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givi [52]
3 years ago
7

A solid ball is rolling along a horizontal surface at 3.7 m/s when it encounters an upward

Physics
1 answer:
lys-0071 [83]3 years ago
4 0

Answer:

h = 0.697 [m]  

Explanation:

To solve this problem we must use the energy conservation theorem, where it tells us that kinetic energy is converted to potential energy or vice versa.

E_{kinet}=E_{pot}

where:

Ekinet = kinetic energy [J]

Epot = potential energy [J]

\frac{1}{2}*m*v^{2}=m*g*h\\0.5*(3.7)^{2} =9.81*h\\h =(6.845)/9.81\\h = 0.697 [m]

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250 mL 0.1 M HCl solution is mixed with 250 mL
pishuonlain [190]

Answer:

The concentration of OH⁻ in the mixture is 0.05 M

Explanation:

The reaction of neutralization between HCl and NaOH is the following:

H⁺(aq) + OH⁻(aq) ⇄  H₂O(l)

The number of moles of HCl is:

n_{HCl} = C*V = 0.1 mol/L*0.250L = 0.025 moles

Similarly, the number of moles of NaOH is:

n_{NaOH} = C*V = 0.2 mol/L*0.250L = 0.05 moles

Now, from the reaction of HCl and NaOH we have the following number of moles of NaOH remaining:

n_{NaOH} = 0.05 moles - 0.025 moles = 0.025 moles

Finally, the concentration of OH⁻ in the mixture is:

C =\frac{n_{NaOH}}{V_{T}}=\frac{0.025 moles}{0.250*2 L} = 0.05 moles/L

Therefore, the concentration of OH⁻ in the mixture is 0.05 M.

I hope it helps you!

8 0
3 years ago
10 advantages of friction
kogti [31]

Answer:

1. it helps to change the direction.

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4. helps in changing one form of enegry to another form. eg when we rub our hands we feel heat energy.

5. it opposites the force.

6. it helps us to change shape of objects.eg we roll the dough to make it roti.

7. it changes the state of body from rest motion.eg when we push any obj from inclined plane it moves.

i all know is just 7..

5 0
3 years ago
a car of mass 1,000 kilograms is moving initially at the speed of 22 meters/second. when the brakes are applied, it takes the ca
Evgen [1.6K]

It i believe it would be 7.3 × 10∧3.

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5 0
3 years ago
How do you start the game of floor hockey
babunello [35]

Answer:

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4 0
3 years ago
Measuring Current as a Function of Voltage with a 20 Q Resistor
ki77a [65]

Answer:

<u>Resistance at 25 V</u>

Explanation:

(10)

(A)

10

20

100

200

Determining Current in a Parallel Circuit

Observed

Resistor Set

(0)

Total

Resistance

Calculated

Current

(A)

Current

(A)

(10)

20, 20, 20

20, 20, 200

<h3>Voltage needed to raise current to 3.75 A (20, 20, 200 resistor set):</h3>

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Table B

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(A)

Current Experimental

(A)

Observed Current

through Each Resistor

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Power Usage per Bulb

(

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