Answer:
The block+bullet system moves 4 m before being stopped by the frictional force.
Explanation:
Using the law of conservation of llinear momentum and the work energy theorem, we can obtain this.
According to Newton's second law of motion
Momentum before collision = Momentum after collision
Momentum before collision = (0.02×400) + 0 (stationary block)
Momentum before collision = 8 kgm/s
Momentum after collision = (2+0.02)v
8 = 2.02v
v = 3.96 m/s.
According to the work-energy theorem,
The kinetic energy of the block+bullet system = work done by Friction to stop the motion of the block+bullet system
Kinetic energy = (1/2)(2.02)(3.96²) = 15.84 J
Work done by the frictional force = F × (distance moved by the force)
F = μmg = 0.2(2.02)(9.8) = 3.96 N
3.96d = 15.84
d = (15.84/3.96) = 4 m
Answer:
Nuclear fusion reactions produce more energy.( basic difference)
Explanation:
Nuclear fusion reactions are different from nuclear fusion reactions :- In nuclear fission one heavy and unstable nuclear breaks into two parts(smaller) and produce energy( very high energy than normal reaction). whereas in nuclear fusion two small and unstable nuclei fuse and produce very high amount of energy( even higher than nuclear fusion).
The y -component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum
- Ey = 375•Cos[kx - (2.20 × 10¹⁴t)]
- Speed of light
- c = 3×10^8m/s
- hat is the wavelength?
- Generally,
- The wavelength of electromagnetic wave is give as
- Ey = Emax•Cos(kx—wt)
- k = 2π/λ
- w = 2πf
- Ey = Emax•Cos(2πx/λ—2πft)
- Comparing this to the wave equation given,
- We notice that,
- 2πx/λ = kx
- Also,
- 2.20 × 10¹⁴t = 2πft
- t cancels out
- 2.20 × 10¹⁴ = 2πf
- f = 2.20 × 10¹⁴ / 2π
- f = 3.5 × 10¹³ Hz
- Since we are given that
- c = 3×10^8m/s
- Then, using relationship between c, v and λ.
- c = fλ.
- λ. = c/f
- λ. = 3×10^8 / 3.5 ×10¹³
- λ. = 8.57 × 10^-6m
- λ. = 8.57 μm
- The wavelength of the electromagnetic wave is 8.57 micro meter (8.57 μm)
<h3>What is
electromagnetic wave?</h3>
In terms of science, electromagnetic radiation (EMR) is made up of electromagnetic (EM) field waves that travel over space while carrying radiant electromagnetic energy. It consists of X-rays, gamma rays, microwaves, infrared, visible light, ultraviolet, and radio waves. These waves are all a component of the electromagnetic spectrum.
Electromagnetic waves, which are synchronized oscillations of the electric and magnetic fields, are the traditional form of electromagnetic radiation. Due to the periodic alteration of the electric or magnetic field, electromagnetic radiation or waves are produced. Different wavelengths of the electromagnetic spectrum are created depending on the manner in which this periodic change takes place and the power generated. Electromagnetic waves move at the speed of light, typically abbreviated as c, in a vacuum. The oscillations of the two fields are perpendicular to one another and perpendicular in homogeneous, isotropic media.
To learn more about electromagnetic wave from the given link:
brainly.com/question/8773290
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We have that the Velocities is mathematically given as
a)v=2.8e5m/s
b)v_2=3.11e5m/s
From the question we are told
- Consider the parallel-plate <u>capacitor </u>shown in the figure.
- The plate separation is 1.8 mm and the the electric field inside is 23 N/C.
- An electron is positioned halfway between the plates and is given some initial velocity, vi.
<h3>
Velocity</h3>
Generally the equation for the workdone is mathematically given as
a)
v=2.8e5m/s
b)
applying work
v_2=3.11e5m/s
For more information on Velocity visit
brainly.com/question/7359669
