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DENIUS [597]
3 years ago
15

At the same instant that a 0.50-kg ball is dropped from 25m above Earth,? At the same instant that a 0.50-kg ball is dropped fro

m 25m aboveEarth, a second ball, with a mass of 0.25 kg, is thrown straight upward from Earth’ssurface with an initial speed of 15m/s. They move along nearby lines and pass each other without colliding.At the end of 2.0 s the velocity of the center of mass of the two-ball system is:

Physics
1 answer:
fiasKO [112]3 years ago
6 0
I hope it is clearly visible.. Velocity of the center of mass of 2-ball system is - 11.54m/s. Minus indicates, velocity direction is in downward direction.

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Which changes to observed time and length occur when objects approach the speed of light?
mixas84 [53]

Answer:

Time moves slower and length decreases.

Explanation:

3 0
4 years ago
The flash unit in a camera uses a special circuit to "step up" the 3.0 V from the batteries to 290 V, which charges a capacitor.
Margaret [11]

Answer:

Therefore the capacitance of the capacitor is 2.38 * 10⁻⁵F

Explanation:

We apply the concepts related to Power and energy stored in a capacitor.

By definition we know that power is represented as

P = \frac{E}{t}

Where,

E= Energy

t = time

to find the Energy we have,

E = P*t

P = 1*10^5Wt = 10*10^{-6}s

E= (1*10^5)(10*10^{-6})E = 1.0J

With the energy found we can know calculate the Capacitance in a capacitor through the energy for capacitor equation, that is

E=\frac{1}{2}CV^2

C = \frac{2E}{V^2}\\\\\\\frac{2\times 1 }{290^2 - 3^2\\} \\= 2.38 \times 10^-^5F

Therefore the capacitance of the capacitor is 2.38 * 10⁻⁵F

3 0
3 years ago
Read 2 more answers
Plz help
Nikolay [14]

The answer to this is C

7 0
3 years ago
Hi Friends!<br><br>please help me with these questions!<br><br>SUBJECT: Chemistry, Physics,Biology
satela [25.4K]

Answer:

q.1 : Air near candle gets heated up and after this it rises by convection so the thermometer B will receive more heat than the thermometer A So, according to the given condition thermometer B will show a greater rise in temperature.

q.2 : x is the pure sample of compound . y is the pure sample of element . z is the mixture of different elements

q.3 : the saliva contains an enzyme salivary amylase (ptyalin) which converts starch in roti into maltose, isomaltose and small dextrins called a-dextrin.

6 0
3 years ago
6. If a force of 3000 N is needed to accelerate a car to 3 m/s2, what is the mass of<br> the car?
evablogger [386]

Answer:

<h2>1000 kg</h2>

Explanation:

The mass of the car can be found by using the formula

m =  \frac{f}{a}  \\

f is the force

from the question we have

m =  \frac{3000}{3}  = 1000 \\

We have the final answer as

<h3>1000 kg</h3>

Hope this helps you

4 0
3 years ago
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