Ask question

Ask question

All categories

2 years ago

15

The equation below can be used to calculate a change in gravitational potential energy. What units must be used for h? Give the

full name, not the abbreviation.
e=m x g x h

1 answer:

Anni [7]2 years ago

8 0

Answer:

h = change in vertical position (height)

has units of distance.

Explanation:

You might be interested in

Some sharks can swim at average cruising speeds of three miles per hour. If a shark swam at that average speed for seven hours,

kari74 [83]

Answer:

21 miles

Explanation:

3 miles an hour for 7 hours

Its simply 7m*3m/hr=21 miles

8 0

3 years ago

. Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. (a) What is the electri

exis [7]

Answer:

Explanation:

electrical field strength = potential diff / distance

= ( 450 - 0 ) / 8 x 10⁻²

= 5625 V/m

b )

potential difference = electric field x distance

= 5625 x .10

= 562.5 V

6 0

3 years ago

A truck covers 40.0 m in 7.45 s while uniformly slowing down to a final velocity of 3.50 m/s.

astra-53 [7]

Answer:

(A) Original velocity will be 7.244 m /sec

(B) Acceleration will be $-0.5026m/sec^2$

Explanation:

We have given distance covers by truck s = 40 m

Time taken by truck to cover this distance t = 7.45 sec

Final velocity v = 3.50 sec

According to second equation of motion

$S=ut+\frac{1}{2}at^2$

$40=u\times 7.45+\frac{1}{2}\times a\times 7.45^2$

$7.45u+27.751a=40$ -----eqn 1

According to first equation of motion

v = u + at

So $3.5=u+7.45a$ -----eqn2

Solving equation 1 and 2

a = $-0.5026m/sec^2$

And u = 7.244 m /sec

(A) Original velocity will be 7.244 m /sec

(B) Acceleration will be

$-0.5026m/sec^2$

6 0

4 years ago

In an electron microscope, electrons are accelerated to great velocities. Calculate the wavelength of an electron traveling with

Diano4ka-milaya [45]

Answer:

Wavelength, $\lambda=1.04\times 10^{-13}\ m$

Explanation:

It is given that,

Velocity of an electron, $v=7\times 10^6\ m/s$

Mass of an electron, $m=9.1\times 10^{-28}\ kg$

We need to find the wavelength of an electron. It can be calculated using the De- Broglie wavelength as :

$\lambda=\dfrac{h}{mv}$

$\lambda=\dfrac{6.63\times 10^{-34}}{9.1\times 10^{-28}\times 7\times 10^6}$

$\lambda=1.04\times 10^{-13}\ m$

So, the wavelength of an electron is $1.04\times 10^{-13}\ m$ . Hence, this is the required solution.

7 0

3 years ago

The position of a ball as a function of time is given by

Andre45 [30]

Answer:

x = -6.5 meters

Explanation:

The position of a ball as a function of time t is given by :

$x=3\ m+(-5\ m/s)t$ ..................(1)

Where t is time in seconds

We need to find the position of the ball at 1.9 s. It can be simply calculated putting t = 1.9 s in equation (1) as :

$x=3+(-5)(1.9)$

x = -6.5 meters

So, the position of the ball at 1.9 seconds is -6.5 meters. Hence, this is the required solution.

6 0

4 years ago