The temperature of sweat when it is first produced is two degree more than normal temperature of the body because sweat removes extra heat from the body.

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Answer:

f = 14.28 m

Explanation:

Given that,

Object distance, u = -50 m

The image distance from the lens, v = +20 m

We need to find the focal length of the lens. Let the focal length is f. Using the lens formula,

\(\dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}\)

Put all the values,

\(\dfrac{1}{20}-\dfrac{1}{(-50)}=\dfrac{1}{f}\\\\f=14.28\ m\)

So, the focal length of the lens is equal to 14.28 m.

Answer:

Explanation:

A - 4.5

Answer: It takes the moon 27.3 days to complete one revolution around the earth.

Explanation:

(i) The force that acts on the moon is the gravitational force between the moon and the earth, given by the equation F = G * (m1 * m2) / r^2, where G is the gravitational constant, m1 and m2 are the masses of the earth and the moon, respectively, and r is the distance between the two objects. According to Newton's third law of motion, for every action there is an equal and opposite reaction. In this case, the earth pulls the moon towards it with the gravitational force, and the moon exerts an equal and opposite force on the earth.

(ii) To find the time for one complete revolution of the moon about the earth, we can use the equation T = 2π * √(r^3 / (G * M)), where T is the period of revolution, r is the radius of the orbit, G is the gravitational constant, and M is the mass of the earth. Plugging in the given values, we get:

T = 2π * √(400,000 km^3 / (G * M))

T = 2π * √(400,000,000,000 m^3 / (6.67 × 10^-11 Nm^2/kg^2 * 5.97 × 10^24 kg))

T = 2π * √(67,000,000,000,000 s^2)

T = 27.3 days

So, it takes the moon 27.3 days to complete one revolution around the earth.

The surface tension of the liquid is 24.1 g/m.

To calculate the surface tension of the liquid, we can use the formula:

surface tension = (extra force required) / (length of the film)

extra force required = 3.03 g

internal radius = 3 cm = 0.03 m

external radius = 3.2 cm = 0.032 m

The length of the film can be calculated as the circumference of the external ring minus the circumference of the internal ring:

length of the film = (2 * pi * external radius) - (2 * pi * internal radius)

= (2 * pi * 0.032 m) - (2 * pi * 0.03 m)

= 0.1257 m

So, the surface tension can be calculated as:

surface tension = (3.03 g) / (0.1257 m)

= 24.1 g/m

The surface tension of the liquid is 24.1 g/m.

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Given data:

* The mass of the cannonball is m_1 = 49 kg.

* The initial velocity of the cannonball is u_1 = 0 m/s.

* The final velocity of the cannonball is v_1 = 134 m/s.

* The mass of the boat and pirate is m_2 = 356 kg.

* The initial velocity of the boat and pirate is u_2 = 0 m/s.

Solution:

According to the law of conservation of momentum, the net momentum of the system in the initial state is equal to the net momentum of the system in the final state.

Thus,

Substituting the known values,

By simplifying,

Here, the negative sign indicates the motion of the boat and pirate is opposite to the direction of the cannonball.

Thus, the velocity of the boat and pirate after the cannonball fired is -18.44 meters per second.

Sound travels with a speed of about 330m/s. The wavelength of sound whose frequency is 660 Hz is A. 0.5m

The following terms should be used in the answer: frequency, sound, wavelength, and speed. The given question is asking us to calculate the wavelength of sound that has a frequency of 660 Hz when sound travels with a speed of about 330m/s. Sound is a type of mechanical wave that requires a medium to travel through, and it propagates through a medium by a series of compressions and rarefactions.

Sound waves have three important characteristics, namely frequency, wavelength, and amplitude. The frequency of a sound wave is the number of oscillations or cycles per second. The wavelength is the distance between two adjacent points in the same phase, such as the distance between two adjacent compressions or rarefactions. The amplitude is the maximum displacement of the wave from its equilibrium position.

Now, let's find the wavelength of sound whose frequency is 660 Hz given that the speed of sound is 330m/s.

We know that the speed of sound is given by the product of frequency and wavelength, which is given by the formula v = fλ.

Rearranging this equation to solve for the wavelength gives us λ = v/f.

Substituting the values of v = 330m/s and f = 660 Hz in the formula,

we getλ = 330/660λ = 0.5 m

Therefore, the wavelength of sound whose frequency is 660 Hz when sound travels with a speed of about 330m/s is A. 0.5 m.

