SO what exactly is beyond our atmosphere, like space, has anybody actually been in space? or are we just making hopeless fantasies

Find the acceleration that can result from a net force of 20 N exerted on a 2.8-kg

A constant force is exerted for a short time interval on a cart that is initially at rest on an air track. This force gives the cart a certain final speed.

A frequency generator sends a 550 Hz sound wave through both water and ice. What is the difference in wavelength between the wave produced in ice and the wave produced in water? 2.1 m 3.1 m 5.2 m 8.5 m

What happens to the magnetic field lines if like poles are repelling?

An object is projected horizontally at 8.0 m/s from the top of a 122.5 m cliff. how far from the base of the cliff will the object strike the ground?

What is the device to break a circuit called?

A 3 column table with 5 rows labeled table A. The first column is labeled voltage in volts with entries 1.0, 5.0, 10, 20, 50. The second column is labeled current: calculated in amps with no entries.

When you stack three flashlight batteries in the same direction, you get a voltage of 3*1.5 volts = 4.5 volts. What voltage do you get if one of the batteries is turned to face in the opposite direction? a) 0 volts b) 1.5 volts c) 3 volts d) - 4.

If an ant were scaled up to the size of an elephant, the ant would be

A 4.0 kg food pack was dropped from a height of 200 m by a helicopter during flood relief operations. At what velocity will the food pack be falling halfway to the ground?