PHYSICS HIGH SCHOOL

An object at rest has no net force acting on it.
True or False​

Answers

Answer 1
Answer: That’s True bc an unbalanced force would need to keep and object in motion at a constant velocity.
Answer 2
Answer:

Answer:

True

Explanation:

The object is at rest, which means it's not moving, so there is no net force on it, according to Newton's First Law.

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1. Calculate the resistance of a 12v, 20-amp circuit.

Answers

Answer:

R = 0.6 ohms

Explanation:

We have,

Voltage of the circuit is 12 V

Current flowing in the circuit is 20 A

It is required to find the resistance of the circuit. Ohm'slaw gives the relationship between voltage, current and resistance. It is given by :

V=IR

R = resistance

R=(V)/(I)\n\nR=(12)/(20)\n\nR=0.6\ \Omega

so, the resistance of the circuit is 0.6 ohms.

What are some solutions to global temperature changes?
help asap​

Answers

Answer:

Power your home with renewable energy.

Weatherize, weatherize, weatherize.

Invest in energy-efficient appliances.

Reduce water waste.

Actually eat the food you buy—and make less of it meat.

Explanation:

The blood pressure in human body is greater at the feet than the brain

Answers

Blood needs to be pumped at a more constant rate travelling further than the brain, as the heart is nearer to the brain. 
yes,
The height  of the blood column at the feet is large as compared to at the brain . Hence, blood pressure is more at feet than at the brain.

If you had a planet to choose from to live in what would it be?

Answers

I personally would live on Mars cuz that is red cuz
I would personally like to live on mars because it is like our temperature, but a little bit colder.

Convert the following:a)2500 kilogram into gram.
b)335 hours into seconds.
c)1 day into seconds.​

Answers

Explanation:

A) 1 kg = 1000g

2500kg = 2500000g

B 1 hour = 3600 sec

335 hour = 1206000sec

C 1day = 24 hours

1 hour = 3600 sec

24 hours = 86400sec

Answers:

a.2500000grams

B.1206000seconds

c.86400seconds.

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As a moving object's velocity decreases, its momentum decreases.Please select the best answer from the choices provided
T
F

Answers

Explanation :

The momentum of an object is defined as the product of its mass and the velocity with which it is moving. It is denoted as p.

Mathematically, it is written as :

p=mv

m is the mass of an object

v is the velocity

So, it is clear that the momentum of an object is directly proportional to its velocity.

The statement "as a moving object's velocity decreases, its momentum decreases" is absolutely true.
From the choices provided, the better answer is 'T'. The other one does not apply.
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