On a graph showing distance versus time, a horizontal line represents an object that is?

a. moving at a constant speed

b. increasing its speed

c. decreasing its speed

d. not moving at all

Summarize what you read on the three websites you visited by identifying the advantages and disadvantages of using plastics.

I am a planet with no solid surface, hot liquid deep inside, and a rocky core at my center. I have rings made of small particles and dust, and 67 known moons. Which planet am I? A. Jupiter B. Saturn C. Neptune D. Pluto

The roads are icy, and you observe a head-on collision on Summit, at the corner with Rhodes: a 1ton car swerves out of his lane and slides through a stop sign at 43 mph straight into a 3 ton SUV traveling at 13mph in the other direction.

A proton is placed in an electric field of intensity 700 n/ c. what is the magnitude and direction of the acceleration of this proton due to this field?

A 24-gauge copper wire has a diameter of 0.51 mm and is used to connect a speaker to an amplifier. The speaker is located 7 m away from the amplifier.

A lorry with a mass of 5000kg accelerates to overtake a caravan on the motorway. Its acceleration is 1.5m/s². What force must the engine be providing? You can ignore the effects of friction and air resistance

Norma kicks a soccer ball with an initial velocity of 10.0 meters per second at an angle of 30.0% if the ball moves though the air for 3.2 seconds what's the horizontal distance traveled by the ball

Suppose s (t) is the position of an object moving along a line at time t is greater than or equal to 0. What is the average velocity between the times t=a and t=b? What is the instantaneous velocity at t=a?

Estimate how long it would take one person to mow a football field using an ordinary home lawn mower. suppose that the mower moves with a 1-km/h speed, has a 0.5-m width, and a field is 360 ft long and 160 ft wide. 1 m = 3.281 ft.

Badri makes the table below to review the factors that affect the electric force between objects. Which change will correct the error in Badri's table?