01
Question 4
What is an atom's nucleus made of?
X a. protons only
b. only neutrons
c. electrons and protons
d. protons and neutrons

Answer:

104.59 m

Explanation:

The following data were obtained from the question:

Horizontal velocity (u) = 13 ms¯¹

Horizontal distance (s) = 60 m

Height (h) =?

Next, we shall determine the time taken for the car to get to the ground. This can be obtained as follow:

Horizontal velocity (u) = 13 ms¯¹

Horizontal distance (s) = 60 m

Time (t) =?

s = ut

60 = 13 × t

Divide both side by 13

t = 60 / 13

t = 4.62 s

Finally, we shall determine the height cliff. This can be obtained as follow:

Time (t) = 4.62 s

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

Height (h) =?

h = ½gt²

h = ½ × 9.8 × 4.62²

h = 4.9 × 21.3444

h = 104.59 m

Thus, the height of the cliff is 104.59 m

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]

m is the mass

v is the velocity

From the question we have

[tex]k = \frac{1}{2} \times 0.046 \times {15.5}^{2} \\ = 0.023 \times 240.25 \\ = 5.52575[/tex]

We have the final answer as

Hope this helps you

Answer:

The extension is directly proportional to the force exerted by the weight on the spring.

Explanation:

When the weight is suspended to a spring , the spring is extended through a length say x cm . This displacement is directly proportional to the force exerted on the spring equal to its weight.

Mathematically

F ∝ -x

F= -kx

where x is the displacement of the spring and k is the spring's constant whose value depends on the stiffness of the spring. F is the force exerted by the weight on the spring.

If more weight is added the extension will be greater . If less weight / force is applied the extension in the spring will be less.

Answer:

I would say A.

Explanation:

Homeostasis is pretty much a state of rest or equilibrium. Only A counts, as that wolf is trying to catch its breath and lower its breathing rate and heart rate.

(I could be wrong if B counts. Ya know, if the spider needs to stop being hungry?)

Answer:

Efficency = 28%

Explanation:

We have the load has a weight of:

[tex]w =m*g\\w =12*9.81\\w = 117.72 [N][/tex]

Work in physics is defined as the product of force (weight) by distance.

[tex]W=w*d[/tex]

where:

W = work [J]

w = weight = 117.72[N]

d = distance = 5 [m]

[tex]W=117.72*5\\W=588.6[J][/tex]

Now power is defined as the relationship of work at a certain time.

[tex]P=W/t\\[/tex]

where:

P = power [W]

W = work = 588.6[J]

t = time = 30[s]

[tex]P=588.6/30\\P=19.62[W][/tex]

Now the efficiency of a machine is defined as the power output over the power input to the machine. The power input should always be greater than the power output.

[tex]efficency = \frac{Power_{out}}{Power_{in}}\\Efficeny = \frac{19.62}{70} \\Efficency = 0.28\\Efficency = 28%[/tex]

Answer:

2 reasons because there are not many of them and they have so much energy that it is hard to capture one at all

Answer:

they have a lot of energy that can prove difficult to capture

Explanation:

Answer: Velocity is both magnitude and direction. Formula: d(distance)/t(total time)

Answer:

980N

100kg

Explanation:

Weight is Mass * Gravity.

For question a, the object with a mass of 100 kg will have a weight of

100 * 9.8 = 980N

For question b, the mass of the object will stay the same, even if it is on the moon. Therefore it is 100kg.

(a). The weight of the object on the Earth is 980 N.

(b). The mass of the object on the moon is 100 kg.

The weight of the object on the earth has been considered to be affected by the Gravitational force as it has been acting on the object.

(a) The weight of the object on Earth can be given by:

Weight = mass [tex]\times[/tex] Gravitational Force

Given, the mass of the object = 100 kg.

The gravitational force = 9.8N

Weight of the object = 100 [tex]\times[/tex] 9.8 N

Weight of the object = 980 N

(b) The mass of the object has been independent of the gravitational force that has been acting on the object.

Thus, the mass of the object on earth = the mass of object on the moon.

The mass of the object on the moon = 100 kg.

For more information about the mass of the object, refer to the link:

https://brainly.com/question/20353971

Explanation:

Total workdone force × distance

98×100= 9800J = 9.8kJ

Answer:

5) The approximate height is about 80 m. Choice (c)

6) The stone takes about 3 seconds to rise to its maximum height

Explanation:

Free Fall Motion

A free-falling object falls under the sole influence of gravity. Any object that is being acted upon only by the force of gravity is said to be in a state of free fall.

