help please i will mark brainlist!!!

The mass of the object is approximately 0.457 kg.

The mass of the object attached to the trolley can be calculated using the principle of conservation of momentum. Since the two trolleys couple together and move as a single system after the collision, the total momentum before and after the collision should be the same. Given the mass of one trolley is 0.80 kg and the initial speed is 1.1 m/s, the momentum before the collision is 0.80 kg * 1.1 m/s = 0.88 kg·m/s. After the collision, the total mass is the sum of the two trolleys, and the final speed is 0.70 m/s.

Using the momentum equation, the mass of the object can be calculated as follows:

Total momentum before collision = Total momentum after collision

0.88 kg·m/s = (0.80 kg + mass of the object) * 0.70 m/s

Solving for the mass of the object, we get:

0.88 kg·m/s = (0.80 kg + mass of the object) * 0.70 m/s

0.88 kg·m/s = 0.56 kg + 0.70 kg * mass of the object

0.88 kg·m/s - 0.56 kg = 0.70 kg * mass of the object

0.32 kg = 0.70 kg * mass of the object

Dividing both sides by 0.70 kg, we find:

mass of the object = 0.32 kg / 0.70 kg = 0.457 kg

The two trolleys collide and couple together, the total momentum before the collision is equal to the total momentum after the collision according to the principle of conservation of momentum.

The momentum of an object is defined as the product of its mass and velocity. In this case, the mass of one trolley is known (0.80 kg) and the initial speed is given (1.1 m/s), allowing us to calculate the momentum before the collision.

After the collision, the two trolleys move together at a new speed (0.70 m/s). By setting the initial momentum equal to the final momentum and solving for the unknown mass of the object, we can find its value.

In the calculation, we subtract the masses of the two trolleys from the total mass in order to isolate the mass of the object.

Dividing the difference in momentum by the product of the known mass and the new speed, we obtain the mass of the object. In this case, the mass of the object is approximately 0.457 kg.

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Inertia: tendency of an object to resist changes in its velocity. An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.

Answer:

A

Explanation:

Answer:

If it turns the paper blue it would have to be a base.

Explanation:

I hope that answers your question!

Answer:

If it turns the paper blue it would have to be a base.

Explanation:

I hope that answers your question!

(a) The swimmer needs 3000 seconds before take a bath across that whole river.

(b) D = 2730 meters, which represents how far downstream the swimmer will be when they cross the river.

Two miles downstream, in the course of or closer to the entrance of a stream drifting downstream. in or around the end of a typical industrial process and the stages after fabrication that increase earnings for downstream products.

Downstream It is referred to as downstream if somehow the boat is moving downwards of the stream. The downstream speed in this situation refers to the boat's net speed. In this situation, still water is seen as being immobile.

Time = ?

d / v = t

3000 m / 1.0 m/s

T = 3000 s

Distance = ?

t * v = d

3000 s * 0.91 m/s

D = 2730 m

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The density of water at STP, which is \(997 kg/m^3\), we can see that Saturn is less dense than water.

To determine whether Saturn is less dense than water, we must compute its density and compare it to the density of water at standard temperature and pressure (STP), which is \(997 kg/m^3\).

Saturn's density can be computed using the following formula:

density equals mass divided by volume

Saturn's mass and volume may be computed given its mass and radius.

The volume of Saturn can be determined using the sphere volume formula:

volume =\((4/3) \pi (r^3)\)

where r is Saturn's radius.

Filling in the blanks:

volume = \((4/3) \pi (5.6 \times 107) m^3\)

8.27 x 1023 \(m^3\)volume

Saturn's mass is given as \(5.68 \times 10^{26} kg.\)

We can now compute Saturn's density:

density equals mass divided by volume

density= \((5.68 x 10^{26 }kg\)) /\((8.27 \times 10^{23 }\)m³) a density of\(687 kg/m^3\)

This is due to the fact that Saturn is mostly made up of hydrogen and helium, which are far less dense than water. In reality, Saturn is the least dense planet in the Solar System, and it would float in a large enough body of water.

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The magnitude of the initial acceleration of the object is 4.2 m/s².

The tension in the string once the object starts moving is 13.65 N.

The magnitude of the initial acceleration of the object is calculated by applying Newton's second law of motion as follows;

F(net) = ma

m₂g - μm₁g cosθ = a(m₁ + m₂)

where;

(4.75 x 9.8) - (0.535 x 3.25 x 9.8 x cos40) = a(3.25 + 4.75)

33.5 = 8a

a = 33.5/8

a = 4.2 m/s²

The tension in the string once the object starts moving is calculated as;

T = m₁a

T = 3.25 x 4.2

T = 13.65 N

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Explanation:

Answer:

I current in a coil,,,,,,

Answer:D?

Explanation:

Sorry if i'm wrong....

Answer:

60 km/hr

Explanation:

Looking for km / hr

12 km / (.20 hr) =   60 km/hr

Answer:

Workdone = 113778 Joules

Explanation:

Given the following data;

Force = 903N

Distance = 126m

To find the workdone;

Workdone = force * distance

Substituting into the equation, we have

Workdone = 903 * 126

Workdone = 113778 Joules

Therefore, the amount of work, in joules, the gravity did on the asteroid is 113778.

