Answer:
-2250 N
Explanation:
From the question,
Using.
F = m(v-u)/t .................. Equation 1
Where F = Average force the bat apply to the ball, m = mass of the ball, v = final velocity of the ball, u = initial velocity of the ball, t = time.
Given: m = 0.15 kg, v = -50 m/s(reversed direction), u = 40 m/s, t = 6.0×10⁻³ s = 0.006 s.
Substitute into equation 1
F = 0.15(-50-40)/0.006
F = 0.15(-90)/0.006
F = -2250 N.
The force is negative because it opposes the initial motion of the ball.
Hence the bat average force = -2250 N
Answer:
3.34kg/min²
Explanation:
Convert to the same unit of time:
120kg/h = 2kg/min
10s = 0.6min
acceleration = change in velocity / time
a = 2/0.6 = 3.34
Change unit if needed!
Answer:
Explanation:
Diffraction is observed when a wave is distorted by an obstacle whose dimensions are comparable to the wavelength. The simplest case corresponds to the Fraunhofer diffraction, in which the obstacle is a long, narrow slit, so we can ignore the effects of extremes.
This is a simple case, in which we can use the Fraunhofer single slit diffraction equation:
Where:
Solving for λ:
Replacing the data provided by the problem:
Answer:
The apparent weight is less than that of the real weight because of buoyancy.
Explanation:
Buoyancy is the upward thrust that is experienced by the object that is either fully or partially immersed in the object. The weight of the immersed object will be equal to the mass of the liquid that is displaced by the object. Buoyancy can be calculate based on Archimedes's Principle. Buoyancy also acts in the air, the normal force is reduced than the force of gravity. Buoyancy is the ability to float in liquid as well as in air. This floating happens when various forces acts on the opposite direction. The direction of the force will always remain upwards.
Good morning,
the answer you r looking for is (B) electromagnetic radiation.
hope i helped