Answer: 3.1107grams of fat.
Explanation:The speed to cover 800 km in 20 hours will be 40km/hr, Because
Speed =Distance/Time.
This is equal to 72,000 seconds. At a power consumption of 1.7 W, the bird will consume (1.7 X 72,000) =122,400 J of energy.
A gram of fat contains about (9.4 Calories X 4186 J/Calorie) ,=39348 joules of energy, the bird will need (122,400 / 39,348) = 3.1107 grams of fat.
<h3>2.<u> Answer;</u></h3>
Momentum
<h3><u>Explanation;</u></h3>
- <em><u>Momentum refers to mass in motion, which means that objects that have mass and are in motion, will posses momentum, that is, they have their mass in motion. </u></em>
- <em><u>Momentum is given as the product of velocity of an object and its mass. Therefore, the amount of momentum possessed by a moving object or body is the product of mass and velocity. That is; p = m × v</u></em>
- From the equation, momentum is directly proportional to both mass and velocity.
<h3>3. <u>Answer;</u></h3>
Momentum
<h3><u>Explanation;</u></h3>
- <em><u>During collision, a force acts upon a body for a given amount of time change the velocity of an object. Product of force and time is called impulse</u></em>. The product of mass and velocity change is the change in momentum.
- <em><u>During collision the momentum change experienced by one object is equal in magnitude and opposite in direction to the momentum change experienced by the other object in collision.</u></em>
- That is; M1V1 =M2V2
<h3>4. <u>Answer; </u></h3>
= 250 kgm/s
<h3><u>Solution and explanation;</u></h3>
- <em><u>Momentum is given as the product of velocity of an object and its mass. </u></em>Therefore, the amount of momentum possessed by a moving object or body is the product of mass and velocity.
- That is; p = m × v
- mass = 50 kg, velocity = 5 m/s ; thus momentum will be;
- p = 50 × 5 = 250 kgm/s
Therefore, <em><u>momentum of the ice skater will be; 250 kgm/s</u></em>
Answer:
Hooke's law states that the applied force F equals a constant k times the displacement or change in length x, or F = kx. ... Hooke's law describes the elastic properties of materials only in the range in which the force and displacement are proportional.
Explanation: