We use the system to determine noise level

A linear accelerator uses alternating electric fields to accelerate electrons to close to the speed of light. A small number of

diamong [38]

Answer:i

9E13 ELECTRONS

Explanation:

First we find the number of charges in two hrs

Which is - 2x 7200=- 14400NC

So no of electrons is now q/e

-144x10^-7/-1.6*10^-19

= 9*10^13

7 0

3 years ago

For the different values given for the radius of curvature RRR and speed vvv, rank the magnitude of the force of the roller-coas

nirvana33 [79]

Explanation:

The force of the roller-coaster track on the cart at the bottom is given by :

$F=\dfrac{mv^2}{R}$ , m is mass of roller coaster

Case 1.

R = 60 m v = 16 m/s

$F=\dfrac{(16)^2m}{60}=4.26m\ N$

Case 2.

R = 15 m v = 8 m/s

$F=\dfrac{(8)^2m}{15}=4.26m\ N$

Case 3.

R = 30 m v = 4 m/s

$F=\dfrac{(4)^2m}{30}=0.54m\ N$

Case 4.

R = 45 m v = 4 m/s

$F=\dfrac{(4)^2m}{45}=0.36m\ N$

Case 5.

R = 30 m v = 16 m/s

$F=\dfrac{(16)^2m}{30}=8.54m\ N$

Case 6.

R = 15 m v =12 m/s

$F=\dfrac{(12)^2m}{15}=9.6m\ N$

Ranking from largest to smallest is given by :

F>E>A=B>C>D

5 0

3 years ago

3. Which statement best describes the research projects that are funded by private

SOVA2 [1]

Answer:

b. Research projects for a specific cause

Explanation:

Research funded by private foundations are usually for a specific cause. These type of research are usually properly scrutinized, and must have a high probability of success. Most of these projects may not be to benefit the consumers, but are usually done with a special purpose in mind.

5 0

3 years ago

Which sentence correctly describes a friction force? A. It acts in the same direction as the motion of an object. B. It acts in

KatRina [158]

Answer:

B

Explanation:

Friction acts in a direction opposite to the motion of an object

5 0

4 years ago

A jet plane is flying at a constant altitude. At time t1 = 0, it has components of velocity vx = 90 m/s, vy = 110 m/s. At time t

Vika [28.1K]

Answer:

a) See attachment.

b) a_avg = -8.66 i - 2.33 j

c) a = 195 degrees from + x-axis. |a_avg| = 8.97 m/s^2

Explanation:

Given:

- Initial Velocity V_i = (90 i + 110 j)

- Final velocity V_f = (-170 i + 40 j)

- t_i = 0

- t_f = 30.0 s

Find:

(a) Sketch the velocity vectors at t1 and t2. How do these two vectors differ?

(b) the components of the average acceleration

(c) the magnitude and direction of the average acceleration.

Solution:

- The change in velocity is given by:

Δ V = (V_f - V_i)

Δ V = ( -170 i - 90 i + 40 j - 110 j)

Δ V = (-260 i - 70 j)

- The change in time is given as:

Δ t = t_f - t_i = 30 - 0 = 30 s

-The average acceleration is:

a_avg = Δ V / Δ t

a_avg = (-260 i - 70 j) / 30

a_avg = -8.66 i - 2.33 j

- The magnitude of acceleration is:

|a_avg| = sqrt ( 8.66^2 + 2.33^2)

|a_avg| = sqrt (80.4245)

|a_avg| = 8.97 m/s^2

- The direction of acceleration is given by:

tan (Q) = a_y / a_x

Q = arctan(a_y / a_x)

Q = arctan(2.33 / 8.66)

Q = 15 degrees

Hence, 180 + 15 = a. a = 195 degrees from + x-axis.

8 0

3 years ago