Predict/Calculate Weighing a Block on an Incline A wedge of mass m, is firmly attached to the top of a scale as shown in Figure 9-47 . The inclined surface of the wedge makes an angle θ with the horizontal Now a block of mass m 2 is placed on the inclined surface of the wedge and allowed to accelerate without friction down the slope (a) Show that the reading on the scale while the block slides is ( m 1 + i 2 cos 2 θ) g (b) Explain why the reading on the scale is less than ( m 1 + m 1 ) g . (c) Show that the expression in part (a) gives the expected results for θ = 0 and θ = 90°. Figure 9-47 Problem 87
Predict/Calculate Weighing a Block on an Incline A wedge of mass m, is firmly attached to the top of a scale as shown in Figure 9-47 . The inclined surface of the wedge makes an angle θ with the horizontal Now a block of mass m 2 is placed on the inclined surface of the wedge and allowed to accelerate without friction down the slope (a) Show that the reading on the scale while the block slides is ( m 1 + i 2 cos 2 θ) g (b) Explain why the reading on the scale is less than ( m 1 + m 1 ) g . (c) Show that the expression in part (a) gives the expected results for θ = 0 and θ = 90°. Figure 9-47 Problem 87
Predict/Calculate Weighing a Block on an Incline A wedge of mass m, is firmly attached to the top of a scale as shown in Figure 9-47. The inclined surface of the wedge makes an angle θ with the horizontal Now a block of mass m2 is placed on the inclined surface of the wedge and allowed to accelerate without friction down the slope (a) Show that the reading on the scale while the block slides is
(m1 + i2cos2θ)g
(b) Explain why the reading on the scale is less than (m1 + m1)g. (c) Show that the expression in part (a) gives the expected results for θ = 0 and θ = 90°.
An electromagnetic wave is traveling through vacuum in the positive x direction. Its electric field vector is given by E=E0sin(kx−ωt)j^,where j^ is the unit vector in the y direction. If B0 is the amplitude of the magnetic field vector, find the complete expression for the magnetic field vector B→ of the wave.
What is the Poynting vector S(x,t), that is, the power per unit area associated with the electromagnetic wave described in the problem introduction?
Give your answer in terms of some or all of the variables E0, B0, k, x, ω, t, and μ0. Specify the direction of the Poynting vector using the unit vectors i^, j^, and k^ as appropriate. Please explain all steps
Another worker is performing a task with an RWL of only 9 kg and is lifting 18 kg, giving him an LI of 2.0 (high risk).
Questions:What is the primary issue according to NIOSH?Name two factors of the RWL that could be improved to reduce risk.If the horizontal distance is reduced from 50 cm to 30 cm, how does the HM change and what effect would it have?
Two complex values are z1=8 + 8i, z2=15 + 7 i. z1∗ and z2∗ are the complex conjugate values.
Any complex value can be expessed in the form of a+bi=reiθ. Find r and θ for z1z2∗. Find r and θ for z1/z2∗? Find r and θ for (z1−z2)∗/z1+z2∗. Find r and θ for (z1−z2)∗/z1z2∗ Please explain all steps, Thank you
Biology: Life on Earth with Physiology (11th Edition)
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