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valina [46]
2 years ago
14

Help me on this question

Physics
1 answer:
nikitadnepr [17]2 years ago
6 0
Adjust the height of the wooden rod so that it just touches the surface of the water. Switch on the lamp and motor and adjust the speed of the motor until low frequency waves can be clearly observed... Count the number of waves passing a point in ten seconds then Divide by ten to record frequency.
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A heavy dart and a light dart are launched vertically by identical ideal springs. Both springs were initially compressed by the
sveticcg [70]

Answer:

D

Explanation:

8 0
3 years ago
You have a ball with a mass 1.3 kg tied to a rope, and you spin it in a circle of radius 1.8m. If the ball is moving at a speed
BlackZzzverrR [31]

Answer:

6.5\; {\rm N}.

Explanation:

When an object travel at a speed of v in a circle of radius r, the (centripetal) acceleration of that object would be a = (v^{2} / r).

In this question, the ball is travelling at v = 3\; {\rm m\cdot s^{-1}} in a circle of radius r = 1.8\; {\rm m}. The (centripetal) acceleration of this ball would be:

\begin{aligned} a &= \frac{v^{2}}{r} \\ &= \frac{(3\; {\rm m\cdot s^{-1}})^{2}}{1.8\; {\rm m}} \\ &= 5\; {\rm m\cdot s^{-2}}\end{aligned}.

By Newton's Laws of Motion, for an object of mass m, if the acceleration of that object is a, the net force on that object would be m\, a. Since the acceleration of this ball is a = 5\; {\rm m\cdot s^{-2}}, the net force on this ball would be:

\begin{aligned} F &= m\, a \\ &= 1.3\; {\rm kg} \times 5\; {\rm m\cdot s^{-2}} \\ &= 6.5\; {\rm N} \end{aligned}.

7 0
2 years ago
Electroencephalography (EEG), in which electrodes placed on the scalp pick up electrical signals underneath, and magnetoencephal
Alexxx [7]
Does electrical curents flows of charges across the membrane and the depolarization continues also due to charges that reject each other and the flow continues .so there appears a magnetic field as well
6 0
3 years ago
In this formula, g=GM/R^2 , what do G ,m and R stand for?​
gtnhenbr [62]

Answer:

Explanation:

g means gravitation

G is universal gravitational constant

M = mass of the earth

R = radius of the earth

Hope this helps

plz mark as brainliets!!!!!!!!!

6 0
2 years ago
Scalars are used to solve projectile motion problems because they allow the analysis of one direction at a time for two-dimensio
Korolek [52]
The statement is false. Vectors are used to solve projectile motion problems because they allow the analysis of one direction at a time for two-dimensional motion. Scalar quantities can be used to analyze linear motion problem, but not projectile motion.
4 0
3 years ago
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