If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the gravitational acceleration, which value is [tex]g = 9.8 m/s^2[/tex].

The distance traveled by a dropped object is:

[tex]\displaystyle y=\frac{gt^2}{2}[/tex]

Question 5

Given the stone reaches the ground in t=4 seconds, the height of the tower is:

[tex]\displaystyle y=\frac{9.8*4^2}{2}=78.4\ m[/tex]

The approximate height is about 80 m. Choice (c)

Question 6

Vertical Motion

The vertical motion of an object is controlled by the force of gravity. This means that there is a non-zero net force acting on the object that makes it accelerate downwards.

If the object is thrown upwards at speed vo, its speed at time t is:

[tex]v_f=v_o-g.t[/tex]

The stone reaches its maximum height when the final speed is zero, thus:

[tex]v_o-g.t=0[/tex]

Solving for t:

[tex]\displaystyle t=\frac{v_o}{g}[/tex]

The stone is thrown vertically upwards with vo=30 m/s, thus:

[tex]\displaystyle t=\frac{30}{9.8}[/tex]

[tex]t=3.06\ s[/tex]

[tex]t\approx 3\ s[/tex]

The stone takes about 3 seconds to rise to its maximum height

Answer:

500,300

Explanation:

Safety measures on the road can be regarded as activities and precautions that should be taken in order to improve safety on the road which means to reduce risk.

Whenever one is driving with high-beam lights on, one of safety precautions that must taken into consideration is that ;

You must: (a) dim your high beams for oncoming vehicles by the time they are within 500 feet of your vehicle

(b) dim your high beams when the vehicle you are following is within 300 feet.

When you dim the beam, the oncoming vehicle won't be blind, he/she would be able to see clearly. As you are approaching a car with high-beams, look at the right edge of your own lane and use Conner of your eyes to watch the oncoming car to avoid been blind .

Answer:

diaetes

Explanation:

Answer:

A:  In an adiabatic process, no heat enters or leaves the system

Answer:

0.273 liters are needed to accomplish this task without boiling.

Explanation:

The minimum boiling point of kerosene is [tex]150\,^{\circ}C[/tex]. According to this question, we need to determine the minimum volume of liquid such that heat received is entirely sensible, that is, with no phase change.

If we consider a steady state process and that energy interactions with surrounding are negligible, then we get the following formula by the Principle of Energy Conservation:

[tex]\rho_{k}\cdot V_{k}\cdot c_{k}\cdot (T-T_{k,o}) = m_{t}\cdot c_{t}\cdot (T_{t,o}-T)[/tex] (1)

Where:

[tex]\rho_{k}[/tex] - Density of kerosene, measured in kilograms per cubic meter.

[tex]V_{k}[/tex] - Volume of kerosene, measured in cubic meters.

[tex]c_{k}[/tex], [tex]c_{t}[/tex] - Specific heats of the kerosene and tin, measured in joule per kilogram-Celsius.

[tex]T_{k,o}[/tex], [tex]T_{t,o}[/tex] - Initial temperatures of kerosene and tin, measured in degrees Celsius.

[tex]T[/tex] - Final temperatures of the kerosene-tin system, measured in degrees Celsius.

Please notice that the block of tin is cooled at the expense of the temperature of the kerosene until thermal equilibrium is reached.

From (1), we clear the volume of kerosene:

[tex]V_{k} = \frac{m_{t}\cdot c_{t}\cdot (T_{t,o}-T)}{\rho_{k}\cdot c_{k}\cdot (T-T_{k,o})}[/tex]

If we know that [tex]m_{t} = 1.83\,kg[/tex], [tex]c_{t} = 218\,\frac{J}{kg\cdot ^{\circ}C}[/tex], [tex]T_{t,o} = 88\,^{\circ}C[/tex], [tex]T_{k,o} = 24.0\,^{\circ}C[/tex], [tex]T = 57\,^{\circ}C[/tex], [tex]c_{k} = 2010\,\frac{J}{kg\cdot ^{\circ}C}[/tex] and [tex]\rho_{k} = 820\,\frac{kg}{m^{3}}[/tex], then the volume of the liquid needed to accomplish this task without boiling is:

[tex]V_{k} = \frac{(1.83\,kg)\cdot \left(218\,\frac{J}{kg\cdot ^{\circ}C} \right)\cdot (88\,^{\circ}C-57\,^{\circ}C)}{\left(820\,\frac{kg}{m^{3}} \right)\cdot \left(2010\,\frac{J}{kg\cdot ^{\circ}C} \right)\cdot (57\,^{\circ}C-24\,^{\circ}C)}[/tex]

[tex]V_{k} = 2.273\times 10^{-4}\,m^{3}[/tex]

[tex]V_{k} = 0.273\,L[/tex]

0.273 liters are needed to accomplish this task without boiling.

