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A vehicle is travelling at 72 km/h (20 m/s) when the driver sees a couple walk out on to the road 20m ahead (d=20m). The driver brakes immediately and stops just in time to avoid impact (i.e braking distance is 20m). The vehicle decelerates at a constant, gradual rate without skidding.

If the mass of the car is 1000kg, what was the work and power required to decelerate the vehicle?

Solve the following integral: ∫(2x^3 + 5x^2 - 3x + 4) dx

Remember to use the power rule for integration and follow the steps to find the antiderivative of the function.

Balance the following chemical equation: 

Fe + O2 -> Fe2O3

4. If a 2 mm thick plate of material transmits 70% of the incident light, what percentage will be transmitted by a 0.5 mm thick plate?

An object is launched vertically in the air at 26.95 meters persecond from a 9 meter tall platform. Using the projectile motionmodel, h(t)= -4.9t^2 + vt + h, where h(t) the height of theprojectile t seconds after its departure, v is the intial velocityin meters per second, and h is the initial height in meters,determine how long it will take for the object to reach its maximumheight? What is the maximum height?

An ideal Otto cycle with Argon as the working fluid has a compression ratio of 6.8. The minimum and maximum temperatures in the cycle are 450 R and 2,260 R. Assuming constant specific heats, determine

(a) the amount of heat transferred to the argon during the heat-addition process

(b) the thermal efficiency

(c) the thermal efficiency of a Carnot cycle operating between the same temperature limits

1. PID (pituitary induced diabetes) cause by__________________?
2. What is ebstian anomalies? 

why is myelination so critical for the normal functioning of a neuron, and the nervous system as a whole?

the field of study concerned with the ways in which the functioning of the nervous system influences the immune system is called______.

a. psychoneuroimmunology
b. neuroimmunology

1. What are the types of immunity ??

2. Study of immune system is called as..??

What is resilience ?

 _____________ determines how much, how long, and when the valves open.

A basketball is thrown horizontally with an initial speed of 4.90m/s. A straight line drawn from the release point to the landing point makes an angle of 30.0 degrees with the horizontal. What is the release height?

Fill in the letter of the choice that best answers the question. You want to make a model of the sun, Earth, and the moon. Which objects would best represent the sun, Earth, and the moon?

A. lamp = sun; basketball = Earth; tennis ball = moon.

B. lamp = moon; basketball = Sun; tennis ball = Earth.

C. lamp = Earth; basketball = moon; tennis ball = sun.

D. lamp = moon; basketball = Earth; tennis ball = sun.

I need help with this question please