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3 years ago

How do objects with the same charger interact

2 answers:

7 0

The interaction between two like-charged objects is repulsive. ... Positively charged objects and neutral objects attract each other; and negatively charged objects and neutral objects attract each other.

nydimaria [60]3 years ago

5 0

Answer:

they repel with each other. object of like charges repel while object of opposite charges attracts with each other.

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g) If two cars A and B are moving with velocity 60 km/hr and 80 km/hr respectively in the same direction. What will be the relat

tester [92]

Explanation:

Here,

Velocity of A=60km/hr

Velocity of B=80km/hr

Now,

Relative velocity of B with respect to A in the same direction=Velocity of B - Velocity of A

=80km/hr-60km/hr

=20km/hr

4 0

2 years ago

4.Upthrust doesnt depend on the following Physical quantity?

NemiM [27]

Answer:

C: Mass of body

Explanation:

Upthrust is defined as the upward force that a liquid will exert on a body floating atop it.

Now, Formula for upthrust is;

Upthrust = density of liquid × volume of the body × acceleration due to gravity.

From the formula, we can see that upthrust depends on density, volume and acceleration due to gravity.

Thus, looking at the options, the one that doesn't apply is mass of body.

8 0

3 years ago

Un bloque de 20kg de masa se desplaza horizontalmente en la dirección de eje X por acción de una fuerza horizontal variable F =

zmey [24]

Answer:

a) El trabajo realizado por esta fuerza mientras el bloque se mueve desde la posición x = + 10 m hasta la posición x = + 20 m es 900 joules.

b) La rapidez del bloque en la posición x = + 20 metros es aproximadamente 5.701 metros por segundo.

Explanation:

a) El trabajo expermentado por el bloque ( $W$ ), medido en joules, es definida por la siguiente ecuación integral:

$W = \int\limits^{x_{max}}_ {x_{min}} F(x) \, dx$ (1)

Donde:

$x_{min}$ , $x_{max}$ - Posiciones mínima y máxima del bloque, medidos en metros.

$F(x)$ - Fuerza horizontal aplicada al bloque, medida en newtons.

Si conocemos que $F(x) = 6\cdot x$ , $x_{min} = 10\,m$ y $x_{max} = 20\,m$ , entonces el trabajo realizado por esta fuerza es:

$W = \int\limits^{20\,m}_{10\,m} {6\cdot x} \, dx$ (2)

$W = 6\int\limits^{20\,m}_{10\,m} x\, dx$

$W = 3\cdot x^{2}\left|\limits_{10\,m}^{20\,m}$

$W = 3\cdot [(20\,m)^{2}-(10\,m)^{2}]$

$W = 900\,J$

El trabajo realizado por esta fuerza mientras el bloque se mueve desde la posición x = + 10 m hasta la posición x = + 20 m es 900 joules.

b) La rapidez final del bloque se determina mediante de Teorema del Trabajo y la Energía, es decir:

$W = K_{f}-K_{o}$ (3)

Donde son $K_{o}$ , $K_{f}$ las energías cinéticas traslacionales inicial y final, medidos en joules.

Al aplicar la definición de energía cinética traslacional, expandimos y simplificamos la ecuación como sigue:

$W = \frac{1}{2}\cdot m \cdot (v_{f}^{2}-v_{o}^{2})$ (4)

Donde:

$m$ - Masa del bloque, medido en kilogramos.

$v_{o}$ , $v_{f}$ - Rapideces inicial y final del bloque, medidos en metros por segundo.

$\frac{2\cdot W}{m} = v_{f}^{2}-v_{o}^{2}$

$v_{f} = \sqrt{\frac{2\cdot W}{m}+v_{o}^{2}}$

Si conocemos que $W = 900\,J$ , $m = 20\,kg$ y $v_{o} = \sqrt{10}\,\frac{m}{s}$ , entonces la rapidez final del bloque es:

$v_{f} = \sqrt{\frac{900\,J}{2\cdot (20\,kg)}+10\,\frac{m^{2}}{s^{2}} }$

$v_{f} \approx 5.701\,\frac{m}{s}$

La rapidez del bloque en la posición x = + 20 metros es aproximadamente 5.701 metros por segundo.

6 0

3 years ago

A golfer hits a golf ball with a velocity of 36.0 meters/second at an angle of 28.0°. If the hang time of the golf ball is 3.44

Ray Of Light [21]

Solving this using the time, we know that range = horizontal velocity x time of flight

since there are no horizontal forces acting on the ball, there are no horizontal accelerations and the initial horizontal velocity of 36 cos 28 will be constant throughout. If we use the correct time of flight given the launch parameters, we have 

range = 36 cos 28 x 3.44 s = 109.3 m

5 0

3 years ago

Explain how a guitar produces sound by using the terms standing waves and resonance.

Rzqust [24]

When an object is forced into resonance vibrations at one of its natural frequencies, it vibrates in a manner such that a standing wave is formed within the object. ... such patterns are only created within the medium at specific frequencies of vibration.

5 0

3 years ago