plzzzzzz helppp out with thiss​

Explanation:

Assuming the strength training sessions last roughly 20 minutes each, that breaks down to about three hours of exercise a week. According to these recommendations, beginner exercisers should work up to three to four 40-minute gym sessions per week.

The American Heart Association recommends 75 to 150 minutes of aerobic activity, and two strength training sessions per week. Assuming that strength training sessions last approximately 20 minutes each, that totals about three hours of exercise per week.

The answer is B. It has a central nucleus composed of 29 protons and 35 neutrons, surrounded by an electron cloud containing 29 electrons.

Given the data from the question, the correct statement is:

An atom is composed of a centrally placed nucleus (containing protons and neutrons) and a cloud of electrons revolving round it.

Mass number = Proton + Neutron

64 = 29 + Neutron

Collect like terms

Neutron = 64 – 29

Neutron = 35

Note

Proton = Electron = 29 (since the atom is neutral)

Thus, we can conclude that the atom has central nucleus composed of 29 protons and 35 neutrons, surrounded by an electron cloud containing 29 electrons  (Option B)

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Answer:

See explanation

Explanation:

Range of a projectile is given by; U^2sin2θ/g

When θ = 45°

The maximum range is obtained as;

Rmax = U^2/g

Maximum range on earth = RME = U^2/g

Maximum range in the moon= RMM =U^2/g/6

Maximum range in Mars = RMMA = U^2/0.38g

a)

RME/RMM =  U^2/g/U^2/g/6

RME/RMM = 6

But RME = 3 m

RMM = 3 * 6 = 18 m

b)

RME/RMMA =U^2/g/U^2/0.38g

RME/RMMA = 1/0.38

But RME = 3 m

RMMA = 3/0.38

RMMA = 7.9 m

Answer:

F1 = 16 N and F2 = 24 N

Explanation:

Formula used => F = m×a and v-u= at

So, as we know force = mass × acc.

so acc. of first block = <math> F1/5 </math>. and acc. of second block = <math> F2/ 8 </math>.......... so as v-u= at.. now

Here u= 0 as the objects are placed at rest initially..

thus, v= at

FOR 1ST BLOCK

16= <math> F1/5 </math> × 5 ==> F1 = 16 N

FOR 2ND BLOCK

15= <math> F2/ 8 </math> × 5 ==> F2= 24 N

Answer:

1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity.

Explanation:

each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

Answer:

D

Explanation:

The relationship between bond strength and the melting and boiling points can be explained as the force between the particles increases, and the melting and boiling points also increase.​Therefore the correct option is D.

It is a temperature at which the pressure exerted by the external atmosphere is equal to the vapor pressure of the substance.

The boiling point depends on atmospheric pressure, temperature, bond strength, and vapor pressure of the liquid.

The bond strength between different atoms of the substance greatly influences the boiling point and melting point.

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Answer:

the answer is c

Explanation:

Answer:

See answer below

Explanation:

In order to do this, we just need to apply the expression to determine the time of flight. This is given by:

t = 2 V₀ Sinθ / g   (1)

We have the initial speed which is 200 m/s, the angle of elevation to the horizontalis 60° and the gravity is 9.8 m/s². Replacing this data in the above expression we have:

t = 2 * 200 Sin60° / 9.8

Now that we have the time, we can determine the range or distance in the horizontal plane. This can be calculated using the following expression:

X = V * t   (2)

We already have the time, which is the time of flight, the initial speed using cos 60° (Cause it's horizontal plane), and replacing we have:

X = 200 cos60° * 35.348

X = 100 * 35.348

Hope this helps

Answer:

Explanation:

and please add me on sñap

The ocean is very calm and beautiful its so soft and the waves are beautiful especially at night.

Some people are afraid of the ocean because of probably sharks, fish, or those grass in the ground. some times they think the ocean is going to take them away i think thats a phobia.

Answer:

Water set free by magma began to cool down the Earth's atmosphere, until it could stay on the surface as a liquid. ... The sun, which drives the water cycle, heats water in the oceans. Some of it evaporates as vapor into the air. Ice and snow can sublimate directly into water vapor.