The centripetal acceleration of the plane is 0.255 g.

What is centripetal acceleration?

centripetal acceleration is the rate at which a body moves through a circle. Due to the fact that velocity is a vector quantity (i.e., it has both a magnitude, the speed, and a direction), when a body travels in a circle, its direction is continually changing, which causes a change in velocity, which results in an acceleration. The circle's Centre is where the acceleration is pointed radially.

Since we are given the tension in the cable and the angle of inclination, we can use trigonometry to find the vertical and horizontal components of tension.

Tsinθ = mg

Tcosθ = mv²/r

where θ = 35°, v = 180 km/h = 50 m/s, r = 1000 m, and m = 1000 kg.

Solving for Tsinθ and Tcosθ, we get:

Tsinθ = mg = (1000 kg)(9.81 m/s²) = 9810 N

Tcosθ = mv²/r = (1000 kg)(50 m/s)²/(1000 m) = 2500 N

Now we can use the horizontal and vertical components of tension to find the centripetal acceleration:

Tcosθ = ma

a = Tcosθ/m = (2500 N)/(1000 kg) = 2.5 m/s²

To express this acceleration in terms of g, we divide by the acceleration due to gravity:

a/g = 2.5 m/s² / 9.81 m/s² = 0.255

Therefore, the centripetal acceleration of the plane is 0.255 g.

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Answer:

Heres on ex.

When the driver of a bus applies brake suddenly, the lower part of the body comes to rest as the bus comes to rest but, the upper part of the body continues to move forward due to inertia of motion.

Explanation:

Answer:

C)focusing on one goal at a time

Explanation:

Self-modification programs could be regarded as a program that help individual in managing unwanted as well as dysfunctional behavioral responses whenever they are going through a problem and try to deal with it. For instance the dysfunctional behavioral response for someone with a panic attack is avoidance. Some of the the steps that are involved in in a self-modification program are;

✓ specifying target behavior ✓designing a program

✓ gathering data about target behavior

Answer:

c

Explanation:

on edge 2020

Answer:

\(q = -461532.5 \ C\)

Explanation:

From the question we are told that

     The  electric filed is  \(E = 102 \ N/C\)  

Generally according to Gauss law

=>   \(E A = \frac{q}{\epsilon_o }\)

Given that  the electric field is pointing downward  , the equation become

    \(- E A = \frac{q}{\epsilon_o }\)

Here   \(q\) is the excess charge on the surface of the earth

          \(A\) is the surface  area of the of the earth which is mathematically represented as

     \(A = 4\pi r^2\)

Where r is the radius of the earth which has a value \(r = 6.3781*10^6 m\)

 substituting values

    \(A = 4 * 3.142 * (6.3781*10^6 \ m)^2\)

    \(A =5.1128 *10^{14} \ m^2\)

So

   \(q = -E * A * \epsilon _o\)

Here \(\epsilon_o\) s the permitivity of free space with value

          \(\epsilon_o = 8.85*10^{-12} \ m^{-3} \cdot kg^{-1}\cdot s^4 \cdot A^2\)

substituting values

     \(q = -102 * 5.1128 *10^{14} * 8.85 *10^{-12}\)

     \(q = -461532.5 \ C\)

Answer:

I believe the answer is that the light with the higher frequency refracts more than light with a lower frequency

Explanation:

Answer:Magnetic fields from two sources add up as vectors at each point, so the strength of the field is not necessarily the sum of the strengths1. Magnetic fields are vectors, which means they have direction as well as size. Therefore, the sum of two magnetic fields is not simply the sum of their magnitudes2.

Explanation:

Answer:

Explanation:

When the puck is sliding on the ice, there is no force being exerted on the puck to keep it moving forward. Instead, inertia keeps the puck moving forward. Friction between the puck and the ice gradually slows the puck down. You hit a hockey puck and it slides across the ice at nearly a constant speed

At constant speed and varying position of the hockey puck, implies a change in the velocity of the hockey puck and net force is acting on it to keep it in motion.

According to Newton's second law of motion, the force applied to a an object is directly proportional to the product of mass and acceleration of the object.

F = ma

Acceleration is the change in the velocity of an object per change in time of motion.

Thus, we can conclude that at constant speed and varying position of the hockey puck, implies a change in the velocity of the hockey puck and net force is acting on it to keep it in motion.

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Answer:

Frictional Force

Explanation:

i think so

According to the given statement:

I) acceleration a=2m/s²

ii) deceleration a=−1  m/s²

iii) the distance travelled =200  m.

Velocity's rate of change with time, in both terms of speed and direction. A point or object moving straight ahead is accelerated when it increases or decelerates. Even if the speed remains constant, motion on the a circle increases because the orientation is always shifting.

Briefing:

You use the standard formulas for distance as a function of speed, acceleration and time:

st = v0t + 0.10at²  for acceleration ( a >0) and deceleration ( a <0), or at constant speed ( a =0).

