Seconds/Division
An oscilloscope measures time-varying waveform. Electrical input signal is concerted into detectable trace on a screen by converting electricity into light. Time period is plotted along the x -axis as the horizontal component. The center vertical line (y-axis) represents the voltage.
B. 60°C
C. 60°C
D 70°C
E. 80°C
b. it has mass
c. it is changing position
d. it has a reference point
a. 1/2 Potential Energy, 1/2 Kinetic Energy
b. 1/2 Potential Energy, 0 Kinetic
c. 100 Potential Energy
Point B:
a. 1/4 Potential, 3/4 Kinetic
b. 100 Kinetic, 0 Potential
b. 1/2 Potential, 1/2 Kinetic
Point C:
a. 1/2 Potential, 1/2 Kinetic
b. 3/4 Potential, 1/4 Kinetic
c. 100 Potential, 0 Kinetic
Answer
Apply this kinematics equation for the particle's vertical motion:
D = Vt + 0.5At²
D = vertical distance traveled, t = time, V = initial vertical velocity, A = vertical acceleration
Given values:
D = 49m
V = 34.3m/s
A = -9.81m/s²
Plug in and solve for t:
49 = 34.3t - 4.905t²
4.905t² - 34.3t + 49 = 0
Use the quadratic roots formula to find the values of t:
t ≈ 2, 5
The particle reaches a height of 49m at t = 2s & t = 5s
A) lever
B) screw
C) inclined plane
D) block and tackle (pulley)
Answer:
d
Explanation: