All categories

3 years ago

A 4-kg ball has a momentum of 12 kg∙m/s. what is the ball's speed?

Physics

2 answers:

Nookie1986 [14]3 years ago

8 0

Momentum= 12kgm/s
mass=4 kg
so,speed=momentum/mass=12/4=3m/s

Karolina [17]3 years ago

7 0

M= 4kg
v= ?
momentum = Mv
so
12kgms-¹ = 4kg×v
v= 12÷4 = 3ms-¹

You might be interested in

Describe the magnetic field lines around a bar magnet

Sophie [7]

The lines can be traced out with a compass. The needle is like a permanent magnet and the north indicator is the north end of a magnet.

6 0

3 years ago

Read 2 more answers

Helowo there im dieing someone help

worty [1.4K]

Helowo there, dieing!

You call 911 or let your death becomeith of you

Have fun!

7 0

3 years ago

Read 2 more answers

A non-reflective coating that has a thickness of 198 nm (n = 1.45) is deposited on top of a substrate of glass (n = 1.50). What

spin [16.1K]

Answer:

The wavelength is $\lambda_ 1 = 574.2 nm$

Explanation:

From the question we are told that

The thickness is $t = 198 nm = 198 *10^{-9 }\ m$

The refractive index of the non-reflective coating is $n_m = 1.45$

The refractive index of glass is $n_g = 1.50$

Generally the condition for destructive interference is mathematically represented as

$2 * n_m * t * cos (\theta) = n * \lambda$

Where $\thata$ $\theta$ is the angle of refraction which is 0° when the light is strongly transmitted

and n is the order maximum interference

$\lambda = \frac{2 * n * t * cos (\theta )}{n}$

at the point n = 1

$\lambda _1 = \frac{2 * 1.45 * 198*10^{-9} * cos (0 )}{1}$

$\lambda_1 = 574.2 *10^{-9}$

$\lambda_1 = 574.2 nm$

at n =2

$\lambda _2 = \frac{\lambda _1 }{2}$

$\lambda _2 = \frac{574.2*10^{-9} }{2}$

$\lambda _2 = 2.87 1 *10^{-9} \ m$

$\lambda _2 = 287. 1 nm$

Now we know that the wavelength range of visible light is between

$390 \ nm \to 700 \ nm$

So the wavelength of visible light that is been transmitted is

$\lambda_ 1 = 574.2 nm$

6 0

4 years ago

A car has an initial velocity of 10m/s. It accelerates at a rate of 2m/s2 until it reaches 30m/s. How far does it travel and for

Anna [14]

Answer:

acceleration=(v final-vinitial)/time

a=(vf-vi)/t

2=(30-10)/t

2=20/t

t=20/2=10 seconds

distance=v0t+at²/2

d=10 x 10+ 2x 10²/2=100+100= 200 m

Explanation:

7 0

2 years ago

At what time did time begin<br><br><br> 50 points :)

USPshnik [31]

Answer:

According to the standard big bang model of cosmology, time began together with the universe in a singularity approximately 14 billion years ago.

Explanation: the big bang

8 0

2 years ago

Read 2 more answers