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4 years ago

A 250KG ROCKET HAS 1,953,125 JOULES OF ENERGY. HOW FAST IS ITMOVING?

Physics

1 answer:

UNO [17]4 years ago

6 0

Answer:

cnbv gncvjhmv

Explanation:

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A car of weight 6,400 N has four wheels. Each wheel has an area of

Natasha2012 [34]

Answer:

80N/cm^2

Explanation:

Given data

A car of weight 6,400N

Area= 80cm^2

The weight is distributed evenly on the 4 wheels

hence 6400/4

=1600 N

We know that

Pressure = force/Area

Pressure= 1600/80

Pressure= 20 N/cm^2

For the four wheels, the pressure is

=20*4

=80N/cm^2

6 0

3 years ago

Two speakers C & D are driven in step at 600 Hz by the same audio oscillator. these speakers both start out at 5.0 m from th

Mice21 [21]

Answer:

option B

Explanation:

given,

frequency of the speaker = 600 Hz

speed of sound = 340 m/s

wavelength = ?

$\lambda = \dfrac{v}{f}$

$\lambda = \dfrac{340}{600}$

$\lambda = 0.567 m$

for second destructive interference,

the path difference,

$d =(2k-1)\dfrac{\lambda}{2}$

k = 2

$d =(2\times 2-1)\dfrac{\lambda}{2}$

$d =\dfrac{3\lambda}{2}$

$d =\dfrac{3\times 0.567}{2}$

d = 0.86 m

the correct answer is option B

3 0

4 years ago

David lifts a book 1.2 meters from the floor to the top of his desk. If the book weighed 0.50 kg, what is the gravitational pote

Anika [276]

Answer:

5.886 J

Explanation:

Given:

The mass of the book is, $m=0.5$ kg

Height of lift is, $\Delta h=1.2$ m

Acceleration due to gravity is, $g=9.81$ m/s²

Now, gain in gravitational potential energy is a function of change in position and is given as:

$\Delta PE=mg\Delta h$

Here, $\Delta PE$ is the change in gravitational potential energy.

Plug in 0.5 kg for $m$ , 9.81 for $g$ and 1.2 for $\Delta h$ . Solve for $\Delta PE$

$\Delta PE=0.50\times 9.81\times 1.2=5.886\ J$

Therefore, the gain in gravitational energy of the book is 5.886 J.

7 0

4 years ago

To travel across the diameter of the Milky Way galaxy, traveling at light speed, it would take:

horsena [70]

Answer:

200000 years

Explanation:

The disk of our home galaxy – the Milky Way – is bigger than we previously thought. A new study shows it would take 200,000 years for a spaceship traveling at the speed of light to go across the entire galaxy.

8 0

3 years ago

What is the mass of an object that requires a force of 30 N to accelerate at a rate of 5 m/sec2 ?

Anastaziya [24]

M=F/A
Which means 30 divided by 5 m/s is 6kg(mass)

8 0

3 years ago

A 250KG ROCKET HAS 1,953,125 JOULES OF ENERGY. HOW FAST IS ITMOVING?​

A 250KG ROCKET HAS 1,953,125 JOULES OF ENERGY. HOW FAST IS ITMOVING?