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Answer:

Net force is 7N, accelerations is 3.5 m/s/s

Explanation:

Answer:se obesrva ca indicele de refractie NU are unitate de masura, este adimensional. Se exprima print-un raport, de exemplu 4/3, 1,5 etc.

Explanation:

Explanation:

v=?, u=0, a=?, S=22m.

Using the formula, S=ut+½at²

22={0×5}+(½.a.5²)

22=½.a.5²

a=44/25 = 1.76m/s².

Therefore, net force = work done = ma = 48×1.76 = 84.48N.

therefore, power = work done/time = 84.48/5 = 16.896W.

hope this helps you.

Answer:a usually reversible change in the physical properties of a substance, as size or shape:

Freezing a liquid is a physical change.

Explanation:

If Kevin with mass 45kg pushes Kisha with a force of 54N, the magnitude of Kevin's acceleration is 1.2 m/s²

Kisha's mass = 60 kg

Kevin's mass = 45 kg

Kevin pushes off Kisha with a force of 54 N

Since it was Kevin that pushed Kisha, and the required force is 54N, we can look for Kevin's acceleration using the equation below

F  =  ma

The considered mass is Kevin's mass

54   =  45a

a   =   54/45

a   =    1.2 m/s²

The magnitude of Kevin's acceleration is 1.2 m/s²

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Answer:

V2 - V1 = a  t    for uniformly accelerated motion

t =  (V2 - V1) / a = (1100 -600) km/hr / 10 km/hr/sec

t = 500 / 10 sec = 50 sec

Answer:

Explanation:D

When two atoms bond chemically it is because of the interaction between the valence electrons in each atom because only the valence electrons of an atom are responsible for the chemical activity.

Therefore the correct answer is option D.

A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products.

Because only an atom's valence electrons are responsible for the chemical activity and because the quantity of valence electrons indicates an atom's valency,

Valency is a highly important requirement for the chemical reactivity of any element, two atoms connect chemically as a result of their contact.

Thus, the correct answer is option D.

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Answer:

360 m

Explanation:

Explanation is given in the attached image below.

Answer:

Explanation: Since work done is= to energy lost,the work done on this object will also be 50J...

Answer:When you rub the glass rod with the silk, the rod charges positive. If you place a charged rod on one of the swivel stands, and then bring another charged

Explanation: i no it

Answer:

i donot know

Explanation:

i done it for the first time

Answer:

I don't understand that language. This brainly is english.

Explanation:

[tex]\\ \sf\longmapsto No\;of\:moles=\dfrac{Given\:mass}{Atomic\:mass}[/tex]

[tex]\\ \sf\longmapsto No\:of\:moles=\dfrac{1.59}{0.0230}[/tex]

[tex]\\ \sf\longmapsto No\:of\:moles=69.13moles[/tex]

it prevents the current from passing through properly causing a surplus of voltage

Answer:

Pressure =Area × height

0.01N/cm=300cm×height

height=0.01×300

3cm

The weight of the book is equal to 3N.

Pressure can be described as the ratio of the force exerted to the surface area over which the force is exerted. We can define pressure as the force applied perpendicular to the surface per unit area over which that applied force is distributed.

The SI unit of pressure can be represented as the pascal (Pa). A pascal is the force of one newton (N) exerted over a surface area of 1 m². Since the pressure is dependent on the area so the pressure can be increased and decreased without changing the force.

Given, the pressure on the book, P = 0.01 N/cm²

The area of the book, A = 300 cm²

Pressure = Force/ Area

Force = Pressure ×Area

Force = 0.01  × 300 = 3 N

Weight of the book, W = mg = 3 N

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Answer:

for max :

100 feet in 10 secs

for molly :

60 feet in 5 secs = 120 feet in 10 secs

so, molly ran farther in the same time interval i.e. covered 120 feet where as Max covered 100 feet

Explanation:

brainliest plz

Answer:

1 no Max

2 no Molly

Explanation:

because if molly can run 60 feet in 5 second he can run 120 feet in 10 second

Answer:

NO Y

Explanation:

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Answer:

Wavelength is the distance between the two closest points that are in phase with each other along a wave.

Explanation:

Answer:

An object will not move unless acted upon by an unbalanced force.

Explanation:

Since Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

Hope this helps!!

According to Newton's law of motion an object will at a state unless and until a force act upon it. Hence, force is an external agent which change the state of an object.

Newton proposed three laws of motion explaining the motion an object. The first law states that an object will continue at the state of motion or rest unless a force acting on it.

Therefore force is an external agent which acts on a body to change it from the state of rest or motion. Force is directly proportional to the mass of the body. Hence, greater the mass, greater force must be applied to change its state.

The first of motion is called law of inertia, where inertia is the tendency of a body to stay in a state. Therefore, force changes this tendency of an object.

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Answer:

Below

Explanation:

To find the height of a ball thrown upwards we can use this formula :

     vf^2 = vi^2 + 2ad

     0^2 = 22^2 + 2(-9.8)d

     484 = 19.6d

     24.69 = d

     25 m = d

To find the time of the phone dropped we can use this formula :

     t = √2d/g

     t = √2(15) / 9.8

     t = √30/9.8

     t =√3.142857

     t = 1.749

    t = 1.7 seconds

For a) since this object is free falling we know that it will accelerate towards earth at a rate of 9.8 m/s^2. The slope of a velocity time graph gives us the acceleration of the object. So in this case the slope would be 9.8 m.s^2

Hope this helps!

Answer:

1) C.

swimming

2) A.

biking with occasional sprints

3) A.

True

4) B.

a variety of aerobic and anaerobic exercises

Explanation:

Answer:

air is compress able

since air can be compressed, then the hydraulics will not work as well. It won't be able to push the object or brake the wheels. Since water cannot be compressed, it is able to push something, that's how hydraulics work.

Explanation:

it reduces pressure and essentially makes the process less effective.

Answer:

80 kg weighs 80 kg x 9.8 m/s2 = 784 kg m/s2, or 784 Newtons. The surface gravity of Mercury is 0.39 that of Earth's (table 10-1), so 80 kg weighs 784 N x 0.39 = 306 N.

Explanation:

I hope that helps you

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