What are the outward forces exerted by surface

A swimmer swims 3/5 the width of a river at one velocity, then swims the remainder of the river at half her initial velocity. What was the average speed across the river?

Ideas of the atom have changed over time. Which idea do scientists now consider inaccurate? Electrons are arranged in layers. Electrons have a negative charge. The nucleus is the center of the atom. An atom is solid material.

If a motorcycle moves with a constant velocity, can you conclude that there is no net force acting on it?

An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. what force might be responsible for the attraction between the balloon and the wall?

What is the speed of light in water?

You push a 45 kg wooden box across a wooden floor at a constant speed of 1.0 m/s. The coefficient of kinetic friction is 0.25. Now you double the force on the box. How long would it take for the velocity of the crate to double to 2.0 m/s

What is the middle layer of earth called

If 10 calories of energy are added to 2 grams of ice at - 30° C, calculate the final temperature of the ice. (Notice that the specific heat of ice is different from that of water.) T. F = -20° C -30° C 30° C 40° C

Are microwaves and radio waves faster or slower than other types of electromagnetic energy?

Write 5 sentences on the importance of including vegetables in your diet.