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4 years ago

30 POINTS!

Physics

2 answers:

photoshop1234 [79]4 years ago

4 0

"D is correct answer." Velocity is the displacement of an object during a specific unit of time. "Hope this helps!" "Have a great day!" "Thank you for posting your question!"

amm18124 years ago

3 0

Answer:

Explanation:

VELOCITY!

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6. As the sky diver's fall the______energy is converted into _______.

notka56 [123]

Answer: B

D makes no sense because energy is created so we can remove that. C also makes no sense because if energy is not created how did it get destroyed if there's no energy in the first place. This leaves us with a and B the correct answer is B because energy is created and cannot be destroyed.

3 0

3 years ago

What is the time constant of a series circuit where the capacitor is 0.330μF and the resistor is 10Ω ?

PtichkaEL [24]

Answer:

$\tau=3.3*10^{-6}s$

Explanation:

Take at look to the picture I attached you, using Kirchhoff's current law we get:

$C*\frac{dV}{dt}+\frac{V}{R}=0$

This is a separable first order differential equation, let's solve it step by step:

Express the equation this way:

$\frac{dV}{V}=-\frac{1}{RC}dt$

integrate both sides, the left side will be integrated from an initial voltage v to a final voltage V, and the right side from an initial time 0 to a final time t:

$\int\limits^V_v {\frac{dV}{V} } =-\int\limits^t_0 {\frac{1}{RC} } \, dt$

Evaluating the integrals:

$ln(\frac{V}{v})=e^{\frac{-t}{RC} }$

natural logarithm to both sides in order to isolate V:

$V(t)=ve^{-\frac{t}{RC} }$

Where the term RC is called time constant and is given by:

$\tau=R*C=10*(0.330*10^{-6})=3.3*10^{-6}s$

3 0

3 years ago

An object cannot remain at rest unless which of the following holds?

katen-ka-za [31]

Answer:

a. The net force acting on it is zero.

3 0

4 years ago

Read 2 more answers

9. A child standing on a bus remains still when the bus is at rest. When the bus moves forward and then slows down, the child co

marin [14]

I think the answer is C

3 0

4 years ago

A 1.00 kg, 2.00 kg and 5.00 kg object are released from the same height at the

Lady bird [3.3K]

Answer:

George

Explanation:

George is correct because no matter the mass all objects will hit the ground at once because each has a certain amount of gravity needing them to pull it down for example your weight the bigger the person the heavier.

7 0

3 years ago