Now  a  is not given for acceleration and deceleration, so we need to compute this from

vt=v₀+at

Acceleration:  

20=10a⟹a=2m/s²

Distance travelled:  

0.10∗10∗10²=100  m

Distance travelled while at constant speed:

s=vt=20∗20=400  m

Deceleration:  

0=20+20a⟺a=−1  m/s²

Distance travelled:

20∗20+0.1(−1)20²=400−2∗100

=200  m.

So the total distance travelled is  100+400+200=700m

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Answer:

0.14c

0.003 s

Explanation:

See attachment

Answer: 0.390625 grams

Explanation:

A half-life of an element is the amount of time that it takes for half the mass of the element to decay.

Gold-198 having a half-life of 2.5 days therefore means that every 2.5 days, the mass is cut in half.

If there are 20 days, find out how many half-life periods there are:

= 20 / 2.5

= 8 periods

The half life is:

= Original mass * 0.5^number of half-life periods

= 100 * 0.5⁸

= 0.390625 grams

B. Formation of new stars

1) Berenice, Chadwick, and Edouard have poor vision (near-sightedness)

The near point, or the shortest distance at which an item can be seen well by a human eye, is 25cm.

The far point is the farthest distance at which an item may be viewed clearly with the bare eye.

Diverging lenses, which produce virtual pictures at the individual's far point when confronted with objects at infinity, can be used to treat nearsightedness.

2) Bernice and Edouard have a near point larger than 25cm and a far point less than infinity, resulting in nearsightedness and hyperopia.

Because of the reasons stated above, the folks listed will need bifocals to correct their vision.

Converging lenses, which produce virtual pictures at the patient's near point when shown with things at 25 cm, can cure farsightedness. To compensate for both farsightedness and nearsightedness, bifocals have both converging and diverging lenses.

3) The near point, or the shortest distance within which an item can be seen well by a human eye, is 25cm.

The far point is the farthest distance at which an item may be viewed clearly with the bare eye.

A hyperopic eye can see far away objects clearly, but its near point grows, thus it is higher than 25cm for that eye.

According to the table, Avishka and Francesca have farsightedness, hence their near point is more than 25cm, hence can be corrected using Converging lenses.

Nearsightedness often runs in families. Objects in the distance seem hazy. The illness can progress slowly or quickly. Treatment options include glasses, contact lenses, and LASIK surgery.

Nearsightedness is frequently caused by an eye that is excessively long or oval-shaped rather than spherical. It might also be caused by a too-steep corneal curvature. As a result of these alterations, light beams collide in front of the retina. The messages transferred from the retina to the brain are distorted.

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Answer:

Backyard burning of trash in a barrel, pile or outdoor boiler releases smoke into the air. ... Trash fires in burn barrels can smolder and as a result produce greater amounts of harmful chemicals in the smoke. Harmful chemicals can also be present in the ash.Explanation:

The statement that is true about the theory of plate tectonics and the theory of continental drift C. The theory of plate tectonics gives the method by which continents can move as part of plates .

According to the scientific hypothesis of plate tectonics, the underground movements of the Earth create the primary landforms. By explaining a wide range of phenomena, including as mountain-building events, volcanoes, and earthquakes, the theory, which became firmly established in the 1960s, revolutionized the earth sciences.

The scientist Alfred Wegener is most closely connected with the concept of continental drift. Wegener wrote a paper outlining his notion that the continents were "drifting" across the Earth, occasionally crashing through oceans and into one another, in the early 20th century.

According to tectonic theory, the Earth's surface is dynamic and can move up to 1-2 inches every year. The numerous tectonic plates constantly move and interact. The outer layer of the Earth is altered by this motion. The result is earthquakes, volcanoes, and mountains.

Therefore, option C is correct.

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Answer:

Ratio D/h of minimum viewing distance to screen height is 16.28

Explanation:

 Given the data in the question;

Rayleigh criterion sin\(\theta\) = 1.22 λ/D

D is diameter (5.12 mm) = 5.12 × 10⁻³

λ is wavelength ( 537 nm) = 537 × 10⁻⁹ m

so we substitute

sin\(\theta\) = 1.22 × 537 × 10⁻⁹ / 5.12 × 10⁻³

sin\(\theta\)  = 655.14 × 10⁻⁹ / 5.12 × 10⁻³

sin\(\theta\) = 0.000127957

\(\theta\) = sin⁻¹ ( 0.000127957 )

\(\theta\) = 0.007331°

now, tan\(\theta\) = y/D

y = h/480

so

tan\(\theta\) = h/480 / D

h/D = 480 × tan\(\theta\)

D/h = 1 / ( 480 × tan\(\theta\) )

we substitute in value of \(\theta\)

D/h = 1 / ( 480 × tan( 0.007331° ) )

D/h = 1 / ( 480 × 0.00012795 )

D/h = 1 / 0.061416

D/h = 16.28

Therefore, Ratio D/h of minimum viewing distance to screen height is 16.28