Answer:

car 4 i think

Explanation:

Answer:

car 3

Explanation:

car 1 - fastest - .5 seconds per meter

car 2- 2nd fastest - 1 second per meter

car 4 - 3rd fastest - 1.25 seconds per meter

car 3 - slowest - 1.5 seconds per meter

Answer:

20N

Explanation:

newtons 3rd law every action has an equal opposite reaction

I'm not too sure

Answer:

0

Explanation:

Defining velocity :

Velocity is a vector which is the ratio of a person's total displacement with time.

Displacement, in simple terms refers to the distance between an individual's initial position to his final position.

Man's initial position = House

After all his navigation and points covered irrespective of the distance ;

Final position = House

Hence, we can conclude that the man's Displacement is ;

Final position - Initial position = 0

Hence,

Velocity = Displacement / time taken

Velocity = 0 / 3

Velocity = 0

Answer:

Electricity works by getting a bunch of conductor elements together and creating a flow of electron-stealing patterns through them. This flow is called a current. Conductors need to be surrounded with insulators so the electrons can only go in one direction.

Explanation:

Answer:

Turning on a light bulb.

Answer:

Explanation:

Comment

It's a deceleration. You are slowing down.

Givens

vi = 17 m/s

vf = 10 ms

m = 6 kg

delta mv = ?

Formula

delta mv = m * (vf - vi)

Solution

delta mv = 6 (10 - 17)

delta mv = 6 ( -7)

delta mv = - 42

Answer:

Seismograph

Explanation:

Seismograph, instrument that makes a record of seismic waves caused by an earthquake, explosion, or other Earth-shaking phenomenon.

Answer:

1 Ohm is defined as the resistance of a conductor with a potential difference of 1 volt applied to the ends through which 1-ampere current flows. Ohms is the SI unit of electrical resistance

Answer:

K.E =1÷2M×V^2

= 1÷2×0.05×(400)^2

= 4000

Explanation:

Answer:

Ver explicacion

Explanation:

Según el modelo cinético, las moléculas de gas están en constante movimiento.

La energía cinética promedio de las moléculas del gas depende de la temperatura del gas y de la masa molar del gas.

Si los dos gases ocupan el mismo volumen a la misma temperatura, la energía cinética promedio ahora depende de la masa molar de los gases individuales. Cuanto menor sea la masa molar del gas, mayor será la velocidad media de las moléculas del gas.

El oxígeno gaseoso tiene una masa molar menor que el dióxido de carbono. Por lo tanto, el oxígeno tiene una velocidad molecular promedio mayor que el dióxido de carbono.

Answer:

if more angle = high resultant force.

as resultant force is directly proportional to the angle.(mgsintheta

i dont get it so much but

The weight of the bag pack is 8.2 N. g = 1.64 m/s2. Hence, the acceleration due to gravity on moon is 1.64 m/s2. sooo? is it right

Answer:

La velocidad más alta jamás alcanzada en una carrera de Fórmula 1 es mayor que la velocidad de crucero del avión comercial.

Explanation:

Para poder comparar la velocidad entre el avión comercial y la velocidad alcanzada en la carrera de Fórmula 1 y saber cuál es mayor, dichas velocidades deben estar expresadas en las mismas unidades.

En este caso, se ha decidido expresar la velocidad del avión en m/s. Siendo 1 km equivalente a 1.000 m y 1 h igual a 3.600 segundos, entonces es posible realizar la siguiente conversión:

[tex]900\frac{km}{h} =900\frac{1.000 m}{3.600 s}= 250 \frac{m}{s}[/tex]

Por lo que 900 km/h es equivalente a 250 m/s. Siendo 303,5 m/s mayor a 250 m/s, entonces la velocidad más alta jamás alcanzada en una carrera de Fórmula 1 es mayor que la velocidad de crucero del avión comercial.

Answer:

Units of work would be equivalent to a Newton times a meter. ... An individual force does NOT do positive work upon an object if the object is moving at ... FALSE - Watt is the standard metric unit of power; Joule is the standard metric unit of energy. ... TRUE - A kg•m2/s2 is a mass unit times a speed squared unit, making it a ...

Answer: Stored energy

Answer:

An atom of fluorine has the atomic number 9, and its mass number is 19 amu. Which of the following shows a neutral atom of fluorine? 16 protons and 14 electrons.

Explanation:

ITs 16 protins and 14 ELECTRONS

Answer:

Answer is 9 Protons, 10 Neutrons, and 9 Electrons

Explanation:

A.P.E.X

Answer:

It gives the generating plant more water to use to generate electricity