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3 years ago

While _[blank]_ science deals with knowledge discovery, _[blank]_ science deals with knowledge use.

Physics

1 answer:

Shtirlitz [24]3 years ago

8 0

Answer:

Explanation:

While pure science deals with knowledge discovery Applied science deals with knowledge use

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You, a 70 kg person, leap from a 10 m tall building and land feet first on a trampoline. The center of the trampoline where you

Anon25 [30]

Answer:

1373.4 N/m

Explanation:

Hooke's law states that the extension of a spring and force are related by the expression, F=kx where k is spring constant, x is extension of spring and F is the applied force. Making k the subject of the formula then

$k=\frac {F}{x}$

Also, F=gm hence the above formula is modified as

$k=\frac {gm}{x}$

Taking g as 9.81 m/s2 , x as 0.5 m and m as 70 kg then

$k=\frac {9.81\times 70 kg}{0.5m}=1373.4 N/m$

4 0

3 years ago

Two identical cylindrical vessels with their bases at the same level each contain a liquid of density 1.23 g/cm3. The area of ea

motikmotik

Explanation:

Work done by gravity is given by the formula,

W = $\rho A (h_{1} - h)g (h - h_{2})$ ......... (1)

It is known that when levels are same then height of the liquid is as follows.

h = $\frac{h_{1} + h_{2}}{2}$ ......... (2)

Putting value of equation (2) in equation (1) the overall formula will be as follows.

W = $\frac{1}{4} \rho gA(h_{1} - h_{2})^{2})$

= $\frac{1}{4} \times 1.23 g/cm^{3} \times 9.80 m/s^{2} \times 3.89 \times 10^{-4} m^{2}(1.76 m - 0.993 m)^{2})$

= 0.689 J

Thus, we can conclude that the work done by the gravitational force in equalizing the levels when the two vessels are connected is 0.689 J.

3 0

3 years ago

Which of the following is not an air pollutant?

Lelu [443]

Answer: 1. Carbon dioxide is not an air pollutant

Explanation: it can be toxic and or safe

7 0

2 years ago

Read 2 more answers

I need help plz and thank you❤

anzhelika [568]

I think:
In motion- 40
Not moving- 20

6 0

3 years ago

A rifle of mass M is initially at rest, but is free to recoil. It fires a bullet of mass m with a velocity +v relative to the gr

Natali5045456 [20]

Answer:

$V=-\dfrac{mv}{M}$

Explanation:

Given that

Mass of rifle = M

Initial velocity ,u= 0

Mass of bullet = m

velocity of bullet = v

Lets take final speed of the rifle is V

There is no any external force ,that is why linear momentum of the system will be conserve.

Initial linear momentum = Final linear momentum

M x 0 + m x 0 = M x V + m v

0 = M x V + m v

$V=-\dfrac{mv}{M}$

Negative sign indicates that ,the recoil velocity will be opposite to the direction of bullet velocity.

6 0

3 years ago