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Approximately 4.375 × 10^13 electrons are transferred to the charge generator during the process of building a negative static charge of -7 micro-coulombs.

To determine the number of electrons transferred to the charge generator, we need to calculate the ratio between the negative static charge (-7 μC) and the charge of a single electron (e = 1.60 × 10^(-19) C).

Let's start by finding the number of electrons transferred:

Number of electrons transferred = (Negative static charge) / (Charge of a single electron)

Plugging in the values:

Number of electrons transferred = (-7 μC) / (1.60 × 10^(-19) C)

To simplify the calculation, we need to convert the negative static charge to coulombs:

Negative static charge = -7 μC = -7 × 10^(-6) C

Now we can substitute the values and perform the calculation:

Number of electrons transferred = (-7 × 10^(-6) C) / (1.60 × 10^(-19) C)

Dividing the two values, we get:

Number of electrons transferred ≈ 4.375 × 10^13 electrons

Therefore, approximately 4.375 × 10^13 electrons are transferred to the charge generator during the process of building a negative static charge of -7 micro-coulombs.

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Answer:

Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. ... Newton's third law is useful for figuring out which forces are external to a system.

Explanation:

is these what you're looking for?

Answer:

v = 2.5 mi/h

Explanation:

The velocity of an object is defined as the time rate of change of its position. In other words the velocity of an object is just a ration of displacement covered by the object to the time taken by the object, to cover that distance. So, in this case we will use the same formula or equation to calculate the velocity of the man. The formula is as follows:

v = s/t

where,

v = velocity of the man = ?

s = distance of the trail = 5 miles

t = time required to complete the trail = 2 h

Therefore,

v = 5 miles/ 2 h

v = 2.5 mi/h

The correct answer is B. According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

In simpler terms, as objects get closer together, the gravitational force between them increases.

When the distance between two objects decreases, the denominator of the equation (distance squared) becomes smaller, resulting in a larger force. Conversely, when the distance increases, the denominator becomes larger, resulting in a smaller force.

It is important to note that the mass of an object does not directly affect the strength of the gravitational force between two objects. However, a higher mass will lead to a greater gravitational force when compared to a lower mass, but only because the force is being exerted on a more massive object. The mass of an individual object doesn't directly affect the gravitational force it experiences from another object. option B

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The refractive index of the material is 0.

When the ray is incident on a transparent surface at an angle of 360 and the angle of refraction within the material is 27°, the refractive index of the material can be determined. The formula for Snell’s law is used to calculate refractive index. It states that: `sin i / sin r = n where i is the angle of incidence, r is the angle of refraction and n is the refractive index`.Snell’s law can be re-arranged to make n the subject of the formula to be: `n = sin i / sin r`Hence, we can calculate the refractive index as follows:

For the incident ray, i = 360° and the angle of refraction within the material, r = 27°.n = sin i / sin r= sin 360°/ sin 27°= 0/1 (since sin 360° = 0)= 0Therefore, the refractive index of the material is 0. T

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Answer: goin at a constant rate

Explanation: goes through 0,0

Answer: This is definitely false... you have to.. have séx with someone who has H.I.V to actually get H.I.V

When an acrylic rod is rubbed with wool or fur and then held near newly made T and B tapes on a wooden dowel, similar interactions and behaviors can be observed.

Both the rod and the tapes exhibit electrostatic phenomena such as attraction or repulsion. However, there may be differences in the strength of the interactions and the specific behavior observed.

Rubbing the acrylic rod with wool or fur causes a transfer of electrons, resulting in a buildup of static charge on the rod. The rod becomes negatively charged, while the wool or fur gains a positive charge. When the charged rod is brought near the T and B tapes on the wooden dowel, electrostatic interactions occur.

Similarities can be observed in the interactions between the rod and the tapes. Both the rod and the tapes can attract or repel each other based on their charges. For example, if the rod is negatively acrylic rod charged, it may attract the positively charged tape (B tape) and repel the negatively charged tape (T tape).

Overall, the interactions between the rod and the tapes demonstrate electrostatic phenomena, but the specific characteristics of the interactions may vary based on the charges and materials involved.

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The complete question is

Obtain an acrylic rod and a piece of wool or fur. Rub the rod with the wool, and then hold the rod near newly made T and B tapes on the wooden dowel. Compare the interactions of the rod with the tapes to the interactions between the tapes in part C. Describe any similarities or differences. We say that the rod and tapes are electrically charged when they interact as you have observed.

