Why are multiple trials important when carrying out an experiment?

What happens when several parallel rays strike a plane mirror

Which type of sedimentary rock is formed from rock and mineral fragments weathered from rocks at earth's surface?

an 114 g mass is dropped from rest at a height of 64.1 cm above a spring of negligible mass. The mass then compresses the spring to a maximum displacement of 4.1081 cm. What is the spring force constant k of the spring

A frog jumps with a velocity of 3.2 m/s at an angle of 25 degrees above horizontal. What is the vertical component of its velocity?

Which of the following elements holds its electrons with the most energy? A.) Lithium (Li) B.) Beryllium (Be) C.) Boron

n open rectangular tank is filled to a depth of 2 m with water (density 1000 kg/m3). On top of the water there is a 1 m deep layer of gasoline (density 700 kg/m3). The width of the tank is 1 m (the direction perpendicular to the paper).

Is the sun considered a star?

If I get a spare in one frame and then roll a 1 and 5 in the next frame, what would my score for the spare be? A 10 B 11 C 16 D17

2x^2:3=dg solve for x

A 2.25-kg block is released from rest on a ramp of height h. when the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.