What happened to an iron bar if it is heated from 32 degree Celsius to 64 degree Celsius

Who has ideas for a prank

Technician A says coils are usually wrapped around an iron core. Technician B says coils block direct current flow. Who is right?

Parallel light waves hit the surface of a still lake and reflect in the same direction. Which interaction of light and matter does this illustrate? scattering diffuse reflection refraction regular reflection

Carbon dioxide is a gas produced by___ and used by ___ a) photosynthesis ... carbon dioxide b) animals ... plants c) carbon dioxide ... photosynthesis d) plants ... animals

Leaky sandbag A bag of sand originally weighing 144 lb was lifted at a constant rate. As it rose, sand also leaked out at a constant rate. The sand was half gone by the time the bag had been lifted to 18 ft.

Suppose s (t) is the position of an object moving along a line at time t is greater than or equal to 0. What is the average velocity between the times t=a and t=b? What is the instantaneous velocity at t=a?

Estimate how long it would take one person to mow a football field using an ordinary home lawn mower. suppose that the mower moves with a 1-km/h speed, has a 0.5-m width, and a field is 360 ft long and 160 ft wide. 1 m = 3.281 ft.

Badri makes the table below to review the factors that affect the electric force between objects. Which change will correct the error in Badri's table?

A star with the same mass of the sun has a newly discovered planet whose semi-major axis of 2.48 au and an eccentricity of 0.08. what is the aphelion distance of the new planet

A weather balloon is inflated to a volume of 2.2 x 10^3 L with 374 g of helium. What is the density of helium in grams per liter?