Willing to give out Brainliest: 3.00 m^3 of water is at 20.0°C If you raise its temperature to 60.0°C, by how much will its volume expand ?

Answer:

Approximately [tex]0.8\; \rm s[/tex] (assuming that air resistance is negligible.)

Explanation:

Let [tex]v_0[/tex] denote the initial velocity of this ball. Let [tex]\theta[/tex] denote the angle of elevation of that velocity.

The initial velocity of this ball could be decomposed into two parts:

If air resistance on this ball is negligible, [tex]v_0(\text{vertical})[/tex] alone would be sufficient for finding the time of flight of this ball.

Calculate [tex]v_0(\text{vertical})[/tex] given that [tex]v_0 = 8 \; \rm m \cdot s^{-1}[/tex] and [tex]\theta = 30^\circ[/tex]:

[tex]\begin{aligned}& v_0(\text{vertical}) \\ &= v_0 \cdot \sin(\theta) \\ &= \left(8 \; \rm m \cdot s^{-1} \right) \cdot \sin\left(30^{\circ}\right) \\ &= 4\;\rm m \cdot s^{-1} \end{aligned}[/tex].

Assume that air resistance on this ball is zero. Right before the ball hits the ground, the vertical velocity of this ball would be exactly the opposite of the value when the ball was launched.

Since [tex]v_0(\text{vertical}) = 4\; \rm m \cdot s^{-1}[/tex], the vertical velocity of this ball right before landing would be [tex]v_1(\text{vertical}) = -4\; \rm m \cdot s^{-1}[/tex].

Calculate the change to the vertical velocity of this ball:

[tex]\begin{aligned}& \Delta v(\text{vertical}) \\ & = v_1(\text{vertical}) - v_0(\text{vertical}) \\ &= -8\; \rm m \cdot s^{-1}\end{aligned}[/tex].

In other words, the vertical velocity of this ball should have change by [tex]8\; \rm m \cdot s^{-1}[/tex] during the entire flight (from the launch to the landing.)

The question states that the gravitational field strength on this ball is [tex]g = 10\; \rm m \cdot s^{-2}[/tex]. In other words, the (vertical) downward gravitational pull on this ball could change the vertical velocity of the ball by [tex]10\; \rm m\cdot s^{-1}[/tex] each second. What fraction of a second would it take to change the vertical velocity of this ball by [tex]8\; \rm m \cdot s^{-1}[/tex]?

[tex]\begin{aligned}t &= \frac{\Delta v(\text{initial})}{g} \\ &= \frac{8\; \rm m \cdot s^{-1}}{10\; \rm m \cdot s^{-2}} = 0.8\; \rm s\end{aligned}[/tex].

In other words, it would take [tex]0.8\; \rm s[/tex] to change the velocity of this ball from the initial velocity at launch to the final velocity at landing. Therefore, the time of the flight of this ball would be [tex]0.8\; \rm s\![/tex].

Answer:

Using the orbital velocity as deg/time  or the angular speed:

1 rev / sec = 2 * pi rad / sec   since there are 2 pi rad in a revolution

2 rad/sec = 1 / pi rev/sec  = f   from above

P = 1 / f = pi sec/rev = 3.14 sec/rev

Answer:

The answer is False

Explanation:

Hope this helps :)

Answer:

80 grams

Explanation:

multiplying 8 by 2.5 to get 20

so then deviding 200 by that 2.5 will get you 80 grams

This question involves the concepts of equlibrium and moment.

The mass of unknown object should be "500 g".

In order to balance the meter stick equilibrium should be achieved. For equilibrium the moment due to each mass must be the same.

[tex]F_1d_1=F_2d_2\\m_1gd_1=m_2gd_2\\m_1d_1=m_2d_2[/tex]

where,

Therefore,

[tex](200\ g)(20\ cm)=(m_2)(8\ cm)\\\\m_2=\frac{(200\ g)(20\ cm)}{8\ cm}[/tex]

m₂ = 500 g

Learn more about moment here:

https://brainly.com/question/6278006

Answer:

Up AND Down

Explanation:

a transverse wave goes up and Down

Answer:

i think yes, because the sand together with the filters catches all the impurities of the water that will pass through them. (btw sorry for my English, this is translated from my language in translator, so don't mind my English pls)

Answer:

[tex].[/tex]

Explanation:

sunspots are areas that appear dark on the sun's surface.They appear dark because they are colder that parts of the sun's surface. However, the temperature of a sunspot is still very high. This can cause a sudden burst of energy space. If a solar flare is very intense, the radiation it releases can interfere with our radio communication here on earth

Answer:

A. 131.9 s

B. 0.13 m/s

Explanation:

From the question given above, the following data were obtained:

Mass (m) = 490 Kg

Height (h) = 17 m

Power (P) = 0.83 hp

Time (t) =?

