How much mass is needed for a black hole?

A whale swims due east for a distance of 6.9 km, turns around and goes due west for 1.8 km, and finally turns around again and heads 3.7 km due east.

The fact that the sun rises and sets at different times during the day depending on the time of year is an example of a data trend. True or False

Kaitlyn builds a project in which light bulb A and light bulb B are in parallel circuits. The project has a switch and uses a battery for its source of voltage. She connects her battery and neither light turns on.

Bob and John are pulling in different directions. If Bob is pulling to the right with a force of 10N, and John is pulling to the left with a force of 12N A) What is the net force acting on the box?

An automobile accelerates from rest at 1 + 3 * sqrt (t) mph/sec for 9 seconds. how far does it travel in those 9 sec?

A tube, open at only one end, is cut into two shorter (nonequal) lengths. The piece that is open at both ends has a fundamental frequency of 422 Hz, while the piece open only at one end has a fundamental frequency of 666 Hz.

Table tennis the path of a table-tennis ball after being hit and hitting the surface of the table can be modeled by the function h=-4.9t (t-0.42) where h is the height in meters above the table and t is the time in seconds.

A coat rack weighs 65.0 lbs when it is filled with winter coats and 40.0 lbs when it is empty. The base of the coat rack has an area of 452.4 in2.

An initially stationary object experiences an acceleration of 6 m/s2 for a time of 15 s. How far will it travel during that time?

How was helium first discovered? mining of the radioactive element uranium using spectral analysis of the Suns' emission spectra o hubble obtaining samples from explosions off the surface of the sun deep sea mining off the coast of Texas