Explanation:

moment is an expression involving the product of a distance and physical quantities.

-the size of force applied.

-the perpendicular distance from the pivot to the line of action of the force

Answer:

Explanatin

its not 50 points it's 25!

Answer:

it is still 25 points

Explanation:

Answer:

a. 24 kg m/s

b.  3/5s

Explanation:

a.impulse is the change in momentum so at first the momentum is zero because the ball was at rest and the final momentum is 1.2kg*20m/s=24 kg m/s

so the impulse would be (24-0) kg m/s=24 kg m/s

b. so the impulse equation is impulse is force *delts time

so 24 kg m/s=40N*t

t=24 kg m/s /40N=3/5 s

Fill in the blanks:

1. Amplitude and distance

2. Medium

3. Attract

4. Insulator

True or false:

1. False

2. True

3. True

4. True

Match the following:

A matches 4, B matches 3 , C matches 2 and D matches 1.

Please mark as brainalist answer ......;-;

Given:

The initial height of the ball, h=1.6 m

The initial speed of the ball, u=14 m/s

To find:

a) The time of flight of the ball.

b) The range of the ball.

Explanation:

As the ball is thrown horizontally, the ball will have no vertical component of the initial velocity. The velocity of the ball is completely horizontal.

Thus the vertical component of the initial velocity of the ball is u_y=0 m/s.

The horizontal component of the initial velocity of the ball is u_x=u=14 m/s.

a)

From the equation of motion,

Where g is the acceleration due to gravity and t is the time of flight of the ball.

On substituting the known values,

b)

The range of the ball is given by,

On substituting the known values,

Final answer:

a) The time of flight of the ball is 0.57 s

b) The range of the ball is 7.98 m

The intensity of the transmitted light is approximately 96.6 W/m².

The intensity of the transmitted light can be found using Malus's Law which states that the intensity of the transmitted light is equal to the incident intensity multiplied by the square of the cosine of the angle between the transmission axis and the polarization direction of the incident light.

Given that the incident light is vertically polarized and has an intensity of 100 W/m2, and the transmission axis of the polarizer is at an angle of 15 degrees with the vertical, we can calculate the intensity of the transmitted light as follows:

cos^2(15) = 0.966

Transmitted intensity = 100 x 0.966 = 96.6 W/m2

Therefore, the intensity of the transmitted light is 96.6 W/m2.

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Answer:

96.04Pa

Explanation:

height=3.5m

gravity=9.8%

density=9.8/3.5

=2.8

Preassure=h×g×d

=3.5×9.8×2.8

=96.04Pa

Answer:

A quality of matter that is unrelated to a change in its chemical makeup is called a physical property.

Examples of physical properties of matter:

Physical properties are any qualities of matter that may be felt or seen without changing the sample's chemical composition.

Due to the wide range of features that make up physical attributes, they are further separated into intensive and extensive as well as isotropic and anisotropic categories.

Any characteristic that can be recognized and measured by sight, hearing, touch, smell, or other senses without evoking a chemical reaction is referred to as a physical property. Examples of physical traits are:

Color, Shape, Volume, Density, Calorific value, Boiling point, Viscosity, Pressure, Solubility, electrical current

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Answer:

b. momentum, mass

Explanation:

If you increase the mass of an object, the momentum of the object increases proportionally

Answer:

B is correct.

Explanation:

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Approximately 0.715 amperes of current will flow in the given circuit with an inductance of 0.65 henry and a 277 -volt, 60 Hz power line.

Inductance is a fundamental property of an electrical circuit component that describes its ability to store energy in a magnetic field when an electric current flows through it. It is symbolized by the letter "L" and is measured in henries (H).

The current flowing in the circuit can be calculated using the formula:
I = V / ωL
where I is the current, V is the voltage, ω is the angular frequency, and L is the inductance.
Given that the inductance of the inductor is 0.65 henry and the voltage of the power line is 277 volts, we need to find the angular frequency.
The angular frequency (ω) can be calculated using the formula:
ω = 2πf
where f is the frequency. In this case, the frequency is given as 60 Hz.
Substituting the values into the formula, we have:
ω = 2π * 60 = 120π rad/s
Now, we can calculate the current:
I = 277 / (120π * 0.65)
Simplifying the expression, we get:
I ≈ 0.715 amperes
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