# phisic

12 results

**physics**

Phisic

**Phisic mechanic**

An applied force varies with position according to eq. Fx = 3x3 - 5, where x is in m, and Fx in N. What is the work of this force on a body that moves from x to x = 4 m = 7 m?

**phisic**

Consider an airplane that normally has an air speed of 120 km/h in a 105 km/h crosswind blowing from west to east. Calculate its ground velocity when its nose is pointed north in the crosswind?

**phisic**

Treating air as an ideal gas of diatomic molecules, calculate how much heat is required to raise the temperature of the air in an 7.47 m by 14.9 m by 2.87 m room from 19.9°C to 21.7°C at 101 kPa. Neglect the change in the number of moles of air in the room

**Phisic mechanic**

A car of 1,500 kg accelerates uniformly from rest to a speed of 10 m / s in 3 s. (A) Find the work done on the car during that interval. (B) Find the average power developed by the engine in those first 3 s. (C) Find the instantaneous power of the motor at t = 2 s.

**Phisic mechanic**

A trailer mechanic pushes a 2500 kg car, home to a speed v, performing a job during the 5000 J. In this process, the car moves 25 m. Neglecting friction between the car and roadway: (A) What is the final velocity v of the car? (B) What horizontal force exerted on the car?

**PHISIC help**

A bouncy rubber ball is dropped from a height of about a metre above the ground .it falls to the ground, bounces and then rises back to almost the height from which it was dropped. Describe the main energy transformations that take place from the point at which the ball first ...

**PHISIC help**

water waves in a ripple tank are diffracted by a narrow aperture.if the wavelength of the water waves is decreased slightly whilst keeping the aperture size the same ,which one of the following will happen? the waves will spread out more the waves will spread out less the ...

**Phisic**

A driver runs to the south at 20 m / s for 3 min, then turns west and runs to 25 m / s for 2 min, and finally turns to the northwest at 30 ni / s for I min. Find in this movement, 6 min, (a) the displacement vector the driver, (b) the speed climb and the average driver (C) the...

**PHISIC**

A bouncy rubber ball is dropped from a height of about a metre above the ground .it falls to the ground, bounces and then rises back to almost the height from which it was dropped. Describe the main energy transformations that take place from the point at which the ball first ...

**phisic**

A block of mass m1 = 26 kg rests on a wedge of angle θ = 48∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...

**phisic**

(a) One such reaction fuses two nuclei of carbon-12 (12/6C ) to form an atom of neon (20/10Ne ) with the emission of an α-particle. Write an equation for this process, indicating the atomic number and mass number of each of the products in the usual way. (b) Another ...

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