What is one difference between a window, a leaf, and a metal spoon?

A car accelerates at 2 m/s² starting from rest. What is the speed it reaches 15 s after the start of the journey? (2 marks)

ick jumps off his roof which is 10 meters tall onto his trampoline which has a height of 1 meter and acts like a spring. Nick has a mass of 70 kg and sinks 0.4 meters into the trampoline before coming to a complete stop.

In hydrogen, the transition from level 2 to level 1 has a rest wavelength of 121.6 nm. (A) Find the speed and direction for a star in which this line appears at wavelength 120.6 nm.

Aquatic ecosystems consist of two different layers with respect to light. The photic zone is where light penetrates the water, at the surface and a little below.

Sharpening a pencil leaves behind pencil shavings. is sharpening a pencil a physical change or a chemical change

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then The fringes stay the same brightness and get closer together.

The gravitational potential has a zero value gravitational field in the same place is? Maximum or null indeterminate

In four-seater countries, temperature drops below 0 ° C during peak winter. Why only the frozen surface of the water instead of the whole river and the lake freezes?

Which type of circuit is more useful and why

how much current is in a circuit that includes a 9-volt battery and a bulb with a resistance of 3 ohms?