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3 years ago

8

Physics question: show work and circle answer

1 answer:

ruslelena [56]3 years ago

5 0

Answer:

F = 2 [N], choose option (2)

Explanation:

The principle of impulse is defined by the following expression:

Impulse = Force * Time

Force = force acting [N] or [kg*m/s^s]

Time = time during the impulse [s]

Replacing:

Impulse = 10[kg*m/s^2] * 10 [s]

Impulse = 0,1 [kg*m/s]

Now with this impulse, we can find the force for the new time.

F = Impulse/Time

F = 0.1[kg*m/s] / 0.05[s]

F = 2 [N]

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An eccentric inventor attempts to levitate a cork ball by wrapping it with foil and placing a large negative charge on the ball

djverab [1.8K]

Answer:

because of the idea that like charges get repulsion as a force.

Explanation:

because you wrap the ball with foil, the negative charges will leave the foil and go into the ball by induction. This leaves the foil as a positively charged particle since its electrons left it for the ball, making the ball a negatively charged particle. but if you bring the negative charge near the foil, the electrons will transfer from that and go into the foil, making it negatively charged. Now, because the ball and the foil have the same charge, they repel. the foil flies off.

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3 years ago

A radio have a wavelength of 0.3m and travels at a speed of 300,000,000 m/s. What is the frequency of this wave?

Ilya [14]

The frequency of the wave is $1\cdot 10^9 Hz$

Explanation:

The frequency, the wavelength and the speed of a wave are related by the following equation:

$c=f \lambda$

where

c is the speed of the wave

f is the frequency

$\lambda$ is the wavelength

For the radio wave in this problem,

$\lambda = 0.3 m$

$c=300,000,000 m/s = 3\cdot 10^8 m/s$

Therefore, the frequency is:

$f=\frac{c}{\lambda}=\frac{3\cdot 10^8}{0.3}=1\cdot 10^9 Hz$

Learn more about waves here:

brainly.com/question/5354733

brainly.com/question/9077368

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3 years ago

The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s is<br> J.

Svetlanka [38]

2.5 joules according to the formula k=1/2MVsquare we would get 2.5 joules as the answer

8 0

3 years ago

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Determine the value of V3 in volts where Vs = 15V, V1 = 5V, and V2 = 3V. Put the value of V3 in the box below without the units.

marshall27 [118]

Answer:

The value of V₃ is 7 V

enter value =7

Explanation:

Given that,

Source voltage $V_{s}=15 V$

First voltage $V_{1}=5V$

Second voltage $V_{2}=3V$

According to figure,

We need to calculate the value of third voltage

Using Kirchhoff voltage law

$V_{s}+V_{1}+V_{2}+V_{3}=0$

$-15+5+3+V_{3}=0$

$v_{3}=7\ V$

Hence, The value of V₃ is 7.

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3 years ago

It took 1.5 hours for a bus to go from one city to the next. The bus traveled at an average velocity of 52mph, west. How far apa

Elina [12.6K]

Answer: <u><em>78 miles apart if i can get brainliest that would be great </em></u>

Speed is given by dividing distance by time.

That is; speed = distance/time

In this case; speed = 52 mph and the time is 1.5 hours

Distance= speed × time

Thus; Distance = 52 × 1.5

= 78 miles

Thus the cities are 78 miles apart

8 0

3 years ago

Read 2 more answers