What concept or principle best explains why

A 0.25 kg hockey puck is sliding along the ice with an initial velocity of 5 m/s when a player strikes it with his stick, causin

Margaret [11]

I = Δmv = mv₁ - mv₂

m = 0.25 kg
v₁ = 5 m/s
v₂ = - 30 m/s

5 0

3 years ago

What plate boundaries are in the alps

ruslelena [56]

Answer:

The Alps consist of parts of the European Plate, a former Jurassic to Lower Cretaceous ocean floor, and the Adria Plate as part of the African Plate. A complicated pattern of overthrusted nappes characterizes the tectonic style. As a general rule, tectonically higher nappes originate further south.

Hope it helps you

4 0

3 years ago

Read 2 more answers

Describe the electron's path in this field. Describe the electron's path in this field. The electron will move in a clockwise ci

Jlenok [28]

Answer: D - The electron will move in a counterclockwise circular path if viewed in the direction of the magnetic field.

Explanation:

When the electron enters the field at an angle to the field direction the resulting path of the electron will be helical. Such motion occurs above the poles of the Earth where charges particles from the Sun spiral through the Earth's field to produce the aurorae.

Magnetic force on an electron = BILsinØ = B[e/t][vt] = BevØ

where v is the electron velocity

In a magnetic field the force is always at right angles to the motion of the electron (Fleming's left hand rule) and so the resulting path of the electron is circular.

4 0

3 years ago

Explain the relationship between observations and hypotheses.

dlinn [17]

in Scientific method observation comes first,,,
hypothesis is a short time theory made on the basis of observation..
hypothesis depends upon observation...
you suggest any statement about the phenomenon that you felt either my your mind or senses that is hypothesis...

7 0

4 years ago

A 1200 kg car starts from rest and travels 100m in a time of 10 seconds . A) what is the acceleration of the car? B) what force

SVEN [57.7K]

Given:
Mass (m) = 1200 kg
Distance (s) = 100 m
Time (t) = 10 seconds
Now,
$velocity (v) = \frac{distance}{time}$

= $\frac{100~ m}{10~seconds}$

= 10 m/s
Note that this one is the final velocity.
We also know that,
initial velocity (u) = 0 m/s ....... because the car starts from rest.
Now,
$acceleration (a)= \frac{change~in~velocity}{time}$

= $\frac{v-u}{t}$

= $\frac{10-0}{10}$

= 1 m/s²
Now,
Force (F) = mass (m) * acceleration (a)
= 1200 kg * 1 m/s²
= 1200 kg.m/s²
= 1200 N
Now,
Work Done (W) = Force (F) * displacement (s) ....note that displacement is same as distance.
 = 1200 N * 100 m
 = 120000 N.m
= 120000 J
Now,
Power (P) = $\frac{Work~done(W)}{time(t)}$

= $\frac{120000~J}{10s}$

= 12000 J/s
= 12000 watt
SO,
A) The acceleration of the car is 1 m/s².
B) 1200 Newton (N) force must have acted on the car.
C) The velocity of the car after 10 seconds is 10 m/s.
D) 120000 Joule (J) work was done on the car.
E) The engine produced a minimum power of 12000 watt.

5 0

4 years ago