Find the x-component and y-component of 65.0 and 15.3 PLEASE HELPPPP

The initial kinetic energy imparted to a 0.020 kg bullet is 1200 J. (a) Assuming it

Lilit [14]

Answer:

(a) Power= 207.97 kW

(b) Range= 5768.6 meter

Explanation:

Given,

Mass of bullet, $m=0.02 kg$

Kinetic energy imparted, $K=1200 J$

Length of rifle barrel, $d=1 m$

(a)

Let the speed of bullet when it leaves the barrel is $v$ .

Kinetic energy, $K=\frac{1}{2} mv^{2}$

$v=\sqrt{\frac{2K}{m} }$

$=\sqrt{\frac{2\times1200}{0.02} }$

$=346.4m/s$

Initial speed of bullet, $u=0$

The average speed in the barrel, $v_a_v_g=\frac{u+v}{2}$

$=\frac{0+346.4}{2} \\=173.2 m/s$

Time taken by bullet to cross the barrel, $t=\frac{d}{v}$

$=\frac{1}{173.2}\\ =0.00577 second$

Power, $P_a_v_g=\frac{W}{t}$

$=\frac{1200}{0.00577} \\=207.97kW$

(b)

In projectile motion,

Maximum height, $H_m=\frac{v^2\sin^2\theta}{2g} \\$

Range, $R=\frac{v^2\sin2\theta}{g}$

given that, $H_m=R$

then, $\frac{v^2\sin^2\theta}{2g}=\frac{v^2\sin2\theta}{g}\\\sin^2\theta=2\sin\theta\cos\theta\\\\\tan\theta=4\\\theta=\tan^-^14\\\theta=75.96^0\\R=\frac{v^2\sin2\theta}{g}\\=\frac{346.4^2\times\sin(2\times75.96)}{9.8}\\5768.6 meter$

5 0

3 years ago

Why does magnet 5 float above magnet 4

4vir4ik [10]

Because the same sides(N and N, or S and S) are facing each other in magnet 4 and 5. Also in magnet 2 and 3.

8 0

4 years ago

An area with excess electrons has a net _____ charge; an area with a deficit of electrons has a net _____ charge. Question 10 op

Ivenika [448]

Answer:

negative, positive

Explanation:

A we know that the electrons have a negative charge.

So, when a body has some excess electrons, it means it has negative charge.

When a body has an deficiency of eletrons, it means it gains a positive charge.

An area with excess electrons has a net _negative__ charge; an area with a deficit of electrons has a net _Positive____ charge.

8 0

4 years ago

2. As the density of the medium increases, the speed of light

grin007 [14]

Answer: B

Explanation: The density of a material affects the speed that a wave will be transmitted through it. In general, the denser the transparent material, the more slowly light travels through it. Glass is denser than air, so a light ray passing from air into glass slows down.

4 0

4 years ago

What happens to a car that experiences an increase in kinetic energy

Allisa [31]

Answer:

Your moving vehicle has kinetic energy; as you increase your vehicle's speed, your vehicle's kinetic energy increases. The greater your vehicle's kinetic energy, the greater the effort that will be required to stop the vehicle.

Explanation:

I hope this explained up above. Have a great dayyyy:)

4 0

3 years ago

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