Velocity (v) =.?

Next, we shall convert 0.83 hp to Watts. This can be obtained as follow:

1 hp = 745.7 Watts

Therefore,

0.83 hp = 0.83 hp × 745.7 Watts / 1 hp

0.83 hp = 618.931 Watts

Thus, 0.83 hp is equivalent to 618.931 Watts.

A. Determination of the time.

Mass (m) = 490 Kg

Height (h) = 17 m

Power (P) = 618.931 Watts

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

Power = Energy / time

P = mgh / t

618.931 = 490 × 9.8 × 17 / t

618.931 = 81634 / t

Cross multiply

618.931 × t = 81634

Divide both side by 618.931

t = 81634 / 618.931

t = 131.9 s

Therefore, it will take 131.9 s to lift the beam.

B. Determination of the constant velocity.

We'll begin by calculating the force. This can be obtained as follow:

Mass (m) = 490 Kg

Acceleration due to gravity (g) = 9.8 m/s²

Force (F) =?

Force = mass × acceleration

Force = 490 × 9.8

Force = 4802 N

Finally, we shall determine the constant velocity as follow:

Force (F) = 4802 N

Power (P) = 618.931 Watts

Velocity (v) =?

P = F × v

618.931 = 4802 × v

Divide both side by 4802

v = 618.931 / 4802

v = 0.13 m/s

Thus, the constant speed at which the beam moves upward is 0.13 m/s

Answer:

b

Explanation:

Answer:

thermosphere...........

Answer:

Newton's third law of motion.

Explanation:

We are told the force needed to throw the full soda can was more than that needed to throw the empty can.

Now, the weight of the full soda can will be more than that of the empty can. Therefore, the full can will demand more force than that of the empty can due to Newton's third law of motion which states that to every action, there is an equal and opposite reaction.

Answer:

A

Explanation:

this is because the law of reflection states that the angle of incidence equals to the angle of the reflection.

hope this helps, if not please report it

someone else can try it

Answer:

Answer:

Acceleration

Explanation:

plato

Answer:

The World Series

Explanation:

The Super Bowl is the championship American Football game, and the World Cup is the Soccer/Football game.

American Football and Football are different things. The first is what Americans call football, while the other is what Americans call soccer. It is confusing.

Answer:

Electric

Explanation:

Because they are charged objects

Answer:

Ok

Explanation:

Answer:

Explanation:

Mechanical energy is the sum of all potential energy and kinetic energy .

Answer:

Its a fuse.

Explanation:

Answer:

3. 1.8A

Explanation:

Given the following data;

Quantity of charge, Q = 650C

Time = 6 minutes to seconds = 6 * 60 = 360 seconds.

To find the current l;

Quantity of charge = current * time

Substituting into the equation, we have;

650 = current * 360

Current = 650/360

Current = 1.8 Amperes

Answer:

Sophie gained 1,599.36 J of GPE

Explanation:

Gravitational Potential Energy  (GPE)

Gravitational potential energy is the energy stored in an object because of its vertical position or height in a gravitational field.

It can be calculated with the equation:

U=mgh

Where:

m = mass of the object

h  = height with respect to a fixed reference

g  = acceleration of gravity ([tex]9.8 m/s^2[/tex])

Sophie has a mass of m=48 Kg and climbs a ladder that takes her to a height of h=3.4 m.

Calculate the GPE she gained:

U = 48 * 9.8 * 3.4

U = 1,599.36 J

Sophie gained 1,599.36 J of GPE

Answer: NOT B) Electric potential energy is the charge divided by the electric potential difference.

Explanation:

just missed it on edg

Answer: Choice C

Explanation:

Answer:

Nobody knows...

Explanation:

Answer:

C. 90°

Explanation:

The critical angle is that angle of incidence in the dense medium where the angle of refraction is 90°.

In this case, light travels from the more optically dense medium to the less optically dense medium.

When the angle of incidence in the dense medium is equal to the critical angle, the angle of refraction is 90°.

Answer:

the quantity which has both magnitude and direction is called vector quantity

Answer:

The leverage or mechanical advantage of pulleys is less obvious, but you can "gang" multiple pulleys together into two sets (blocks) and run the ropes back and forth between the two sets to increase the number of lengths of rope running between them. One end of the rope is connected (fixed) to one of the blocks, and you get to pull on the other end after it is passed back and forth between the blocks of pulleys. This is sometimes called a block and tackle arrangement. With a hook on each side of the block set, you can move a heavy load much like levers do, by multiplying the force. You have to pull more rope just like you have to move a lever more on one side of the fulcrum as compared to the other. When you get all the rope pulled out that you can, you can not move the load anymore because you have become "two-blocked" which means the two blocks are together. Credits to: Moin Khan

Mars is the focus of much scientific study about possible human colonization. Its surface conditions and the presence of water on Mars make it arguably the most hospitable of the planets in the Solar System, other than Earth. Mars requires less energy per unit mass (delta-v) to reach from Earth than any planet except Venus.

