Molecular Physics | Thermodynamics Answers

Find the range of an arrow that leaves the box at 50 m/s at ang angle of 50o above the horizontal?

John kicks the ball, and the ball does a projectile motion with an angle of 53o to horizontal with an initial velocity of 10 m/s. What is (a) its maximum height, (b) its maximum distance, and (c) its hangtime?

A boy pushes a box with a mass of 13 kg on a horizontal surface with a constant speed of 2 m/s. The coefficient of kinetic friction between the box and the surface is 0.20. What horizontal force must be applied by the boy to maintain the motion?

Sylvia and Jadon now want to work a problem. Imagine a puck of mass 0.5 kg moving as in the simulation. Suppose that the tension in the string is 2.0 N, and that the radius of its circular path is 0.9 m. What will Jadon and Sylvia find for the tangential speed of the puck?

__ m/s

Now the pair decide to solve a homework problem to check their understanding.

The densest known element is osmium with a density of 𝜌 = 22.4 g/cm³. Suppose two small spheres of osmium with radii 2.60 cm are in contact with each other. Find the gravitational force of attraction between them, given that G = 6.67 ✕ 10⁻¹¹ N · m²/kg².

Recall that 𝜌 = mass/volume

 and V_sphere = 4/3𝜋r³.

 ___N

Calculate magnitudes of the components of a vector V if the magnitude of V is 10m and the angle between the vector an the X axis is 45 ?

Determine the net heat radiated by the black body disc of mass 6g and radius 4cm at 40⁰C, initially kept at 30⁰C.

Determine the net heat transfer through the black body disc with radius1cm and mass 6g, at 0⁰C when transferred to a surrounding temperature of 10⁰C.

Find the steady-state temperature of the black body disc having radius 3cm and mass 5g at 10 ⁰C surrounding temperature, when kept initially at -10 ⁰C.