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konstantin123 [22]

3 years ago

8

of 72.0 units. If the mass of Object 1 is halved AND the mass of object 2 is tripled, then the new gravitational force will be u

nits.

1 answer:

katen-ka-za [31]3 years ago

6 0

Answer:

youtg jugre contact coming call details

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An electron is released at rest from point A. It moves in response to the electric field of a fixed charge distribution along a

Tom [10]

Answer:

$v=8.89\times 10^{15}\ m/s$

Explanation:

An electron is released at rest from point A. It moves in response to the electric field of a fixed charge distribution along a path that takes it through point B.

Potential at point A, $V_A=-11\ V$

Potential at point B, $V_B=25\ V$

Let v is the speed of the electron as it passes point B. It can be calculated using the conservation of energy theorem as :

$\dfrac{1}{2}mv^2-\dfrac{1}{2}mu^2=V_B-V_A$

Here, u = 0

$\dfrac{1}{2}mv^2=25-(-11)$

$mv^2=72$

$v=\sqrt{\dfrac{72}{m}}$

m is the mass of electron

$v=\sqrt{\dfrac{72}{9.1\times 10^{-31}}}$

$v=8.89\times 10^{15}\ m/s$

So, the electron's speed as it passes point B is $8.89\times 10^{15}\ m/s$ . Hence, this is the required solution.

3 0

3 years ago

A baseball is hit from a height of 4 feet above the ground with an initial velocity of 110 feet per second and at an angle of 35

mrs_skeptik [129]

Answer:

Part a)

$h = 62.2 ft$

Part b)

It will not able to cross the pole

Explanation:

As we know that ball is hit with speed of 110 ft/s at an angle of 35 degree

so here we will say

$v_y = 110 sin35$

$v_x = 110 cos35$

now at the maximum height the vertical velocity will become zero

so here we can use kinematics

$v_f^2 - v_y^2 = 2 a h$

here we have

$a = -32 ft/s^2$

$v_f = 0$

$v_y = 63.1 ft/s$

now we have

$0 - 63.1^2 = 2(-32)h$

$h = 62.2 ft$

Part b)

now the height of ball is related to the distance from point of projection is given as

$y = xtan\theta - \frac{gx^2}{2v^2cos^2\theta}$

now we know that

$x = 375 ft$

$y = 375(tan35) - \frac{(32)(375^2)}{2(110^2)(cos35)^2}$

$y = 262.6 - 277.12 = -14.5 ft$

since its coming negative so it will not able to cross the pole

3 0

3 years ago

100 kg of R-134a at 280 kPa are contained in a piston-cylinder device whose volume is 8.672 m3. The piston is now moved until th

olganol [36]

Answer:

∆u =-111.8 kJ/kg

T_fin=-10.09℃

Explanation:

note:

<em>solution is attached in word file due to some technical issue in mathematical equation. please find the attached documents.</em>

4 0

4 years ago

Which statement best describes a similarity between presidential and

zlopas [31]

The statement 'both allow citizens to vote for members of the legislature' describes a similarity between presidential and parliamentary democracies. They are different forms of government.

<h3>Presidential and parliamentary democracies</h3>

Democracy refers to a form of government where people vote to choose authorities designed to decide legislation.

A presidential democracy is when the presented is voted to be the head of government (president) separately from the legislative system.

Parliamentary democracy is a form of government where the political party having the greatest representation in the legislature forms the government.

Learn more about presidential and parliamentary democracies here:

brainly.com/question/3069300

8 0

3 years ago

A physical representation of a real object, such as a globe of the world, is an ___ model

densk [106]

Answer;

-Physical model

A physical representation of a real object, such as a globe of the world, is a physical model.

Explanation;

-A physical model is a simplified material representation, usually on a reduced scale, of an object or phenomenon that needs to investigated.

-The model can be used to simulate the physical conditions involved (temperature, waves, speed etc.) and to predict the particular constraints of the situation.

5 0

3 years ago