Answer:

0.03 A

Explanation:

Answer:

30A

Explanation:

I (current)= p (power) / V (voltage)

I= 6.9*10^3 / 230

I= 30A

Answer:

Nobel gases

Explanation:

Well since Krypton is in a group called the “Noble Gases”, then Krypton is similar to the others; Xenon, Helium, Neon, Argon, and Radon.

Answer:

where is the answer choices

Explanation:

Answer:

True

Explanation:

The momentum of the object won't change if it is left alone. However, if it is moved, the momentum will change. It depends on what you are talking about.

Explanation:

gas vibrate and moves freely at high speeds, liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place

hope it helps you

Answer:

Glycolysis

Pyruvate

Krebs Cycle

Electron Transport Chain

Explanation:

The concept map on ATP production shows the process of cellular respiration in living organisms.

Cellular respiration begins with glucose which is broken down in the process of glycolysis that occur in cytoplasm and gives 2 ATP. Glycolysis gives pyruvate as end product that enter in the process of Krebs Cycle or citric acid cycle as a aerobic process, that occur in mitochondria and produces 2 ATP. This energy is then used in Electron Transport Chain to pump high energy electrons and H+ that produces 36 ATP.

Answer:do you know how to draw a electronics configuration

Explanation:

Answer:

Explanation:

m = 55 kg

a = 9.8

F = ?

The first thing you are going to do is find the force that the girl represents.

F = 9.81 * 55

F = 539.55

But that is not the answer. That is her weight. A very important part of this question is to realize that the floor is pushing up on her with an equal force.

Her weight is going DOWN.

The floor is pushing UP with a force of 539.55 Newtons.

Answer:

C

Explanation:

The shorter a wire, the less it will be worn down from moving around, and the thicker the wire, the longer it will last.

Short wires with a wide diameter will be the material utilized to build a circuit with the minimum amount of resistance. Then, C is the right answer.

Electrical devices such as resistance, transistors, capacitors, inductors, and diodes are connected via conductive wires or traces that allow the electric current to pass between them.

A closed-loop system in which electrons can move is called a circuit. Electricity is supplied to the circuit by an electricity source, such as a battery. No electrons will travel till the circuit is finished, that is, it goes full round back to the electricity source.

A student wants to build a simple circuit.

The material would be used to design a circuit with the least amount of resistance will be short wires with a large diameter. Then the correct option is C.

More about the circuit link is given below.

https://brainly.com/question/12608516

#SPJ6

Answer:

False

Explanation:

Density is an intensive property of a substance. Intensive properties are those properties that are characteristic of a substance. They do not depend on the amount of substance present.

Since density is an intensive property, each piece of sulphur still has a density of 2g/cm3.

Answer:

heterogeneous mixture has components that are not evenly distributed. This means that you can easily distinguish between the different components.

Answer:

|Fr| = 50*√2  [N]

Explanation: (See Annex )

En el diagrama de cuerpo libre ( mostrado en el anexo) se ve que, al ser las dos fuerzas iguales (50 N) el paralelogramo formado para encontrar la resultante de las fuerzas (Fr)  es un cuadrado, y la diagonal de ese cuadrado ( que es al mismo tiempo la hipotenusa del triangulo recto OPA ) es igual a:

Hipotenusa = |Fr| = √ (50)² + (50)²

|Fr| = √2* (50)²

|Fr| = 50*√2  [N]

Answer: It will amount to 11p after 20 years.

Explanation:

Formula :

Simple interest = Principal x rate x Time              (i)

Amount = Principal + Interest

Amount = Principal +   Principal x rate x Time

Amount =  Principal (1+  rate x Time)                       (ii)

Given: Principal = p

After 1 year , amount = 1.5p

After 3 years , amount = 2.5p

From (ii)

[tex]1.5p = p (1+r)\\\\\Rightarrow\ 1.5=1+r\\\\\Rightarrow\ 0.5= r\\\\\Rightarrow r= 0.5[/tex]

Amount after 20 years = p(1+ 0.5 x 20) = p(1+10)=11p

It will amount to 11p after 20 years.

Explanation:

The mass of a cylinder made of barium with a height of 2 inches depends on the radius of the cylinder as defined by the

function m(r) = 7.18872.

which system of equations and solution can be used to represent the radius if the mass of the cylinder is 11,000 grams?

round to the nearest hundredth of an inch.