All categories

2 years ago

How long will bus take to travel 150 km at an average speed of 40km/hr

Physics

1 answer:

romanna [79]2 years ago

7 0

Answer:

3.75 hours

Explanation:

By $v = \frac{d}{t}$

where v is the velocity (or speed in this case)

d is the distance travelled

t is the time taken

$t = \frac{150}{40}=3.75$
Therefore it takes 3.75 hours for the bus to travel 150 km and 40 km/hr.

You might be interested in

A rope, under a tension of 221 N and fixed at both ends, oscillates in a second-harmonic standing wave pattern. The displacement

mamaluj [8]

Answer:

sup qwertyasdfghjk

Explanation:

3 0

2 years ago

Capacitor 2 has half the capacitance and twice the potential difference as capacitor 1. What is the ratio (U_{\rm C})_1/\,(U_{\r

IrinaK [193]

Answer:

1/2

Explanation:

The energy stored in a capacitor is given by

$U=\frac{1}{2}CV^2$

where

C is the capacitance

V is the potential difference

Calling $C_1$ the capacitance of capacitor 1 and $V_1$ its potential difference, the energy stored in capacitor 1 is

$U=\frac{1}{2}C_1 V_1^2$

For capacitor 2, we have:

- The capacitance is half that of capacitor 1: $C_2 = \frac{C_1}{2}$

- The voltage is twice the voltage of capacitor 1: $V_2 = 2 V_1$

so the energy stored in capacitor 2 is

$U_2 = \frac{1}{2}C_2 V_2^2 = \frac{1}{2}\frac{C_1}{2}(2V_1)^2 = C_1 V_1^2$

So the ratio between the two energies is

$\frac{U_1}{U_2}=\frac{\frac{1}{2}C_1 V_1^2}{C_1 V_1^2}=\frac{1}{2}$

4 0

2 years ago

Express 50,000 m/s2 in scientific notation. 5.0 x 103m/s2 0.5 x 105m/s2 5.0 x 104m/s2

Tresset [83]

Answer would be 5.0x104m/s2

8 0

3 years ago

Read 2 more answers

What is the relation between force and acceleration ?

stepladder [879]

Explanation:

Newton's second law shows that there is a direct relation ship between force and acceleration . the grater force that is applied on a object of given mass the more the accelerate. for example doubling the force in the object doubles it's acceleration.

8 0

2 years ago

Read 2 more answers

Why are some forces considered to be noncontact forces? A. Objects must be far apart in order to exert a force. B. Objects do no

kompoz [17]

Answer:

B. Objects do not have to touch each other to experience a force.

Explanation:

For example ..One of the noncontact forces is magnetic force whereby a magnetic object will be attracted to another magnetic object of oppsite charged particles, through waves called electromagnetic waves. On the other hand, the two magnetic objects of similar charged particles can repel through electromagnetic waves..

8 0

2 years ago