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aleksklad [387]

3 years ago

11

Give one example of a scientific discovery that has both advantages and disadvantages and discuss the tradeoffs involved in use

of the discovery.

1 answer:

dimulka [17.4K]3 years ago

4 0

Atomic bomb:
Pro: It helps keep countries at peace due to fear of destruction
Con: Very deadly and can destroy many people's lives.

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A backpack has a mass of 8 kg. It is lifted and given 54.9 J of gravitational potential energy. How high is it lifted? Accelerat

sweet [91]

Potencial Energy=hma
Where
Potencial Energy =E= 54.9J
h=?
m=8kg
a=9.8m/s^2
You need to know that 1 J=1(kgm^2)/s^2

Isolate h=E/(ma)
h=(54.9)/(8*9.8)

8 0

3 years ago

Read 2 more answers

An Arrow (0.5 kg) travels with velocity 60 m/s to the right when it pierces an apple (1 kg) which is initially at rest. After th

Rom4ik [11]

Answer:

Velocity after collision will be 20 m/sec

Explanation:

We have given mass of arrow $m_1=0.5kg$

Mass of arrow $v_1=60m/sec$

Mass of apple $m_2=1kg$

Apple is at rest so velocity of apple $v_2=0m/sec$

According to conservation of momentum

Momentum before collision is equal to momentum after collision

$m_1v_1+m_2v_2=(m_1+m_2)v$

$0.5\times 60+1\times 0=(0.5+1)v$

$1.5v=30$

v = 20 m/sec

5 0

3 years ago

What are people words in english

mina [271]

Answer: Plenty

Explanation:

some words are Hi, Banana, Dude and many more

7 0

3 years ago

If an atom has a mass number of 23, which of the following is always true?

WINSTONCH [101]

The number of protons in the nucleus does not equal the number of nuetrons

6 0

3 years ago

A wire carrying a 2-A current is placed at an angle of 60° with the respect to a magnetic field of strength 0.2 T. If the length

Anvisha [2.4K]

Answer:

0.208 N

Explanation:

Parameters given:

Current, I = 2A

Angle, A = 60°

Magnetic field strength, B = 0.2 T

Length, L = 0.6 m

Magnetic force is given as:

F = I * L * B * sinA

F = 2 * 0.6 * 0.2 * sin60

F = 0.24 * sin60.

F = 0.208 N

8 0

3 years ago

Read 2 more answers