PHYSICS HIGH SCHOOL

If a fully loaded shopping cart has a head-on collision with an empty cart both moving at the same speed toward each other, which cart experiences the greater force? The greater impulse? The greater change in momentum? The greater acceleration?

Answers

Answer 1

Answer:

Answer:

impact- equal

impulse- equal

momentum- equal

acceleration- the empty cart

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Objects that have value in themselves and that are also used as money is the definition for _____.a. commodity money
b. representative money
c. fiat money
d. money

Answers

Answer: The correct answer for the blank is- a. commodity money.

Commodity money can be described as a form of currency, which has an intrinsic value ( that is value of its own) as well as value (in the form of money) in their use.

For Example- gold, silver, grains serve as commodity money.

Objects that have value in themselves and that are also used as money is the definition for commodity money. Hope this helped :)

When a woman stands with two feet on a scale, the scale reads 280 N. When she lifts one foot, the scale reads A. less than 280 N. B. more than 280 N. C. 280 N.

Answers

The right answer is 280 N.

What is total weight on the scale?

When a woman stands with two feet on a scale, the scale reads 280 N and when she lifts one foot, the scale also reads 280 N because the weight of the other leg also comes on the one leg.

First, the whole weight of the body depends on two feet but when the second feet is lifted, the weight of the whole body including the lifted feet comes on the single feed so we can conclude that the right answer is 280 N

Learn more about scale here: brainly.com/question/2826496

c is the correct answer

How much voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms ofresistance?

Answers

Voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance will be 50 V

What is ohm's law ?

Ohm's law is a law that states that the voltage across a resistor is directly proportional to the current flowing through the resistance

using ohm's law

V = IR

V = voltage in a circuit = ?

I = current = 10 A

R = Total resistance in the circuit = 5 ohm

V = IR

= 10 A * 5 ohm

= 50 V

voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance will be 50 V

learn more about ohm's law

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$U = R * I \rightarrow U = 10 * 5 = 50 V$

Train is traveling at an initial velocity of 68.325m/s. After 23.75 seconds it speeds up to a final velocity of 79.32m/s. What is the train's acceleration during this time

Answers

So,

We know that:
$acceleration = ( final\ velocity\ -\ initial\ velocity)/(time)$

Plug in the values.
$acceleration = (79.32 m/s^(2)\ -\ 68.325m/s^(2))/(23.75 secs)$
$acceleration = (10.995m/s^(2) )/(23.75 secs)$
$acceleration = 0.4629 m/s^(2)$

Form of energy that exhibits wavelength behavior as it travels through space. Example: Mircrowave rays, U.V. rays.

Answers

That's "electromagnetic" energy. It also includes radio, heat, light, and X-rays.

I just need the equation on how to do it. I'm so lost :'( help please!!!!!!

Answers

The '120-V' is what we in the engineering profession call a "red herring".
You don't need it to solve the problem. The answer would be the same
if the blow drier were operating from a 440-V outlet, or any other kind
(just as long as the blow drier is designed to operate on whatever voltage
it was plugged into.)

Power = 750-W = 0.75 kW
Time = 13 minutes = 13/60 of an hour
Energy = (power) x (time) = (0.75 kW) x (13/60 of an hour) = 0.1625 kWh

Cost per unit of energy = $ 0.1 per kWh
Total cost = (energy) x (cost per unit of energy)

Total cost = (0.1625 kWh) x ($ 0.1 per kWh) = $ 0.01625 = 1.625 cents
===============================

The other answer has his significant figures correct, but shows what happens
when you don't carry your units all the way through.

$750W=0.75 kW\n \n 0.75*(13)/(60)=0.1625 \ kWh\n \n \boxed{0.1625*0.10=\$ \ 0.1625}$

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