Why must you repeat steps three and four in the scientific method

A stone fell from the top of a cliff into the ocean. In the air, it had an average speed of 161616 / text{m/s}m/sstart text, m, slash, s, end text.

Why are chemical bonds important?

Sheila weighs 60 kg and is riding a bike. Her momentum on the bike is 340 kg•m/s. The bike hits a rock, which stops it completely and throws Shelia forward onto the pavement If there is no net force on the system, what is Sheila's velocity

How much force to be applied to accelerate cart 0.3m/sec2 if cart has 65 kg mass

What happens in terms of energy when a moving car hits a parked car, causing the parked car to move? The moving car transfers kinetic energy to the parked car. Kinetic energy in the moving car disappears. Kinetic energy in the parked car is created.

A 90kg cannon fires 100kg shell with muzzle velocity of 75m/s. Calculate the recoil velocity of the cannon relative to the ground

The planet XYZ traveling about the star ABC in a circular orbit takes 24 hours to make an orbit. Assume that the orbit is a circle with radius 89 comma 000 comma 00089,000,000 mi. Find the linear speed of XYZ in miles per hour.

Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is a. 3.0" 102 N b. 0.22 N c. 0.16 N d. 0.30 N e. 0.98 N

What is the formula for calculating the mass when i have the number of volume and density

What is the name for potential difference that causes current to flow? (A) electric charge (B) static discharge (C) voltage