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3 years ago

Which one of the risk factors that influence you learn how may be most difficult to control as a young teen

Physics

1 answer:

nalin [4]3 years ago

8 0

I hope my answer helped u under stand better

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Tcecarenko [31]

The answer of this question is B.

5 0

3 years ago

Two objects, A and B, each of mass o.22 kg, are moving at 0.34 m/s directly toward each other. What is the speed of Object A aft

ki77a [65]

Theoretically, if the objects have the same mass and are moving towards each other at a speed of $0.34m s^{-1}$ , after a perfectly elastic collision, the object A is supposed to move with the same velocity in the opposite direction.

6 0

3 years ago

Rahul has 2 bulbs connected across two cells in a simple circuits shown. How can he make the bulbs glow dimmer?

Ray Of Light [21]

Answer:

in the parallel connection the light bulbs shine less than in the series connection

Explanation:

In a series circuit the current through the whole circuit is the same, therefore the power (brightness) of each bulb is

P = i² R

where R is the resistance of each bulb and i the current of the circuit.

If we connect the light bulbs and the cells in parallel, the current in the circuit is the sum of the east that passes through each light bulb,

i = i₁ + i₂

if the two light bulbs are the same

i = 2 i₁

i₁ = i / 2

so the power of each bulb is is

P = i₁² R

P = R i² / 4

P = ¼ P_initial

Therefore we see that in the parallel connection the light bulbs shine less than in the series connection

3 0

3 years ago

the end of the tracks, 8.8 m lower vertically, is a horizontally situated spring with constant 5 × 105 N/m. The acceleration of

devlian [24]

Answer

Assuming the mass of the car, m = 43000 kg

initial speed u = 0

vertical distance moved, h = 8.8 m

spring constant k = 5 x 10⁵ N / m

acceleration of gravity = 9.8 m/s²

From law of conservation of energy ,

Gravitational potential energy at starting position =potential energy of the spring at maximum compression

$m g h =\dfrac{1}{2}k x^2$

$x = \sqrt{\dfrac{2mgh}{k}}$

$x = \sqrt{\dfrac{2\times 43000\times 9.8\times 8.8}{5\times 10^5}}$

x = 14.83 m

If the mass of the car is equal to 43000 Kg the spring is compressed to 14.83 m

6 0

3 years ago

When placed at a certain point, a 4.20 C charge feels an electric force of 2.55 N. What is the magnitude of the electric field a

Igoryamba

0.607 N/C, working shown on photo

6 0

3 years ago

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