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3 years ago

PLEASE PLEASE HELP!!

Physics

1 answer:

boyakko [2]3 years ago

3 0

Answer:

you have patience the distance.

Explanation:

the train leaves at 6.30.

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Find the volume of a box that is 122 cm long, 51 cm wide and 13 cm high. V= ________cm³

DochEvi [55]

Answer:

80,886 cm^3

Explanation:

v= lwh (also known as length × width × height)

v = 122cm × 51cm × 13cm

v = 80,886 cm^3

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4 years ago

An open system starts with 52 J of mechanical energy. The energy changes

MArishka [77]

Answer:

ITS C 47

Explanation:

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4 years ago

Read 2 more answers

Albert's laboratory is filled with a constant uniform magnetic field pointing straight up. Albert throws some charges into this

guajiro [1.7K]

Answer:

$\vec{F}=qB(v_y \hat{i} - v_x\hat{j})$

Explanation:

The force excerted by a magnetic field on a charged particle is given by the Lorentz force:

$\vec{F} = q \vec{v} \times \vec{B}$

Lets consider the z-direction of our coordinate system the same direction of the magnetic field, that is:

$\vec{B} = B \hat{k}$

Let us consider that the velocity of a given particle is:

$\vec{v} = v_x\hat{i} + v_y \hat{j} + v_z \hat{k}$

Therefore, since k×k = 0

$\vec{v} \times \vec{B} = (v_x\hat{i} + v_y \hat{j} + v_z \hat{k}) \times B\hat{k}\\\vec{v} \times \vec{B} = (Bv_x \hat{i} \times\hat{k}) + (Bv_y \hat{j}\times\hat{k})$

And since i, j , k are a rigth hand system:

i × j = k

j × k = i

k × i = j --> i × k= -j

$\vec{v} \times \vec{B} = Bv_x (-\hat{j}) + Bv_y \hat{i} = Bv_y \hat{i} - Bv_x\hat{j}$

Threfore, if the particle has charge q and velocity v = (vx,vy,vz), the magnetic force it will feel will be

$\vec{F}=qB(v_y \hat{i} - v_x\hat{j})$

4 0

4 years ago

22. A race car accelerates from 0.0 m/s to 5 m/s with a displacement of 2.5 m. What is the

yanalaym [24]

Answer:

Option A

$5 m/s^{2}$

Explanation:

From fundamental equation of motion

$v^{2}=u^{2}+2as$ where v is the final velocity, u is the initial velocity, a is the acceleration of the body and s is the displacement.

Since the initial velocity is zero

$v^{2}=2as$

Making acceleration, a the subject of the formula then

$a=\frac {v^{2}}{2s}$

Substituting 5 m/s for v and 2.5 m for s then

$a=\frac {5^{2}}{2\times 2.5}=5 m/s^{2}$

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3 years ago

Technician A says that a proper U-joint inspection can be done with the driveshaft in place on the vehicle. Technician B says th

Julli [10]

Answer:

TECHNICIAN B

Explanation: Drive shaft is an elongated part of the drive system made of steel of a vehicle that transmits the ENGINE TORQUE to the WHEELS of a vehicle. For proper inspection a technician is expected to completely remove the driveshaft to check all its compactment. It is Cylindrical and usually used for REAR-WHEEL-VEHICLES. Drive shafts are known by different names like propeller shaft,Cardan shaft etc it has different types which range from

One-piece drive shaft ,Two-piece drive shaft to Slip-in-tube drive shaft .

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3 years ago