Classify which of the following is a substance: tablero salt, seawater or sand? Explain how you know.

An acorn falls from a tree. how fast is the acorn moving after 1.2 seconds

If the force on the tympanic membrane (eardrum) increases by about 1.4 N above the force from the atmospheric pressure, the membrane can be damaged.

Two capacitors of capacitances 25 µF and 50 µF are connected in series with a 33-V battery. How much energy is stored in the 25-µF capacitor when it is fully charged?

Why does your body feels like it is being pushed back when the car starts back up again

Which type of star is smaller neutron or dwarf

A 5.00*105-kg subway train is brought to a stop from a speed of 0.500 m/s in 0.400 m by a large spring bumper at the end of its track. what is the force constant k of the spring

A moving object always has energy in its?

What is the volume of a box that is 12 cm long, 2 cm wide, and 3 cm high?

Suppose a child drives a bumper car head on into the side rail, which exerts a force of 4000 N on the car for 0.200 s. (a) What impulse is imparted by this force?

If a soundproof door is almost shut but still leaves a small opening, what wave phenomenon is responsible for someone being able to hear sound from the room while standing by the wall to the side of the opening?