Many things can alter your heart rate including: exercise, diet, nutrition, sugar, and caffeine

A dry cleaner throws a 20 kg bag of laundry onto a stationary 8.3 kg cart. the cart and laundry bag begin moving at 2.6 m/s to t

Bond [772]

The total momentum before and after the collision must be conserved.

- Let's start from the end: at this point, both cart and laundry bag are moving together, with a total mass of (m1+m2) and velocity 2.6 m/s. Therefore, the total momentum is
$p_f = (m_1+m_2) v_f =(20 kg+8.3 kg)(2.6 m/s)=73.6 kg \cdot m/s$

- The momentum must be conserved, so the initial momentum must be equal to this value:
$p_i = p_f = 73.6 kg \cdot m/s$

- At the beginning, the cart is stationary, so its momentum is zero. There is only one momentum, the one of the bag, which has a mass of 20 kg and unknwon velocity vi:
$p_i = m_1 v_i$

- So, using the conservation of momentum we find
$m_1 v_i = 73.6 kg \cdot m/s$
and from this, the initial velocity of the laundry bag:
$v_i = \frac{p_f}{m_1}= \frac{73.6 kg \cdot m/s}{20 kg}=3.7 m/s$

3 0

3 years ago

Use the concept of feilds to describe how forces can act from a distance

o-na [289]

There are other forces that act at a distance, including gravity and static electricity. The force of magnetism is related to electricity. In fact, magnetism is the result of a moving electric charge. You may be familiar with magnets attracting, or pulling, metal objects toward them.

3 0

3 years ago

An object in a certain direction with an acceleration in the perpendicular direction

geniusboy [140]

Answer:

An object moving in certain direction with an acceleration in the perpendicular direction. The above condition is possible . Example of such situation in life would be when stone tied to a string whirling in a circular path

Hope this helps and pls mark as BRAINLIEST :)

3 0

3 years ago

A diverging lens has a focal length of magnitude 22.8 cm. (a) Locate the images for each of the following object distances. 45.6

Nostrana [21]

(a) -15.2 cm

We can solve the problem by using the lens equation:

$\frac{1}{f}=\frac{1}{p}+\frac{1}{q}$