Permanent human habitation on a planetary body other than the Earth is one of science fiction's most prevalent themes. As technology has advanced, and concerns about the future of humanity on Earth have increased, the argument that space colonization is an achievable and worthwhile goal has gained momentum. Other reasons for colonizing space include economic interests, long-term scientific research best carried out by humans as opposed to robotic probes, and sheer curiosity.

One of Elon Musk's stated goals through his company SpaceX is to make such colonization possible by providing transport, and to "help humanity establish a permanent, self-sustaining colony on Mars within the next 50 to 100 years".

Many organizations support the colonization of Mars. They have also given different reasons and ways humans can live on Mars. One of the oldest organizations is the Mars Society. They promote a NASA program that supports human colonies on Mars. The Mars Society have set up Mars analog research stations in Canada and the United States. All other organizations include MarsDrive, who wants to help fund settlements on Mars, and Mars to Stay. Mars to Stay advocates settlements on Mars. In June 2012, Mars One released a statement that they believe could help start a colony on Mars by 2023.

Answer:

The position x, is ± 0.4 m.

Explanation:

The total mechanical energy of the oscillatory motion is given as;

[tex]E_T = U +K.E\\\\E_T = \frac{1}{2} kA^2\\\\ \frac{1}{2} kA^2 = U +K.E\\\\K.E = \frac{1}{2} kA^2 - U ----equation(1)[/tex]

When the kinetic energy (E) is half of the elastic potential energy (U);

[tex]K.E = \frac{U}{2} ----equation(2)[/tex]

Equate (1) and (2)

[tex]\frac{U}{2} = \frac{1}{2} kA^2 - U\\\\U = kA^2 -2U\\\\U+2U = kA^2\\\\3 U = kA^2\\\\3(\frac{1}{2} kx^2) = kA^2\\\\\frac{3}{2} x^2=A^2\\\\x^2 = \frac{2}{3} A^2\\\\x = \sqrt{\frac{2}{3} A^2} \\\\x = A\sqrt{\frac{2}{3} } \\\\x = 0.49\sqrt{\frac{2}{3} }\\\\x = + /- (0.4 \ m)[/tex]

Thus, the position x, is ± 0.4 m.

The question mentions an illustration that is not provided, but I can solve the problem anyway.

Answer:

Ua - Ub = 5,390 J regardless of the reference height

Explanation:

Gravitational Potential Energy

Gravitational potential energy is the energy stored in an object because of its vertical position or height in a gravitational field.

It can be calculated with the equation:

U=m.g.h

Where m is the mass of the object, h is the height with respect to a fixed reference, and g is the acceleration of gravity or [tex]9.8 m/s^2[/tex].

The problem is about proving the difference in potential energy does not depend on the reference used to calculate them.

a. Let's set the zero level for gravitational potential energy at B, i.e., h=0 at B.

The m=55 kg skier is at the top of the slope (point A) at a height of h=10 m.

The gravitational potential energy Ua is:

Ua = 55 * 9.8 * 10 = 5,390 J

The gravitational potential energy Ub (h=0) is:

Ub = 55 * 9.8 * 0 = 0 J

The difference is:

Ua - Ub = 5,390 J - 0 J = 5,390 J

b. Now fix the zero level at point A (h=0).

The gravitational potential energy Ua (h=0) is:

Ua = 55 * 9.8 * 0 = 0 J

Point B is at a height h=-10 m since it's below the reference.

The gravitational potential energy Ub (h=-10) is:

Ub = 55 * 9.8 * (-10) = -5,390 J

The difference is:

Ua - Ub = 0 J - (-5,390 J) = 5,390 J

We get the same value.

c. Finally, fix the reference at the midpoint between A and B.

Point A is at a height h=5 m since it's 5 m above the reference.

The gravitational potential energy Ua is:

Ua = 55 * 9.8 * 5 = 2695 J

Point B is at a height h=-5 m since it's 5 m below the reference.

The gravitational potential energy Ub is:

Ub = 55 * 9.8 * (-5) = -2695 J

The difference is:

Ua - Ub = 2695 J - (-2695 J) = 5,390 J

Again, we get the same value.

Conclusion:

Ua - Ub = 5,390 J regardless of the reference height

Answer:

B) interval training

Explanation:

Interval training is a type of training in which the period of intense activity alternates with the period of active recovery. The duration and intensity of the work interval together with the duration and intensity of the recovery interval make up one series.

When planning interval training, it is necessary to determine: 1. the duration and intensity of the working interval, 2. the duration and intensity of the recovery interval, and 3. the total number of series.

Precisely because of the larger number of variables and the unlimited possibility of combinations, interval training is more efficient and interesting than continuous training.