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3 years ago

12

Creativity helps a scientist to

1 answer:

andriy [413]3 years ago

6 0

The answer is A.

Proposal raised by creativity is usually non-testable, scientist will set a topic for the project first, and do the relative experiments to prove it

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Consider the model above. It represents the electrical force. As r increases, the attractive force decreases. How would this mod

aivan3 [116]

Answer:

As we keep on increasing the radius the value of the gravitation force of attraction decreases and as we decrease the radius the gravitation force increases.

Explanation:

Like the coulombs law of electrostatics, the law of gravitation also depends inversely on the square of the value of r. Therefore, as we keep on increasing the value of r the value of the gravitation force decreases and as we decrease the value of the r the value of gravitation force increases.

Gravitation Force= $\frac{Gm_{1}m_{2} }{r^{2}}$

Coulombs's Law= $\frac{Kq_{1}q_{2} }{r^{2}}$

6 0

4 years ago

Read 2 more answers

A Plane has a takeoff speed of 150 m/s and requires 1500m to reach that speed. Determine the acceleration of the plane and the t

mars1129 [50]

<u>Answer:</u>

The acceleration of the plane and the time required to reach this speed is (a)= 7.5 $m/sec^2$ and time(t) = 20 seconds

<u>Explanation: </u>

Given data Initial velocity $(V_i)$ = 0

Final velocity ( $V_f$ ) = 150 m/second

Distance (d) = 1500 m

We have the formula, $\mathrm{V}_{\mathrm{f}}^{2}=\mathrm{V}_{\mathrm{i}}^{2}+2 \mathrm{ad}$

which gives $150^2$ = 0+2a(1500)

22500 = 3000 a

acceleration (a) = 7.5 $m/s^2$

$\mathrm{V}_{\mathrm{f}}=\mathrm{V}_{\mathrm{i}}+\mathrm{at}$

150 = 7.5 t

t= 150/7.5 = 20

t = 20 seconds.

5 0

3 years ago

A steel playground slide is 5.25 m long and is raised 2.75 m on one end. A 45.0 kg child slides down from the top starting at re

Temka [501]

Answer:

$F=32.24N$

Explanation:

From the question we are told that:

Height $h= 2.75 m$

Length $l = 5.25 m$

Mass $m=45kg$

Final speed $v_f=6.81$

Generally the equation for Potential Energy P.E is mathematically given by

$P.E=mgh$

Therefore

Initial potential energy

$P.E_1=45*9.8*2.75 \\\\P.E_1= 1212.75 J$

Generally the equation for Kinetic Energy K.E is mathematically given by

$K.E=0.5mv^2$

Therefore

Final kinetic energy

$K.E_2= 1/2*45*6.81*6.81 \\\\K.E_2= 1043.46J$

Generally the equation for Work_done is mathematically given by

$W=P.E_1-K.E_2\\\\W=169.3$

Therefore

$F=\frac{W}{d}\\\\F=\frac{169.3}{5.25}$

$F=32.24N$

8 0

3 years ago

Adding a catalyst to a reaction has an effect similar to

mariarad [96]

The answer to your question is B.

8 0

3 years ago

Atoms of which pair of elements will form ionic bonds in a compound?

pishuonlain [190]

Answer:

Be and Cl

Explanation:

This pair will form an ionic bond because Be is a metal while Cl is a nonmetal.'

Ionic bonds are bonds between nonmetals and metals.

5 0

2 years ago