What could the football players pushing the sled do to make it move quickly

A diffraction grating is illuminated with yellow light at normal incidence. The pattern seen on a screen behind the grating consists of three yellow spots, one at zero degrees (straight through) and one each at ±45°.

You are holding a block of wood with dimensions 3 cm 6 cm 9 cm on the palm of your hand. Which side must be touching your hand for you to experience the greatest force?

What three ways does the respiratory system modify air before it reaches the lungs?

A customer sits in an amusement park ride in which the compartment is to be pulled downwards in the negative direction of y axis with accelaration magnitude of 1.24 g (g=9.8 m/sec ^2). A 0.567 gms coin is placed on customers knee.

A person with a mass of 75 kg skis from rest down a slope at an angle of 31 degrees. The coefficient of kinetic friction of his skis on the snow is 0.095. What is his acceleration?

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?