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2 years ago

RETAKE - A push or a pull that causes an object to change its motion is called!

Physics

2 answers:

frozen [14]2 years ago

6 0

Answer: Force

Explanation: Force is defined as a push or pull acting on an object

Ann [662]2 years ago

6 0

Answer:

Force is defined as a push or pull acting on an object. Forces include gravity, friction, and applied force. Force causes changes in the speed or direction of motion. These changes are called acceleration.

Explanation:

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Two students are sitting 1.50 m apart. One student has a mass of 70.0 kg and the other has a mass of 52.0 kg. What is the gravit

algol [13]

Answer:

The gravitational force between them is $1.079\times10^{-7}\ N$ .

Explanation:

Given that,

Distance = 1.50 m

Mass of one student = 70.0 kg

Mass of other student = 52.0 kg

We need to calculate the gravitational force

Using formula of gravitational force

$F=\dfrac{Gm_{1}m_{2}}{r^2}$

Where, m₁ = mass of one student

m₂ = mass of other studen

r = distance between them

Put the value into the formula

$F=\dfrac{6.67\times10^{-11}\times70.0\times52.0}{1.50^2}$

$F=1.079\times10^{-7}\ N$

Hence, The gravitational force between them is $1.079\times10^{-7}\ N$ .

5 0

3 years ago

action and reaction are equal in magnitude and opposite in direction then , why do not they balance each other

Galina-37 [17]

Explanation:

Newton’s third law of motion states that every action has an equal and opposite reaction. This indicates that forces always act in pairs. Reaction forces are equal and opposite, but they are not balanced forces because they act on different objects so they don’t cancel each other out.

5 0

2 years ago

Many physical quantities are connected by inverse square laws, that is, by power functions of the form f(x)=kx^(-2). In particul

goldenfox [79]

Answer:

4 times

Explanation:

Since the equation for the illumination of an object, i.e. the brightness of the light, is <em>inversely proportional to the square of the distance from the light source</em>, the form of the function is:

f(x) = k.x⁻²

Where x is the distance between the object and the light force, k is the constant of proportionality, and f(x) is the brightness.

Then, if you move halfway to the lamp the new distance is x/2 and the new brightness (call if F) is :

$F=k(x/2)^{-2}=\frac{k}{(x/2)^2}= \frac{k}{x^2}. 4=f(x).4$

Then, you have found that the light is 4 times as bright as it originally was.

3 0

2 years ago

If all colors of light are mixed together, what color will he seen?

ANTONII [103]

Answer:

Black. or a dark brown.

5 0

3 years ago

Read 2 more answers

A NATO base in northern Norway is warmed with a heat pump that uses 7.0 °C ocean water as the cold reservoir. Heat extracted fro

tatiyna

Answer:

3.33, 4.84

Explanation:

A) Actual coefficient of performance can be calculated by the formula stated below

Actual COP = heat delivered/ work required

Actual COP = 2,000/600

Actual COP = 3.33

B) Th = High temperature = 80°C + 273 = 353K

Tl = Low temperature = 7°C + 273 = 280K

The theoretical maximum coefficient of performance can ve calculated by the formula

Theoretical COP = Th/(Th-Tl)

Theoretical COP = 353/(353-280)

Theoretical COP = 353/73

Theoretical COP = 4.84

3 0

3 years ago