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3 years ago

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What is the starting and final energy for a battery?

1 answer:

EleoNora [17]3 years ago

8 0

Electrical energy is the starting and final energy of a battery

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maks197457 [2]

Hey there!
Alright, it looks like you've got the second question on the top right, but I can't figure out the answer you've got for the first.
Using Newton's Second Law Of Motion, we have:
F = ma
We plug in our values:
F = 5(1)
That would give us 5 Newtons of force.
For the last one:
Even if two balls are given the same acceleration, the determining factor is <em>weight.</em> If a ball is lighter, it needs less acceleration to go faster. If it's larger, it needs more to make it go at that same speed. That's why that 5 newtons makes sense because it's 5 kilograms as opposed to 0.6 kilograms. It's heavier, and needs more force.
Hope this helped!

8 0

3 years ago

A car of mass 940.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 42.5 km/hr (11.8 m/s),

MAVERICK [17]

Answer:

0.39 $m/s^2$

Explanation:

Parameters given:

Mass of car, m = 940 kg

Speed of car, v = 11.8 m/s

Power supplied by engine, P = 4300 W

To get the acceleration, we must define the relationship between Power and velocity.

Power, P, is given in terms of velocity, v, as:

P = F * v

where F = force

This is because Power is given as:

$P = \frac{E}{t} \\\\\\P = \frac{F*d}{t} \\\\\\=> P = F * v$

(where E = energy. t = time taken, d = distance moved)

Force, F, is given as:

F = m*a

Therefore, Power will be:

P = m * a * v

Acceleration, a, will then be:

$a = \frac{P}{m*v}$

$a = \frac{4300}{940 * 118} \\\\\\a = 0.39 m/s^2$

The acceleration of the car at that time is 0.39 $m/s^2$

4 0

3 years ago

Read 2 more answers

What provides the centripetal force needed to keep Earth in orbit?

laiz [17]

option C ............

8 0

3 years ago

Read 2 more answers

Which watch is more preferable for the measurement of time among pendulum, quartz and atomic watch

kolbaska11 [484]

Answer:

atomic clock is the answer

3 0

3 years ago

Read 2 more answers

Two tuning forks are sounded at the same time. which tuning forks will give rise to a beat frequency of 30 hz when sounded toget

SOVA2 [1]

Answer:

300 Hz and 240 Hz

Explanation:

Beat frequency formed by the tuning fork is given by :

$f_{beat}=f_1\pm f_2$

Here, the beat frequency, $f_{beat}=30\ Hz$

The frequency of a tuning fork, $f_2=270\ Hz$

If $f_{beat}=f_1+f_2$

$f_1=f_{beat}-f_2$

$f_1=30-270$

$f_1=240\ Hz$

If $f_{beat}=f_1-f_2$

$f_1=f_{beat}+f_2$

$f_1=30+270$

$f_1=300\ Hz$

So, the tuning forks will give rise to a beat frequency are 240 Hz and 300 Hz. Hence, this is the required solution.

6 0

3 years ago